Information transmission method, apparatus, and system

0001This application claims priority to Chinese Patent Application <patcit id="pcit0001" dnum="CN2013083502W"><text>PCT/CN2013/083502</text></patcit>, filed with the Chinese Patent Office on September 13, 2013 and entitled "INFORMATION TRANSMISSION METHOD, APPARATUS, AND SYSTEM", which is incorporated herein by reference in its entirety.

TECHNICAL FIELD

0002The present invention relates to the communications field, and in particular, to an information transmission method, apparatus, and system.

BACKGROUND

0003In LTE (Long Term Evolution, Long Term Evolution) based cost-effective MTC (Machine Type Communication, machine type communication), coverage enhancement needs to be performed on coverage of an LTE network, so as to ensure that UE (User Equipment, user equipment) can reliably communicate with a base station when the UE is in a basement or channel quality is poor. In an existing LTE or LTE-A (LTE Advanced, LTE Advanced) system, time-domain resources are divided as radio frames, and the radio frames are numbered 0 to 1023. One radio frame includes 10 subframes, a time length of one subframe is 1 millisecond (1 ms), and subframes in each radio frame are numbered 0 to 9. In the existing LTE or LTE-A system, a PBCH (Physical Broadcast Channel, physical broadcast channel) for carrying one time of transmission of an MIB (Master Information Block, master information block), a PDCCH (Physical Downlink Control Channel, physical downlink control channel) for scheduling one time of transmission of an SIB 1 (System Information Block Type 1, system information block type 1), a PDSCH (Physical Downlink Shared Channel, physical downlink shared channel) for carrying one time of transmission of the SIB 1, a PDCCH for scheduling one time of transmission of SI (System Information, system information), and a PDSCH for carrying one time of transmission of the SI are all transmitted in one subframe.

0004In the case of coverage enhancement, the base station may transmit MIB information multiple times to improve transmission reliability of an MIB, and a PBCH for carrying multiple times of transmission of the MIB may be referred to as an enhanced PBCH. Similarly, the base station may transmit control information multiple times to improve transmission reliability of the control information, and a PDCCH for carrying multiple times of transmission of the control information may be referred to as an enhanced PDCCH; the base station may transmit data multiple times to improve transmission reliability of the data, and a PDSCH for carrying multiple times of transmission of the data is referred to as an enhanced PDSCH. The data herein includes, but is not limited to, an SIB 1, SI, another SIB, unicast data, a paging message, a random access response, or other common data.

0005In the existing LTE or LTE-A system, a TDD (Time Division Duplex, time division duplex) configuration is included in an SIB 1, where which subframes are special subframes and configurations of the special subframes are determined in the TDD configuration; and an MBSFN (Multicast-broadcast single-frequency network, multicast-broadcast single-frequency network) subframe configuration is included in an SIB 2, and SI (System Information, system information) cannot be transmitted in a special subframe or an MBSFN subframe. However, in the case of coverage enhancement, UE that requires coverage enhancement cannot learn the TDD configuration and the MBSFN subframe configuration before receiving the SIB 1 and the SIB 2. Therefore, when enhanced transmission is performed on first information, a subframe used in the enhanced transmission cannot be determined, thereby lowering transmission reliability of the first information. The first information may be a master information block, an SIB including a TDD configuration, or an SIB including an MBSFN subframe configuration. The enhanced transmission may be repeated transmission, spread spectrum transmission, transmission time interval bundling transmission, power increased transmission, or retransmission.

SUMMARY

0006Embodiments of the present invention provide an information transmission method, apparatus, and system, which can determine a subframe used in enhanced transmission of first information, improving transmission reliability of the first information.

0007To achieve the foregoing objective, the following technical solutions are used in the embodiments of the present invention:

0008According to a first aspect, an embodiment of the present invention provides an information transmission method, where the method includes: <ul id="ul0001" list-style="none" compact="compact"><li>determining a subframe for enhanced transmission of first information; and</li><li>repeatedly transmitting the first information multiple times in the determined subframe for the enhanced transmission of the first information, and skipping channel state information-reference signal CSI-RS transmission ontransmission of a resource element occupied by the enhanced transmission of the first information, where</li><li>the first information is a master information block MIB, and a quantity of times of repeatedly transmitting the MIB in at least one radio frame is greater than one time; or the first information is a system information block type 1 SIB 1, and a quantity of times of repeatedly transmitting the SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of repeatedly transmitting the first information in the determined subframe for the enhanced transmission of the first information is at least two times.</li></ul>

0009In a first possible implementation manner, according to the first aspect, for a frequency division duplex FDD system, the subframe for the enhanced transmission of the first information includes one or more subframes of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a time division duplex TDD system, the subframe for the enhanced transmission of the first information includes one or more subframes of the subframe 0, a subframe 1, the subframe 5, and a subframe 6.

0010In a second possible implementation manner, with reference to the first aspect or the first possible implementation manner, for the FDD system, the subframe for the enhanced transmission of the first information includes the subframe 9; or the subframe for the enhanced transmission of the first information includes the subframe 4 and the subframe 9; and for the TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0; or the subframe for the enhanced transmission of the first information includes the subframe 0 and the subframe 5.

0011In a third possible implementation manner, with reference to the first aspect or the first possible implementation manner or the second possible implementation manner, the subframe for the enhanced transmission of the first information further includes: <ul id="ul0002" list-style="none" compact="compact"><li>for the FDD system, the subframe for the enhanced transmission of the first information further includes the subframe 0 and/or the subframe 5; and</li><li>for the TDD system, the subframe for the enhanced transmission of the first information further includes the subframe 1 and/or the subframe 6.</li></ul>

0012In a fourth possible implementation manner, with reference to the first aspect or the first possible implementation manner to the third possible implementation manner, for the FDD system, the subframe for the enhanced transmission of the first information includes the subframe 0, the subframe 4, the subframe 5, and the subframe 9; and for the TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0, the subframe 1, the subframe 5, and the subframe 6.

0013In a fifth possible implementation manner, with reference to the first aspect or the first possible implementation manner or the fourth possible implementation manner, the skipping channel state information-reference signal CSI-RS transmission ontransmission of a resource element occupied by the enhanced transmission of the first information specifically includes: <ul id="ul0003" list-style="none" compact="compact"><li>determining a resource element occupied by the CSI-RS transmission and a subframe for the CSI-RS transmission; and</li><li>if the subframe for the CSI-RS transmission collides with the subframe for the enhanced transmission of the first information, skipping transmitting the first information on the resource element occupied by the CSI-RS transmission in the determined subframe in which the enhanced transmission of the first information collides with the CSI-RS transmission.</li></ul>

0014In a sixth possible implementation manner, with reference to the first aspect or the first possible implementation manner or the fifth possible implementation manner, the skipping channel state information-reference signal CSI-RS transmission ontransmission of a resource element occupied by the enhanced transmission of the first information specifically includes: <ul id="ul0004" list-style="none" compact="compact"><li>determining a resource element occupied by the CSI-RS transmission; and</li><li>skipping transmitting the first information on the resource element occupied by the CSI-RS transmission in the determined subframe for the enhanced transmission of the first information.</li></ul>

0015In a seventh possible implementation manner, with reference to the first aspect or the first possible implementation manner or the sixth possible implementation manner, the skipping channel state information-reference signal CSI-RS transmission ontransmission of a resource element occupied by the enhanced transmission of the first information specifically includes: <ul id="ul0005" list-style="none" compact="compact"><li>determining a subframe for the CSI-RS transmission; and</li><li>skipping transmitting the first information in the subframe for the CSI-RS transmission.</li></ul>

0016In an eighth possible implementation manner, with reference to the first aspect or the first possible implementation manner to the seventh possible implementation manner, the determining a resource element occupied by the CSI-RS transmission specifically includes: <ul id="ul0006" list-style="none" compact="compact"><li>determining an available CSI-RS configuration according to a preset rule, or setting an available CSI-RS configuration and notifying user equipment of the available CSI-RS configuration by using signaling, where the available CSI-RS configuration includes one or more CSI-RS configurations; and</li><li>determining, according to the available CSI-RS configuration, the resource element occupied by the CSI-RS transmission.</li></ul>

0017In a ninth possible implementation manner, with reference to the first aspect or the first possible implementation manner to the eighth possible implementation manner, the determining a subframe for the CSI-RS transmission specifically includes: <ul id="ul0007" list-style="none" compact="compact"><li>determining an available CSI-RS subframe configuration according to a preset rule, or setting an available CSI-RS subframe configuration and notifying user equipment of the available CSI-RS subframe configuration by using signaling, where the available CSI-RS subframe configuration includes one or more CSI-RS subframe configurations; and</li><li>determining the subframe for the CSI-RS transmission according to the available CSI-RS subframe configuration.</li></ul>

0018In a tenth possible implementation manner, with reference to the first aspect or the first possible implementation manner to the ninth possible implementation manner, the signaling includes: an MIB, a system information block SIB, Radio Resource Control RRC common signaling, RRC dedicated signaling, Media Access Control MAC signaling, or physical layer signaling.

0019According to a second aspect, an embodiment of the present invention further provides an information transmission method, where the method includes: <ul id="ul0008" list-style="none" compact="compact"><li>determining a subframe for enhanced transmission of first information; and</li><li>receiving, in the determined subframe for the enhanced transmission of the first information, the first information that is repeatedly transmitted multiple times, and skipping CSI-RS transmission ontransmission of a resource element occupied by the received first information that is repeatedly transmitted multiple times, where</li><li>the first information is an MIB, and a quantity of times of receiving the repeatedly transmitted MIB in at least one radio frame is greater than one time; or the first information is an SIB 1, and a quantity of times of receiving the repeatedly transmitted SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of receiving the repeatedly transmitted first information in the determined subframe for the enhanced transmission of the first information is at least two times.</li></ul>

0020In a first possible implementation manner, according to the second aspect, for an FDD system, the subframe for the enhanced transmission of the first information includes one or more subframes of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a TDD system, the subframe for the enhanced transmission of the first information includes one or more subframes of the subframe 0, a subframe 1, the subframe 5, and a subframe 6.

0021In a second possible implementation manner, with reference to the second aspect or the first possible implementation manner, for the FDD system, the subframe for the enhanced transmission of the first information includes the subframe 9; or the subframe for the enhanced transmission of the first information includes the subframe 4 and the subframe 9; and for the TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0; or the subframe for the enhanced transmission of the first information includes the subframe 0 and the subframe 5.

0022In a third possible implementation manner, with reference to the second aspect or the first possible implementation manner or the second possible implementation manner, the subframe for the enhanced transmission of the first information further includes: <ul id="ul0009" list-style="none" compact="compact"><li>for the FDD system, the subframe for the enhanced transmission of the first information further includes the subframe 0 and/or the subframe 5; and</li><li>for the TDD system, the subframe for the enhanced transmission of the first information further includes the subframe 1 and/or the subframe 6.</li></ul>

0023In a fourth possible implementation manner, with reference to the second aspect or the first possible implementation manner to the third possible implementation manner, for the FDD system, the subframe for the enhanced transmission of the first information includes the subframe 0, the subframe 4, the subframe 5, and the subframe 9; and for the TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0, the subframe 1, the subframe 5, and the subframe 6.

0024In a fifth possible implementation manner, with reference to the second aspect or the first possible implementation manner to the fourth possible implementation manner, the skipping CSI-RS transmission ontransmission of a resource element occupied by the received first information that is repeatedly transmitted multiple times specifically includes: <ul id="ul0010" list-style="none" compact="compact"><li>determining a resource element occupied by the CSI-RS transmission and a subframe for the CSI-RS transmission; and</li><li>if the subframe for the CSI-RS transmission collides with the subframe for the enhanced transmission of the first information, skipping receiving the first information on the resource element occupied by the CSI-RS transmission in the determined subframe in which the enhanced transmission of the first information collides with the CSI-RS transmission.</li></ul>

0025In a sixth possible implementation manner, with reference to the second aspect or the first possible implementation manner to the fifth possible implementation manner, the skipping CSI-RS transmission ontransmission of a resource element occupied by the received first information that is repeatedly transmitted multiple times specifically includes: <ul id="ul0011" list-style="none" compact="compact"><li>determining a resource element occupied by the CSI-RS transmission; and</li><li>skipping receiving the first information on the resource element occupied by the CSI-RS transmission in the determined subframe for the enhanced transmission of the first information.</li></ul>

0026In a seventh possible implementation manner, with reference to the second aspect or the first possible implementation manner to the sixth possible implementation manner, the skipping CSI-RS transmission ontransmission of a resource element occupied by the received first information that is repeatedly transmitted multiple times specifically includes: <ul id="ul0012" list-style="none" compact="compact"><li>determining a subframe for the CSI-RS transmission; and</li><li>skipping receiving the first information in the subframe for the CSI-RS transmission.</li></ul>

0027In an eighth possible implementation manner, with reference to the second aspect or the first possible implementation manner to the seventh possible implementation manner, the determining a resource element occupied by the CSI-RS transmission specifically includes: <ul id="ul0013" list-style="none" compact="compact"><li>determining an available CSI-RS configuration according to a preset rule, or receiving signaling from a base station, where the signaling is used for notifying the available CSI-RS configuration, where the available CSI-RS configuration includes one or more CSI-RS configurations; and</li><li>determining, according to the available CSI-RS configuration, the resource element occupied by the CSI-RS transmission.</li></ul>

0028In a ninth possible implementation manner, with reference to the second aspect or the first possible implementation manner to the eighth possible implementation manner, the determining a subframe for the CSI-RS transmission specifically includes: <ul id="ul0014" list-style="none" compact="compact"><li>determining an available CSI-RS subframe configuration according to a preset rule, or receiving signaling from a base station, where the signaling is used for notifying the available CSI-RS subframe configuration, where the available CSI-RS subframe configuration includes one or more CSI-RS subframe configurations; and</li><li>determining the subframe for the CSI-RS transmission according to the available CSI-RS subframe configuration.</li></ul>

0029In a tenth possible implementation manner, with reference to the second aspect or the first possible implementation manner to the ninth possible implementation manner, the signaling includes: an MIB, a system information block SIB, Radio Resource Control RRC common signaling, RRC dedicated signaling, Media Access Control MAC signaling, or physical layer signaling.

0030According to a third aspect, an embodiment of the present invention provides an information transmission apparatus, including: <ul id="ul0015" list-style="none" compact="compact"><li>a determining module, configured to determine a subframe for enhanced transmission of first information; and</li><li>a transmission module, configured to repeatedly transmit the first information multiple times in the determined subframe for the enhanced transmission of the first information, and skip CSI-RS transmission of a resource element occupied by the enhanced transmission of the first information, where</li><li>the first information is an MIB, and a quantity of times of repeatedly transmitting the MIB in at least one radio frame is greater than one time; or the first information is an SIB 1, and a quantity of times of repeatedly transmitting the SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of repeatedly transmitting the first information in the determined subframe for the enhanced transmission of the first information is at least two times.</li></ul>

0031In a first possible implementation manner, according to the third aspect, for an FDD system, the subframe for the enhanced transmission of the first information includes one or more subframes of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a TDD system, the subframe for the enhanced transmission of the first information includes one or more subframes of the subframe 0, a subframe 1, the subframe 5, and a subframe 6.

0032In a second possible implementation manner, with reference to the third aspect or the first possible implementation manner, for the FDD system, the subframe for the enhanced transmission of the first information includes the subframe 9; or the subframe for the enhanced transmission of the first information includes the subframe 4 and the subframe 9; and for the TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0; or the subframe for the enhanced transmission of the first information includes the subframe 0 and the subframe 5.

0033In a third possible implementation manner, with reference to the third aspect or the first possible implementation manner or the second possible implementation manner, the subframe for the enhanced transmission of the first information further includes: <ul id="ul0016" list-style="none" compact="compact"><li>for the FDD system, the subframe for the enhanced transmission of the first information further includes the subframe 0 and/or the subframe 5; and</li><li>for the TDD system, the subframe for the enhanced transmission of the first information further includes the subframe 1 and/or the subframe 6.</li></ul>

0034In a fourth possible implementation manner, with reference to the third aspect or the first possible implementation manner to the third possible implementation manner, for the FDD system, the subframe for the enhanced transmission of the first information includes the subframe 0, the subframe 4, the subframe 5, and the subframe 9; and for the TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0, the subframe 1, the subframe 5, and the subframe 6.

0035In a fifth possible implementation manner, with reference to the third aspect or the first possible implementation manner to the fourth possible implementation manner, the determining module is further configured to determine a resource element occupied by the CSI-RS transmission and a subframe for the CSI-RS transmission; and the transmission module is further configured to: if the subframe for the CSI-RS transmission collides with the subframe for the enhanced transmission of the first information, skip transmitting the first information on the resource element occupied by the CSI-RS transmission in the determined subframe in which the enhanced transmission of the first information collides with the CSI-RS transmission.

0036In a sixth possible implementation manner, with reference to the third aspect or the first possible implementation manner to the fifth possible implementation manner, the determining module is further configured to determine a resource element occupied by the CSI-RS transmission; and the transmission module is further configured to skip transmitting the first information on the resource element occupied by the CSI-RS transmission in the determined subframe for the enhanced transmission of the first information.

0037In a seventh possible implementation manner, with reference to the third aspect or the first possible implementation manner to the sixth possible implementation manner, the determining module is further configured to determine a subframe for the CSI-RS transmission; and the transmission module is further configured to skip transmitting the first information in the subframe for the CSI-RS transmission.

0038In an eighth possible implementation manner, with reference to the third aspect or the first possible implementation manner to the seventh possible implementation manner, the determining module is specifically configured to determine an available CSI-RS configuration according to a preset rule, or set an available CSI-RS configuration, where the available CSI-RS configuration includes one or more CSI-RS configurations; the determining module is specifically configured to determine, according to the available CSI-RS configuration, the resource element occupied by the CSI-RS transmission; and the information transmission apparatus further includes: a notification module, configured to notify user equipment of the available CSI-RS configuration by using signaling.

0039In a ninth possible implementation manner, with reference to the third aspect or the first possible implementation manner to the eighth possible implementation manner, the determining module is specifically configured to determine an available CSI-RS subframe configuration according to a preset rule, or set an available CSI-RS subframe configuration, where the available CSI-RS subframe configuration includes one or more CSI-RS subframe configurations; the determining module is specifically configured to determine the subframe for the CSI-RS transmission according to the available CSI-RS subframe configuration; and the notification module is further configured to notify user equipment of the available CSI-RS subframe configuration by using signaling.

0040In a tenth possible implementation manner, with reference to the third aspect or the first possible implementation manner to the ninth possible implementation manner, the signaling includes: an MIB, a system information block SIB, Radio Resource Control RRC common signaling, RRC dedicated signaling, Media Access Control MAC signaling, or physical layer signaling.

0041According to a fourth aspect, an embodiment of the present invention further provides an information transmission apparatus, including: <ul id="ul0017" list-style="none" compact="compact"><li>a determining unit, configured to determine a subframe for enhanced transmission of first information; and</li><li>a receiving unit, configured to receive, in the determined subframe for the enhanced transmission of the first information, the first information that is repeatedly transmitted multiple times, and skip CSI-RS transmission of a resource element occupied by the received first information that is repeatedly transmitted multiple times, where</li><li>the first information is an MIB, and a quantity of times of receiving the repeatedly transmitted MIB in at least one radio frame is greater than one time; or the first information is an SIB 1, and a quantity of times of receiving the repeatedly transmitted SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of receiving the repeatedly transmitted first information in the determined subframe for the enhanced transmission of the first information is at least two times.</li></ul>

0042In a first possible implementation manner, according to the fourth aspect, for an FDD system, the subframe for the enhanced transmission of the first information includes one or more subframes of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a TDD system, the subframe for the enhanced transmission of the first information includes one or more subframes of the subframe 0, a subframe 1, the subframe 5, and a subframe 6.

0043In a second possible implementation manner, with reference to the fourth aspect or the first possible implementation manner, for the FDD system, the subframe for the enhanced transmission of the first information includes the subframe 9; or the subframe for the enhanced transmission of the first information includes the subframe 4 and the subframe 9; and for the TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0; or the subframe for the enhanced transmission of the first information includes the subframe 0 and the subframe 5.

0044In a third possible implementation manner, with reference to the fourth aspect or the first possible implementation manner or the second possible implementation manner, the subframe for the enhanced transmission of the first information further includes: <ul id="ul0018" list-style="none" compact="compact"><li>for the FDD system, the subframe for the enhanced transmission of the first information further includes the subframe 0 and/or the subframe 5; and</li><li>for the TDD system, the subframe for the enhanced transmission of the first information further includes the subframe 1 and/or the subframe 6.</li></ul>

0045In a fourth possible implementation manner, with reference to the fourth aspect or the first possible implementation manner to the third possible implementation manner, for the FDD system, the subframe for the enhanced transmission of the first information includes the subframe 0, the subframe 4, the subframe 5, and the subframe 9; and for the TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0, the subframe 1, the subframe 5, and the subframe 6.

0046In a fifth possible implementation manner, with reference to the fourth aspect or the first possible implementation manner to the fourth possible implementation manner, the determining unit is further configured to determine a resource element occupied by the CSI-RS transmission and a subframe for the CSI-RS transmission; and the receiving unit is further configured to: if the subframe for the CSI-RS transmission collides with the subframe for the enhanced transmission of the first information, skip receiving the first information on the resource element occupied by the CSI-RS transmission in the determined subframe in which the enhanced transmission of the first information collides with the CSI-RS transmission.

0047In a sixth possible implementation manner, with reference to the fourth aspect or the first possible implementation manner to the fifth possible implementation manner, the determining unit is further configured to determine a resource element occupied by the CSI-RS transmission; and the receiving unit is further configured to skip receiving the first information on the resource element occupied by the CSI-RS transmission in the determined subframe for the enhanced transmission of the first information.

0048In a seventh possible implementation manner, with reference to the fourth aspect or the first possible implementation manner to the sixth possible implementation manner, the determining unit is further configured to determine a subframe for the CSI-RS transmission; and the receiving unit is further configured to skip receiving the first information in the subframe for the CSI-RS transmission.

0049In an eighth possible implementation manner, with reference to the fourth aspect or the first possible implementation manner to the seventh possible implementation manner, the determining unit is specifically configured to determine an available CSI-RS configuration according to a preset rule, where the available CSI-RS configuration includes one or more CSI-RS configurations; the receiving unit is further configured to receive signaling from a base station, where the signaling is used for notifying the available CSI-RS configuration; and the determining unit is further configured to determine, according to the available CSI-RS configuration, the resource element occupied by the CSI-RS transmission.

0050In a ninth possible implementation manner, with reference to the fourth aspect or the first possible implementation manner to the eighth possible implementation manner, the determining unit is specifically configured to determine an available CSI-RS subframe configuration according to a preset rule, where the available CSI-RS subframe configuration includes one or more CSI-RS subframe configurations; the receiving unit is further configured to receive signaling from a base station, where the signaling is used for notifying the available CSI-RS subframe configuration; and the determining unit is further configured to determine the subframe for the CSI-RS transmission according to the available CSI-RS subframe configuration.

0051In a tenth possible implementation manner, with reference to the fourth aspect or the first possible implementation manner to the ninth possible implementation manner, the signaling includes: an MIB, a system information block SIB, Radio Resource Control RRC common signaling, RRC dedicated signaling, Media Access Control MAC signaling, or physical layer signaling.

0052According to a fifth aspect, an embodiment of the present invention provides a network device, including: <ul id="ul0019" list-style="none" compact="compact"><li>a processor, configured to determine a subframe for enhanced transmission of first information; and</li><li>a transmitter, configured to repeatedly transmit the first information multiple times in the determined subframe for the enhanced transmission of the first information, and skip CSI-RS transmission of a resource element occupied by the enhanced transmission of the first information, where</li><li>the first information is an MIB, and a quantity of times of repeatedly transmitting the MIB in at least one radio frame is greater than one time; or the first information is an SIB 1, and a quantity of times of repeatedly transmitting the SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of repeatedly transmitting the first information in the determined subframe for the enhanced transmission of the first information is at least two times.</li></ul>

0053In a first possible implementation manner, according to the fifth aspect, for an FDD system, the subframe for the enhanced transmission of the first information includes one or more subframes of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a TDD system, the subframe for the enhanced transmission of the first information includes one or more subframes of the subframe 0, a subframe 1, the subframe 5, and a subframe 6.

0054In a second possible implementation manner, with reference to the fifth aspect or the first possible implementation manner, for the FDD system, the subframe for the enhanced transmission of the first information includes the subframe 9; or the subframe for the enhanced transmission of the first information includes the subframe 4 and the subframe 9; and for the TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0; or the subframe for the enhanced transmission of the first information includes the subframe 0 and the subframe 5.

0055In a third possible implementation manner, with reference to the fifth aspect or the first possible implementation manner or the second possible implementation manner, the subframe for the enhanced transmission of the first information further includes: <ul id="ul0020" list-style="none" compact="compact"><li>for the FDD system, the subframe for the enhanced transmission of the first information further includes the subframe 0 and/or the subframe 5; and</li><li>for the TDD system, the subframe for the enhanced transmission of the first information further includes the subframe 1 and/or the subframe 6.</li></ul>

0056In a fourth possible implementation manner, with reference to the fifth aspect or the first possible implementation manner to the third possible implementation manner, for the FDD system, the subframe for the enhanced transmission of the first information includes the subframe 0, the subframe 4, the subframe 5, and the subframe 9; and for the TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0, the subframe 1, the subframe 5, and the subframe 6.

0057In a fifth possible implementation manner, with reference to the fifth aspect or the first possible implementation manner to the fourth possible implementation manner, the processor is further configured to determine a resource element occupied by the CSI-RS transmission and a subframe for the CSI-RS transmission; and the transmitter is further configured to: if the subframe for the CSI-RS transmission collides with the subframe for the enhanced transmission of the first information, skip transmitting the first information on the resource element occupied by the CSI-RS transmission in the determined subframe in which the enhanced transmission of the first information collides with the CSI-RS transmission.

0058In a sixth possible implementation manner, with reference to the fifth aspect or the first possible implementation manner to the fifth possible implementation manner, the processor is further configured to determine a resource element occupied by the CSI-RS transmission; and the transmitter is further configured to skip transmitting the first information on the resource element occupied by the CSI-RS transmission in the determined subframe for the enhanced transmission of the first information.

0059In a seventh possible implementation manner, with reference to the fifth aspect or the first possible implementation manner to the sixth possible implementation manner, the processor is further configured to determine a subframe for the CSI-RS transmission; and the transmitter is further configured to skip transmitting the first information in the subframe for the CSI-RS transmission.

0060In an eighth possible implementation manner, with reference to the fifth aspect or the first possible implementation manner to the seventh possible implementation manner, the processor is specifically configured to determine an available CSI-RS configuration according to a preset rule, or set an available CSI-RS configuration, where the available CSI-RS configuration includes one or more CSI-RS configurations; the processor is specifically configured to determine, according to the available CSI-RS configuration, the resource element occupied by the CSI-RS transmission; and the transmitter is further configured to notify user equipment of the available CSI-RS configuration by using signaling.

0061In a ninth possible implementation manner, with reference to the fifth aspect or the first possible implementation manner to the eighth possible implementation manner, the processor is specifically configured to determine an available CSI-RS subframe configuration according to a preset rule, or set an available CSI-RS subframe configuration, where the available CSI-RS subframe configuration includes one or more CSI-RS subframe configurations; the processor is specifically configured to determine the subframe for the CSI-RS transmission according to the available CSI-RS subframe configuration; and the transmitter is further configured to notify user equipment of the available CSI-RS subframe configuration by using signaling.

0062In a tenth possible implementation manner, with reference to the fifth aspect or the first possible implementation manner to the ninth possible implementation manner, the signaling includes: an MIB, a system information block SIB, Radio Resource Control RRC common signaling, RRC dedicated signaling, Media Access Control MAC signaling, or physical layer signaling.

0063According to a sixth aspect, an embodiment of the present invention further provides an information transmission device, including: <ul id="ul0021" list-style="none" compact="compact"><li>a processor, configured to determine a subframe for enhanced transmission of first information; and</li><li>a receiver, configured to receive, in the determined subframe for the enhanced transmission of the first information, the first information that is repeatedly transmitted multiple times, and skip CSI-RS transmission of a resource element occupied by the received first information that is repeatedly transmitted multiple times, where</li><li>the first information is an MIB, and a quantity of times of receiving the repeatedly transmitted MIB in at least one radio frame is greater than one time; or the first information is an SIB 1, and a quantity of times of receiving the repeatedly transmitted SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of receiving the repeatedly transmitted first information in the determined subframe for the enhanced transmission of the first information is at least two times.</li></ul>

0064In a first possible implementation manner, according to the sixth aspect, for an FDD system, the subframe for the enhanced transmission of the first information includes one or more subframes of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a TDD system, the subframe for the enhanced transmission of the first information includes one or more subframes of the subframe 0, a subframe 1, the subframe 5, and a subframe 6.

0065In a second possible implementation manner, with reference to the sixth aspect or the first possible implementation manner, for the FDD system, the subframe for the enhanced transmission of the first information includes the subframe 9; or the subframe for the enhanced transmission of the first information includes the subframe 4 and the subframe 9; and for the TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0; or the subframe for the enhanced transmission of the first information includes the subframe 0 and the subframe 5.

0066In a third possible implementation manner, with reference to the sixth aspect or the first possible implementation manner or the second possible implementation manner, the subframe for the enhanced transmission of the first information further includes: <ul id="ul0022" list-style="none" compact="compact"><li>for the FDD system, the subframe for the enhanced transmission of the first information further includes the subframe 0 and/or the subframe 5; and</li><li>for the TDD system, the subframe for the enhanced transmission of the first information further includes the subframe 1 and/or the subframe 6.</li></ul>

0067In a fourth possible implementation manner, with reference to the sixth aspect or the first possible implementation manner to the third possible implementation manner, for the FDD system, the subframe for the enhanced transmission of the first information includes the subframe 0, the subframe 4, the subframe 5, and the subframe 9; and for the TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0, the subframe 1, the subframe 5, and the subframe 6.

0068In a fifth possible implementation manner, with reference to the sixth aspect or the first possible implementation manner to the fourth possible implementation manner, the processor is further configured to determine a resource element occupied by the CSI-RS transmission and a subframe for the CSI-RS transmission; and the receiver is further configured to: if the subframe for the CSI-RS transmission collides with the subframe for the enhanced transmission of the first information, skip receiving the first information on the resource element occupied by the CSI-RS transmission in the determined subframe in which the enhanced transmission of the first information collides with the CSI-RS transmission.

0069In a sixth possible implementation manner, with reference to the sixth aspect or the first possible implementation manner to the fifth possible implementation manner, the processor is further configured to determine a resource element occupied by the CSI-RS transmission; and the receiver is further configured to skip receiving the first information on the resource element occupied by the CSI-RS transmission in the determined subframe for the enhanced transmission of the first information.

0070In a seventh possible implementation manner, with reference to the sixth aspect or the first possible implementation manner to the sixth possible implementation manner, the processor is further configured to determine a subframe for the CSI-RS transmission; and the receiver is further configured to skip receiving the first information in the subframe for the CSI-RS transmission.

0071In an eighth possible implementation manner, with reference to the sixth aspect or the first possible implementation manner to the seventh possible implementation manner, the processor is specifically configured to determine an available CSI-RS configuration according to a preset rule, where the available CSI-RS configuration includes one or more CSI-RS configurations; the receiver is further configured to receive signaling from a base station, where the signaling is used for notifying the available CSI-RS configuration; and the processor is further configured to determine, according to the available CSI-RS configuration, the resource element occupied by the CSI-RS transmission.

0072In a ninth possible implementation manner, with reference to the sixth aspect or the first possible implementation manner to the eighth possible implementation manner, the processor is specifically configured to determine an available CSI-RS subframe configuration according to a preset rule, where the available CSI-RS subframe configuration includes one or more CSI-RS subframe configurations; the receiver is further configured to receive signaling from a base station, where the signaling is used for notifying the available CSI-RS subframe configuration; and the processor is further configured to determine the subframe for the CSI-RS transmission according to the available CSI-RS subframe configuration.

0073In a tenth possible implementation manner, with reference to the sixth aspect or the first possible implementation manner to the ninth possible implementation manner, the signaling includes: an MIB, a system information block SIB, Radio Resource Control RRC common signaling, RRC dedicated signaling, Media Access Control MAC signaling, or physical layer signaling.

0074According to a seventh aspect, an embodiment of the present invention provides an information transmission system, including the base station having any feature described above and the user equipment having any feature described above.

0075According to an eighth aspect, an embodiment of the present invention provides an information transmission method, where the method includes: <ul id="ul0023" list-style="none" compact="compact"><li>determining a subframe for enhanced transmission of first information, where the first information is a master information block, or the first information is a system information block SIB including a time division duplex TDD configuration, or the first information is an SIB including a multicast-broadcast single-frequency network MBSFN subframe configuration; and</li><li>performing the enhanced transmission of the first information in the determined subframe for the enhanced transmission of the first information.</li></ul>

0076In a first possible implementation manner, according to the eighth aspect, the performing the enhanced transmission of the first information in the determined subframe for the enhanced transmission of the first information specifically includes: <ul id="ul0024" list-style="none" compact="compact"><li>if the first information is a master information block, performing the enhanced transmission of the master information block in at least one radio frame a quantity of times that is greater than one time; or</li><li>if the first information is an SIB including a TDD configuration, performing the enhanced transmission of the SIB in at least two consecutive radio frames a quantity of times that is greater than one time; or</li><li>if the first information is an SIB including an MBSFN subframe configuration, performing the enhanced transmission of the SIB in the determined subframe for the enhanced transmission of the first information a quantity of times that is at least two times.</li></ul>

0077In a second possible implementation manner, with reference to the eighth aspect or the first possible implementation manner, for a frequency division duplex FDD system or a half frequency division duplex Half FDD system, the subframe for the enhanced transmission of the first information includes one or more of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0 and/or the subframe 5.

0078In a third possible implementation manner, with reference to the eighth aspect or the first possible implementation manner or the second possible implementation manner, for the TDD system, if the first information is an SIB including an MBSFN subframe configuration and a subframe 6 is not a special subframe, the subframe for the enhanced transmission of the first information further includes the subframe 6.

0079In a fourth possible implementation manner, with reference to the eighth aspect or the first possible implementation manner to the third possible implementation manner, the subframe 0 is a subframe 0 in each radio frame in at least one radio frame, or a subframe 0 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 0 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 4 is a subframe 4 in each radio frame in at least one radio frame, or a subframe 4 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 4 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 5 is a subframe 5 in each radio frame in at least one radio frame, or a subframe 5 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 5 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 6 is a subframe 6 in each radio frame in at least one radio frame, or a subframe 6 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 6 in each odd-numbered radio frame in at least one odd-numbered radio frame; and the subframe 9 is a subframe 9 in each radio frame in at least one radio frame, or a subframe 9 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 9 in each odd-numbered radio frame in at least one odd-numbered radio frame.

0080In a fifth possible implementation manner, with reference to the eighth aspect or the first possible implementation manner to the fourth possible implementation manner, when the enhanced transmission of the first information is scheduled based on a control channel, additional enhanced transmission of a paging message and/or a random access response message is not performed in the determined subframe for the enhanced transmission of the first information; and when the enhanced transmission of the first information is not scheduled based on a control channel, on a small-bandwidth carrier, the additional enhanced transmission of the paging message and/or the random access response message is not performed in the determined subframe for the enhanced transmission of the first information, where the small-bandwidth carrier includes at least a carrier of 1.4 MHz and/or a carrier of 3 MHz.

0081In a sixth possible implementation manner, with reference to the eighth aspect or the first possible implementation manner to the fifth possible implementation manner, if the first information is an SIB including a TDD configuration, the enhanced transmission of the first information is after enhanced transmission of a master information block, and a preset first time offset exists between the enhanced transmission of the first information and the enhanced transmission of the master information block; and if the first information is an SIB including an MBSFN subframe configuration, the enhanced transmission of the first information is after enhanced transmission of an SIB including a TDD configuration, and a preset second time offset exists between the enhanced transmission of the first information and the enhanced transmission of the SIB including the TDD configuration.

0082In a seventh possible implementation manner, with reference to the eighth aspect or the first possible implementation manner to the sixth possible implementation manner, the method further includes: determining a redundancy version RV, in a (rep_index + 1)^th time of enhanced transmission, of the first information, where <maths id="math0001"><math display="block"><mrow><mi>RV index</mi><mo>=</mo><mi>ceil</mi><mrow><mfenced><msub><mrow><mmultiscripts><mrow><mo>/</mo></mrow><mprescripts /><none /><mn>3</mn></mmultiscripts></mrow><mn>2</mn></msub><mo>*</mo><mfenced open="{" close="}"><mrow><mi>rep_index mod</mi><mspace width="1em" /></mrow><mn>4</mn></mfenced></mfenced><mspace width="1em" /></mrow><mi>mod</mi><mspace width="1em" /><mn>4</mn><mo>,</mo></mrow></math><img file="EP3852284A1_D0001.tif" /></maths> ceil(<i>x</i>) is a round-up function, rep_index is a number of a quantity of times of the enhanced transmission of the first information, and mod is a modulo operation; or the RV is determined in an order of 0, 2, 3, and 1 according to an index of a quantity of times of the enhanced transmission.

0083In an eighth possible implementation manner, with reference to the eighth aspect or the first possible implementation manner to the seventh possible implementation manner, the subframe for the enhanced transmission of the first information includes any one of or a combination of the following: <ul id="ul0025" list-style="none" compact="compact"><li>the subframe for the enhanced transmission of the first information is a subframe in an enhanced transmission opportunity of the first information or a subframe in an enhanced transmission bundle of the first information;</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one radio frame; and</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one system information window.</li></ul>

0084According to a ninth aspect, an embodiment of the present invention further provides an information transmission method, where the method includes: <ul id="ul0026" list-style="none" compact="compact"><li>determining a subframe for enhanced transmission of first information, where the first information is a master information block, or the first information is an SIB including a TDD configuration, or the first information is an SIB including an MBSFN subframe configuration; and</li><li>receiving the first information in the determined subframe for the enhanced transmission of the first information.</li></ul>

0085In a first possible implementation manner, according to the ninth aspect, the receiving the first information in the determined subframe for the enhanced transmission of the first information specifically includes: <ul id="ul0027" list-style="none" compact="compact"><li>if the first information is a master information block, receiving the master information block in at least one radio frame a quantity of times that is greater than one time; or</li><li>if the first information is an SIB including a TDD configuration, receiving the SIB in at least two consecutive radio frames a quantity of times that is greater than one time; or</li><li>if the first information is an SIB including an MBSFN subframe configuration, receiving the SIB in the determined subframe for the enhanced transmission of the first information a quantity of times that is at least two times.</li></ul>

0086In a second possible implementation manner, with reference to the ninth aspect or the first possible implementation manner, for an FDD system or a Half FDD system, the subframe for the enhanced transmission of the first information includes one or more of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0 and/or the subframe 5.

0087In a third possible implementation manner, with reference to the ninth aspect or the first possible implementation manner or the second possible implementation manner, for the TDD system, if the first information is an SIB including an MBSFN subframe configuration and a subframe 6 is not a special subframe, the subframe for the enhanced transmission of the first information further includes the subframe 6.

0088In a fourth possible implementation manner, with reference to the ninth aspect or the first possible implementation manner to the third possible implementation manner, the subframe 0 is a subframe 0 in each radio frame in at least one radio frame, or a subframe 0 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 0 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 4 is a subframe 4 in each radio frame in at least one radio frame, or a subframe 4 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 4 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 5 is a subframe 5 in each radio frame in at least one radio frame, or a subframe 5 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 5 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 6 is a subframe 6 in each radio frame in at least one radio frame, or a subframe 6 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 6 in each odd-numbered radio frame in at least one odd-numbered radio frame; and the subframe 9 is a subframe 9 in each radio frame in at least one radio frame, or a subframe 9 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 9 in each odd-numbered radio frame in at least one odd-numbered radio frame.

0089In a fifth possible implementation manner, with reference to the ninth aspect or the first possible implementation manner to the fourth possible implementation manner, when the enhanced transmission of the first information is scheduled based on a control channel, a paging message and/or a random access response message on which additional enhanced transmission is performed is not received in the determined subframe for the enhanced transmission of the first information; and when the enhanced transmission of the first information is not scheduled based on a control channel, on a small-bandwidth carrier, the paging message and/or the random access response message on which the additional enhanced transmission is performed is not received in the determined subframe for the enhanced transmission of the first information, where the small-bandwidth carrier includes at least a carrier of 1.4 MHz and/or a carrier of 3 MHz.

0090In a sixth possible implementation manner, with reference to the ninth aspect or the first possible implementation manner to the fifth possible implementation manner, if the first information is an SIB including a TDD configuration, the receiving of the first information is after receiving of a master information block, and a preset first time offset exists between the receiving of the first information and the receiving of the master information block; and if the first information is an SIB including an MBSFN subframe configuration, the receiving of the first information is after receiving of an SIB including a TDD configuration, and a preset second time offset exists between the receiving of the first information and the receiving of the SIB including the TDD configuration.

0091In a seventh possible implementation manner, with reference to the ninth aspect or the first possible implementation manner to the sixth possible implementation manner, the method further includes: determining a redundancy version RV, in a (rep_index + 1)^th time of enhanced transmission, of the first information, where <maths id="math0002"><math display="block"><mrow><mi>RV index</mi><mo>=</mo><mi>ceil</mi><mfenced><msub><mrow><mmultiscripts><mrow><mo>/</mo></mrow><mprescripts /><none /><mn>3</mn></mmultiscripts></mrow><mn>2</mn></msub><mo>*</mo><mfenced open="{" close="}"><mrow><mi>rep_index mod</mi><mspace width="1em" /></mrow><mn>4</mn></mfenced></mfenced><mspace width="1em" /><mi>mod</mi><mspace width="1em" /><mn>4</mn><mo>,</mo></mrow></math><img file="EP3852284A1_D0002.tif" /></maths> ceil(<i>x</i>) is a round-up function, rep_index is a number of a quantity of times of the enhanced transmission of the first information, and mod is a modulo operation; or the RV is determined in an order of 0, 2, 3, and 1 according to an index of a quantity of times of the enhanced transmission.

0092In an eighth possible implementation manner, with reference to the ninth aspect or the first possible implementation manner to the seventh possible implementation manner, the subframe for the enhanced transmission of the first information includes any one of or a combination of the following: <ul id="ul0028" list-style="none" compact="compact"><li>the subframe for the enhanced transmission of the first information is a subframe in an enhanced transmission opportunity of the first information or a subframe in an enhanced transmission bundle of the first information;</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one radio frame; and</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one system information window.</li></ul>

0093According to a tenth aspect, an embodiment of the present invention provides an information transmission apparatus, including: <ul id="ul0029" list-style="none" compact="compact"><li>a determining module, configured to determine a subframe for enhanced transmission of first information, where the first information is a master information block, or the first information is a system information block SIB including a time division duplex TDD configuration, or the first information is an SIB including a multicast-broadcast single-frequency network MBSFN subframe configuration; and</li><li>a sending module, configured to: after the determining module determines the subframe for the enhanced transmission of the first information, perform the enhanced transmission of the first information in the determined subframe for the enhanced transmission of the first information.</li></ul>

0094In a first possible implementation manner, according to the tenth aspect, the sending module is specifically configured to: if the first information is a master information block, perform the enhanced transmission of the master information block in at least one radio frame a quantity of times that is greater than one time; if the first information is an SIB including a TDD configuration, perform the enhanced transmission of the SIB in at least two consecutive radio frames a quantity of times that is greater than one time; or if the first information is an SIB including an MBSFN subframe configuration, perform the enhanced transmission of the SIB in the determined subframe for the enhanced transmission of the first information a quantity of times that is at least two times.

0095In a second possible implementation manner, with reference to the tenth aspect or the first possible implementation manner, for a frequency division duplex FDD system or a half frequency division duplex Half FDD system, the subframe for the enhanced transmission of the first information includes one or more of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0 and/or the subframe 5.

0096In a third possible implementation manner, with reference to the tenth aspect or the first possible implementation manner or the second possible implementation manner, for the TDD system, if the first information is an SIB including an MBSFN subframe configuration and a subframe 6 is not a special subframe, the subframe for the enhanced transmission of the first information further includes the subframe 6.

0097In a fourth possible implementation manner, with reference to the tenth aspect or the first possible implementation manner to the third possible implementation manner, the subframe 0 is a subframe 0 in each radio frame in at least one radio frame, or a subframe 0 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 0 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 4 is a subframe 4 in each radio frame in at least one radio frame, or a subframe 4 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 4 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 5 is a subframe 5 in each radio frame in at least one radio frame, or a subframe 5 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 5 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 6 is a subframe 6 in each radio frame in at least one radio frame, or a subframe 6 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 6 in each odd-numbered radio frame in at least one odd-numbered radio frame; and the subframe 9 is a subframe 9 in each radio frame in at least one radio frame, or a subframe 9 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 9 in each odd-numbered radio frame in at least one odd-numbered radio frame.

0098In a fifth possible implementation manner, with reference to the tenth aspect or the first possible implementation manner to the fourth possible implementation manner, when the enhanced transmission of the first information is scheduled based on a control channel, additional enhanced transmission of a paging message and/or a random access response message is not performed in the determined subframe for the enhanced transmission of the first information; and when the enhanced transmission of the first information is not scheduled based on a control channel, on a small-bandwidth carrier, the additional enhanced transmission of the paging message and/or the random access response message is not performed in the determined subframe for the enhanced transmission of the first information, where the small-bandwidth carrier includes at least a carrier of 1.4 MHz and/or a carrier of 3 MHz.

0099In a sixth possible implementation manner, with reference to the tenth aspect or the first possible implementation manner to the fifth possible implementation manner, if the first information is an SIB including a TDD configuration, the enhanced transmission of the first information is after enhanced transmission of a master information block, and a preset first time offset exists between the enhanced transmission of the first information and the enhanced transmission of the master information block; and if the first information is an SIB including an MBSFN subframe configuration, the enhanced transmission of the first information is after enhanced transmission of an SIB including a TDD configuration, and a preset second time offset exists between the enhanced transmission of the first information and the enhanced transmission of the SIB including the TDD configuration.

0100In a seventh possible implementation manner, with reference to the tenth aspect or the first possible implementation manner to the sixth possible implementation manner, the determining module is further configured to determine a redundancy version RV, in a (rep_index+1)^th time of enhanced transmission, of the first information, where <maths id="math0003"><math display="block"><mrow><mi>RV index</mi><mo>=</mo><mi>ceil</mi><mfenced><msub><mrow><mmultiscripts><mrow><mo>/</mo></mrow><mprescripts /><none /><mn>3</mn></mmultiscripts></mrow><mn>2</mn></msub><mo>*</mo><mfenced open="{" close="}"><mrow><mi>rep_index mod</mi><mspace width="1em" /></mrow><mn>4</mn></mfenced></mfenced><mspace width="1em" /><mi>mod</mi><mspace width="1em" /><mn>4</mn><mo>,</mo></mrow></math><img file="EP3852284A1_D0003.tif" /></maths> ceil(<i>x</i>) is a round-up function, rep_index is a number of a quantity of times of the enhanced transmission of the first information, and mod is a modulo operation; or the RV is determined in an order of 0, 2, 3, and 1 according to an index of a quantity of times of the enhanced transmission.

0101In an eighth possible implementation manner, with reference to the tenth aspect or the first possible implementation manner to the seventh possible implementation manner, the subframe for the enhanced transmission of the first information includes any one of or a combination of the following: <ul id="ul0030" list-style="none" compact="compact"><li>the subframe for the enhanced transmission of the first information is a subframe in an enhanced transmission opportunity of the first information or a subframe in an enhanced transmission bundle of the first information;</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one radio frame; and</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one system information window.</li></ul>

0102According to an eleventh aspect, an embodiment of the present invention further provides an information transmission apparatus, including: <ul id="ul0031" list-style="none" compact="compact"><li>a determining module, configured to determine a subframe for enhanced transmission of first information, where the first information is a master information block, or the first information is an SIB including a TDD configuration, or the first information is an SIB including an MBSFN subframe configuration; and</li><li>a receiving module, configured to: after the determining module determines the subframe for the enhanced transmission of the first information, receive the first information in the determined subframe for the enhanced transmission of the first information.</li></ul>

0103In a first possible implementation manner, according to the eleventh aspect, the receiving module is specifically configured to: if the first information is a master information block, receive the master information block in at least one radio frame a quantity of times that is greater than one time; if the first information is an SIB including a TDD configuration, receive the SIB in at least two consecutive radio frames a quantity of times that is greater than one time; or if the first information is an SIB including an MBSFN subframe configuration, receive the SIB in the determined subframe for the enhanced transmission of the first information a quantity of times that is at least two times.

0104In a second possible implementation manner, with reference to the eleventh aspect or the first possible implementation manner, for an FDD system or a Half FDD system, the subframe for the enhanced transmission of the first information includes one or more of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0 and/or the subframe 5.

0105In a third possible implementation manner, with reference to the eleventh aspect or the first possible implementation manner or the second possible implementation manner, for the TDD system, if the first information is an SIB including an MBSFN subframe configuration and a subframe 6 is not a special subframe, the subframe for the enhanced transmission of the first information further includes the subframe 6.

0106In a fourth possible implementation manner, with reference to the eleventh aspect or the first possible implementation manner to the third possible implementation manner, the subframe 0 is a subframe 0 in each radio frame in at least one radio frame, or a subframe 0 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 0 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 4 is a subframe 4 in each radio frame in at least one radio frame, or a subframe 4 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 4 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 5 is a subframe 5 in each radio frame in at least one radio frame, or a subframe 5 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 5 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 6 is a subframe 6 in each radio frame in at least one radio frame, or a subframe 6 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 6 in each odd-numbered radio frame in at least one odd-numbered radio frame; and the subframe 9 is a subframe 9 in each radio frame in at least one radio frame, or a subframe 9 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 9 in each odd-numbered radio frame in at least one odd-numbered radio frame.

0107In a fifth possible implementation manner, with reference to the eleventh aspect or the first possible implementation manner to the fourth possible implementation manner, when the enhanced transmission of the first information is scheduled based on a control channel, a paging message and/or a random access response message on which additional enhanced transmission is performed is not received in the determined subframe for the enhanced transmission of the first information; and when the enhanced transmission of the first information is not scheduled based on a control channel, on a small-bandwidth carrier, the paging message and/or the random access response message on which the additional enhanced transmission is performed is not received in the determined subframe for the enhanced transmission of the first information, where the small-bandwidth carrier includes at least a carrier of 1.4 MHz and/or a carrier of 3 MHz.

0108In a sixth possible implementation manner, with reference to the eleventh aspect or the first possible implementation manner to the fifth possible implementation manner, if the first information is an SIB including a TDD configuration, the receiving of the first information is after receiving of a master information block, and a preset first time offset exists between the receiving of the first information and the receiving of the master information block; and if the first information is an SIB including an MBSFN subframe configuration, the receiving of the first information is after receiving of an SIB including a TDD configuration, and a preset second time offset exists between the receiving of the first information and the receiving of the SIB including the TDD configuration.

0109In a seventh possible implementation manner, with reference to the eleventh aspect or the first possible implementation manner to the sixth possible implementation manner, the determining module is further configured to determine a redundancy version RV, in a (rep_index+1)^th time of enhanced transmission, of the first information, where <maths id="math0004"><math display="block"><mrow><mi>RV index</mi><mo>=</mo><mi>ceil</mi><mfenced><msub><mrow><mmultiscripts><mrow><mo>/</mo></mrow><mprescripts /><none /><mn>3</mn></mmultiscripts></mrow><mn>2</mn></msub><mo>*</mo><mfenced open="{" close="}"><mrow><mi>rep_index mod</mi><mspace width="1em" /></mrow><mn>4</mn></mfenced></mfenced><mspace width="1em" /><mi>mod</mi><mspace width="1em" /><mn>4</mn><mo>,</mo></mrow></math><img file="EP3852284A1_D0004.tif" /></maths> ceil(<i>x</i>) is a round-up function, rep_index is a number of a quantity of times of the enhanced transmission of the first information, and mod is a modulo operation; or the RV is determined in an order of 0, 2, 3, and 1 according to an index of a quantity of times of the enhanced transmission.

0110In an eighth possible implementation manner, with reference to the eleventh aspect or the first possible implementation manner to the seventh possible implementation manner, the subframe for the enhanced transmission of the first information includes any one of or a combination of the following: <ul id="ul0032" list-style="none" compact="compact"><li>the subframe for the enhanced transmission of the first information is a subframe in an enhanced transmission opportunity of the first information or a subframe in an enhanced transmission bundle of the first information;</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one radio frame; and</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one system information window.</li></ul>

0111According to a twelfth aspect, an embodiment of the present invention provides a network device, including: <ul id="ul0033" list-style="none" compact="compact"><li>a processor, configured to determine a subframe for enhanced transmission of first information, where the first information is a master information block, or the first information is a system information block SIB including a time division duplex TDD configuration, or the first information is an SIB including a multicast-broadcast single-frequency network MBSFN subframe configuration; and</li><li>a transmitter, configured to: after the processor determines the subframe for the enhanced transmission of the first information, perform the enhanced transmission of the first information in the determined subframe for the enhanced transmission of the first information.</li></ul>

0112In a first possible implementation manner, according to the twelfth aspect, the transmitter is specifically configured to: if the first information is a master information block, perform the enhanced transmission of the master information block in at least one radio frame a quantity of times that is greater than one time; if the first information is an SIB including a TDD configuration, perform the enhanced transmission of the SIB in at least two consecutive radio frames a quantity of times that is greater than one time; or if the first information is an SIB including an MBSFN subframe configuration, perform the enhanced transmission of the SIB in the determined subframe for the enhanced transmission of the first information a quantity of times that is at least two times.

0113In a second possible implementation manner, with reference to the twelfth aspect or the first possible implementation manner, for a frequency division duplex FDD system or a half frequency division duplex Half FDD system, the subframe for the enhanced transmission of the first information includes one or more of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0 and/or the subframe 5.

0114In a third possible implementation manner, with reference to the twelfth aspect or the first possible implementation manner or the second possible implementation manner, for the TDD system, if the first information is an SIB including an MBSFN subframe configuration and a subframe 6 is not a special subframe, the subframe for the enhanced transmission of the first information further includes the subframe 6.

0115In a fourth possible implementation manner, with reference to the twelfth aspect or the first possible implementation manner to the third possible implementation manner, the subframe 0 is a subframe 0 in each radio frame in at least one radio frame, or a subframe 0 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 0 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 4 is a subframe 4 in each radio frame in at least one radio frame, or a subframe 4 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 4 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 5 is a subframe 5 in each radio frame in at least one radio frame, or a subframe 5 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 5 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 6 is a subframe 6 in each radio frame in at least one radio frame, or a subframe 6 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 6 in each odd-numbered radio frame in at least one odd-numbered radio frame; and the subframe 9 is a subframe 9 in each radio frame in at least one radio frame, or a subframe 9 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 9 in each odd-numbered radio frame in at least one odd-numbered radio frame.

0116In a fifth possible implementation manner, with reference to the twelfth aspect or the first possible implementation manner to the fourth possible implementation manner, when the enhanced transmission of the first information is scheduled based on a control channel, additional enhanced transmission of a paging message and/or a random access response message is not performed in the determined subframe for the enhanced transmission of the first information; and when the enhanced transmission of the first information is not scheduled based on a control channel, on a small-bandwidth carrier, the additional enhanced transmission of the paging message and/or the random access response message is not performed in the determined subframe for the enhanced transmission of the first information, where the small-bandwidth carrier includes at least a carrier of 1.4 MHz and/or a carrier of 3 MHz.

0117In a sixth possible implementation manner, with reference to the twelfth aspect or the first possible implementation manner to the fifth possible implementation manner, if the first information is an SIB including a TDD configuration, the enhanced transmission of the first information is after enhanced transmission of a master information block, and a preset first time offset exists between the enhanced transmission of the first information and the enhanced transmission of the master information block; and if the first information is an SIB including an MBSFN subframe configuration, the enhanced transmission of the first information is after enhanced transmission of an SIB including a TDD configuration, and a preset second time offset exists between the enhanced transmission of the first information and the enhanced transmission of the SIB including the TDD configuration.

0118In a seventh possible implementation manner, with reference to the twelfth aspect or the first possible implementation manner to the sixth possible implementation manner, the processor is further configured to determine a redundancy version RV, in a (rep_index+1)^th time of enhanced transmission, of the first information, where <maths id="math0005"><math display="block"><mrow><mi>RV index</mi><mo>=</mo><mi>ceil</mi><mfenced><msub><mrow><mmultiscripts><mrow><mo>/</mo></mrow><mprescripts /><none /><mn>3</mn></mmultiscripts></mrow><mn>2</mn></msub><mo>*</mo><mfenced open="{" close="}"><mrow><mi>rep_index mod</mi><mspace width="1em" /></mrow><mn>4</mn></mfenced></mfenced><mspace width="1em" /><mi>mod</mi><mspace width="1em" /><mn>4</mn><mo>,</mo></mrow></math><img file="EP3852284A1_D0005.tif" /></maths> ceil(<i>x</i>) is a round-up function, rep_index is a number of a quantity of times of the enhanced transmission of the first information, and mod is a modulo operation; or the RV is determined in an order of 0, 2, 3, and 1 according to an index of a quantity of times of the enhanced transmission.

0119In an eighth possible implementation manner, with reference to the twelfth aspect or the first possible implementation manner to the seventh possible implementation manner, the subframe for the enhanced transmission of the first information includes any one of or a combination of the following: <ul id="ul0034" list-style="none" compact="compact"><li>the subframe for the enhanced transmission of the first information is a subframe in an enhanced transmission opportunity of the first information or a subframe in an enhanced transmission bundle of the first information;</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one radio frame; and</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one system information window.</li></ul>

0120According to a thirteenth aspect, an embodiment of the present invention further provides an information transmission device, including: <ul id="ul0035" list-style="none" compact="compact"><li>a processor, configured to determine a subframe for enhanced transmission of first information, where the first information is a master information block, or the first information is an SIB including a TDD configuration, or the first information is an SIB including an MBSFN subframe configuration; and</li><li>a receiver, configured to: after the processor determines the subframe for the enhanced transmission of the first information, receive the first information in the determined subframe for the enhanced transmission of the first information.</li></ul>

0121In a first possible implementation manner, according to the thirteenth aspect, the receiver is specifically configured to: if the first information is a master information block, receive the master information block in at least one radio frame a quantity of times that is greater than one time; if the first information is an SIB including a TDD configuration, receive the SIB in at least two consecutive radio frames a quantity of times that is greater than one time; or if the first information is an SIB including an MBSFN subframe configuration, receive the SIB in the determined subframe for the enhanced transmission of the first information a quantity of times that is at least two times.

0122In a second possible implementation manner, with reference to the thirteenth aspect or the first possible implementation manner, for an FDD system or a Half FDD system, the subframe for the enhanced transmission of the first information includes one or more of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0 and/or the subframe 5.

0123In a third possible implementation manner, with reference to the thirteenth aspect or the first possible implementation manner or the second possible implementation manner, for the TDD system, if the first information is an SIB including an MBSFN subframe configuration and a subframe 6 is not a special subframe, the subframe for the enhanced transmission of the first information further includes the subframe 6.

0124In a fourth possible implementation manner, with reference to the thirteenth aspect or the first possible implementation manner to the third possible implementation manner, the subframe 0 is a subframe 0 in each radio frame in at least one radio frame, or a subframe 0 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 0 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 4 is a subframe 4 in each radio frame in at least one radio frame, or a subframe 4 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 4 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 5 is a subframe 5 in each radio frame in at least one radio frame, or a subframe 5 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 5 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 6 is a subframe 6 in each radio frame in at least one radio frame, or a subframe 6 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 6 in each odd-numbered radio frame in at least one odd-numbered radio frame; and the subframe 9 is a subframe 9 in each radio frame in at least one radio frame, or a subframe 9 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 9 in each odd-numbered radio frame in at least one odd-numbered radio frame.

0125In a fifth possible implementation manner, with reference to the thirteenth aspect or the first possible implementation manner to the fourth possible implementation manner, when the enhanced transmission of the first information is scheduled based on a control channel, a paging message and/or a random access response message on which additional enhanced transmission is performed is not received in the determined subframe for the enhanced transmission of the first information; and when the enhanced transmission of the first information is not scheduled based on a control channel, on a small-bandwidth carrier, the paging message and/or the random access response message on which the additional enhanced transmission is performed is not received in the determined subframe for the enhanced transmission of the first information, where the small-bandwidth carrier includes at least a carrier of 1.4 MHz and/or a carrier of 3 MHz.

0126In a sixth possible implementation manner, with reference to the thirteenth aspect or the first possible implementation manner to the fifth possible implementation manner, if the first information is an SIB including a TDD configuration, the receiving of the first information is after receiving of a master information block, and a preset first time offset exists between the receiving of the first information and the receiving of the master information block; and if the first information is an SIB including an MBSFN subframe configuration, the receiving of the first information is after receiving of an SIB including a TDD configuration, and a preset second time offset exists between the receiving of the first information and the receiving of the SIB including the TDD configuration.

0127In a seventh possible implementation manner, with reference to the thirteenth aspect or the first possible implementation manner to the sixth possible implementation manner, the processor is further configured to determine a redundancy version RV, in a (rep_index+1)^th time of enhanced transmission, of the first information, where <maths id="math0006"><math display="block"><mrow><mi>RV index</mi><mo>=</mo><mi>ceil</mi><mfenced><msub><mrow><mmultiscripts><mrow><mo>/</mo></mrow><mprescripts /><none /><mn>3</mn></mmultiscripts></mrow><mn>2</mn></msub><mo>*</mo><mfenced open="{" close="}"><mrow><mi>rep_index mod</mi><mspace width="1em" /></mrow><mn>4</mn></mfenced></mfenced><mspace width="1em" /><mi>mod</mi><mspace width="1em" /><mn>4</mn><mo>,</mo></mrow></math><img file="EP3852284A1_D0006.tif" /></maths> ceil(<i>x</i>) is a round-up function, rep_index is a number of a quantity of times of the enhanced transmission of the first information, and mod is a modulo operation; or the RV is determined in an order of 0, 2, 3, and 1 according to an index of a quantity of times of the enhanced transmission.

0128In an eighth possible implementation manner, with reference to the thirteenth aspect or the first possible implementation manner to the seventh possible implementation manner, the subframe for the enhanced transmission of the first information includes any one of or a combination of the following: <ul id="ul0036" list-style="none" compact="compact"><li>the subframe for the enhanced transmission of the first information is a subframe in an enhanced transmission opportunity of the first information or a subframe in an enhanced transmission bundle of the first information;</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one radio frame; and</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one system information window.</li></ul>

0129According to a fourteenth aspect, an embodiment of the present invention provides an information transmission system, including the network device having any feature described above and the information transmission device having any feature described above.

0130According to the information transmission method, apparatus, and system provided in the embodiments of the present invention, a subframe for enhanced transmission of first information is determined, where the first information is a master information block, or the first information is an SIB including a TDD configuration, or the first information is an SIB including an MBSFN subframe configuration, and the enhanced transmission of the first information is performed in the determined subframe for the enhanced transmission of the first information. According to the solutions, the subframe used in the enhanced transmission of the first information can be determined, improving transmission reliability of the first information.

BRIEF DESCRIPTION OF DRAWINGS

0131To describe the technical solutions in the embodiments of the present invention or in the prior art more clearly, the following briefly describes the accompanying drawings required for describing the embodiments or the prior art. Apparently, the accompanying drawings in the following description show merely some embodiments of the present invention, and a person of ordinary skill in the art may still derive other drawings from these accompanying drawings without creative efforts. <ul id="ul0037" list-style="none" compact="compact"><li><figref idref="f0001">FIG. 1</figref> is a first schematic flowchart of an information transmission method according to Embodiment 1 of the present invention;</li><li><figref idref="f0001">FIG. 2</figref> is a second schematic flowchart of an information transmission method according to Embodiment 2 of the present invention;</li><li><figref idref="f0002">FIG. 3</figref> is a third schematic flowchart of an information transmission method according to Embodiment 3 of the present invention;</li><li><figref idref="f0002">FIG. 4</figref> is a schematic flowchart of determining, by a base station, a resource element occupied by CSI-RS transmission according to Embodiment 3 of the present invention;</li><li><figref idref="f0003">FIG. 5</figref> is a schematic flowchart of determining, by a base station, a subframe for CSI-RS transmission according to Embodiment 3 of the present invention;</li><li><figref idref="f0003">FIG. 6</figref> is a fourth schematic flowchart of an information transmission method according to Embodiment 4 of the present invention;</li><li><figref idref="f0004">FIG. 7</figref> is a fifth schematic flowchart of an information transmission method according to Embodiment 5 of the present invention;</li><li><figref idref="f0004">FIG. 8</figref> is a first schematic flowchart of another information transmission method according to Embodiment 6 of the present invention;</li><li><figref idref="f0005">FIG. 9</figref> is a second schematic flowchart of another information transmission method according to Embodiment 7 of the present invention;</li><li><figref idref="f0005">FIG. 10</figref> is a third schematic flowchart of another information transmission method according to Embodiment 8 of the present invention;</li><li><figref idref="f0006">FIG. 11</figref> is a schematic flowchart of determining, by user equipment, a resource element occupied by CSI-RS transmission according to Embodiment 8 of the present invention;</li><li><figref idref="f0006">FIG. 12</figref> is a schematic flowchart of determining, by user equipment, a subframe for CSI-RS transmission according to Embodiment 8 of the present invention;</li><li><figref idref="f0007">FIG. 13</figref> is a fourth schematic flowchart of another information transmission method according to Embodiment 9 of the present invention;</li><li><figref idref="f0008">FIG. 14</figref> is a fifth schematic flowchart of another information transmission method according to Embodiment 10 of the present invention;</li><li><figref idref="f0008">FIG. 15</figref> is a first schematic structural diagram of an information transmission apparatus according to Embodiment 11 of the present invention;</li><li><figref idref="f0009">FIG. 16</figref> is a second schematic structural diagram of an information transmission apparatus according to Embodiment 11 of the present invention;</li><li><figref idref="f0009">FIG. 17</figref> is a schematic structural diagram of another information transmission apparatus according to Embodiment 12 of the present invention;</li><li><figref idref="f0010">FIG. 18</figref> is a schematic structural diagram of a network device according to Embodiment 13 of the present invention;</li><li><figref idref="f0010">FIG. 19</figref> is a schematic structural diagram of an information transmission device according to Embodiment 14 of the present invention;</li><li><figref idref="f0010">FIG. 20</figref> is a schematic flowchart of an information transmission method according to Embodiment 16 of the present invention;</li><li><figref idref="f0011">FIG. 21</figref> is a schematic flowchart of an information transmission method according to Embodiment 17 of the present invention;</li><li><figref idref="f0011">FIG. 22</figref> is a schematic flowchart of an information transmission method according to Embodiment 18 of the present invention;</li><li><figref idref="f0012">FIG. 23</figref> is a schematic flowchart of an information transmission method according to Embodiment 19 of the present invention;</li><li><figref idref="f0012">FIG. 24</figref> is a schematic structural diagram of an information transmission apparatus according to Embodiment 20 of the present invention;</li><li><figref idref="f0013">FIG. 25</figref> is a schematic structural diagram of an information transmission apparatus according to Embodiment 21 of the present invention;</li><li><figref idref="f0013">FIG. 26</figref> is a schematic structural diagram of a network device according to Embodiment 22 of the present invention; and</li><li><figref idref="f0014">FIG. 27</figref> is a schematic structural diagram of an information transmission device according to Embodiment 23 of the present invention.</li></ul>

DESCRIPTION OF EMBODIMENTS

0132The following clearly and completely describes the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are merely some but not all of the embodiments of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

0133A network device described in the embodiments of the present invention may be a base station, or may be a network device such as a router, a gateway, or a mobility management entity. An information transmission device described in the embodiments of the present invention may be user equipment, or may be another device that can be configured to transmit information. The present invention sets no limitations thereto. For the present invention, specific embodiments of the present invention are described by using an example in which the network device is a base station and the information transmission device is user equipment. In addition, enhanced transmission mentioned in the present invention may be one or more types of transmission in repeated transmission, spread spectrum transmission, transmission time interval bundling transmission, power increased transmission, or retransmission, which is not limited in the present invention.

Embodiment 1

0134This embodiment of the present invention provides an information transmission method. As shown in <figref idref="f0001">FIG. 1</figref>, the method includes:

0135S101: Abase station determines a subframe for enhanced transmission of first information.

0136Coverage enhancement needs to be performed on coverage of an LTE network, so as to ensure that user equipment can reliably communicate with the base station when the user equipment is in a basement or channel quality is poor. In an existing LTE or LTE-A system, a PBCH for carrying one time of transmission of an MIB, a PDCCH for scheduling one time of transmission of an SIB 1, a PDSCH for carrying one time of transmission of the SIB 1, a PDCCH for scheduling one time of transmission of SI, and a PDSCH for carrying one time of transmission of the SI are all transmitted in one subframe. In the existing LTE or LTE-A system, the user equipment performs channel measurement by using a CSI-RS. The base station performs CSI-RS configuration and CSI-RS subframe configuration for the user equipment by using dedicated signaling, so that the user equipment learns which subframes a CSI-RS is transmitted in and also learns a configuration of the CSI-RS.

0137In the case of coverage enhancement, MIB information may be transmitted multiple times to improve transmission reliability of an MIB, and a PBCH for carrying multiple times of transmission of the MIB may be referred to as an enhanced PBCH. Similarly, control information may be transmitted multiple times to improve transmission reliability of the control information, and a PDCCH for carrying multiple times of transmission of the control information may be referred to as an enhanced PDCCH. Data may be transmitted multiple times to improve transmission reliability of the data, and a PDSCH for carrying multiple times of transmission of the data is referred to as an enhanced PDSCH. The data herein includes, but is not limited to, an SIB 1, SI, another SIB, unicast data, a paging message, a random access response, or other common data. In this case, UE that requires coverage enhancement does not know a CSI-RS configuration and a CSI-RS subframe configuration that are configured by the base station for Normal UE or Legacy UE, where the Normal UE band the Legacy UE both are referred to as normal UE. When the enhanced transmission of the first information is performed, where the first information may be an MIB, control information, or data, if the enhanced transmission of the first information is not limited, CSI-RS transmission may collide with the enhanced transmission of the first information, lowering transmission reliability of the first information.

0138This embodiment of the present invention provides an information transmission method, which can avoid a collision between CSI-RS transmission and enhanced transmission of first information, improving transmission reliability of the first information.

0139First, the base station determines the subframe for the enhanced transmission of the first information.

0140Specifically, a method of how the base station determines the subframe for the enhanced transmission of the first information is described in detail in the following embodiments, and details are not described herein.

0141S102: The base station repeatedly transmits the first information multiple times in the determined subframe for the enhanced transmission of the first information, and skips channel state information-reference signal CSI-RS transmission on a resource element occupied by the enhanced transmission of the first information.

0142The first information is a master information block MIB, and a quantity of times of repeatedly transmitting the MIB in at least one radio frame is greater than one time; or the first information is a system information block type 1 SIB 1, and a quantity of times of repeatedly transmitting the SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of repeatedly transmitting the first information in the determined subframe for the enhanced transmission of the first information is at least two times.

0143After determining the subframe for the enhanced transmission of the first information, the base station repeatedly transmits the first information multiple times in the determined subframe for the enhanced transmission of the first information, and skips the channel state information-reference signal CSI-RS transmission on the resource element occupied by the enhanced transmission of the first information.

0144It should be noted that, according to different types of the first information, the base station repeatedly transmits the first information multiple times in the determined subframe for the enhanced transmission of the first information at different frequencies. When the first information is a master information block MIB, a quantity of times of repeatedly sending the MIB in at least one radio frame is greater than one time; or when the first information is a system information block type 1 SIB 1, a quantity of times of repeatedly sending the SIB 1 in at least two consecutive radio frames is greater than one time; or when the first information is system information, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information except an MIB and an SIB 1, a quantity of times of repeatedly sending the first information in the determined subframe for the enhanced transmission of the first information is at least two times.

0145According to the information transmission method provided in this embodiment of the present invention, a subframe for enhanced transmission of first information is determined, and the first information is repeatedly transmitted multiple times in the determined subframe for the enhanced transmission of the first information, and CSI-RS transmission is skipped on a resource element occupied by the enhanced transmission of the first information, where the first information is a master information block MIB, and a quantity of times of repeatedly transmitting the MIB in at least one radio frame is greater than one time; or the first information is a system information block type 1 SIB 1, and a quantity of times of repeatedly transmitting the SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of repeatedly transmitting the first information in the determined subframe for the enhanced transmission of the first information is at least two times. According to the solution, a collision between the CSI-RS transmission and the enhanced transmission of the first information can be avoided, improving transmission reliability of the first information.

Embodiment

2

0146This embodiment of the present invention provides an information transmission method. As shown in <figref idref="f0001">FIG. 2</figref>, the method includes:

0147S201: Abase station determines a subframe for enhanced transmission of first information, where for an FDD (Frequency Division Duplex, frequency division duplex) system, the subframe for the enhanced transmission of the first information includes one or more subframes of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a TDD (Time Division Duplex, time division duplex) system, the subframe for the enhanced transmission of the first information includes one or more subframes of the subframe 0, a subframe 1, the subframe 5, and a subframe 6.

0148This embodiment of the present invention provides an information transmission method, which can avoid a collision between a subframe for CSI-RS transmission and a subframe for enhanced transmission, improving transmission reliability of first information.

0149First, the base station determines the subframe for the enhanced transmission of the first information.

0150CSI-RS transmission cannot be performed in a paging subframe determined in a cell specific paging configuration and a special subframe of the TDD. Similarly, if the CSI-RS transmission collides with transmission of a PBCH, a synchronization channel, or an SIB 1, the CSI-RS transmission cannot be performed in subframes for transmitting the PBCH, the synchronization channel, or the SIB 1, either. Therefore, the base station may choose to determine the subframe for the enhanced transmission of the first information from the foregoing subframes, so as to avoid a collision between the CSI-RS transmission and the enhanced transmission of the first information, improving transmission reliability of the first information.

0151In an existing LTE or LTE-A system, time-domain resources are divided as radio frames, and the radio frames are numbered 0 to 1023. One radio frame includes 10 subframes, a time length of one subframe is 1 ms, and subframes in each radio frame are numbered 0 to 9.

0152It should be noted that, for the FDD and TDD systems, a PBCH is transmitted in a subframe 0, and an SIB 1 is transmitted in a subframe 5 in an even-numbered radio frame. For the TDD system, a subframe 1 is surely a special subframe, and a subframe 6 may be a special subframe.

0153It should be noted that, for a paging message, nB is used for determining a period of a radio frame including a paging subframe, and/or a quantity of paging subframes included in one radio frame. A value of nB is 4T, 2T, T, T/2, T/4, T/8, T/16, or T/32. T herein is a discontinuous receiving period of user equipment. When nB is greater than or equal to T, each radio frame has a paging subframe and each radio frame has nB/T paging subframes. When nB is less than T, one radio frame in every (T/nB) radio frames has a paging subframe, and the radio frame including a paging subframe has only one paging subframe.

0154Exemplarily, when nB=4T, each radio frame includes four paging subframes; or when nB=T/4, one radio frame in every four radio frames has a paging subframe, and the radio frame including a paging subframe has only one paging subframe.

0155For the FDD system, if one radio frame includes one paging subframe, the subframe 9 is a paging subframe; if one radio frame includes two paging subframes, the subframe 4 and the subframe 9 are paging subframes; or if one radio frame includes four paging subframes, the subframe 0, the subframe 4, the subframe 5, and the subframe 9 are paging subframes; and for the TDD system, if one radio frame includes one paging subframe, the subframe 0 is a paging subframe; if one radio frame includes two paging subframes, the subframe 0 and the subframe 5 are paging subframes; or if one radio frame includes four paging subframes, the subframe 0, the subframe 1, the subframe 5, and the subframe 6 are paging subframes.

0156Therefore, this embodiment of the present invention provides an information transmission method, where the determining a subframe for enhanced transmission of first information may be: <ul id="ul0038" list-style="none" compact="compact"><li>for the FDD system, the subframe for the enhanced transmission of the first information includes one or more subframes of the subframe 0, the subframe 4, the subframe 5, and the subframe 9; and</li><li>for the TDD system, the subframe for the enhanced transmission of the first information includes one or more subframes of the subframe 0, the subframe 1, the subframe 5, and the subframe 6.</li></ul>

0157For the FDD system, the subframe for the enhanced transmission of the first information includes the subframe 9; or the subframe for the enhanced transmission of the first information includes the subframe 4 and the subframe 9; and for the TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0; or the subframe for the enhanced transmission of the first information includes the subframe 0 and the subframe 5.

0158It should be additionally noted that, the subframe for the enhanced transmission of the first information further includes: <ul id="ul0039" list-style="none" compact="compact"><li>for the FDD system, the subframe for the enhanced transmission of the first information further includes the subframe 0 and/or the subframe 5; and</li><li>for the TDD system, the subframe for the enhanced transmission of the first information further includes the subframe 1 and/or the subframe 6.</li></ul>

0159For the FDD system, the subframe for the enhanced transmission of the first information includes the subframe 0, the subframe 4, the subframe 5, and the subframe 9; and for the TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0, the subframe 1, the subframe 5, and the subframe 6.

0160S202: The base station repeatedly transmits the first information multiple times in the determined subframe for the enhanced transmission of the first information, and skips channel state information-reference signal CSI-RS transmission on a resource element occupied by the enhanced transmission of the first information.

0161The first information is a master information block MIB, and a quantity of times of repeatedly transmitting the MIB in at least one radio frame is greater than one time; or the first information is a system information block type 1 SIB 1, and a quantity of times of repeatedly transmitting the SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of repeatedly transmitting the first information in the determined subframe for the enhanced transmission of the first information is at least two times.

0162After determining the subframe for the enhanced transmission of the first information, the base station repeatedly transmits the first information multiple times in the determined subframe for the enhanced transmission of the first information, and skips the channel state information-reference signal CSI-RS transmission on the resource element occupied by the enhanced transmission of the first information.

0163It should be noted that, according to different types of the first information, the base station repeatedly transmits the first information multiple times in the determined subframe for the enhanced transmission of the first information at different frequencies. When the first information is a master information block MIB, a quantity of times of repeatedly sending the MIB in at least one radio frame is greater than one time; or when the first information is a system information block type 1 SIB 1, a quantity of times of repeatedly sending the SIB 1 in at least two consecutive radio frames is greater than one time; or when the first information is system information, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information except an MIB and an SIB 1, a quantity of times of repeatedly sending the first information in the determined subframe for the enhanced transmission of the first information is at least two times.

0164According to the information transmission method provided in this embodiment of the present invention, a subframe for enhanced transmission of first information is determined, and the first information is repeatedly transmitted multiple times in the determined subframe for the enhanced transmission of the first information, and CSI-RS transmission is skipped on a resource element occupied by the enhanced transmission of the first information, where the first information is a master information block MIB, and a quantity of times of repeatedly transmitting the MIB in at least one radio frame is greater than one time; or the first information is a system information block type 1 SIB 1, and a quantity of times of repeatedly transmitting the SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of repeatedly transmitting the first information in the determined subframe for the enhanced transmission of the first information is at least two times. According to the solution, a collision between the CSI-RS transmission and the enhanced transmission of the first information can be avoided, improving transmission reliability of the first information.

Embodiment 3

0165This embodiment of the present invention provides an information transmission method. As shown in <figref idref="f0002">FIG. 3</figref>, the method includes:

0166S301: Abase station determines a subframe for enhanced transmission of first information.

0167This embodiment of the present invention provides an information transmission method, which can avoid a collision between CSI-RS transmission and enhanced transmission of first information, improving transmission reliability of the first information.

0168First, the base station determines the subframe for the enhanced transmission of the first information.

0169S302: The base station determines a resource element occupied by CSI-RS transmission and a subframe for the CSI-RS transmission.

0170After the base station determines the subframe for the enhanced transmission of the first information, the base station needs to determine the resource element occupied by the CSI-RS transmission and the subframe for the CSI-RS transmission.

0171A method of determining, by the base station, a resource element occupied by CSI-RS transmission is as shown in <figref idref="f0002">FIG. 4</figref>, and specifically includes:

0172S401: The base station determines an available CSI-RS configuration according to a preset rule, or the base station sets an available CSI-RS configuration and notifies user equipment of the available CSI-RS configuration by using signaling, where the available CSI-RS configuration includes one or more CSI-RS configurations.

0173It should be noted that, there are two methods for the base station to determine an available CSI-RS configuration. If a system or a standard presets an available CSI-RS configuration, the base station determines an available CSI-RS configuration according to a preset rule. If the system or the standard does not preset an available CSI-RS configuration, the base station autonomously sets an available CSI-RS configuration, and notifies the user equipment of the set available CSI-RS configuration by using signaling.

0174The available CSI-RS configuration includes one or more CSI-RS configurations.

0175S402: The base station determines, according to the available CSI-RS configuration, the resource element occupied by the CSI-RS transmission.

0176After determining the available CSI-RS configuration, the base station determines, according to the available CSI-RS configuration, the resource element occupied by the CSI-RS transmission.

0177The method described in the present invention of determining, by the base station, a resource element occupied by CSI-RS transmission is also applicable in the following embodiments, and is not described in the following embodiments again.

0178A method of determining, by the base station, a subframe for the CSI-RS transmission is as shown in <figref idref="f0003">FIG. 5</figref>, and specifically includes:

0179S501: The base station determines an available CSI-RS subframe configuration according to a preset rule, or the base station sets an available CSI-RS subframe configuration and notifies user equipment of the available CSI-RS subframe configuration by using signaling, where the available CSI-RS subframe configuration includes one or more CSI-RS subframe configurations.

0180It should be noted that, there are two methods for the base station to determine an available CSI-RS subframe configuration. If a system or a standard presets an available CSI-RS subframe configuration, the base station determines an available CSI-RS subframe configuration according to a preset rule. If the system or the standard does not preset an available CSI-RS subframe configuration, the base station autonomously sets an available CSI-RS subframe configuration, and notifies the user equipment of the set available CSI-RS subframe configuration by using signaling.

0181The available CSI-RS subframe configuration includes one or more CSI-RS subframe configurations.

0182S502: The base station determines the subframe for the CSI-RS transmission according to the available CSI-RS subframe configuration.

0183After determining the available CSI-RS subframe configuration, the base station determines the subframe for the CSI-RS transmission according to the available CSI-RS subframe configuration.

0184The method described in the present invention of determining, by the base station, a subframe for the CSI-RS transmission is also applicable in the following embodiments, and is not described in the following embodiments again.

0185It should be noted that, the signaling mentioned in steps S401, S402, S501, and S502 specifically includes: an MIB, a system information block SIB, Radio Resource Control RRC common signaling, RRC dedicated signaling, Media Access Control MAC signaling, or physical layer signaling.

0186S303: If the subframe for the CSI-RS transmission collides with the subframe for the enhanced transmission of the first information, the base station skips transmitting the first information on the resource element occupied by the CSI-RS transmission in the determined subframe in which the enhanced transmission of the first information collides with the CSI-RS transmission.

0187After the base station determines the resource element occupied by the CSI-RS transmission and the subframe for the CSI-RS transmission, if the CSI-RS transmission is performed in the determined subframe for the enhanced transmission of the first information, that is, the subframe for the CSI-RS transmission collides with the subframe for the enhanced transmission of the first information, the base station skips performing multiple times of repeatedly transmitting the first information on the resource element occupied by the CSI-RS transmission in the determined subframe in which the enhanced transmission of the first information collides with the CSI-RS transmission, thereby avoiding a collision between the CSI-RS transmission and the enhanced transmission of the first information.

0188S304: The base station repeatedly transmits the first information multiple times in the determined subframe for the enhanced transmission of the first information, and skips the channel state information-reference signal CSI-RS transmission on a resource element occupied by the enhanced transmission of the first information.

0189The first information is a master information block MIB, and a quantity of times of repeatedly transmitting the MIB in at least one radio frame is greater than one time; or the first information is a system information block type 1 SIB 1, and a quantity of times of repeatedly transmitting the SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of repeatedly transmitting the first information in the determined subframe for the enhanced transmission of the first information is at least two times.

0190After determining the subframe for the enhanced transmission of the first information, the base station repeatedly transmits the first information multiple times in the determined subframe for the enhanced transmission of the first information, and skips the channel state information-reference signal CSI-RS transmission on the resource element occupied by the enhanced transmission of the first information.

0191It should be noted that, according to different types of the first information, the base station repeatedly transmits the first information multiple times in the determined subframe for the enhanced transmission of the first information at different frequencies. When the first information is a master information block MIB, a quantity of times of repeatedly sending the MIB in at least one radio frame is greater than one time; or when the first information is a system information block type 1 SIB 1, a quantity of times of repeatedly sending the SIB 1 in at least two consecutive radio frames is greater than one time; or when the first information is system information, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information except an MIB and an SIB 1, a quantity of times of repeatedly sending the first information in the determined subframe for the enhanced transmission of the first information is at least two times.

0192According to the information transmission method provided in this embodiment of the present invention, a subframe for enhanced transmission of first information is determined, and the first information is repeatedly transmitted multiple times in the determined subframe for the enhanced transmission of the first information, and CSI-RS transmission is skipped on a resource element occupied by the enhanced transmission of the first information, where the first information is a master information block MIB, and a quantity of times of repeatedly transmitting the MIB in at least one radio frame is greater than one time; or the first information is a system information block type 1 SIB 1, and a quantity of times of repeatedly transmitting the SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of repeatedly transmitting the first information in the determined subframe for the enhanced transmission of the first information is at least two times. According to the solution, a collision between the CSI-RS transmission and the enhanced transmission of the first information can be avoided, improving transmission reliability of the first information.

Embodiment 4

0193This embodiment of the present invention provides an information transmission method. As shown in <figref idref="f0003">FIG. 6</figref>, the method includes:

0194S601: Abase station determines a subframe for enhanced transmission of first information.

0195This embodiment of the present invention provides an information transmission method, which can avoid a collision between CSI-RS transmission and enhanced transmission of first information, improving transmission reliability of the first information.

0196First, the base station determines the subframe for the enhanced transmission of the first information.

0197S602: The base station determines a resource element occupied by CSI-RS transmission.

0198After the base station determines the subframe for the enhanced transmission of the first information, the base station needs to determine the resource element occupied by the CSI-RS transmission.

0199S603: The base station skips transmitting the first information on the resource element occupied by the CSI-RS transmission in the determined subframe for the enhanced transmission of the first information.

0200After determining the resource element occupied by the CSI-RS transmission, the base station skips performing multiple times of repeatedly transmitting the first information on the resource element occupied by the CSI-RS transmission in the determined subframe for the enhanced transmission of the first information, thereby avoiding a collision between the CSI-RS transmission and the enhanced transmission of the first information.

0201S604: The base station repeatedly transmits the first information multiple times in the determined subframe for the enhanced transmission of the first information, and skips the channel state information-reference signal CSI-RS transmission on a resource element occupied by the enhanced transmission of the first information.

0202The first information is a master information block MIB, and a quantity of times of repeatedly transmitting the MIB in at least one radio frame is greater than one time; or the first information is a system information block type 1 SIB 1, and a quantity of times of repeatedly transmitting the SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of repeatedly transmitting the first information in the determined subframe for the enhanced transmission of the first information is at least two times.

0203After determining the subframe for the enhanced transmission of the first information, the base station repeatedly transmits the first information multiple times in the determined subframe for the enhanced transmission of the first information, and skips the channel state information-reference signal CSI-RS transmission on the resource element occupied by the enhanced transmission of the first information.

0204It should be noted that, according to different types of the first information, the base station repeatedly transmits the first information multiple times in the determined subframe for the enhanced transmission of the first information at different frequencies. When the first information is a master information block MIB, a quantity of times of repeatedly sending the MIB in at least one radio frame is greater than one time; or when the first information is a system information block type 1 SIB 1, a quantity of times of repeatedly sending the SIB 1 in at least two consecutive radio frames is greater than one time; or when the first information is system information, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information except an MIB and an SIB 1, a quantity of times of repeatedly sending the first information in the determined subframe for the enhanced transmission of the first information is at least two times.

0205According to the information transmission method provided in this embodiment of the present invention, a subframe for enhanced transmission of first information is determined, and the first information is repeatedly transmitted multiple times in the determined subframe for the enhanced transmission of the first information, and CSI-RS transmission is skipped on a resource element occupied by the enhanced transmission of the first information, where the first information is a master information block MIB, and a quantity of times of repeatedly transmitting the MIB in at least one radio frame is greater than one time; or the first information is a system information block type 1 SIB 1, and a quantity of times of repeatedly transmitting the SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of repeatedly transmitting the first information in the determined subframe for the enhanced transmission of the first information is at least two times. According to the solution, a collision between the CSI-RS transmission and the enhanced transmission of the first information can be avoided, improving transmission reliability of the first information.

Embodiment

5

0206This embodiment of the present invention provides an information transmission method. As shown in <figref idref="f0004">FIG. 7</figref>, the method includes:

0207S701: A base station determines a subframe for enhanced transmission of first information.

0208This embodiment of the present invention provides an information transmission method, which can avoid a collision between CSI-RS transmission and enhanced transmission of first information, improving transmission reliability of the first information.

0209First, the base station determines the subframe for the enhanced transmission of the first information.

0210S702: The base station determines a subframe for CSI-RS transmission.

0211After the base station determines the subframe for the enhanced transmission of the first information, the base station needs to determine the subframe for the CSI-RS transmission.

0212S703: The base station skips transmitting the first information in the subframe for the CSI-RS transmission.

0213After determining the subframe for the CSI-RS transmission, the base station skips performing multiple times of repeatedly transmitting the first information in the subframe for the CSI-RS transmission, thereby avoiding a collision between the CSI-RS transmission and the enhanced transmission of the first information.

0214S704: The base station repeatedly transmits the first information multiple times in the determined subframe for the enhanced transmission of the first information, and skips the channel state information-reference signal CSI-RS transmission on a resource element occupied by the enhanced transmission of the first information.

0215The first information is a master information block MIB, and a quantity of times of repeatedly transmitting the MIB in at least one radio frame is greater than one time; or the first information is a system information block type 1 SIB 1, and a quantity of times of repeatedly transmitting the SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of repeatedly transmitting the first information in the determined subframe for the enhanced transmission of the first information is at least two times.

0216After determining the subframe for the enhanced transmission of the first information, the base station repeatedly transmits the first information multiple times in the determined subframe for the enhanced transmission of the first information, and skips the channel state information-reference signal CSI-RS transmission on the resource element occupied by the enhanced transmission of the first information.

0217It should be noted that, according to different types of the first information, the base station repeatedly transmits the first information multiple times in the determined subframe for the enhanced transmission of the first information at different frequencies. When the first information is a master information block MIB, a quantity of times of repeatedly sending the MIB in at least one radio frame is greater than one time; or when the first information is a system information block type 1 SIB 1, a quantity of times of repeatedly sending the SIB 1 in at least two consecutive radio frames is greater than one time; or when the first information is system information, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information except an MIB and an SIB 1, a quantity of times of repeatedly sending the first information in the determined subframe for the enhanced transmission of the first information is at least two times.

0218According to the information transmission method provided in this embodiment of the present invention, a subframe for enhanced transmission of first information is determined, and the first information is repeatedly transmitted multiple times in the determined subframe for the enhanced transmission of the first information, and CSI-RS transmission is skipped on a resource element occupied by the enhanced transmission of the first information, where the first information is a master information block MIB, and a quantity of times of repeatedly transmitting the MIB in at least one radio frame is greater than one time; or the first information is a system information block type 1 SIB 1, and a quantity of times of repeatedly transmitting the SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of repeatedly transmitting the first information in the determined subframe for the enhanced transmission of the first information is at least two times. According to the solution, a collision between the CSI-RS transmission and the enhanced transmission of the first information can be avoided, improving transmission reliability of the first information.

Embodiment

6

0219This embodiment of the present invention provides another information transmission method. As shown in <figref idref="f0004">FIG. 8</figref>, the method includes:

0220S801: User equipment determines a subframe for enhanced transmission of first information.

0221Coverage enhancement needs to be performed on coverage of an LTE network, so as to ensure that the user equipment can reliably communicate with a base station when the user equipment is in a basement or channel quality is poor. In an existing LTE or LTE-A system, a PBCH for carrying one time of transmission of an MIB, a PDCCH for scheduling one time of transmission of an SIB 1, a PDSCH for carrying one time of transmission of the SIB 1, a PDCCH for scheduling one time of transmission of SI, and a PDSCH for carrying one time of transmission of the SI are all transmitted in one subframe. In the existing LTE or LTE-A system, the user equipment may perform channel measurement by using a CSI-RS. The base station performs CSI-RS configuration and CSI-RS subframe configuration for the user equipment by using dedicated signaling, so that the user equipment learns which subframes a CSI-RS is transmitted in and also learns a configuration of the CSI-RS.

0222In the case of coverage enhancement, MIB information may be transmitted multiple times to improve transmission reliability of an MIB, and a PBCH for carrying multiple times of transmission of the MIB may be referred to as an enhanced PBCH. Similarly, control information may be transmitted multiple times to improve transmission reliability of the control information, and a PDCCH for carrying multiple times of transmission of the control information may be referred to as an enhanced PDCCH. Data may be transmitted multiple times to improve transmission reliability of the data, and a PDSCH for carrying multiple times of transmission of the data is referred to as an enhanced PDSCH. The data herein includes, but is not limited to, an SIB 1, SI, another SIB, unicast data, a paging message, a random access response, or other common data. In this case, UE that requires coverage enhancement does not know a CSI-RS configuration and a CSI-RS subframe configuration that are configured by the base station for Normal UE or Legacy UE, where the Normal UE band the Legacy UE both are referred to as normal UE. When the enhanced transmission of the first information is performed, where the first information may be an MIB, control information, or data, if the enhanced transmission of the first information is not limited, CSI-RS transmission may collide with the enhanced transmission of the first information, lowering transmission reliability of the first information.

0223This embodiment of the present invention provides an information transmission method, which can avoid a collision between CSI-RS transmission and enhanced transmission of first information, improving transmission reliability of the first information.

0224First, the user equipment determines the subframe for the enhanced transmission of the first information.

0225Specifically, a method of how the user equipment determines the subframe for the enhanced transmission of the first information is described in detail in the following embodiments, and details are not described herein.

0226S802: The user equipment receives, in the determined subframe for the enhanced transmission of the first information, the first information that is repeatedly transmitted multiple times, and skips CSI-RS transmission on a resource element occupied by the received first information that is repeatedly transmitted multiple times.

0227The first information is an MIB, and a quantity of times of receiving the repeatedly transmitted MIB in at least one radio frame is greater than one time; or the first information is an SIB 1, and a quantity of times of receiving the repeatedly transmitted SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of receiving the repeatedly transmitted first information in the determined subframe for the enhanced transmission of the first information is at least two times.

0228After determining the subframe for the enhanced transmission of the first information, the user equipment receives, in the determined subframe for the enhanced transmission of the first information, the first information that is repeatedly transmitted multiple times, and skips the CSI-RS transmission on the resource element occupied by the received first information.

0229It should be noted that, according to different types of the first information, the user equipment receives, at different frequencies in the determined subframe for the enhanced transmission of the first information, the first information that is repeatedly transmitted multiple times. When the first information is an MIB, a quantity of times of repeated receiving of the MIB in at least one radio frame is greater than one time; or when the first information is an SIB 1, a quantity of times of repeated receiving of the SIB 1 in at least two consecutive radio frames is greater than one time; or when the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, a quantity of times of repeated receiving of the first information in the determined subframe for the enhanced transmission of the first information is at least two times.

0230It should be noted that, according to the information transmission method provided in this embodiment of the present invention, after the user equipment receives, in the determined subframe for the enhanced transmission of the first information, the first information that is repeatedly transmitted multiple times, the user equipment can further combine the received first information that is repeatedly transmitted multiple times, and detect the combined first information.

0231According to the information transmission method provided in this embodiment of the present invention, a subframe for enhanced transmission of first information is determined, and the first information repeatedly transmitted multiple times is received in the determined subframe for the enhanced transmission of the first information, and CSI-RS transmission is skipped on a resource element occupied by the first information that is repeatedly transmitted multiple times, where the first information is an MIB, and a quantity of times of receiving the repeatedly transmitted MIB in at least one radio frame is greater than one time; or the first information is an SIB 1, and a quantity of times of receiving the repeatedly transmitted SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of receiving the repeatedly transmitted first information in the determined subframe for the enhanced transmission of the first information is at least two times. According to the solution, a collision between the CSI-RS transmission and the enhanced transmission of the first information can be avoided, improving transmission reliability of the first information.

Embodiment

7

0232This embodiment of the present invention provides another information transmission method. As shown in <figref idref="f0005">FIG. 9</figref>, the method includes:

0233S901: User equipment determines a subframe for enhanced transmission of first information, where for an FDD system, the subframe for the enhanced transmission of the first information includes one or more subframes of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a TDD system, the subframe for the enhanced transmission of the first information includes one or more subframes of the subframe 0, a subframe 1, the subframe 5, and a subframe 6.

0234This embodiment of the present invention provides an information transmission method, which can avoid a collision between a subframe for CSI-RS transmission and a subframe for enhanced transmission, improving transmission reliability of first information.

0235First, the user equipment determines the subframe for the enhanced transmission of the first information.

0236CSI-RS transmission cannot be performed in a paging subframe determined in a cell specific paging configuration and a special subframe of the TDD. Similarly, if the CSI-RS transmission collides with transmission of a PBCH, a synchronization channel, or an SIB 1, the CSI-RS transmission cannot be performed in subframes for transmitting the PBCH, the synchronization channel, or the SIB 1, either. Therefore, the user equipment may choose to determine the subframe for the enhanced transmission of the first information from the foregoing subframes, so as to avoid a collision between the CSI-RS transmission and the enhanced transmission of the first information, improving transmission reliability of the first information.

0237In an existing LTE or LTE-A system, time-domain resources are divided as radio frames, and the radio frames are numbered 0 to 1023. One radio frame includes 10 subframes, a time length of one subframe is 1 ms, and subframes in each radio frame are numbered 0 to 9.

0238It should be noted that, for the FDD and TDD systems, a PBCH is transmitted in a subframe 0, and an SIB 1 is transmitted in a subframe 5 in an even-numbered radio frame; and for the TDD system, a subframe 1 is surely a special subframe, and a subframe 6 may be a special subframe.

0239It should be noted that, for a paging message, nB is used for determining a period of a radio frame including a paging subframe, and/or a quantity of paging subframes included in one radio frame. A value of nB is 4T, 2T, T, T/2, T/4, T/8, T/16, or T/32. T herein is a discontinuous receiving period of the user equipment. When nB is greater than or equal to T, each radio frame has a paging subframe and each radio frame has nB/T paging subframes. When nB is less than T, one radio frame in every (T/nB) radio frames has a paging subframe, and the radio frame including a paging subframe has only one paging subframe.

0240Exemplarily, when nB=4T, each radio frame includes four paging subframes; or when nB=T/4, one radio frame in every four radio frames has a paging subframe, and the radio frame including a paging subframe has only one paging subframe.

0241For the FDD system, if one radio frame includes one paging subframe, the subframe 9 is a paging subframe; if one radio frame includes two paging subframes, the subframe 4 and the subframe 9 are paging subframes; or if one radio frame includes four paging subframes, the subframe 0, the subframe 4, the subframe 5, and the subframe 9 are paging subframes; and for the TDD system, if one radio frame includes one paging subframe, the subframe 0 is a paging subframe; if one radio frame includes two paging subframes, the subframe 0 and the subframe 5 are paging subframes; or if one radio frame includes four paging subframes, the subframe 0, the subframe 1, the subframe 5, and the subframe 6 are paging subframes.

0242Therefore, this embodiment of the present invention provides an information transmission method, where the determining a subframe for enhanced transmission of first information may be: <ul id="ul0040" list-style="none" compact="compact"><li>for the FDD system, the subframe for the enhanced transmission of the first information includes one or more subframes of the subframe 0, the subframe 4, the subframe 5, and the subframe 9; and</li><li>for the TDD system, the subframe for the enhanced transmission of the first information includes one or more subframes of the subframe 0, the subframe 1, the subframe 5, and the subframe 6.</li></ul>

0243For the FDD system, the subframe for the enhanced transmission of the first information includes the subframe 9; or the subframe for the enhanced transmission of the first information includes the subframe 4 and the subframe 9; and for the TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0; or the subframe for the enhanced transmission of the first information includes the subframe 0 and the subframe 5.

0244It should be additionally noted that, the subframe for the enhanced transmission of the first information further includes: <ul id="ul0041" list-style="none" compact="compact"><li>for the FDD system, the subframe for the enhanced transmission of the first information further includes the subframe 0 and/or the subframe 5; and</li><li>for the TDD system, the subframe for the enhanced transmission of the first information further includes the subframe 1 and/or the subframe 6.</li></ul>

0245For the FDD system, the subframe for the enhanced transmission of the first information includes the subframe 0, the subframe 4, the subframe 5, and the subframe 9; and for the TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0, the subframe 1, the subframe 5, and the subframe 6.

0246S902: The user equipment receives, in the determined subframe for the enhanced transmission of the first information, the first information that is repeatedly transmitted multiple times, and skips CSI-RS transmission on a resource element occupied by the received first information that is repeatedly transmitted multiple times.

0247The first information is an MIB, and a quantity of times of receiving the repeatedly transmitted MIB in at least one radio frame is greater than one time; or the first information is an SIB 1, and a quantity of times of receiving the repeatedly transmitted SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of receiving the repeatedly transmitted first information in the determined subframe for the enhanced transmission of the first information is at least two times.

0248After determining the subframe for the enhanced transmission of the first information, the user equipment receives, in the determined subframe for the enhanced transmission of the first information, the first information that is repeatedly transmitted multiple times, and skips the CSI-RS transmission on the resource element occupied by the received first information.

0249It should be noted that, according to different types of the first information, the user equipment receives, at different frequencies in the determined subframe for the enhanced transmission of the first information, the first information that is repeatedly transmitted multiple times. When the first information is an MIB, a quantity of times of repeated receiving of the MIB in at least one radio frame is greater than one time; or when the first information is an SIB 1, a quantity of times of repeated receiving of the SIB 1 in at least two consecutive radio frames is greater than one time; or when the first information is system information, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information except an MIB and an SIB 1, a quantity of times of repeated receiving of the first information in the determined subframe for the enhanced transmission of the first information is at least two times.

0250It should be noted that, according to the information transmission method provided in this embodiment of the present invention, after the user equipment receives, in the determined subframe for the enhanced transmission of the first information, the first information that is repeatedly transmitted multiple times, the user equipment can further combine and detect the received first information that is repeatedly transmitted multiple times, improving detection reliability of the first information.

0251According to the information transmission method provided in this embodiment of the present invention, a subframe for enhanced transmission of first information is determined, and the first information repeatedly transmitted multiple times is received in the determined subframe for the enhanced transmission of the first information, and CSI-RS transmission is skipped on a resource element occupied by the first information that is repeatedly transmitted multiple times, where the first information is an MIB, and a quantity of times of receiving the repeatedly transmitted MIB in at least one radio frame is greater than one time; or the first information is an SIB 1, and a quantity of times of receiving the repeatedly transmitted SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of receiving the repeatedly transmitted first information in the determined subframe for the enhanced transmission of the first information is at least two times. According to the solution, a collision between the CSI-RS transmission and the enhanced transmission of the first information can be avoided, improving transmission reliability of the first information.

Embodiment 8

0252This embodiment of the present invention provides another information transmission method. As shown in <figref idref="f0005">FIG. 10</figref>, the method includes:

0253S1001: User equipment determines a subframe for enhanced transmission of first information.

0254This embodiment of the present invention provides an information transmission method, which can avoid a collision between CSI-RS transmission and enhanced transmission of first information, improving transmission reliability of the first information.

0255First, the user equipment determines the subframe for the enhanced transmission of the first information.

0256S1002: The user equipment determines a resource element occupied by CSI-RS transmission and a subframe for the CSI-RS transmission.

0257After the user equipment determines the subframe for the enhanced transmission of the first information, the user equipment needs to determine the resource element occupied by the CSI-RS transmission and the subframe for the CSI-RS transmission.

0258The determining, by the user equipment, a resource element occupied by CSI-RS transmission is as shown in <figref idref="f0006">FIG. 11</figref>, and specifically includes:

0259S1101: The user equipment determines an available CSI-RS configuration according to a preset rule, or receives signaling from a base station, where the signaling is used for notifying the available CSI-RS configuration, where the available CSI-RS configuration includes one or more CSI-RS configurations.

0260It should be noted that, there are two methods for the user equipment to determine an available CSI-RS configuration. If a system or a standard presets an available CSI-RS configuration, the user equipment determines an available CSI-RS configuration according to a preset rule. If the system or the standard does not preset an available CSI-RS configuration, the user equipment receives signaling from a base station, where the signaling is used for notifying the available CSI-RS configuration.

0261The available CSI-RS configuration includes one or more CSI-RS configurations.

0262S1102: The user equipment determines, according to the available CSI-RS configuration, the resource element occupied by the CSI-RS transmission.

0263After determining the available CSI-RS configuration, the user equipment determines, according to the available CSI-RS configuration, the resource element occupied by the CSI-RS transmission.

0264The method described in the present invention of determining, by the user equipment, a resource element occupied by CSI-RS transmission is also applicable in the following embodiments, and is not described in the following embodiments again.

0265The determining, by the user equipment, a subframe for the CSI-RS transmission is as shown in <figref idref="f0006">FIG. 12</figref>, and specifically includes:

0266S1201: The user equipment determines an available CSI-RS subframe configuration according to a preset rule, or receives signaling from a base station, where the signaling is used for notifying the available CSI-RS subframe configuration, where the available CSI-RS subframe configuration includes one or more CSI-RS subframe configurations.

0267It should be noted that, there are two methods for the user equipment to determine an available CSI-RS subframe configuration. If a system or a standard presets an available CSI-RS subframe configuration, the user equipment determines an available CSI-RS subframe configuration according to a preset rule. If the system or the standard does not preset an available CSI-RS subframe configuration, the user equipment receives signaling from a base station, where the signaling is used for notifying the available CSI-RS subframe configuration.

0268The available CSI-RS subframe configuration includes one or more CSI-RS subframe configurations.

0269S1202: The user equipment determines the subframe for the CSI-RS transmission according to the available CSI-RS subframe configuration.

0270After determining the available CSI-RS subframe configuration, the user equipment determines the subframe for the CSI-RS transmission according to the available CSI-RS subframe configuration.

0271The method described in the present invention of determining, by the user equipment, a subframe for the CSI-RS transmission is also applicable in the following embodiments, and is not described in the following embodiments again.

0272It should be noted that, the signaling mentioned in steps S1101, S1102, S1201, and S1202 specifically includes: an MIB, a system information block SIB, Radio Resource Control RRC common signaling, RRC dedicated signaling, Media Access Control MAC signaling, or physical layer signaling.

0273S1003: If the subframe for the CSI-RS transmission collides with the subframe for the enhanced transmission of the first information, the user equipment skips receiving the first information on the resource element occupied by the CSI-RS transmission in the determined subframe in which the enhanced transmission of the first information collides with the CSI-RS transmission.

0274After the user equipment determines the resource element occupied by the CSI-RS transmission and the subframe for the CSI-RS transmission, if the CSI-RS transmission is performed in the determined subframe for the enhanced transmission of the first information, the user equipment skips receiving the first information on the resource element occupied by the CSI-RS transmission in the determined subframe in which the enhanced transmission of the first information collides with the CSI-RS transmission, thereby avoiding a collision between the CSI-RS transmission and the enhanced transmission of the first information.

0275S1004: The user equipment receives, in the determined subframe for the enhanced transmission of the first information, the first information that is repeatedly transmitted multiple times, and skips the CSI-RS transmission on a resource element occupied by the received first information that is repeatedly transmitted multiple times.

0276The first information is an MIB, and a quantity of times of receiving the repeatedly transmitted MIB in at least one radio frame is greater than one time; or the first information is an SIB 1, and a quantity of times of receiving the repeatedly transmitted SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of receiving the repeatedly transmitted first information in the determined subframe for the enhanced transmission of the first information is at least two times.

0277After determining the subframe for the enhanced transmission of the first information, the user equipment receives, in the determined subframe for the enhanced transmission of the first information, the first information that is repeatedly transmitted multiple times, and skips the CSI-RS transmission on the resource element occupied by the received first information.

0278It should be noted that, according to different types of the first information, the user equipment receives, at different frequencies in the determined subframe for the enhanced transmission of the first information, the first information that is repeatedly transmitted multiple times. When the first information is an MIB, a quantity of times of repeated receiving of the MIB in at least one radio frame is greater than one time; or when the first information is an SIB 1, a quantity of times of repeated receiving of the SIB 1 in at least two consecutive radio frames is greater than one time; or when the first information is system information, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information except an MIB and an SIB 1, a quantity of times of repeated receiving of the first information in the determined subframe for the enhanced transmission of the first information is at least two times.

0279It should be noted that, according to the information transmission method provided in this embodiment of the present invention, after the user equipment receives, in the determined subframe for the enhanced transmission of the first information, the first information that is repeatedly transmitted multiple times, the user equipment can further combine the received first information that is repeatedly transmitted multiple times, and detect the combined first information.

0280According to the information transmission method provided in this embodiment of the present invention, a subframe for enhanced transmission of first information is determined, and the first information repeatedly transmitted multiple times is received in the determined subframe for the enhanced transmission of the first information, and CSI-RS transmission is skipped on a resource element occupied by the first information that is repeatedly transmitted multiple times, where the first information is an MIB, and a quantity of times of receiving the repeatedly transmitted MIB in at least one radio frame is greater than one time; or the first information is an SIB 1, and a quantity of times of receiving the repeatedly transmitted SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of receiving the repeatedly transmitted first information in the determined subframe for the enhanced transmission of the first information is at least two times. According to the solution, a collision between the CSI-RS transmission and the enhanced transmission of the first information can be avoided, improving transmission reliability of the first information.

Embodiment 9

0281This embodiment of the present invention provides another information transmission method. As shown in <figref idref="f0007">FIG. 13</figref>, the method includes:

0282S1301: User equipment determines a subframe for enhanced transmission of first information.

0283This embodiment of the present invention provides an information transmission method, which can avoid a collision between CSI-RS transmission and enhanced transmission of first information, improving transmission reliability of the first information.

0284First, the user equipment determines the subframe for the enhanced transmission of the first information.

0285S1302: The user equipment determines a resource element occupied by CSI-RS transmission.

0286After the user equipment determines the subframe for the enhanced transmission of the first information, the user equipment needs to determine the resource element occupied by the CSI-RS transmission.

0287S1303: The user equipment skips receiving the first information on the resource element occupied by the CSI-RS transmission in the determined subframe for the enhanced transmission of the first information.

0288After determining the resource element occupied by the CSI-RS transmission, the user equipment skips receiving the first information on the resource element occupied by the CSI-RS transmission in the determined subframe for the enhanced transmission of the first information, thereby avoiding a collision between the CSI-RS transmission and the enhanced transmission of the first information.

0289S1304: The user equipment receives, in the determined subframe for the enhanced transmission of the first information, the first information that is repeatedly transmitted multiple times, and skips the CSI-RS transmission on a resource element occupied by the received first information that is repeatedly transmitted multiple times.

0290The first information is an MIB, and a quantity of times of receiving the repeatedly transmitted MIB in at least one radio frame is greater than one time; or the first information is an SIB 1, and a quantity of times of receiving the repeatedly transmitted SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of receiving the repeatedly transmitted first information in the determined subframe for the enhanced transmission of the first information is at least two times.

0291After determining the subframe for the enhanced transmission of the first information, the user equipment receives, in the determined subframe for the enhanced transmission of the first information, the first information that is repeatedly transmitted multiple times, and skips the CSI-RS transmission on the resource element occupied by the received first information that is repeatedly transmitted multiple times.

0292It should be noted that, according to different types of the first information, the user equipment receives, at different frequencies in the determined subframe for the enhanced transmission of the first information, the first information that is repeatedly transmitted multiple times. When the first information is an MIB, a quantity of times of repeated receiving of the MIB in at least one radio frame is greater than one time; or when the first information is an SIB 1, a quantity of times of repeated receiving of the SIB 1 in at least two consecutive radio frames is greater than one time; or when the first information is system information, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information except an MIB and an SIB 1, a quantity of times of repeated receiving of the first information in the determined subframe for the enhanced transmission of the first information is at least two times.

0293It should be noted that, according to the information transmission method provided in this embodiment of the present invention, after the user equipment receives, in the determined subframe for the enhanced transmission of the first information, the first information that is repeatedly transmitted multiple times, the user equipment can further combine the received first information that is repeatedly transmitted multiple times, and detect the combined first information.

0294According to the information transmission method provided in this embodiment of the present invention, a subframe for enhanced transmission of first information is determined, and the first information repeatedly transmitted multiple times is received in the determined subframe for the enhanced transmission of the first information, and CSI-RS transmission is skipped on a resource element occupied by the first information that is repeatedly transmitted multiple times, where the first information is an MIB, and a quantity of times of receiving the repeatedly transmitted MIB in at least one radio frame is greater than one time; or the first information is an SIB 1, and a quantity of times of receiving the repeatedly transmitted SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of receiving the repeatedly transmitted first information in the determined subframe for the enhanced transmission of the first information is at least two times. According to the solution, a collision between the CSI-RS transmission and the enhanced transmission of the first information can be avoided, improving transmission reliability of the first information.

Embodiment 10

0295This embodiment of the present invention provides another information transmission method. As shown in <figref idref="f0008">FIG. 14</figref>, the method includes:

0296S1401: User equipment determines a subframe for enhanced transmission of first information.

0297This embodiment of the present invention provides an information transmission method, which can avoid a collision between CSI-RS transmission and enhanced transmission of first information, improving transmission reliability of the first information.

0298First, the user equipment determines the subframe for the enhanced transmission of the first information.

0299S1402: The user equipment determines a subframe for CSI-RS transmission.

0300After the user equipment determines the subframe for the enhanced transmission of the first information, the user equipment needs to determine the subframe for the CSI-RS transmission.

0301S1403: The user equipment skips receiving the first information in the subframe for the CSI-RS transmission.

0302After determining the subframe for the CSI-RS transmission, the user equipment skips receiving the first information in the subframe for the CSI-RS transmission, thereby avoiding a collision between the CSI-RS transmission and the enhanced transmission of the first information.

0303S1404: The user equipment receives, in the determined subframe for the enhanced transmission of the first information, the first information that is repeatedly transmitted multiple times, and skips the CSI-RS transmission on a resource element occupied by the received first information that is repeatedly transmitted multiple times.

0304The first information is an MIB, and a quantity of times of receiving the repeatedly transmitted MIB in at least one radio frame is greater than one time; or the first information is an SIB 1, and a quantity of times of receiving the repeatedly transmitted SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of receiving the repeatedly transmitted first information in the determined subframe for the enhanced transmission of the first information is at least two times.

0305After determining the subframe for the enhanced transmission of the first information, the user equipment receives, in the determined subframe for the enhanced transmission of the first information, the first information that is repeatedly transmitted multiple times, and skips the CSI-RS transmission on the resource element occupied by the received first information.

0306It should be noted that, according to different types of the first information, the user equipment receives, at different frequencies in the determined subframe for the enhanced transmission of the first information, the first information that is repeatedly transmitted multiple times. When the first information is an MIB, a quantity of times of repeated receiving of the MIB in at least one radio frame is greater than one time; or when the first information is an SIB 1, a quantity of times of repeated receiving of the SIB 1 in at least two consecutive radio frames is greater than one time; or when the first information is system information, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information except an MIB and an SIB 1, a quantity of times of repeated receiving of the first information in the determined subframe for the enhanced transmission of the first information is at least two times.

0307It should be noted that, according to the information transmission method provided in this embodiment of the present invention, after the user equipment receives, in the determined subframe for the enhanced transmission of the first information, the first information that is repeatedly transmitted multiple times, the user equipment can further combine the received first information that is repeatedly transmitted multiple times, and detect the combined first information.

0308According to the information transmission method provided in this embodiment of the present invention, a subframe for enhanced transmission of first information is determined, and the first information repeatedly transmitted multiple times is received in the determined subframe for the enhanced transmission of the first information, and CSI-RS transmission is skipped on a resource element occupied by the first information that is repeatedly transmitted multiple times, where the first information is an MIB, and a quantity of times of receiving the repeatedly transmitted MIB in at least one radio frame is greater than one time; or the first information is an SIB 1, and a quantity of times of receiving the repeatedly transmitted SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of receiving the repeatedly transmitted first information in the determined subframe for the enhanced transmission of the first information is at least two times. According to the solution, a collision between the CSI-RS transmission and the enhanced transmission of the first information can be avoided, improving transmission reliability of the first information.

Embodiment 11

0309This embodiment of the present invention provides an information transmission apparatus 1. As shown in <figref idref="f0008">FIG. 15</figref>, the apparatus includes: <ul id="ul0042" list-style="none" compact="compact"><li>a determining module 10, configured to determine a subframe for enhanced transmission of first information; and</li><li>a transmission module 11, configured to repeatedly transmit the first information multiple times in the determined subframe for the enhanced transmission of the first information, and skip CSI-RS transmission of a resource element occupied by the enhanced transmission of the first information, where</li><li>the first information is an MIB, and a quantity of times of repeatedly transmitting the MIB in at least one radio frame is greater than one time; or the first information is an SIB 1, and a quantity of times of repeatedly transmitting the SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of repeatedly transmitting the first information in the determined subframe for the enhanced transmission of the first information is at least two times.</li></ul>

0310Further, for an FDD system, the subframe for the enhanced transmission of the first information includes one or more subframes of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a TDD system, the subframe for the enhanced transmission of the first information includes one or more subframes of the subframe 0, a subframe 1, the subframe 5, and a subframe 6.

0311Further, for the FDD system, the subframe for the enhanced transmission of the first information includes the subframe 9; or the subframe for the enhanced transmission of the first information includes the subframe 4 and the subframe 9; and for the TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0; or the subframe for the enhanced transmission of the first information includes the subframe 0 and the subframe 5.

0312Further, the subframe for the enhanced transmission of the first information further includes: <ul id="ul0043" list-style="none" compact="compact"><li>for the FDD system, the subframe for the enhanced transmission of the first information further includes the subframe 0 and/or the subframe 5; and</li><li>for the TDD system, the subframe for the enhanced transmission of the first information further includes the subframe 1 and/or the subframe 6.</li></ul>

0313Further, for the FDD system, the subframe for the enhanced transmission of the first information includes the subframe 0, the subframe 4, the subframe 5, and the subframe 9; and for the TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0, the subframe 1, the subframe 5, and the subframe 6.

0314Further, the determining module 10 is further configured to determine a resource element occupied by the CSI-RS transmission and a subframe for the CSI-RS transmission; and the transmission module 11 is further configured to: if the subframe for the CSI-RS transmission collides with the subframe for the enhanced transmission of the first information, skip transmitting the first information on the resource element occupied by the CSI-RS transmission in the determined subframe in which the enhanced transmission of the first information collides with the CSI-RS transmission.

0315Further, the determining module 10 is further configured to determine a resource element occupied by the CSI-RS transmission; and the transmission module 11 is further configured to skip transmitting the first information on the resource element occupied by the CSI-RS transmission in the determined subframe for the enhanced transmission of the first information.

0316Further, the determining module 10 is further configured to determine a subframe for the CSI-RS transmission; and the transmission module 11 is further configured to skip transmitting the first information in the subframe for the CSI-RS transmission.

0317Further, the determining module 10 is specifically configured to determine an available CSI-RS configuration according to a preset rule, or set an available CSI-RS configuration, where the available CSI-RS configuration includes one or more CSI-RS configurations; the determining module 10 is specifically configured to determine, according to the available CSI-RS configuration, the resource element occupied by the CSI-RS transmission; and as shown in <figref idref="f0009">FIG. 16</figref>, the information transmission apparatus further includes: a notification module 12, configured to notify user equipment of the available CSI-RS configuration by using signaling.

0318Further, the determining module 10 is specifically configured to determine an available CSI-RS subframe configuration according to a preset rule, or set an available CSI-RS subframe configuration, where the available CSI-RS subframe configuration includes one or more CSI-RS subframe configurations; the determining module 10 is specifically configured to determine the subframe for the CSI-RS transmission according to the available CSI-RS subframe configuration; and the notification module 12 is further configured to notify user equipment of the available CSI-RS subframe configuration by using signaling.

0319Further, the signaling includes: an MIB, a system information block SIB, Radio Resource Control RRC common signaling, RRC dedicated signaling, Media Access Control MAC signaling, or physical layer signaling.

0320The information transmission apparatus provided in this embodiment of the present invention includes a determining module, configured to determine a subframe for enhanced transmission of first information, and a transmission module, configured to repeatedly transmit the first information multiple times in the determined subframe for the enhanced transmission of the first information, and skip CSI-RS transmission of a resource element occupied by the enhanced transmission of the first information, where the first information is an MIB, and a quantity of times of repeatedly transmitting the MIB in at least one radio frame is greater than one time; or the first information is an SIB 1, and a quantity of times of repeatedly transmitting the SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of repeatedly transmitting the first information in the determined subframe for the enhanced transmission of the first information is at least two times. According to the solution, a collision between the CSI-RS transmission and the enhanced transmission of the first information can be avoided, improving transmission reliability of the first information.

Embodiment 12

0321This embodiment of the present invention provides another information transmission apparatus 2. As shown in <figref idref="f0009">FIG. 17</figref>, the apparatus includes: <ul id="ul0044" list-style="none" compact="compact"><li>a determining unit 20, configured to determine a subframe for enhanced transmission of first information; and</li><li>a receiving unit 21, configured to receive, in the determined subframe for the enhanced transmission of the first information, the first information that is repeatedly transmitted multiple times, and skip CSI-RS transmission of a resource element occupied by the received first information that is repeatedly transmitted multiple times, where</li><li>the first information is an MIB, and a quantity of times of receiving the repeatedly transmitted MIB in at least one radio frame is greater than one time; or the first information is an SIB 1, and a quantity of times of receiving the repeatedly transmitted SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of receiving the repeatedly transmitted first information in the determined subframe for the enhanced transmission of the first information is at least two times.</li></ul>

0322Further, for an FDD system, the subframe for the enhanced transmission of the first information includes one or more subframes of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a TDD system, the subframe for the enhanced transmission of the first information includes one or more subframes of the subframe 0, a subframe 1, the subframe 5, and a subframe 6.

0323Further, for the FDD system, the subframe for the enhanced transmission of the first information includes the subframe 9; or the subframe for the enhanced transmission of the first information includes the subframe 4 and the subframe 9; and for the TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0; or the subframe for the enhanced transmission of the first information includes the subframe 0 and the subframe 5.

0324Further, the subframe for the enhanced transmission of the first information further includes: <ul id="ul0045" list-style="none" compact="compact"><li>for the FDD system, the subframe for the enhanced transmission of the first information further includes the subframe 0 and/or the subframe 5; and</li><li>for the TDD system, the subframe for the enhanced transmission of the first information further includes the subframe 1 and/or the subframe 6.</li></ul>

0325Further, for the FDD system, the subframe for the enhanced transmission of the first information includes the subframe 0, the subframe 4, the subframe 5, and the subframe 9; and for the TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0, the subframe 1, the subframe 5, and the subframe 6.

0326Further, the determining unit 20 is further configured to determine a resource element occupied by the CSI-RS transmission and a subframe for the CSI-RS transmission; and the receiving unit 21 is further configured to: if the subframe for the CSI-RS transmission collides with the subframe for the enhanced transmission of the first information, skip receiving the first information on the resource element occupied by the CSI-RS transmission in the determined subframe in which the enhanced transmission of the first information collides with the CSI-RS transmission.

0327Further, the determining unit 20 is further configured to determine a resource element occupied by the CSI-RS transmission; and the receiving unit 21 is further configured to skip receiving the first information on the resource element occupied by the CSI-RS transmission in the determined subframe for the enhanced transmission of the first information.

0328Further, the determining unit 20 is further configured to determine a subframe for the CSI-RS transmission; and the receiving unit 21 is further configured to skip receiving the first information in the subframe for the CSI-RS transmission.

0329Further, the determining unit 20 is specifically configured to determine an available CSI-RS configuration according to a preset rule, where the available CSI-RS configuration includes one or more CSI-RS configurations; the receiving unit 21 is further configured to receive signaling from a base station, where the signaling is used for notifying the available CSI-RS configuration; and the determining unit 20 is further configured to determine, according to the available CSI-RS configuration, the resource element occupied by the CSI-RS transmission.

0330Further, the determining unit 20 is specifically configured to determine an available CSI-RS subframe configuration according to a preset rule, where the available CSI-RS subframe configuration includes one or more CSI-RS subframe configurations; the receiving unit 21 is further configured to receive signaling from a base station, where the signaling is used for notifying the available CSI-RS subframe configuration; and the determining unit 20 is further configured to determine the subframe for the CSI-RS transmission according to the available CSI-RS subframe configuration.

0331Further, the signaling includes: an MIB, a system information block SIB, Radio Resource Control RRC common signaling, RRC dedicated signaling, Media Access Control MAC signaling, or physical layer signaling.

0332The information transmission apparatus provided in this embodiment of the present invention includes a determining unit, configured to determine a subframe for enhanced transmission of first information, and a receiving unit, configured to receive, in the determined subframe for the enhanced transmission of the first information, the first information that is repeatedly transmitted multiple times, and skip CSI-RS transmission of a resource element occupied by the received first information that is repeatedly transmitted multiple times, where the first information is an MIB, and a quantity of times of receiving the repeatedly transmitted MIB in at least one radio frame is greater than one time; or the first information is an SIB 1, and a quantity of times of receiving the repeatedly transmitted SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of receiving the repeatedly transmitted first information in the determined subframe for the enhanced transmission of the first information is at least two times. According to the solution, a collision between the CSI-RS transmission and the enhanced transmission of the first information can be avoided, improving transmission reliability of the first information.

Embodiment 13

0333This embodiment of the present invention provides a network device 3. As shown in <figref idref="f0010">FIG. 18</figref>, the device includes: <ul id="ul0046" list-style="none" compact="compact"><li>a processor 30, configured to determine a subframe for enhanced transmission of first information; and</li><li>a transmitter 31, configured to repeatedly transmit the first information multiple times in the determined subframe for the enhanced transmission of the first information, and skip CSI-RS transmission of a resource element occupied by the enhanced transmission of the first information, where</li><li>the first information is an MIB, and a quantity of times of repeatedly transmitting the MIB in at least one radio frame is greater than one time; or the first information is an SIB 1, and a quantity of times of repeatedly transmitting the SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of repeatedly transmitting the first information in the determined subframe for the enhanced transmission of the first information is at least two times.</li></ul>

0334Further, for an FDD system, the subframe for the enhanced transmission of the first information includes one or more subframes of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a TDD system, the subframe for the enhanced transmission of the first information includes one or more subframes of the subframe 0, a subframe 1, the subframe 5, and a subframe 6.

0335Further, for the FDD system, the subframe for the enhanced transmission of the first information includes the subframe 9; or the subframe for the enhanced transmission of the first information includes the subframe 4 and the subframe 9; and for the TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0; or the subframe for the enhanced transmission of the first information includes the subframe 0 and the subframe 5.

0336Further, the subframe for the enhanced transmission of the first information further includes: <ul id="ul0047" list-style="none" compact="compact"><li>for the FDD system, the subframe for the enhanced transmission of the first information further includes the subframe 0 and/or the subframe 5; and</li><li>for the TDD system, the subframe for the enhanced transmission of the first information further includes the subframe 1 and/or the subframe 6.</li></ul>

0337Further, for the FDD system, the subframe for the enhanced transmission of the first information includes the subframe 0, the subframe 4, the subframe 5, and the subframe 9; and for the TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0, the subframe 1, the subframe 5, and the subframe 6.

0338Further, the processor 30 is further configured to determine a resource element occupied by the CSI-RS transmission and a subframe for the CSI-RS transmission; and the transmitter 31 is further configured to: if the subframe for the CSI-RS transmission collides with the subframe for the enhanced transmission of the first information, skip transmitting the first information on the resource element occupied by the CSI-RS transmission in the determined subframe in which the enhanced transmission of the first information collides with the CSI-RS transmission.

0339Further, the processor 30 is further configured to determine a resource element occupied by the CSI-RS transmission; and the transmitter 31 is further configured to skip transmitting the first information on the resource element occupied by the CSI-RS transmission in the determined subframe for the enhanced transmission of the first information.

0340Further, the processor 30 is further configured to determine a subframe for the CSI-RS transmission; and the transmitter 31 is further configured to skip transmitting the first information in the subframe for the CSI-RS transmission.

0341Further, the processor 30 is specifically configured to determine an available CSI-RS configuration according to a preset rule, or set an available CSI-RS configuration, where the available CSI-RS configuration includes one or more CSI-RS configurations; the processor 30 is specifically configured to determine, according to the available CSI-RS configuration, the resource element occupied by the CSI-RS transmission; and the transmitter 31 is further configured to notify user equipment of the available CSI-RS configuration by using signaling.

0342Further, the processor 30 is specifically configured to determine an available CSI-RS subframe configuration according to a preset rule, or set an available CSI-RS subframe configuration, where the available CSI-RS subframe configuration includes one or more CSI-RS subframe configurations; the processor 30 is further configured to determine the subframe for the CSI-RS transmission according to the available CSI-RS subframe configuration; and the transmitter 31 is further configured to notify user equipment of the available CSI-RS subframe configuration by using signaling.

0343Further, the signaling includes: an MIB, a system information block SIB, Radio Resource Control RRC common signaling, RRC dedicated signaling, Media Access Control MAC signaling, or physical layer signaling.

0344The network device provided in this embodiment of the present invention includes a processor, configured to determine a subframe for enhanced transmission of first information, and a transmitter, configured to repeatedly transmit the first information multiple times in the determined subframe for the enhanced transmission of the first information, and skip CSI-RS transmission of a resource element occupied by the enhanced transmission of the first information, where the first information is an MIB, and a quantity of times of repeatedly transmitting the MIB in at least one radio frame is greater than one time; or the first information is an SIB 1, and a quantity of times of repeatedly transmitting the SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of repeatedly transmitting the first information in the determined subframe for the enhanced transmission of the first information is at least two times. According to the solution, a collision between the CSI-RS transmission and the enhanced transmission of the first information can be avoided, improving transmission reliability of the first information.

Embodiment 14

0345This embodiment of the present invention provides an information transmission device 4. As shown in <figref idref="f0010">FIG. 19</figref>, the device includes: <ul id="ul0048" list-style="none" compact="compact"><li>a processor 40, configured to determine a subframe for enhanced transmission of first information; and</li><li>a receiver 41, configured to receive, in the determined subframe for the enhanced transmission of the first information, the first information that is repeatedly transmitted multiple times, and skip CSI-RS transmission of a resource element occupied by the received first information that is repeatedly transmitted multiple times, where</li><li>the first information is an MIB, and a quantity of times of receiving the repeatedly transmitted MIB in at least one radio frame is greater than one time; or the first information is an SIB 1, and a quantity of times of receiving the repeatedly transmitted SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of receiving the repeatedly transmitted first information in the determined subframe for the enhanced transmission of the first information is at least two times.</li></ul>

0346Further, for an FDD system, the subframe for the enhanced transmission of the first information includes one or more subframes of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a TDD system, the subframe for the enhanced transmission of the first information includes one or more subframes of the subframe 0, a subframe 1, the subframe 5, and a subframe 6.

0347Further, for the FDD system, the subframe for the enhanced transmission of the first information includes the subframe 9; or the subframe for the enhanced transmission of the first information includes the subframe 4 and the subframe 9; and for the TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0; or the subframe for the enhanced transmission of the first information includes the subframe 0 and the subframe 5.

0348Further, the subframe for the enhanced transmission of the first information further includes: <ul id="ul0049" list-style="none" compact="compact"><li>for the FDD system, the subframe for the enhanced transmission of the first information further includes the subframe 0 and/or the subframe 5; and</li><li>for the TDD system, the subframe for the enhanced transmission of the first information further includes the subframe 1 and/or the subframe 6.</li></ul>

0349Further, for the FDD system, the subframe for the enhanced transmission of the first information includes the subframe 0, the subframe 4, the subframe 5, and the subframe 9; and for the TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0, the subframe 1, the subframe 5, and the subframe 6.

0350Further, the processor 40 is further configured to determine a resource element occupied by the CSI-RS transmission and a subframe for the CSI-RS transmission; and the receiver 41 is further configured to: if the subframe for the CSI-RS transmission collides with the subframe for the enhanced transmission of the first information, skip receiving the first information on the resource element occupied by the CSI-RS transmission in the determined subframe in which the enhanced transmission of the first information collides with the CSI-RS transmission.

0351Further, the processor 40 is further configured to determine a resource element occupied by the CSI-RS transmission; and the receiver 41 is further configured to skip receiving the first information on the resource element occupied by the CSI-RS transmission in the determined subframe for the enhanced transmission of the first information.

0352Further, the processor 40 is further configured to determine a subframe for the CSI-RS transmission; and the receiver 41 is further configured to skip receiving the first information in the subframe for the CSI-RS transmission.

0353Further, the processor 40 is specifically configured to determine an available CSI-RS configuration according to a preset rule, where the available CSI-RS configuration includes one or more CSI-RS configurations; the receiver 41 is further configured to receive signaling from a base station, where the signaling is used for notifying the available CSI-RS configuration; and the processor 40 is further configured to determine, according to the available CSI-RS configuration, the resource element occupied by the CSI-RS transmission.

0354Further, the processor 40 is specifically configured to determine an available CSI-RS subframe configuration according to a preset rule, where the available CSI-RS subframe configuration includes one or more CSI-RS subframe configurations; the receiver 41 is further configured to receive signaling from a base station, where the signaling is used for notifying the available CSI-RS subframe configuration; and the processor 40 is further configured to determine the subframe for the CSI-RS transmission according to the available CSI-RS subframe configuration.

0355Further, the signaling includes: an MIB, a system information block SIB, Radio Resource Control RRC common signaling, RRC dedicated signaling, Media Access Control MAC signaling, or physical layer signaling.

0356The information transmission device provided in this embodiment of the present invention includes a processor, configured to determine a subframe for enhanced transmission of first information, and a receiver, configured to receive, in the determined subframe for the enhanced transmission of the first information, the first information that is repeatedly transmitted multiple times, and skip CSI-RS transmission of a resource element occupied by the received first information that is repeatedly transmitted multiple times, where the first information is an MIB, and a quantity of times of receiving the repeatedly transmitted MIB in at least one radio frame is greater than one time; or the first information is an SIB 1, and a quantity of times of receiving the repeatedly transmitted SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of receiving the repeatedly transmitted first information in the determined subframe for the enhanced transmission of the first information is at least two times. According to the solution, a collision between the CSI-RS transmission and the enhanced transmission of the first information can be avoided, improving transmission reliability of the first information.

Embodiment 15

0357This embodiment of the present invention further provides an information transmission system, including the base station having any feature described above and the user equipment having any feature described above.

0358The information transmission system provided in this embodiment of the present invention includes the base station having any feature described above and the user equipment having any feature described above. According to the solution, a collision between CSI-RS transmission and enhanced transmission of first information can be avoided, improving transmission reliability of the first information.

Embodiment 16

0359This embodiment of the present invention provides an information transmission method. As shown in <figref idref="f0010">FIG. 20</figref>, the method includes:

0360S1501: A base station determines a subframe for enhanced transmission of first information, where the first information is a master information block, or the first information is an SIB including a TDD configuration, or the first information is an SIB including an MBSFN subframe configuration.

0361In the prior art, in the case of coverage enhancement, UE that requires coverage enhancement cannot learn a TDD configuration and an MBSFN subframe configuration before receiving an SIB 1 and an SIB 2. Therefore, when enhanced transmission is performed on first information, a subframe used in the enhanced transmission cannot be determined, thereby lowering transmission reliability of the first information. This embodiment of the present invention provides an information transmission method, which can determine a subframe used in enhanced transmission of first information, improving transmission reliability of the first information.

0362First, the base station determines the subframe for the enhanced transmission of the first information.

0363The first information is a master information block, or the first information is an SIB including a TDD configuration, or the first information is an SIB including an MBSFN subframe configuration.

0364It should be noted that, the SIB including the TDD configuration is not limited to only the SIB 1, and may also be another SIB x including the TDD configuration; similarly, the SIB including the MBSFN subframe configuration is not limited to only the SIB 2, either, and may also be another SIB y including the TDD configuration, where x and y both are positive integers. Generally, a value of x of the SIB x including the TDD configuration is not equal to a value of y of the SIB y including the MBSFN subframe configuration, but particularly, the value of x may also be equal to the value of y, which is not limited in the present invention.

0365It should be further noted that, the subframe for the enhanced transmission of the first information includes any one of or a combination of the following, and there are at least one subframe for the enhanced transmission of the first information: <ul id="ul0050" list-style="none" compact="compact"><li>the subframe for the enhanced transmission of the first information is a subframe in an enhanced transmission opportunity of the first information or a subframe in an enhanced transmission bundle of the first information;</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one radio frame; and</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one system information window.</li></ul>

0366Particularly, for an FDD system or a Half FDD system, the subframe for the enhanced transmission of the first information includes one or more of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0 and/or the subframe 5.

0367Further, for the TDD system, if the first information is an SIB including an MBSFN subframe configuration and a subframe 6 is not a special subframe, the subframe for the enhanced transmission of the first information further includes the subframe 6.

0368The subframe 0 is a subframe 0 in each radio frame in at least one radio frame, or a subframe 0 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 0 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 4 is a subframe 4 in each radio frame in at least one radio frame, or a subframe 4 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 4 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 5 is a subframe 5 in each radio frame in at least one radio frame, or a subframe 5 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 5 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 6 is a subframe 6 in each radio frame in at least one radio frame, or a subframe 6 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 6 in each odd-numbered radio frame in at least one odd-numbered radio frame; and the subframe 9 is a subframe 9 in each radio frame in at least one radio frame, or a subframe 9 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 9 in each odd-numbered radio frame in at least one odd-numbered radio frame.

0369S1502: The base station performs the enhanced transmission of the first information in the determined subframe for the enhanced transmission of the first information.

0370After determining the subframe for the enhanced transmission of the first information, the base station performs the enhanced transmission of the first information in the determined subframe for the enhanced transmission of the first information.

0371It should be noted that, when the base station performs the enhanced transmission of the first information in the determined subframe for the enhanced transmission of the first information, according to different types of the first information, specific manners of transmitting the first information are different. If the first information is a master information block, the base station performs the enhanced transmission of the master information block in at least one radio frame a quantity of times that is greater than one time; if the first information is an SIB including a TDD configuration, the base station performs the enhanced transmission of the SIB in at least two consecutive radio frames a quantity of times that is greater than one time; or if the first information is an SIB including an MBSFN subframe configuration, the base station performs the enhanced transmission of the SIB in the determined subframe for the enhanced transmission of the first information a quantity of times that is at least two times.

0372It should be additionally noted that, for the enhanced transmission of the first information provided in this embodiment of the present invention, the mentioned quantity of times of the enhanced transmission includes initial transmission of the first information. For example, the enhanced transmission being 1 indicates that the first information is transmitted only one time, that is, there is no additional repeatedly transmitting the first information; and the enhanced transmission being 2 indicates that the first information is transmitted two times, that is, there is additional one time of repeatedly transmitting the first information.

0373This embodiment of the present invention provides an information transmission method, where a subframe for enhanced transmission of first information is determined, where the first information is a master information block, or the first information is an SIB including a TDD configuration, or the first information is an SIB including an MBSFN subframe configuration, and the enhanced transmission of the first information is performed in the determined subframe for the enhanced transmission of the first information. According to the solution, the subframe used in the enhanced transmission of the first information can be determined, improving transmission reliability of the first information.

Embodiment 17

0374This embodiment of the present invention provides an information transmission method. As shown in <figref idref="f0011">FIG. 21</figref>, the method includes:

0375S1601: Abase station determines a subframe for enhanced transmission of first information, where the first information is a master information block, or the first information is an SIB including a TDD configuration, or the first information is an SIB including an MBSFN subframe configuration.

0376This embodiment of the present invention provides an information transmission method, which can determine a subframe used in enhanced transmission of first information, improving transmission reliability of the first information.

0377First, the base station determines the subframe for the enhanced transmission of the first information. The first information is a master information block, or the first information is an SIB including a TDD configuration, or the first information is an SIB including an MBSFN subframe configuration.

0378It should be noted that, the SIB including the TDD configuration is not limited to only the SIB 1, and may also be another SIB x including the TDD configuration; similarly, the SIB including the MBSFN subframe configuration is not limited to only the SIB 2, either, and may also be another SIB y including the TDD configuration, where x and y both are positive integers. Generally, a value of x of the SIB x including the TDD configuration is not equal to a value of y of the SIB y including the MBSFN subframe configuration, but particularly, the value of x may also be equal to the value of y, which is not limited in the present invention.

0379It should be further noted that, the subframe for the enhanced transmission of the first information includes any one of or a combination of the following: <ul id="ul0051" list-style="none" compact="compact"><li>the subframe for the enhanced transmission of the first information is a subframe in an enhanced transmission opportunity of the first information or a subframe in an enhanced transmission bundle of the first information;</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one radio frame; and</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one system information window.</li></ul>

0380Particularly, for an FDD system or a Half FDD system, the subframe for the enhanced transmission of the first information includes one or more of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0 and/or the subframe 5.

0381Further, for the TDD system, if the first information is an SIB including an MBSFN subframe configuration and a subframe 6 is not a special subframe, the subframe for the enhanced transmission of the first information further includes the subframe 6.

0382In an existing LTE or LTE-A system, time-domain resources are divided as radio frames, and the radio frames are numbered 0 to 1023. One radio frame includes 10 subframes, a time length of one subframe is 1 ms, and subframes in each radio frame are numbered 0 to 9.

0383For the FDD system or the Half FDD system, it can be determined that the subframe 0, the subframe 4, the subframe 5, and the subframe 9 are surely not MBSFN subframes; therefore, the subframe for the enhanced transmission of the first information is surely one or more of the subframe 0, the subframe 4, the subframe 5, and the subframe 9. For the TDD system, the subframe 0, the subframe 1, the subframe 5, and the subframe 6 are surely not MBSFN subframes, but the subframe 1 is surely a special subframe and the subframe 6 may be a special subframe; therefore, the subframe for the enhanced transmission of the first information is surely the subframe 0 and/or the subframe 5 and may further include the subframe 6.

0384Exemplarily, for the TDD system, if the subframe 0, the subframe 1, a subframe 2, and the subframe 6 are subframes in uplink and downlink configurations of the TDD system, the subframe 6 is also a special subframe. Therefore, the subframe for the enhanced transmission of the first information can only be the subframe 0 and/or the subframe 5. If a subframe 3, the subframe 4, and the subframe 5 are subframes in uplink and downlink configurations of the TDD system, and the subframe 6 is a subframe in only the downlink configuration of the TDD system, the subframe 6 is not a special subframe. Therefore, the subframe for the enhanced transmission of the first information may be one or more of the subframe 0, the subframe 5, and the subframe 6.

0385The subframe 0 is a subframe 0 in each radio frame in at least one radio frame, or a subframe 0 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 0 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 4 is a subframe 4 in each radio frame in at least one radio frame, or a subframe 4 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 4 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 5 is a subframe 5 in each radio frame in at least one radio frame, or a subframe 5 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 5 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 6 is a subframe 6 in each radio frame in at least one radio frame, or a subframe 6 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 6 in each odd-numbered radio frame in at least one odd-numbered radio frame; and the subframe 9 is a subframe 9 in each radio frame in at least one radio frame, or a subframe 9 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 9 in each odd-numbered radio frame in at least one odd-numbered radio frame.

0386S1602: The base station determines a redundancy version RV, in a (rep_index+1)^th time of enhanced transmission, of the first information.<maths id="math0007"><math display="block"><mrow><mi>RV index</mi><mo>=</mo><mi>ceil</mi><mfenced><msub><mrow><mmultiscripts><mrow><mo>/</mo></mrow><mprescripts /><none /><mn>3</mn></mmultiscripts></mrow><mn>2</mn></msub><mo>*</mo><mfenced open="{" close="}"><mrow><mi>rep_index mod</mi><mspace width="1em" /></mrow><mn>4</mn></mfenced></mfenced><mspace width="1em" /><mi>mod</mi><mspace width="1em" /><mn>4</mn><mo>,</mo></mrow></math><img file="EP3852284A1_D0007.tif" /></maths> Ceil(<i>x</i>) is a round-up function, rep_index is a number of a quantity of times of the enhanced transmission of the first information, and mod is a modulo operation; or the RV is determined in an order of 0, 2, 3, and 1 according to an index of a quantity of times of the enhanced transmission.

0387After the base station determines the subframe for the enhanced transmission of the first information, a redundancy version RV of the first information during the enhanced transmission of the first information varies according to a quantity of times of the enhanced transmission of the first information, so that a format stipulated by the redundancy version RV is used for the first information, and the enhanced transmission of the first information is performed in the determined subframe for the enhanced transmission of the first information.

0388S1603: The base station performs the enhanced transmission of the first information in the determined subframe for the enhanced transmission of the first information.

0389Specifically, step S1603 of performing, by the base station, the enhanced transmission of the first information in the determined subframe for the enhanced transmission of the first information may include steps S1603a to S1603c:

0390S1603a: If the first information is a master information block, the base station performs the enhanced transmission of the master information block in at least one radio frame a quantity of times that is greater than one time.

0391S1603b: If the first information is an SIB including a TDD configuration, the base station performs the enhanced transmission of the SIB in at least two consecutive radio frames a quantity of times that is greater than one time.

0392S1603c: If the first information is an SIB including an MBSFN subframe configuration, the base station performs the enhanced transmission of the SIB in the determined subframe for the enhanced transmission of the first information a quantity of times that is at least two times.

0393It should be noted that, to avoid a collision between the enhanced transmission of the first information and enhanced transmission of a paging message and/or a random access response message, when the enhanced transmission of the first information is scheduled based on a control channel, additional enhanced transmission of a paging message and/or a random access response message is not performed in the determined subframe for the enhanced transmission of the first information; and when the enhanced transmission of the first information is not scheduled based on a control channel, on a small-bandwidth carrier, the additional enhanced transmission of the paging message and/or the random access response message is not performed in the determined subframe for the enhanced transmission of the first information, where the small-bandwidth carrier includes at least a carrier of 1.4 MHz and/or a carrier of 3 MHz.

0394It should be further noted that, according to types of the first information, a priority relationship exists between the enhanced transmission of the first information and enhanced transmission of other information: <ul id="ul0052" list-style="none" compact="compact"><li>if the first information is an SIB including a TDD configuration, the enhanced transmission of the first information is after enhanced transmission of a master information block, and a preset first time offset exists between the enhanced transmission of the first information and the enhanced transmission of the master information block; and</li><li>if the first information is an SIB including an MBSFN subframe configuration, the enhanced transmission of the first information is after enhanced transmission of an SIB including a TDD configuration, and a preset second time offset exists between the enhanced transmission of the first information and the enhanced transmission of the SIB including the TDD configuration, where</li><li>the preset first time offset and the preset second time offset both are constant time offset values, and the preset first time offset may be equal to the preset second time offset, or the preset first time offset may be not equal to the preset second time offset, which is not limited in the present invention.</li></ul>

0395This embodiment of the present invention provides an information transmission method, where a subframe for enhanced transmission of first information is determined, where the first information is a master information block, or the first information is a system information block SIB including a time division duplex TDD configuration, or the first information is an SIB including a multicast-broadcast single-frequency network MBSFN subframe configuration, and the enhanced transmission of the first information is performed in the determined subframe for the enhanced transmission of the first information. According to the solution, the subframe used in the enhanced transmission of the first information can be determined, improving transmission reliability of the first information.

Embodiment 18

0396This embodiment of the present invention provides an information transmission method. As shown in <figref idref="f0011">FIG. 22</figref>, the method includes:

0397S1701: User equipment determines a subframe for enhanced transmission of first information, where the first information is a master information block, or the first information is an SIB including a TDD configuration, or the first information is an SIB including an MBSFN subframe configuration.

0398This embodiment of the present invention provides an information transmission method, which can determine a subframe used in enhanced transmission of first information, improving transmission reliability of the first information.

0399First, the user equipment determines the subframe for the enhanced transmission of the first information.

0400The first information is a master information block, or the first information is an SIB including a TDD configuration, or the first information is an SIB including an MBSFN subframe configuration.

0401It should be noted that, the SIB including the TDD configuration is not limited to only the SIB 1, and may also be another SIB x including the TDD configuration; similarly, the SIB including the MBSFN subframe configuration is not limited to only the SIB 2, either, and may also be another SIB y including the TDD configuration, where x and y both are positive integers. Generally, a value of x of the SIB x including the TDD configuration is not equal to a value of y of the SIB y including the MBSFN subframe configuration, but particularly, the value of x may also be equal to the value of y, which is not limited in the present invention.

0402It should be further noted that, the subframe for the enhanced transmission of the first information includes any one of or a combination of the following, and there are at least one subframe for the enhanced transmission of the first information: <ul id="ul0053" list-style="none" compact="compact"><li>the subframe for the enhanced transmission of the first information is a subframe in an enhanced transmission opportunity of the first information or a subframe in an enhanced transmission bundle of the first information;</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one radio frame; and</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one system information window.</li></ul>

0403Particularly, for an FDD system or a Half FDD system, the subframe for the enhanced transmission of the first information includes one or more of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0 and/or the subframe 5.

0404Further, for the TDD system, if the first information is an SIB including an MBSFN subframe configuration and a subframe 6 is not a special subframe, the subframe for the enhanced transmission of the first information further includes the subframe 6.

0405The subframe 0 is a subframe 0 in each radio frame in at least one radio frame, or a subframe 0 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 0 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 4 is a subframe 4 in each radio frame in at least one radio frame, or a subframe 4 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 4 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 5 is a subframe 5 in each radio frame in at least one radio frame, or a subframe 5 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 5 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 6 is a subframe 6 in each radio frame in at least one radio frame, or a subframe 6 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 6 in each odd-numbered radio frame in at least one odd-numbered radio frame; and the subframe 9 is a subframe 9 in each radio frame in at least one radio frame, or a subframe 9 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 9 in each odd-numbered radio frame in at least one odd-numbered radio frame.

0406S1702: The user equipment receives the first information in the determined subframe for the enhanced transmission of the first information.

0407After determining the subframe for the enhanced transmission of the first information, the user equipment receives the first information in the determined subframe for the enhanced transmission of the first information.

0408It should be noted that, when the user equipment receives the first information in the determined subframe for the enhanced transmission of the first information, according to different types of the first information, specific manners of receiving the first information are different. If the first information is a master information block, the user equipment receives the master information block in at least one radio frame a quantity of times that is greater than one time; if the first information is an SIB including a TDD configuration, the user equipment receives the SIB in at least two consecutive radio frames a quantity of times that is greater than one time; or if the first information is an SIB including an MB SFN subframe configuration, the user equipment receives the SIB in the determined subframe for the enhanced transmission of the first information a quantity of times that is at least two times.

0409It should be additionally noted that, for the enhanced transmission of the first information provided in this embodiment of the present invention, the mentioned quantity of times of the enhanced transmission includes initial transmission of the first information. For example, the enhanced transmission being 1 indicates that the first information is transmitted only one time, that is, there is no additional repeatedly transmitting the first information; and the enhanced transmission being 2 indicates that the first information is transmitted two times, that is, there is additional one time of repeatedly transmitting the first information.

0410This embodiment of the present invention provides an information transmission method, where a subframe for enhanced transmission of first information is determined, where the first information is a master information block, or the first information is an SIB including a TDD configuration, or the first information is an SIB including an MBSFN subframe configuration, and the first information is received in the determined subframe for the enhanced transmission of the first information. According to the solution, the subframe used in the enhanced transmission of the first information can be determined, improving transmission reliability of the first information.

Embodiment 19

0411This embodiment of the present invention provides an information transmission method. As shown in <figref idref="f0012">FIG. 23</figref>, the method includes:

0412S1801: User equipment determines a subframe for enhanced transmission of first information, where the first information is a master information block, or the first information is an SIB including a TDD configuration, or the first information is an SIB including an MBSFN subframe configuration.

0413This embodiment of the present invention provides an information transmission method, which can determine a subframe used in enhanced transmission of first information, improving transmission reliability of the first information.

0414First, the user equipment determines the subframe for the enhanced transmission of the first information. The first information is a master information block, or the first information is an SIB including a TDD configuration, or the first information is an SIB including an MBSFN subframe configuration.

0415It should be noted that, the SIB including the TDD configuration is not limited to only the SIB 1, and may also be another SIB x including the TDD configuration; similarly, the SIB including the MBSFN subframe configuration is not limited to only the SIB 2, either, and may also be another SIB y including the TDD configuration, where x and y both are positive integers. Generally, a value of x of the SIB x including the TDD configuration is not equal to a value of y of the SIB y including the MBSFN subframe configuration, but particularly, the value of x may also be equal to the value of y, which is not limited in the present invention.

0416It should be further noted that, the subframe for the enhanced transmission of the first information includes any one of or a combination of the following: <ul id="ul0054" list-style="none" compact="compact"><li>the subframe for the enhanced transmission of the first information is a subframe in an enhanced transmission opportunity of the first information or a subframe in an enhanced transmission bundle of the first information;</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one radio frame; and</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one system information window.</li></ul>

0417Particularly, for an FDD system or a Half FDD system, the subframe for the enhanced transmission of the first information includes one or more of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0 and/or the subframe 5.

0418Further, for the TDD system, if the first information is an SIB including an MBSFN subframe configuration and a subframe 6 is not a special subframe, the subframe for the enhanced transmission of the first information further includes the subframe 6.

0419In an existing LTE or LTE-A system, time-domain resources are divided as radio frames, and the radio frames are numbered 0 to 1023. One radio frame includes 10 subframes, a time length of one subframe is 1 ms, and subframes in each radio frame are numbered 0 to 9.

0420For the FDD system or the Half FDD system, it can be determined that the subframe 0, the subframe 4, the subframe 5, and the subframe 9 are surely not MBSFN subframes; therefore, the subframe for the enhanced transmission of the first information is surely one or more of the subframe 0, the subframe 4, the subframe 5, and the subframe 9. For the TDD system, the subframe 0, the subframe 1, the subframe 5, and the subframe 6 are surely not MBSFN subframes, but the subframe 1 is surely a special subframe and the subframe 6 may be a special subframe; therefore, the subframe for the enhanced transmission of the first information is surely the subframe 0 and/or the subframe 5 and may further include the subframe 6.

0421Exemplarily, for the TDD system, if the subframe 0, the subframe 1, a subframe 2, and the subframe 6 are subframes in uplink and downlink configurations of the TDD system, the subframe 6 is also a special subframe. Therefore, the subframe for the enhanced transmission of the first information can only be the subframe 0 and/or the subframe 5. If a subframe 3, the subframe 4, and the subframe 5 are subframes in uplink and downlink configurations of the TDD system, and the subframe 6 is a subframe in only the downlink configuration of the TDD system, the subframe 6 is not a special subframe. Therefore, the subframe for the enhanced transmission of the first information may be one or more of the subframe 0, the subframe 5, and the subframe 6.

0422The subframe 0 is a subframe 0 in each radio frame in at least one radio frame, or a subframe 0 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 0 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 4 is a subframe 4 in each radio frame in at least one radio frame, or a subframe 4 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 4 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 5 is a subframe 5 in each radio frame in at least one radio frame, or a subframe 5 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 5 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 6 is a subframe 6 in each radio frame in at least one radio frame, or a subframe 6 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 6 in each odd-numbered radio frame in at least one odd-numbered radio frame; and the subframe 9 is a subframe 9 in each radio frame in at least one radio frame, or a subframe 9 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 9 in each odd-numbered radio frame in at least one odd-numbered radio frame.

0423S1802: The user equipment determines a redundancy version RV, in a (rep_index+1)^th time of enhanced transmission, of the first information.<maths id="math0008"><math display="block"><mrow><mi>RV index</mi><mo>=</mo><mi>ceil</mi><mfenced><msub><mrow><mmultiscripts><mrow><mo>/</mo></mrow><mprescripts /><none /><mn>3</mn></mmultiscripts></mrow><mn>2</mn></msub><mo>*</mo><mfenced open="{" close="}"><mrow><mi>rep_index mod</mi><mspace width="1em" /></mrow><mn>4</mn></mfenced></mfenced><mspace width="1em" /><mi>mod</mi><mspace width="1em" /><mn>4</mn><mo>,</mo></mrow></math><img file="EP3852284A1_D0008.tif" /></maths> Ceil(<i>x</i>) is a round-up function, rep_index is a number of a quantity of times of the enhanced transmission of the first information, and mod is a modulo operation; or the RV is determined in an order of 0, 2, 3, and 1 according to an index of a quantity of times of the enhanced transmission.

0424After the user equipment determines the subframe for the enhanced transmission of the first information, a redundancy version RV of the first information during the enhanced transmission of the first information varies according to a quantity of times of the enhanced transmission of the first information, so that a format stipulated by the redundancy version RV is used for the first information, and the first information is received in the determined subframe for the enhanced transmission of the first information.

0425S1803: The user equipment receives the first information in the determined subframe for the enhanced transmission of the first information.

0426Specifically, step S1803 of receiving, by the user equipment, the first information in the determined subframe for the enhanced transmission of the first information may include steps S1803a to S1803c:

0427S1803a: If the first information is a master information block, the user equipment receives the master information block in at least one radio frame a quantity of times that is greater than one time.

0428S1803b: If the first information is an SIB including a TDD configuration, the user equipment receives the SIB in at least two consecutive radio frames a quantity of times that is greater than one time.

0429S1803c: If the first information is an SIB including an MBSFN subframe configuration, the user equipment receives the SIB in the determined subframe for the enhanced transmission of the first information a quantity of times that is at least two times.

0430It should be noted that, to avoid a collision between the enhanced transmission of the first information and enhanced transmission of a paging message and/or a random access response message, when the enhanced transmission of the first information is scheduled based on a control channel, a paging message and/or a random access response message on which additional enhanced transmission is performed is not received in the determined subframe for the enhanced transmission of the first information; and when the enhanced transmission of the first information is not scheduled based on a control channel, on a small-bandwidth carrier, the paging message and/or the random access response message on which the additional enhanced transmission is performed is not received in the determined subframe for the enhanced transmission of the first information, where the small-bandwidth carrier includes at least a carrier of 1.4 MHz and/or a carrier of 3 MHz.

0431It should be further noted that, according to types of the first information, a priority relationship exists between the enhanced transmission of the first information and enhanced transmission of other information: <ul id="ul0055" list-style="none" compact="compact"><li>if the first information is an SIB including a TDD configuration, the receiving of the first information is after receiving of a master information block, and a preset first time offset exists between the receiving of the first information and the receiving of the master information block; and</li><li>if the first information is an SIB including an MBSFN subframe configuration, the receiving of the first information is after receiving of an SIB including a TDD configuration, and a preset second time offset exists between the receiving of the first information and the receiving of the SIB including the TDD configuration, where</li><li>the preset first time offset and the preset second time offset both are constant time offset values, and the preset first time offset may be equal to the preset second time offset, or the preset first time offset may be not equal to the preset second time offset, which is not limited in the present invention.</li></ul>

0432This embodiment of the present invention provides an information transmission method, where a subframe for enhanced transmission of first information is determined, where the first information is a master information block, or the first information is an SIB including a TDD configuration, or the first information is an SIB including an MBSFN subframe configuration, and the first information is received in the determined subframe for the enhanced transmission of the first information. According to the solution, the subframe used in the enhanced transmission of the first information can be determined, improving transmission reliability of the first information.

Embodiment 20

0433This embodiment of the present invention provides an information transmission apparatus. As shown in <figref idref="f0012">FIG. 24</figref>, the information transmission apparatus includes a determining module 50 and a sending module 51, where the determining module 50 is configured to determine a subframe for enhanced transmission of first information, where the first information is a master information block, or the first information is a system information block SIB including a time division duplex TDD configuration, or the first information is an SIB including a multicast-broadcast single-frequency network MBSFN subframe configuration; and the sending module 51 is configured to: after the determining module 50 determines the subframe for the enhanced transmission of the first information, perform the enhanced transmission of the first information in the determined subframe for the enhanced transmission of the first information.

0434Further, the sending module 51 is specifically configured to: if the first information is a master information block, perform the enhanced transmission of the master information block in at least one radio frame a quantity of times that is greater than one time; if the first information is an SIB including a TDD configuration, perform the enhanced transmission of the SIB in at least two consecutive radio frames a quantity of times that is greater than one time; or if the first information is an SIB including an MBSFN subframe configuration, perform the enhanced transmission of the SIB in the determined subframe for the enhanced transmission of the first information a quantity of times that is at least two times.

0435Further, for a frequency division duplex FDD system or a half frequency division duplex Half FDD system, the subframe for the enhanced transmission of the first information includes one or more of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0 and/or the subframe 5.

0436Further, for the TDD system, if the first information is an SIB including an MBSFN subframe configuration and a subframe 6 is not a special subframe, the subframe for the enhanced transmission of the first information further includes the subframe 6.

0437Further, the subframe 0 is a subframe 0 in each radio frame in at least one radio frame, or a subframe 0 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 0 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 4 is a subframe 4 in each radio frame in at least one radio frame, or a subframe 4 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 4 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 5 is a subframe 5 in each radio frame in at least one radio frame, or a subframe 5 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 5 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 6 is a subframe 6 in each radio frame in at least one radio frame, or a subframe 6 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 6 in each odd-numbered radio frame in at least one odd-numbered radio frame; and the subframe 9 is a subframe 9 in each radio frame in at least one radio frame, or a subframe 9 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 9 in each odd-numbered radio frame in at least one odd-numbered radio frame.

0438Further, when the enhanced transmission of the first information is scheduled based on a control channel, additional enhanced transmission of a paging message and/or a random access response message is not performed in the determined subframe for the enhanced transmission of the first information; and when the enhanced transmission of the first information is not scheduled based on a control channel, on a small-bandwidth carrier, the additional enhanced transmission of the paging message and/or the random access response message is not performed in the determined subframe for the enhanced transmission of the first information, where the small-bandwidth carrier includes at least a carrier of 1.4 MHz and/or a carrier of 3 MHz.

0439Further, if the first information is an SIB including a TDD configuration, the enhanced transmission of the first information is after enhanced transmission of a master information block, and a preset first time offset exists between the enhanced transmission of the first information and the enhanced transmission of the master information block; and if the first information is an SIB including an MBSFN subframe configuration, the enhanced transmission of the first information is after enhanced transmission of an SIB including a TDD configuration, and a preset second time offset exists between the enhanced transmission of the first information and the enhanced transmission of the SIB including the TDD configuration, where

0440Further, the determining module 50 is further configured to determine a redundancy version RV, in a (rep_index+1)^th time of enhanced transmission, of the first information, where <maths id="math0009"><math display="block"><mrow><mi>RV index</mi><mo>=</mo><mi>ceil</mi><mfenced><mmultiscripts><mrow><msub><mrow><mo>/</mo></mrow><mn>2</mn></msub></mrow><mprescripts /><none /><mn>3</mn></mmultiscripts><mo>*</mo><mfenced open="{" close="}"><mrow><mi>rep_index mod</mi><mspace width="1em" /></mrow><mn>4</mn></mfenced></mfenced><mspace width="1em" /><mi>mod</mi><mspace width="1em" /><mn>4</mn><mo>,</mo></mrow></math><img file="EP3852284A1_D0009.tif" /></maths> ceil(<i>x</i>) is a round-up function, rep_index is a number of a quantity of times of the enhanced transmission of the first information, and mod is a modulo operation; or the RV is determined in an order of 0, 2, 3, and 1 according to an index of a quantity of times of the enhanced transmission.

0441Further, the subframe for the enhanced transmission of the first information includes any one of or a combination of the following: <ul id="ul0056" list-style="none" compact="compact"><li>the subframe for the enhanced transmission of the first information is a subframe in an enhanced transmission opportunity of the first information or a subframe in an enhanced transmission bundle of the first information;</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one radio frame; and</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one system information window.</li></ul>

0442This embodiment of the present invention provides an information transmission apparatus, including a determining module and a sending module, where the determining module is configured to determine a subframe for enhanced transmission of first information, where the first information is a master information block, or the first information is a system information block SIB including a time division duplex TDD configuration, or the first information is an SIB including a multicast-broadcast single-frequency network MBSFN subframe configuration; and the sending module is configured to: after the determining module determines the subframe for the enhanced transmission of the first information, perform the enhanced transmission of the first information in the determined subframe for the enhanced transmission of the first information. According to the solution, the subframe used in the enhanced transmission of the first information can be determined, improving transmission reliability of the first information.

Embodiment 21

0443This embodiment of the present invention provides another information transmission apparatus. As shown in <figref idref="f0013">FIG. 25</figref>, the information transmission apparatus includes a determining module 60 and a receiving module 61, where the determining module 60 is configured to determine a subframe for enhanced transmission of first information, where the first information is a master information block, or the first information is an SIB including a TDD configuration, or the first information is an SIB including an MBSFN subframe configuration; and the receiving module 61 is configured to: after the determining module 60 determines the subframe for the enhanced transmission of the first information, receive the first information in the determined subframe for the enhanced transmission of the first information.

0444Further, the receiving module 61 is specifically configured to: if the first information is a master information block, receive the master information block in at least one radio frame a quantity of times that is greater than one time; if the first information is an SIB including a TDD configuration, receive the SIB in at least two consecutive radio frames a quantity of times that is greater than one time; or if the first information is an SIB including an MBSFN subframe configuration, receive the SIB in the determined subframe for the enhanced transmission of the first information a quantity of times that is at least two times.

0445Further, for an FDD system or a Half FDD system, the subframe for the enhanced transmission of the first information includes one or more of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0 and/or the subframe 5.

0446Further, for the TDD system, if the first information is an SIB including an MBSFN subframe configuration and a subframe 6 is not a special subframe, the subframe for the enhanced transmission of the first information further includes the subframe 6.

0447Further, the subframe 0 is a subframe 0 in each radio frame in at least one radio frame, or a subframe 0 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 0 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 4 is a subframe 4 in each radio frame in at least one radio frame, or a subframe 4 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 4 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 5 is a subframe 5 in each radio frame in at least one radio frame, or a subframe 5 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 5 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 6 is a subframe 6 in each radio frame in at least one radio frame, or a subframe 6 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 6 in each odd-numbered radio frame in at least one odd-numbered radio frame; and the subframe 9 is a subframe 9 in each radio frame in at least one radio frame, or a subframe 9 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 9 in each odd-numbered radio frame in at least one odd-numbered radio frame.

0448Further, when the enhanced transmission of the first information is scheduled based on a control channel, a paging message and/or a random access response message on which additional enhanced transmission is performed is not received in the determined subframe for the enhanced transmission of the first information; and when the enhanced transmission of the first information is not scheduled based on a control channel, on a small-bandwidth carrier, the paging message and/or the random access response message on which the additional enhanced transmission is performed is not received in the determined subframe for the enhanced transmission of the first information, where the small-bandwidth carrier includes at least a carrier of 1.4 MHz and/or a carrier of 3 MHz.

0449Further, if the first information is an SIB including a TDD configuration, the receiving of the first information is after receiving of a master information block, and a preset first time offset exists between the receiving of the first information and the receiving of the master information block; and if the first information is an SIB including an MBSFN subframe configuration, the receiving of the first information is after receiving of an SIB including a TDD configuration, and a preset second time offset exists between the receiving of the first information and the receiving of the SIB including the TDD configuration.

0450Further, the determining module 60 is further configured to determine a redundancy version RV, in a (rep_index+1)^th time of enhanced transmission, of the first information, where <maths id="math0010"><math display="block"><mrow><mi>RV index</mi><mo>=</mo><mi>ceil</mi><mfenced><mmultiscripts><mrow><mo>/</mo><mn>2</mn></mrow><mprescripts /><none /><mn>3</mn></mmultiscripts><mo>*</mo><mfenced open="{" close="}"><mrow><mi>rep_index mod</mi><mspace width="1em" /></mrow><mn>4</mn></mfenced></mfenced><mspace width="1em" /><mi>mod</mi><mspace width="1em" /><mn>4</mn><mo>,</mo></mrow></math><img file="EP3852284A1_D0010.tif" /></maths> ceil(<i>x</i>) is a round-up function, rep_index is a number of a quantity of times of the enhanced transmission of the first information, and mod is a modulo operation; or the RV is determined in an order of 0, 2, 3, and 1 according to an index of a quantity of times of the enhanced transmission.

0451Further, the subframe for the enhanced transmission of the first information includes any one of or a combination of the following: <ul id="ul0057" list-style="none" compact="compact"><li>the subframe for the enhanced transmission of the first information is a subframe in an enhanced transmission opportunity of the first information or a subframe in an enhanced transmission bundle of the first information;</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one radio frame; and</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one system information window.</li></ul>

0452This embodiment of the present invention provides an information transmission apparatus, including a determining module and a receiving module, where the determining module is configured to determine a subframe for enhanced transmission of first information, where the first information is a master information block, or the first information is an SIB including a TDD configuration, or the first information is an SIB including an MBSFN subframe configuration; and the receiving module is configured to: after the determining module determines the subframe for the enhanced transmission of the first information, receive the first information in the determined subframe for the enhanced transmission of the first information. According to the solution, the subframe used in the enhanced transmission of the first information can be determined, improving transmission reliability of the first information.

Embodiment 22

0453This embodiment of the present invention provides a network device. As shown in <figref idref="f0013">FIG. 26</figref>, the network device includes a processor 70 and a transmitter 71, where the processor 70 is configured to determine a subframe for enhanced transmission of first information, where the first information is a master information block, or the first information is a system information block SIB including a time division duplex TDD configuration, or the first information is an SIB including a multicast-broadcast single-frequency network MBSFN subframe configuration; and the transmitter 71 is configured to: after the processor 70 determines the subframe for the enhanced transmission of the first information, perform the enhanced transmission of the first information in the determined subframe for the enhanced transmission of the first information.

0454Further, the transmitter 71 is specifically configured to: if the first information is a master information block, perform the enhanced transmission of the master information block in at least one radio frame a quantity of times that is greater than one time; if the first information is an SIB including a TDD configuration, perform the enhanced transmission of the SIB in at least two consecutive radio frames a quantity of times that is greater than one time; or if the first information is an SIB including an MBSFN subframe configuration, perform the enhanced transmission of the SIB in the determined subframe for the enhanced transmission of the first information a quantity of times that is at least two times.

0455Further, for an FDD system or a Half FDD system, the subframe for the enhanced transmission of the first information includes one or more of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0 and/or the subframe 5.

0456Further, for the TDD system, if the first information is an SIB including an MBSFN subframe configuration and a subframe 6 is not a special subframe, the subframe for the enhanced transmission of the first information further includes the subframe 6.

0457Further, the subframe 0 is a subframe 0 in each radio frame in at least one radio frame, or a subframe 0 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 0 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 4 is a subframe 4 in each radio frame in at least one radio frame, or a subframe 4 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 4 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 5 is a subframe 5 in each radio frame in at least one radio frame, or a subframe 5 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 5 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 6 is a subframe 6 in each radio frame in at least one radio frame, or a subframe 6 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 6 in each odd-numbered radio frame in at least one odd-numbered radio frame; and the subframe 9 is a subframe 9 in each radio frame in at least one radio frame, or a subframe 9 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 9 in each odd-numbered radio frame in at least one odd-numbered radio frame.

0458Further, when the enhanced transmission of the first information is scheduled based on a control channel, additional enhanced transmission of a paging message and/or a random access response message is not performed in the determined subframe for the enhanced transmission of the first information; and when the enhanced transmission of the first information is not scheduled based on a control channel, on a small-bandwidth carrier, the additional enhanced transmission of the paging message and/or the random access response message is not performed in the determined subframe for the enhanced transmission of the first information, where the small-bandwidth carrier includes at least a carrier of 1.4 MHz and/or a carrier of 3 MHz.

0459Further, if the first information is an SIB including a TDD configuration, the enhanced transmission of the first information is after enhanced transmission of a master information block, and a preset first time offset exists between the enhanced transmission of the first information and the enhanced transmission of the master information block; and if the first information is an SIB including an MBSFN subframe configuration, the enhanced transmission of the first information is after enhanced transmission of an SIB including a TDD configuration, and a preset second time offset exists between the enhanced transmission of the first information and the enhanced transmission of the SIB including the TDD configuration.

0460Further, the processor 70 is further configured to determine a redundancy version RV, in a (rep_index+1)^th time of enhanced transmission, of the first information, where <maths id="math0011"><math display="block"><mrow><mi>RV index</mi><mo>=</mo><mi>ceil</mi><mfenced><msub><mrow><mmultiscripts><mrow><mo>/</mo></mrow><mprescripts /><none /><mn>3</mn></mmultiscripts></mrow><mn>2</mn></msub><mo>*</mo><mfenced open="{" close="}"><mrow><mi>rep_index mod</mi><mspace width="1em" /></mrow><mn>4</mn></mfenced></mfenced><mspace width="1em" /><mi>mod</mi><mspace width="1em" /><mn>4</mn><mo>,</mo></mrow></math><img file="EP3852284A1_D0011.tif" /></maths> ceil(<i>x</i>) is a round-up function, rep_index is a number of a quantity of times of the enhanced transmission of the first information, and mod is a modulo operation; or the RV is determined in an order of 0, 2, 3, and 1 according to an index of a quantity of times of the enhanced transmission.

0461Further, the subframe for the enhanced transmission of the first information includes any one of or a combination of the following: <ul id="ul0058" list-style="none" compact="compact"><li>the subframe for the enhanced transmission of the first information is a subframe in an enhanced transmission opportunity of the first information or a subframe in an enhanced transmission bundle of the first information;</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one radio frame; and</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one system information window.</li></ul>

0462This embodiment of the present invention provides a network device, including a processor and a transmitter, where the processor is configured to determine a subframe for enhanced transmission of first information, where the first information is a master information block, or the first information is a system information block SIB including a time division duplex TDD configuration, or the first information is an SIB including a multicast-broadcast single-frequency network MBSFN subframe configuration; and the transmitter is configured to: after the processor determines the subframe for the enhanced transmission of the first information, perform the enhanced transmission of the first information in the determined subframe for the enhanced transmission of the first information. According to the solution, the subframe used in the enhanced transmission of the first information can be determined, improving transmission reliability of the first information.

Embodiment 23

0463This embodiment of the present invention provides an information transmission device. As shown in <figref idref="f0014">FIG. 27</figref>, the information transmission device includes a processor 80 and a receiver 81, where the processor 80 is configured to determine a subframe for enhanced transmission of first information, where the first information is a master information block, or the first information is an SIB including a TDD configuration, or the first information is an SIB including an MBSFN subframe configuration; and the receiver 81 is configured to: after the processor 80 determines the subframe for the enhanced transmission of the first information, receive the first information in the determined subframe for the enhanced transmission of the first information.

0464Further, the receiver 81 is specifically configured to: if the first information is a master information block, receive the master information block in at least one radio frame a quantity of times that is greater than one time; if the first information is an SIB including a TDD configuration, receive the SIB in at least two consecutive radio frames a quantity of times that is greater than one time; or if the first information is an SIB including an MBSFN subframe configuration, receive the SIB in the determined subframe for the enhanced transmission of the first information a quantity of times that is at least two times.

0465Further, for an FDD system or a Half FDD system, the subframe for the enhanced transmission of the first information includes one or more of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a TDD system, the subframe for the enhanced transmission of the first information includes the subframe 0 and/or the subframe 5.

0466Further, for the TDD system, if the first information is an SIB including an MBSFN subframe configuration and a subframe 6 is not a special subframe, the subframe for the enhanced transmission of the first information further includes the subframe 6.

0467Further, the subframe 0 is a subframe 0 in each radio frame in at least one radio frame, or a subframe 0 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 0 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 4 is a subframe 4 in each radio frame in at least one radio frame, or a subframe 4 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 4 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 5 is a subframe 5 in each radio frame in at least one radio frame, or a subframe 5 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 5 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 6 is a subframe 6 in each radio frame in at least one radio frame, or a subframe 6 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 6 in each odd-numbered radio frame in at least one odd-numbered radio frame; and the subframe 9 is a subframe 9 in each radio frame in at least one radio frame, or a subframe 9 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 9 in each odd-numbered radio frame in at least one odd-numbered radio frame.

0468Further, when the enhanced transmission of the first information is scheduled based on a control channel, a paging message and/or a random access response message on which additional enhanced transmission is performed is not received in the determined subframe for the enhanced transmission of the first information; and when the enhanced transmission of the first information is not scheduled based on a control channel, on a small-bandwidth carrier, the paging message and/or the random access response message on which the additional enhanced transmission is performed is not received in the determined subframe for the enhanced transmission of the first information, where the small-bandwidth carrier includes at least a carrier of 1.4 MHz and/or a carrier of 3 MHz.

0469Further, if the first information is an SIB including a TDD configuration, the receiving of the first information is after receiving of a master information block, and a preset first time offset exists between the receiving of the first information and the receiving of the master information block; and if the first information is an SIB including an MBSFN subframe configuration, the receiving of the first information is after receiving of an SIB including a TDD configuration, and a preset second time offset exists between the receiving of the first information and the receiving of the SIB including the TDD configuration.

0470Further, the processor 80 is further configured to determine a redundancy version RV, in a (rep_index+1)^th time of enhanced transmission, of the first information, where <maths id="math0012"><math display="block"><mrow><mi>RV index</mi><mo>=</mo><mi>ceil</mi><mfenced><msub><mrow><mmultiscripts><mrow><mo>/</mo></mrow><mprescripts /><none /><mn>3</mn></mmultiscripts></mrow><mn>2</mn></msub><mo>*</mo><mfenced open="{" close="}"><mrow><mi>rep_index mod</mi><mspace width="1em" /></mrow><mn>4</mn></mfenced></mfenced><mspace width="1em" /><mi>mod</mi><mspace width="1em" /><mn>4</mn><mo>,</mo></mrow></math><img file="EP3852284A1_D0012.tif" /></maths> ceil(<i>x</i>) is a round-up function, rep_index is a number of a quantity of times of the enhanced transmission of the first information, and mod is a modulo operation; or the RV is determined in an order of 0, 2, 3, and 1 according to an index of a quantity of times of the enhanced transmission.

0471Further, the subframe for the enhanced transmission of the first information includes any one of or a combination of the following: <ul id="ul0059" list-style="none" compact="compact"><li>the subframe for the enhanced transmission of the first information is a subframe in an enhanced transmission opportunity of the first information or a subframe in an enhanced transmission bundle of the first information;</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one radio frame; and</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one system information window.</li></ul>

0472This embodiment of the present invention provides an information transmission device, including a processor and a receiver, where the processor is configured to determine a subframe for enhanced transmission of first information, where the first information is a master information block, or the first information is an SIB including a TDD configuration, or the first information is an SIB including an MBSFN subframe configuration; and the receiver is configured to: after the processor determines the subframe for the enhanced transmission of the first information, receive the first information in the determined subframe for the enhanced transmission of the first information. According to the solution, the subframe used in the enhanced transmission of the first information can be determined, improving transmission reliability of the first information.

Embodiment 24

0473This embodiment of the present invention provides an information transmission system, including the network device having any feature described above and the information transmission device having any feature described above.

0474The information transmission system provided in this embodiment of the present invention includes the network device having any feature described above and the information transmission device having any feature described above. According to the solution, the subframe used in the enhanced transmission of the first information can be determined, improving transmission reliability of the first information.

0475It may be clearly understood by a person skilled in the art that, for the purpose of convenient and brief description, division of the foregoing function modules is taken as an example for illustration. In actual application, the foregoing functions can be allocated to different function modules and implemented according to a requirement, that is, an inner structure of an apparatus is divided into different function modules to implement all or some of the functions described above. For a detailed working process of the foregoing system, apparatus, and unit, reference may be made to a corresponding process in the foregoing method embodiments, and details are not described herein again.

0476In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the described apparatus embodiment is merely exemplary. For example, the module or unit division is merely logical function division and may be other division in actual implementation. For example, a plurality of units or components may be combined or integrated into another system, or some features may be ignored or not performed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections may be implemented through some interfaces. The indirect couplings or communication connections between the apparatuses or units may be implemented in electronic, mechanical, or other forms.

0477The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

0478In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each of the units may exist alone physically, or two or more units are integrated into one unit. The integrated unit may be implemented in a form of hardware, or may be implemented in a form of a software functional unit.

0479When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, the integrated unit may be stored in a computer-readable storage medium. Based on such an understanding, the technical solutions of the present invention essentially, or the part contributing to the prior art, or all or a part of the technical solutions may be implemented in the form of a software product. The software product is stored in a storage medium and includes several instructions for instructing a computer device (which may be a personal computer, a server, or a network device) or a processor to perform all or a part of the steps of the methods described in the embodiments of the present invention. The foregoing storage medium includes: any medium that can store program code, such as a USB flash drive, a removable hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk, or an optical disc.

0480A person of ordinary skill in the art may understand that all or some of the steps of the method embodiments may be implemented by a program instructing relevant hardware. The program may be stored in a computer readable storage medium. When the program runs, the steps of the method embodiments are performed. The foregoing storage medium includes: any medium that can store program code, such as a ROM, a RAM, a magnetic disk, or an optical disc.

0481Further embodiments of the present invention are provided in the following. It should be noted that the numbering used in the following section does not necessarily need to comply with the numbering used in the previous sections. <ul id="ul0060" list-style="none" compact="compact"><li>Embodiment 1. An information transmission method, comprising: <ul id="ul0061" list-style="none" compact="compact"><li>determining a subframe for enhanced transmission of first information; and</li><li>repeatedly transmitting the first information multiple times in the determined subframe for the enhanced transmission of the first information, and skipping channel state information-reference signal CSI-RS transmission on a resource element occupied by the enhanced transmission of the first information, wherein</li><li>the first information is a master information block MIB, and a quantity of times of repeatedly transmitting the MIB in at least one radio frame is greater than one time; or the first information is a system information block type 1 SIB 1, and a quantity of times of repeatedly transmitting the SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of repeatedly transmitting the first information in the determined subframe for the enhanced transmission of the first information is at least two times.</li></ul></li><li>Embodiment 2. The information transmission method according to embodiment 1, wherein for a frequency division duplex FDD system, the subframe for the enhanced transmission of the first information comprises one or more subframes in a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a time division duplex TDD system, the subframe for the enhanced transmission of the first information comprises one or more subframes in the subframe 0, a subframe 1, the subframe 5, and a subframe 6.</li><li>Embodiment 3. The information transmission method according to embodiment 1 or 2, wherein for the FDD system, the subframe for the enhanced transmission of the first information comprises the subframe 9; or the subframe for the enhanced transmission of the first information comprises the subframe 4 and the subframe 9; and for the TDD system, the subframe for the enhanced transmission of the first information comprises the subframe 0; or the subframe for the enhanced transmission of the first information comprises the subframe 0 and the subframe 5.</li><li>Embodiment 4. The information transmission method according to embodiment 3, wherein the subframe for the enhanced transmission of the first information further comprises: <ul id="ul0062" list-style="none" compact="compact"><li>for the FDD system, the subframe for the enhanced transmission of the first information further comprises the subframe 0 and/or the subframe 5; and</li><li>for the TDD system, the subframe for the enhanced transmission of the first information further comprises the subframe 1 and/or the subframe 6.</li></ul></li><li>Embodiment 5. The information transmission method according to any one of embodiments 1 to 4, wherein for the FDD system, the subframe for the enhanced transmission of the first information comprises the subframe 0, the subframe 4, the subframe 5, and the subframe 9; and for the TDD system, the subframe for the enhanced transmission of the first information comprises the subframe 0, the subframe 1, the subframe 5, and the subframe 6.</li><li>Embodiment 6. The information transmission method according to embodiment 1, wherein the skipping channel state information-reference signal CSI-RS transmission on a resource element occupied by the enhanced transmission of the first information specifically comprises: <ul id="ul0063" list-style="none" compact="compact"><li>determining a resource element occupied by the CSI-RS transmission and a subframe for the CSI-RS transmission; and</li><li>if the subframe for the CSI-RS transmission collides with the subframe for the enhanced transmission of the first information, skipping transmitting the first information on a resource element occupied by the CSI-RS transmission in a determined subframe in which the enhanced transmission of the first information collides with the CSI-RS transmission.</li></ul></li><li>Embodiment 7. The information transmission method according to embodiment 1, wherein the skipping channel state information-reference signal CSI-RS transmission on a resource element occupied by the enhanced transmission of the first information specifically comprises: <ul id="ul0064" list-style="none" compact="compact"><li>determining a resource element occupied by the CSI-RS transmission; and</li><li>skipping transmitting the first information on the resource element occupied by the CSI-RS transmission in the determined subframe for the enhanced transmission of the first information.</li></ul></li><li>Embodiment 8. The information transmission method according to embodiment 1, wherein the skipping channel state information-reference signal CSI-RS transmission on a resource element occupied by the enhanced transmission of the first information specifically comprises: <ul id="ul0065" list-style="none" compact="compact"><li>determining a subframe for the CSI-RS transmission; and</li><li>skipping transmitting the first information in the subframe for the CSI-RS transmission.</li></ul></li><li>Embodiment 9. The information transmission method according to embodiment 6 or 7, wherein the determining a resource element occupied by the CSI-RS transmission specifically comprises: <ul id="ul0066" list-style="none" compact="compact"><li>determining an available CSI-RS configuration according to a preset rule, or setting an available CSI-RS configuration and notifying user equipment of the available CSI-RS configuration by using signaling, wherein the available CSI-RS configuration comprises one or more CSI-RS configurations; and</li><li>determining, according to the available CSI-RS configuration, the resource element occupied by the CSI-RS transmission.</li></ul></li><li>Embodiment 10. The information transmission method according to embodiment 6 or 8, wherein the determining a subframe for the CSI-RS transmission specifically comprises: <ul id="ul0067" list-style="none" compact="compact"><li>determining an available CSI-RS subframe configuration according to a preset rule, or setting an available CSI-RS subframe configuration and notifying user equipment of the available CSI-RS subframe configuration by using signaling, wherein the available CSI-RS subframe configuration comprises one or more CSI-RS subframe configurations; and</li><li>determining the subframe for the CSI-RS transmission according to the available CSI-RS subframe configuration.</li></ul></li><li>Embodiment 11. The information transmission method according to embodiment 9 or 10, wherein the signaling comprises: an MIB, a system information block SIB, Radio Resource Control RRC common signaling, RRC dedicated signaling, Media Access Control MAC signaling, or physical layer signaling.</li><li>Embodiment 12. An information transmission method, comprising: <ul id="ul0068" list-style="none" compact="compact"><li>determining a subframe for enhanced transmission of first information; and</li><li>receiving, in the determined subframe for the enhanced transmission of the first information, the first information that is repeatedly transmitted multiple times, and skipping CSI-RS transmission on a resource element occupied by the received first information that is repeatedly transmitted multiple times, wherein</li><li>the first information is an MIB, and a quantity of times of receiving of the repeatedly transmitted MIB in at least one radio frame is greater than one time; or the first information is an SIB 1, and a quantity of times of receiving of the repeatedly transmitted SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of receiving of the repeatedly transmitted first information in the determined subframe for the enhanced transmission of the first information is at least two times.</li></ul></li><li>Embodiment 13. The information transmission method according to embodiment 12, wherein for an FDD system, the subframe for the enhanced transmission of the first information comprises one or more subframes of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a TDD system, the subframe for the enhanced transmission of the first information comprises one or more subframes of the subframe 0, a subframe 1, the subframe 5, and a subframe 6.</li><li>Embodiment 14. The information transmission method according to embodiment 12 or 13, wherein for the FDD system, the subframe for the enhanced transmission of the first information comprises the subframe 9; or the subframe for the enhanced transmission of the first information comprises the subframe 4 and the subframe 9; and for the TDD system, the subframe for the enhanced transmission of the first information comprises the subframe 0; or the subframe for the enhanced transmission of the first information comprises the subframe 0 and the subframe 5.</li><li>Embodiment 15. The information transmission method according to embodiment 14, wherein the subframe for the enhanced transmission of the first information further comprises: <ul id="ul0069" list-style="none" compact="compact"><li>for the FDD system, the subframe for the enhanced transmission of the first information further comprises the subframe 0 and/or the subframe 5; and</li><li>for the TDD system, the subframe for the enhanced transmission of the first information further comprises the subframe 1 and/or the subframe 6.</li></ul></li><li>Embodiment 16. The information transmission method according to any one of embodiments 12 to 15, wherein for the FDD system, the subframe for the enhanced transmission of the first information comprises the subframe 0, the subframe 4, the subframe 5, and the subframe 9; and for the TDD system, the subframe for the enhanced transmission of the first information comprises the subframe 0, the subframe 1, the subframe 5, and the subframe 6.</li><li>Embodiment 17. The information transmission method according to embodiment 12, wherein the skipping CSI-RS transmission on a resource element occupied by the received first information that is repeatedly transmitted multiple times specifically comprises: <ul id="ul0070" list-style="none" compact="compact"><li>determining a resource element occupied by the CSI-RS transmission and a subframe for the CSI-RS transmission; and</li><li>if the subframe for the CSI-RS transmission collides with the subframe for the enhanced transmission of the first information, skipping receiving the first information on a resource element occupied by the CSI-RS transmission in a determined subframe in which the enhanced transmission of the first information collides with the CSI-RS transmission.</li></ul></li><li>Embodiment 18. The information transmission method according to embodiment 12, wherein the skipping CSI-RS transmission on a resource element occupied by the received first information that is repeatedly transmitted multiple times specifically comprises: <ul id="ul0071" list-style="none" compact="compact"><li>determining a resource element occupied by the CSI-RS transmission; and</li><li>skipping receiving the first information on the resource element occupied by the CSI-RS transmission in the determined subframe for the enhanced transmission of the first information.</li></ul></li><li>Embodiment 19. The information transmission method according to embodiment 12, wherein the skipping CSI-RS transmission on a resource element occupied by the received first information that is repeatedly transmitted multiple times specifically comprises: <ul id="ul0072" list-style="none" compact="compact"><li>determining a subframe for the CSI-RS transmission; and</li><li>skipping receiving the first information in the subframe for the CSI-RS transmission.</li></ul></li><li>Embodiment 20. The information transmission method according to embodiment 17 or 18, wherein the determining a resource element occupied by the CSI-RS transmission specifically comprises: <ul id="ul0073" list-style="none" compact="compact"><li>determining an available CSI-RS configuration according to a preset rule, or receiving signaling from a base station, wherein the signaling is used for notifying the available CSI-RS configuration, wherein the available CSI-RS configuration comprises one or more CSI-RS configurations; and</li><li>determining, according to the available CSI-RS configuration, the resource element occupied by the CSI-RS transmission.</li></ul></li><li>Embodiment 21. The information transmission method according to embodiment 17 or 19, wherein the determining a subframe for the CSI-RS transmission specifically comprises: <ul id="ul0074" list-style="none" compact="compact"><li>determining an available CSI-RS subframe configuration according to a preset rule, or receiving signaling from a base station, wherein the signaling is used for notifying the available CSI-RS subframe configuration, wherein the available CSI-RS subframe configuration comprises one or more CSI-RS subframe configurations; and</li><li>determining the subframe for the CSI-RS transmission according to the available CSI-RS subframe configuration.</li></ul></li><li>Embodiment 22. The information transmission method according to embodiment 20 or 21, wherein the signaling comprises: an MIB, a system information block SIB, Radio Resource Control RRC common signaling, RRC dedicated signaling, Media Access Control MAC signaling, or physical layer signaling.</li><li>Embodiment 23. An information transmission apparatus, comprising: <ul id="ul0075" list-style="none" compact="compact"><li>a determining module, configured to determine a subframe for enhanced transmission of first information; and</li><li>a transmission module, configured to repeatedly transmit the first information multiple times in the determined subframe for the enhanced transmission of the first information, and skip CSI-RS transmission of a resource element occupied by the enhanced transmission of the first information, wherein</li><li>the first information is an MIB, and a quantity of times of repeatedly transmitting the MIB in at least one radio frame is greater than one time; or the first information is an SIB 1, and a quantity of times of repeatedly transmitting the SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of repeatedly transmitting the first information in the determined subframe for the enhanced transmission of the first information is at least two times.</li></ul></li><li>Embodiment 24. The information transmission apparatus according to embodiment 23, wherein for an FDD system, the subframe for the enhanced transmission of the first information comprises one or more subframes of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a TDD system, the subframe for the enhanced transmission of the first information comprises one or more subframes of the subframe 0, a subframe 1, the subframe 5, and a subframe 6.</li><li>Embodiment 25. The information transmission apparatus according to embodiment 23 or 24, wherein for the FDD system, the subframe for the enhanced transmission of the first information comprises the subframe 9; or the subframe for the enhanced transmission of the first information comprises the subframe 4 and the subframe 9; and for the TDD system, the subframe for the enhanced transmission of the first information comprises the subframe 0; or the subframe for the enhanced transmission of the first information comprises the subframe 0 and the subframe 5.</li><li>Embodiment 26. The information transmission apparatus according to embodiment 25, wherein the subframe for the enhanced transmission of the first information further comprises: <ul id="ul0076" list-style="none" compact="compact"><li>for the FDD system, the subframe for the enhanced transmission of the first information further comprises the subframe 0 and/or the subframe 5; and</li><li>for the TDD system, the subframe for the enhanced transmission of the first information further comprises the subframe 1 and/or the subframe 6.</li></ul></li><li>Embodiment 27. The information transmission apparatus according to any one of embodiments 23 to 26, wherein for the FDD system, the subframe for the enhanced transmission of the first information comprises the subframe 0, the subframe 4, the subframe 5, and the subframe 9; and for the TDD system, the subframe for the enhanced transmission of the first information comprises the subframe 0, the subframe 1, the subframe 5, and the subframe 6.</li><li>Embodiment 28. The information transmission apparatus according to embodiment 23, wherein the determining module is further configured to determine a resource element occupied by the CSI-RS transmission and a subframe for the CSI-RS transmission; and the transmission module is further configured to: if the subframe for the CSI-RS transmission collides with the subframe for the enhanced transmission of the first information, skip transmitting the first information on the resource element occupied by the CSI-RS transmission in the determined subframe in which the enhanced transmission of the first information collides with the CSI-RS transmission.</li><li>Embodiment 29. The information transmission apparatus according to embodiment 23, wherein the determining module is further configured to determine a resource element occupied by the CSI-RS transmission; and the transmission module is further configured to skip transmitting the first information on the resource element occupied by the CSI-RS transmission in the determined subframe for the enhanced transmission of the first information.</li><li>Embodiment 30. The information transmission apparatus according to embodiment 23, wherein the determining module is further configured to determine a subframe for the CSI-RS transmission; and the transmission module is further configured to skip transmitting the first information in the subframe for the CSI-RS transmission.</li><li>Embodiment 31. The information transmission apparatus according to embodiment 28 or 29, wherein the determining module is specifically configured to determine an available CSI-RS configuration according to a preset rule, or set an available CSI-RS configuration, wherein the available CSI-RS configuration comprises one or more CSI-RS configurations; the determining module is specifically configured to determine, according to the available CSI-RS configuration, the resource element occupied by the CSI-RS transmission; and the information transmission apparatus further comprises: <ul id="ul0077" list-style="none" compact="compact"><li>a notification module, configured to notify user equipment of the available CSI-RS configuration by using signaling.</li></ul></li><li>Embodiment 32. The information transmission apparatus according to embodiment 28 or 30, wherein the determining module is specifically configured to determine an available CSI-RS subframe configuration according to a preset rule, or set an available CSI-RS subframe configuration, wherein the available CSI-RS subframe configuration comprises one or more CSI-RS subframe configurations; the determining module is specifically configured to determine the subframe for the CSI-RS transmission according to the available CSI-RS subframe configuration; and the notification module is further configured to notify user equipment of the available CSI-RS subframe configuration by using signaling.</li><li>Embodiment 33. The information transmission apparatus according to embodiment 31 or 32, wherein the signaling comprises: <ul id="ul0078" list-style="none" compact="compact"><li>an MIB, a system information block SIB, Radio Resource Control RRC common signaling, RRC dedicated signaling, Media Access Control MAC signaling, or physical layer signaling.</li></ul></li><li>Embodiment 34. An information transmission apparatus, comprising: <ul id="ul0079" list-style="none" compact="compact"><li>a determining unit, configured to determine a subframe for enhanced transmission of first information; and</li><li>a receiving unit, configured to receive, in the determined subframe for the enhanced transmission of the first information, the first information that is repeatedly transmitted multiple times, and skip CSI-RS transmission of a resource element occupied by the received first information that is repeatedly transmitted multiple times, wherein</li><li>the first information is an MIB, and a quantity of times of receiving the repeatedly transmitted MIB in at least one radio frame is greater than one time; or the first information is an SIB 1, and a quantity of times of receiving the repeatedly transmitted SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of receiving the repeatedly transmitted first information in the determined subframe for the enhanced transmission of the first information is at least two times.</li></ul></li><li>Embodiment 35. The information transmission apparatus according to embodiment 34, wherein for an FDD system, the subframe for the enhanced transmission of the first information comprises one or more subframes of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a TDD system, the subframe for the enhanced transmission of the first information comprises one or more subframes of the subframe 0, a subframe 1, the subframe 5, and a subframe 6.</li><li>Embodiment 36. The information transmission apparatus according to embodiment 34 or 35, wherein for the FDD system, the subframe for the enhanced transmission of the first information comprises the subframe 9; or the subframe for the enhanced transmission of the first information comprises the subframe 4 and the subframe 9; and for the TDD system, the subframe for the enhanced transmission of the first information comprises the subframe 0; or the subframe for the enhanced transmission of the first information comprises the subframe 0 and the subframe 5.</li><li>Embodiment 37. The information transmission apparatus according to embodiment 36, wherein the subframe for the enhanced transmission of the first information further comprises: <ul id="ul0080" list-style="none" compact="compact"><li>for the FDD system, the subframe for the enhanced transmission of the first information further comprises the subframe 0 and/or the subframe 5; and</li><li>for the TDD system, the subframe for the enhanced transmission of the first information further comprises the subframe 1 and/or the subframe 6.</li></ul></li><li>Embodiment 38. The information transmission apparatus according to any one of embodiments 34 to 37, wherein for the FDD system, the subframe for the enhanced transmission of the first information comprises the subframe 0, the subframe 4, the subframe 5, and the subframe 9; and for the TDD system, the subframe for the enhanced transmission of the first information comprises the subframe 0, the subframe 1, the subframe 5, and the subframe 6.</li><li>Embodiment 39. The information transmission apparatus according to embodiment 34, wherein the determining unit is further configured to determine a resource element occupied by the CSI-RS transmission and a subframe for the CSI-RS transmission; and the receiving unit is further configured to: if the subframe for the CSI-RS transmission collides with the subframe for the enhanced transmission of the first information, skip receiving the first information on the resource element occupied by the CSI-RS transmission in the determined subframe in which the enhanced transmission of the first information collides with the CSI-RS transmission.</li><li>Embodiment 40. The information transmission apparatus according to embodiment 34, wherein the determining unit is further configured to determine a resource element occupied by the CSI-RS transmission; and the receiving unit is further configured to skip receiving the first information on the resource element occupied by the CSI-RS transmission in the determined subframe for the enhanced transmission of the first information.</li><li>Embodiment 41. The information transmission apparatus according to embodiment 34, wherein the determining unit is further configured to determine a subframe for the CSI-RS transmission; and the receiving unit is further configured to skip receiving the first information in the subframe for the CSI-RS transmission.</li><li>Embodiment 42. The information transmission apparatus according to embodiment 39 or 40, wherein the determining unit is specifically configured to determine an available CSI-RS configuration according to a preset rule, wherein the available CSI-RS configuration comprises one or more CSI-RS configurations; the receiving unit is further configured to receive signaling from a base station, wherein the signaling is used for notifying the available CSI-RS configuration; and the determining unit is further configured to determine, according to the available CSI-RS configuration, the resource element occupied by the CSI-RS transmission.</li><li>Embodiment 43. The information transmission apparatus according to embodiment 39 or 41, wherein the determining unit is specifically configured to determine an available CSI-RS subframe configuration according to a preset rule, wherein the available CSI-RS subframe configuration comprises one or more CSI-RS subframe configurations; the receiving unit is further configured to receive signaling from a base station, wherein the signaling is used for notifying the available CSI-RS subframe configuration; and the determining unit is further configured to determine the subframe for the CSI-RS transmission according to the available CSI-RS subframe configuration.</li><li>Embodiment 44. The information transmission apparatus according to embodiment 42 or 43, wherein the signaling comprises: <ul id="ul0081" list-style="none" compact="compact"><li>an MIB, a system information block SIB, Radio Resource Control RRC common signaling, RRC dedicated signaling, Media Access Control MAC signaling, or physical layer signaling.</li></ul></li><li>Embodiment 45. A network device, comprising: <ul id="ul0082" list-style="none" compact="compact"><li>a processor, configured to determine a subframe for enhanced transmission of first information; and</li><li>a transmitter, configured to repeatedly transmit the first information multiple times in the determined subframe for the enhanced transmission of the first information, and skip CSI-RS transmission of a resource element occupied by the enhanced transmission of the first information, wherein</li><li>the first information is an MIB, and a quantity of times of repeatedly transmitting the MIB in at least one radio frame is greater than one time; or the first information is an SIB 1, and a quantity of times of repeatedly transmitting the SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of repeatedly transmitting the first information in the determined subframe for the enhanced transmission of the first information is at least two times.</li></ul></li><li>Embodiment 46. The network device according to embodiment 45, wherein for an FDD system, the subframe for the enhanced transmission of the first information comprises one or more subframes of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a TDD system, the subframe for the enhanced transmission of the first information comprises one or more subframes of the subframe 0, a subframe 1, the subframe 5, and a subframe 6.</li><li>Embodiment 47. The network device according to embodiment 45 or 46, wherein for the FDD system, the subframe for the enhanced transmission of the first information comprises the subframe 9; or the subframe for the enhanced transmission of the first information comprises the subframe 4 and the subframe 9; and for the TDD system, the subframe for the enhanced transmission of the first information comprises the subframe 0; or the subframe for the enhanced transmission of the first information comprises the subframe 0 and the subframe 5.</li><li>Embodiment 48. The network device according to embodiment 47, wherein the subframe for the enhanced transmission of the first information further comprises: <ul id="ul0083" list-style="none" compact="compact"><li>for the FDD system, the subframe for the enhanced transmission of the first information further comprises the subframe 0 and/or the subframe 5; and</li><li>for the TDD system, the subframe for the enhanced transmission of the first information further comprises the subframe 1 and/or the subframe 6.</li></ul></li><li>Embodiment 49. The network device according to any one of embodiments 45 to 48, wherein for the FDD system, the subframe for the enhanced transmission of the first information comprises the subframe 0, the subframe 4, the subframe 5, and the subframe 9; and for the TDD system, the subframe for the enhanced transmission of the first information comprises the subframe 0, the subframe 1, the subframe 5, and the subframe 6.</li><li>Embodiment 50. The network device according to embodiment 45, wherein the processor is further configured to determine a resource element occupied by the CSI-RS transmission and a subframe for the CSI-RS transmission; and the transmitter is further configured to: if the subframe for the CSI-RS transmission collides with the subframe for the enhanced transmission of the first information, skip transmitting the first information on the resource element occupied by the CSI-RS transmission in the determined subframe in which the enhanced transmission of the first information collides with the CSI-RS transmission.</li><li>Embodiment 51. The network device according to embodiment 45, wherein the processor is further configured to determine a resource element occupied by the CSI-RS transmission; and the transmitter is further configured to skip transmitting the first information on the resource element occupied by the CSI-RS transmission in the determined subframe for the enhanced transmission of the first information.</li><li>Embodiment 52. The network device according to embodiment 45, wherein the processor is further configured to determine a subframe for the CSI-RS transmission; and the transmitter is further configured to skip transmitting the first information in the subframe for the CSI-RS transmission.</li><li>Embodiment 53. The network device according to embodiment 50 or 51, wherein the processor is specifically configured to determine an available CSI-RS configuration according to a preset rule, or set an available CSI-RS configuration, wherein the available CSI-RS configuration comprises one or more CSI-RS configurations; the processor is specifically configured to determine, according to the available CSI-RS configuration, the resource element occupied by the CSI-RS transmission; and the transmitter is further configured to notify user equipment of the available CSI-RS configuration by using signaling.</li><li>Embodiment 54. The network device according to embodiment 50 or 52, wherein the processor is specifically configured to determine an available CSI-RS subframe configuration according to a preset rule, or set an available CSI-RS subframe configuration, wherein the available CSI-RS subframe configuration comprises one or more CSI-RS subframe configurations; the processor is specifically configured to determine the subframe for the CSI-RS transmission according to the available CSI-RS subframe configuration; and the transmitter is further configured to notify user equipment of the available CSI-RS subframe configuration by using signaling.</li><li>Embodiment 55. The network device according to embodiment 53 or 54, wherein the signaling comprises: an MIB, a system information block SIB, Radio Resource Control RRC common signaling, RRC dedicated signaling, Media Access Control MAC signaling, or physical layer signaling.</li><li>Embodiment 56. An information transmission device, comprising: <ul id="ul0084" list-style="none" compact="compact"><li>a processor, configured to determine a subframe for enhanced transmission of first information; and</li><li>a receiver, configured to receive, in the determined subframe for the enhanced transmission of the first information, the first information that is repeatedly transmitted multiple times, and skip CSI-RS transmission of a resource element occupied by the received first information that is repeatedly transmitted multiple times, wherein</li><li>the first information is an MIB, and a quantity of times of receiving the repeatedly transmitted MIB in at least one radio frame is greater than one time; or the first information is an SIB 1, and a quantity of times of receiving the repeatedly transmitted SIB 1 in at least two consecutive radio frames is greater than one time; or the first information is other system information except an MIB and an SIB 1, unicast data, a paging message, a random access response RAR, a random access contention resolution message, or control information, and a quantity of times of receiving the repeatedly transmitted first information in the determined subframe for the enhanced transmission of the first information is at least two times.</li></ul></li><li>Embodiment 57. The information transmission device according to embodiment 56, wherein for an FDD system, the subframe for the enhanced transmission of the first information comprises one or more subframes of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a TDD system, the subframe for the enhanced transmission of the first information comprises one or more subframes of the subframe 0, a subframe 1, the subframe 5, and a subframe 6.</li><li>Embodiment 58. The information transmission device according to embodiment 56 or 57, wherein for the FDD system, the subframe for the enhanced transmission of the first information comprises the subframe 9; or the subframe for the enhanced transmission of the first information comprises the subframe 4 and the subframe 9; and for the TDD system, the subframe for the enhanced transmission of the first information comprises the subframe 0; or the subframe for the enhanced transmission of the first information comprises the subframe 0 and the subframe 5.</li><li>Embodiment 59. The information transmission device according to embodiment 56, wherein the subframe for the enhanced transmission of the first information further comprises: <ul id="ul0085" list-style="none" compact="compact"><li>for the FDD system, the subframe for the enhanced transmission of the first information further comprises the subframe 0 and/or the subframe 5; and</li><li>for the TDD system, the subframe for the enhanced transmission of the first information further comprises the subframe 1 and/or the subframe 6.</li></ul></li><li>Embodiment 60. The information transmission device according to any one of embodiments 56 to 59, wherein for the FDD system, the subframe for the enhanced transmission of the first information comprises the subframe 0, the subframe 4, the subframe 5, and the subframe 9; and for the TDD system, the subframe for the enhanced transmission of the first information comprises the subframe 0, the subframe 1, the subframe 5, and the subframe 6.</li><li>Embodiment 61. The information transmission device according to embodiment 56, wherein the processor is further configured to determine a resource element occupied by the CSI-RS transmission and a subframe for the CSI-RS transmission; and the receiver is further configured to: if the subframe for the CSI-RS transmission collides with the subframe for the enhanced transmission of the first information, skip receiving the first information on the resource element occupied by the CSI-RS transmission in the determined subframe in which the enhanced transmission of the first information collides with the CSI-RS transmission.</li><li>Embodiment 62. The information transmission device according to embodiment 56, wherein the processor is further configured to determine a resource element occupied by the CSI-RS transmission; and the receiver is further configured to skip receiving the first information on the resource element occupied by the CSI-RS transmission in the determined subframe for the enhanced transmission of the first information.</li><li>Embodiment 63. The information transmission device according to embodiment 56, wherein the processor is further configured to determine a subframe for the CSI-RS transmission; and the receiver is further configured to skip receiving the first information in the subframe for the CSI-RS transmission.</li><li>Embodiment 64. The information transmission device according to embodiment 61 or 62, wherein the processor is specifically configured to determine an available CSI-RS configuration according to a preset rule, wherein the available CSI-RS configuration comprises one or more CSI-RS configurations; the receiver is further configured to receive signaling from a base station, wherein the signaling is used for notifying the available CSI-RS configuration; and the processor is further configured to determine, according to the available CSI-RS configuration, the resource element occupied by the CSI-RS transmission.</li><li>Embodiment 65. The information transmission device according to embodiment 61 or 63, wherein the processor is specifically configured to determine an available CSI-RS subframe configuration according to a preset rule, wherein the available CSI-RS subframe configuration comprises one or more CSI-RS subframe configurations; the receiver is further configured to receive signaling from a base station, wherein the signaling is used for notifying the available CSI-RS subframe configuration; and the processor is further configured to determine the subframe for the CSI-RS transmission according to the available CSI-RS subframe configuration.</li><li>Embodiment 66. The information transmission device according to embodiment 64 or 65, wherein the signaling comprises: <ul id="ul0086" list-style="none" compact="compact"><li>an MIB, a system information block SIB, Radio Resource Control RRC common signaling, RRC dedicated signaling, Media Access Control MAC signaling, or physical layer signaling.</li></ul></li><li>Embodiment 67. An information transmission system, comprising the base station according to any one of embodiments 45 to 55 and the user equipment according to any one of embodiments 56 to 66.</li><li>Embodiment 68. An information transmission method, comprising: <ul id="ul0087" list-style="none" compact="compact"><li>determining a subframe for enhanced transmission of first information, wherein the first information is a master information block, or the first information is a system information block SIB comprising a time division duplex TDD configuration, or the first information is an SIB comprising a multicast-broadcast single-frequency network MBSFN subframe configuration; and</li><li>performing the enhanced transmission of the first information in the determined subframe for the enhanced transmission of the first information.</li></ul></li><li>Embodiment 69. The information transmission method according to embodiment 68, wherein the performing the enhanced transmission of the first information in the determined subframe for the enhanced transmission of the first information specifically comprises: <ul id="ul0088" list-style="none" compact="compact"><li>if the first information is a master information block, performing the enhanced transmission of the master information block in at least one radio frame a quantity of times that is greater than one time; or</li><li>if the first information is an SIB comprising a TDD configuration, performing the enhanced transmission of the SIB in at least two consecutive radio frames a quantity of times that is greater than one time; or</li><li>if the first information is an SIB comprising an MBSFN subframe configuration, performing the enhanced transmission of the SIB in the determined subframe for the enhanced transmission of the first information a quantity of times that is at least two times.</li></ul></li><li>Embodiment 70. The information transmission method according to embodiment 68 or 69, wherein for a frequency division duplex FDD system or a half frequency division duplex Half FDD system, the subframe for the enhanced transmission of the first information comprises one or more of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a TDD system, the subframe for the enhanced transmission of the first information comprises the subframe 0 and/or the subframe 5.</li><li>Embodiment 71. The information transmission method according to embodiment 70, wherein for the TDD system, if the first information is an SIB comprising an MBSFN subframe configuration and a subframe 6 is not a special subframe, the subframe for the enhanced transmission of the first information further comprises the subframe 6.</li><li>Embodiment 72. The information transmission method according to embodiment 70 or 71, wherein the subframe 0 is a subframe 0 in each radio frame in at least one radio frame, or a subframe 0 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 0 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 4 is a subframe 4 in each radio frame in at least one radio frame, or a subframe 4 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 4 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 5 is a subframe 5 in each radio frame in at least one radio frame, or a subframe 5 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 5 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 6 is a subframe 6 in each radio frame in at least one radio frame, or a subframe 6 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 6 in each odd-numbered radio frame in at least one odd-numbered radio frame; and the subframe 9 is a subframe 9 in each radio frame in at least one radio frame, or a subframe 9 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 9 in each odd-numbered radio frame in at least one odd-numbered radio frame.</li><li>Embodiment 73. The information transmission method according to any one of embodiments 68 to 72, wherein when the enhanced transmission of the first information is scheduled based on a control channel, additional enhanced transmission of a paging message and/or a random access response message is not performed in the determined subframe for the enhanced transmission of the first information; and when the enhanced transmission of the first information is not scheduled based on a control channel, on a small-bandwidth carrier, the additional enhanced transmission of the paging message and/or the random access response message is not performed in the determined subframe for the enhanced transmission of the first information, wherein the small-bandwidth carrier comprises at least a carrier of 1.4 MHz and/or a carrier of 3 MHz.</li><li>Embodiment 74. The information transmission method according to any one of embodiments 68 to 73, wherein if the first information is an SIB comprising a TDD configuration, the enhanced transmission of the first information is after enhanced transmission of a master information block, and a preset first time offset exists between the enhanced transmission of the first information and the enhanced transmission of the master information block; and if the first information is an SIB comprising an MBSFN subframe configuration, the enhanced transmission of the first information is after enhanced transmission of an SIB comprising a TDD configuration, and a preset second time offset exists between the enhanced transmission of the first information and the enhanced transmission of the SIB comprising the TDD configuration.</li><li>Embodiment 75. The information transmission method according to any one of embodiments 68 to 74, wherein the method further comprises: determining a redundancy version RV, in a th time of enhanced transmission, of the first information, wherein <maths id="math0013"><math display="block"><mrow><mi>RV index</mi><mo>=</mo><mi>ceil</mi><mfenced><msub><mrow><mmultiscripts><mrow><mo>/</mo></mrow><mprescripts /><none /><mn>3</mn></mmultiscripts></mrow><mn>2</mn></msub><mo>*</mo><mfenced open="{" close="}"><mrow><mi>rep_index mod</mi><mspace width="1em" /></mrow><mn>4</mn></mfenced></mfenced><mspace width="1em" /><mi>mod</mi><mspace width="1em" /><mn>4</mn><mo>,</mo></mrow></math><img file="EP3852284A1_D0013.tif" /></maths> ceil(<i>x</i>) is a round-up function, rep_index is a number of a quantity of times of the enhanced transmission of the first information, and mod is a modulo operation; or the RV is determined in an order of 0, 2, 3, and 1 according to an index of a quantity of times of the enhanced transmission.</li><li>Embodiment 76. The information transmission method according to any one of embodiments 68 to 75, wherein the subframe for the enhanced transmission of the first information comprises any one of or a combination of the following: <ul id="ul0089" list-style="none" compact="compact"><li>the subframe for the enhanced transmission of the first information is a subframe in an enhanced transmission opportunity of the first information or a subframe in an enhanced transmission bundle of the first information;</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one radio frame; and</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one system information window.</li></ul></li><li>Embodiment 77. An information transmission method, comprising: <ul id="ul0090" list-style="none" compact="compact"><li>determining a subframe for enhanced transmission of first information, wherein the first information is a master information block, or the first information is an SIB comprising a TDD configuration, or the first information is an SIB comprising an MBSFN subframe configuration; and</li><li>receiving the first information in the determined subframe for the enhanced transmission of the first information.</li></ul></li><li>Embodiment 78. The information transmission method according to embodiment 77, wherein the receiving the first information in the determined subframe for the enhanced transmission of the first information specifically comprises: <ul id="ul0091" list-style="none" compact="compact"><li>if the first information is a master information block, receiving the master information block in at least one radio frame a quantity of times that is greater than one time; or</li><li>if the first information is an SIB comprising a TDD configuration, receiving the SIB in at least two consecutive radio frames a quantity of times that is greater than one time; or</li><li>if the first information is an SIB comprising an MBSFN subframe configuration, receiving the SIB in the determined subframe for the enhanced transmission of the first information a quantity of times that is at least two times.</li></ul></li><li>Embodiment 79. The information transmission method according to embodiment 77 or 78, wherein for an FDD system or a Half FDD system, the subframe for the enhanced transmission of the first information comprises one or more of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a TDD system, the subframe for the enhanced transmission of the first information comprises the subframe 0 and/or the subframe 5.</li><li>Embodiment 80. The information transmission method according to embodiment 79, wherein for the TDD system, if the first information is an SIB comprising an MBSFN subframe configuration and a subframe 6 is not a special subframe, the subframe for the enhanced transmission of the first information further comprises the subframe 6.</li><li>Embodiment 81. The information transmission method according to embodiment 79 or 80, wherein the subframe 0 is a subframe 0 in each radio frame in at least one radio frame, or a subframe 0 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 0 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 4 is a subframe 4 in each radio frame in at least one radio frame, or a subframe 4 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 4 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 5 is a subframe 5 in each radio frame in at least one radio frame, or a subframe 5 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 5 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 6 is a subframe 6 in each radio frame in at least one radio frame, or a subframe 6 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 6 in each odd-numbered radio frame in at least one odd-numbered radio frame; and the subframe 9 is a subframe 9 in each radio frame in at least one radio frame, or a subframe 9 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 9 in each odd-numbered radio frame in at least one odd-numbered radio frame.</li><li>Embodiment 82. The information transmission method according to any one of embodiments 77 to 81, wherein when the enhanced transmission of the first information is scheduled based on a control channel, a paging message and/or a random access response message on which additional enhanced transmission is performed is not received in the determined subframe for the enhanced transmission of the first information; and when the enhanced transmission of the first information is not scheduled based on a control channel, on a small-bandwidth carrier, the paging message and/or the random access response message on which the additional enhanced transmission is performed is not received in the determined subframe for the enhanced transmission of the first information, wherein the small-bandwidth carrier comprises at least a carrier of 1.4 MHz and/or a carrier of 3 MHz.</li><li>Embodiment 83. The information transmission method according to any one of embodiments 77 to 82, wherein if the first information is an SIB comprising a TDD configuration, the receiving of the first information is after receiving of a master information block, and a preset first time offset exists between the receiving of the first information and the receiving of the master information block; and if the first information is an SIB comprising an MBSFN subframe configuration, the receiving of the first information is after receiving of an SIB comprising a TDD configuration, and a preset second time offset exists between the receiving of the first information and the receiving of the SIB comprising the TDD configuration.</li><li>Embodiment 84. The information transmission method according to any one of embodiments 77 to 83, wherein the method further comprises: determining a redundancy version RV, in a (rep_index+1)^th time of enhanced transmission, of the first information, wherein <maths id="math0014"><math display="block"><mrow><mi>RV index</mi><mo>=</mo><mi>ceil</mi><mfenced><msub><mrow><mmultiscripts><mrow><mo>/</mo></mrow><mprescripts /><none /><mn>3</mn></mmultiscripts></mrow><mn>2</mn></msub><mo>*</mo><mfenced open="{" close="}"><mrow><mi>rep_index mod</mi><mspace width="1em" /></mrow><mn>4</mn></mfenced></mfenced><mspace width="1em" /><mi>mod</mi><mspace width="1em" /><mn>4</mn><mo>,</mo></mrow></math><img file="EP3852284A1_D0014.tif" /></maths> Ceil(<i>x</i>) is a round-up function, rep_index is a number of a quantity of times of the enhanced transmission of the first information, and mod is a modulo operation; or the RV is determined in an order of 0, 2, 3, and 1 according to an index of a quantity of times of the enhanced transmission.</li><li>Embodiment 85. The information transmission method according to any one of embodiments 77 to 84, wherein the subframe for the enhanced transmission of the first information comprises any one of or a combination of the following: <ul id="ul0092" list-style="none" compact="compact"><li>the subframe for the enhanced transmission of the first information is a subframe in an enhanced transmission opportunity of the first information or a subframe in an enhanced transmission bundle of the first information;</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one radio frame; and</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one system information window.</li></ul></li><li>Embodiment 86. An information transmission apparatus, comprising: <ul id="ul0093" list-style="none" compact="compact"><li>a determining module, configured to determine a subframe for enhanced transmission of first information, wherein the first information is a master information block, or the first information is a system information block SIB comprising a time division duplex TDD configuration, or the first information is an SIB comprising a multicast-broadcast single-frequency network MBSFN subframe configuration; and</li><li>a sending module, configured to: after the determining module determines the subframe for the enhanced transmission of the first information, perform the enhanced transmission of the first information in the determined subframe for the enhanced transmission of the first information.</li></ul></li><li>Embodiment 87. The information transmission apparatus according to embodiment 86, wherein the sending module is specifically configured to: if the first information is a master information block, perform the enhanced transmission of the master information block in at least one radio frame a quantity of times that is greater than one time; if the first information is an SIB comprising a TDD configuration, perform the enhanced transmission of the SIB in at least two consecutive radio frames a quantity of times that is greater than one time; or if the first information is an SIB comprising an MBSFN subframe configuration, perform the enhanced transmission of the SIB in the determined subframe for the enhanced transmission of the first information a quantity of times that is at least two times.</li><li>Embodiment 88. The information transmission apparatus according to embodiment 86 or 87, wherein for a frequency division duplex FDD system or a half frequency division duplex Half FDD system, the subframe for the enhanced transmission of the first information comprises one or more of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a TDD system, the subframe for the enhanced transmission of the first information comprises the subframe 0 and/or the subframe 5.</li><li>Embodiment 89. The information transmission apparatus according to embodiment 88, wherein for the TDD system, if the first information is an SIB comprising an MBSFN subframe configuration and a subframe 6 is not a special subframe, the subframe for the enhanced transmission of the first information further comprises the subframe 6.</li><li>Embodiment 90. The information transmission apparatus according to embodiment 88 or 89, wherein the subframe 0 is a subframe 0 in each radio frame in at least one radio frame, or a subframe 0 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 0 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 4 is a subframe 4 in each radio frame in at least one radio frame, or a subframe 4 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 4 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 5 is a subframe 5 in each radio frame in at least one radio frame, or a subframe 5 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 5 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 6 is a subframe 6 in each radio frame in at least one radio frame, or a subframe 6 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 6 in each odd-numbered radio frame in at least one odd-numbered radio frame; and the subframe 9 is a subframe 9 in each radio frame in at least one radio frame, or a subframe 9 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 9 in each odd-numbered radio frame in at least one odd-numbered radio frame.</li><li>Embodiment 91. The information transmission apparatus according to any one of embodiments 86 to 90, wherein when the enhanced transmission of the first information is scheduled based on a control channel, additional enhanced transmission of a paging message and/or a random access response message is not performed in the determined subframe for the enhanced transmission of the first information; and when the enhanced transmission of the first information is not scheduled based on a control channel, on a small-bandwidth carrier, the additional enhanced transmission of the paging message and/or the random access response message is not performed in the determined subframe for the enhanced transmission of the first information, wherein the small-bandwidth carrier comprises at least a carrier of 1.4 MHz and/or a carrier of 3 MHz.</li><li>Embodiment 92. The information transmission apparatus according to any one of embodiments 86 to 91, wherein if the first information is an SIB comprising a TDD configuration, the enhanced transmission of the first information is after enhanced transmission of a master information block, and a preset first time offset exists between the enhanced transmission of the first information and the enhanced transmission of the master information block; and if the first information is an SIB comprising an MBSFN subframe configuration, the enhanced transmission of the first information is after enhanced transmission of an SIB comprising a TDD configuration, and a preset second time offset exists between the enhanced transmission of the first information and the enhanced transmission of the SIB comprising the TDD configuration.</li><li>Embodiment 93. The information transmission apparatus according to any one of embodiments 86 to 92, wherein the determining module is further configured to determine a redundancy version RV, in a (rep_index+1)^th time of enhanced transmission, of the first information, wherein <maths id="math0015"><math display="block"><mrow><mi>RV index</mi><mo>=</mo><mi>ceil</mi><mfenced><msub><mrow><mmultiscripts><mrow><mo>/</mo></mrow><mprescripts /><none /><mn>3</mn></mmultiscripts></mrow><mn>2</mn></msub><mo>*</mo><mfenced open="{" close="}"><mrow><mi>rep_index mod</mi><mspace width="1em" /></mrow><mn>4</mn></mfenced></mfenced><mspace width="1em" /><mi>mod</mi><mspace width="1em" /><mn>4</mn><mo>,</mo></mrow></math><img file="EP3852284A1_D0015.tif" /></maths> Ceil(<i>x</i>) is a round-up function, rep_index is a number of a quantity of times of the enhanced transmission of the first information, and mod is a modulo operation; or the RV is determined in an order of 0, 2, 3, and 1 according to an index of a quantity of times of the enhanced transmission.</li><li>Embodiment 94. The information transmission apparatus according to any one of embodiments 86 to 93, wherein the subframe for the enhanced transmission of the first information comprises any one of or a combination of the following: <ul id="ul0094" list-style="none" compact="compact"><li>the subframe for the enhanced transmission of the first information is a subframe in an enhanced transmission opportunity of the first information or a subframe in an enhanced transmission bundle of the first information;</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one radio frame; and</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one system information window.</li></ul></li><li>Embodiment 95. An information transmission apparatus, comprising: <ul id="ul0095" list-style="none" compact="compact"><li>a determining module, configured to determine a subframe for enhanced transmission of first information, wherein the first information is a master information block, or the first information is an SIB comprising a TDD configuration, or the first information is an SIB comprising an MBSFN subframe configuration; and</li><li>a receiving module, configured to: after the determining module determines the subframe for the enhanced transmission of the first information, receive the first information in the determined subframe for the enhanced transmission of the first information.</li></ul></li><li>Embodiment 96. The information transmission apparatus according to embodiment 95, wherein the receiving module is specifically configured to: if the first information is a master information block, receive the master information block in at least one radio frame a quantity of times that is greater than one time; if the first information is an SIB comprising a TDD configuration, receive the SIB in at least two consecutive radio frames a quantity of times that is greater than one time; or if the first information is an SIB comprising an MBSFN subframe configuration, receive the SIB in the determined subframe for the enhanced transmission of the first information a quantity of times that is at least two times.</li><li>Embodiment 97. The information transmission apparatus according to embodiment 95 or 96, wherein for an FDD system or a Half FDD system, the subframe for the enhanced transmission of the first information comprises one or more of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a TDD system, the subframe for the enhanced transmission of the first information comprises the subframe 0 and/or the subframe 5.</li><li>Embodiment 98. The information transmission apparatus according to embodiment 97, wherein for the TDD system, if the first information is an SIB comprising an MBSFN subframe configuration and a subframe 6 is not a special subframe, the subframe for the enhanced transmission of the first information further comprises the subframe 6.</li><li>Embodiment 99. The information transmission apparatus according to embodiment 97 or 98, wherein the subframe 0 is a subframe 0 in each radio frame in at least one radio frame, or a subframe 0 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 0 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 4 is a subframe 4 in each radio frame in at least one radio frame, or a subframe 4 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 4 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 5 is a subframe 5 in each radio frame in at least one radio frame, or a subframe 5 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 5 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 6 is a subframe 6 in each radio frame in at least one radio frame, or a subframe 6 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 6 in each odd-numbered radio frame in at least one odd-numbered radio frame; and the subframe 9 is a subframe 9 in each radio frame in at least one radio frame, or a subframe 9 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 9 in each odd-numbered radio frame in at least one odd-numbered radio frame.</li><li>Embodiment 100. The information transmission apparatus according to any one of embodiments 95 to 99, wherein when the enhanced transmission of the first information is scheduled based on a control channel, a paging message and/or a random access response message on which additional enhanced transmission is performed is not received in the determined subframe for the enhanced transmission of the first information; and when the enhanced transmission of the first information is not scheduled based on a control channel, on a small-bandwidth carrier, the paging message and/or the random access response message on which the additional enhanced transmission is performed is not received in the determined subframe for the enhanced transmission of the first information, wherein the small-bandwidth carrier comprises at least a carrier of 1.4 MHz and/or a carrier of 3 MHz.</li><li>Embodiment 101. The information transmission apparatus according to any one of embodiments 95 to 100, wherein if the first information is an SIB comprising a TDD configuration, the receiving of the first information is after receiving of a master information block, and a preset first time offset exists between the receiving of the first information and the receiving of the master information block; and if the first information is an SIB comprising an MBSFN subframe configuration, the receiving of the first information is after receiving of an SIB comprising a TDD configuration, and a preset second time offset exists between the receiving of the first information and the receiving of the SIB comprising the TDD configuration.</li><li>Embodiment 102. The information transmission apparatus according to any one of embodiments 95 to 101, wherein the determining module is further configured to determine a redundancy version RV, in a (rep_index+1)^th time of enhanced transmission, of the first information, wherein <maths id="math0016"><math display="block"><mrow><mi>RV index</mi><mo>=</mo><mi>ceil</mi><mfenced><msub><mrow><mmultiscripts><mrow><mo>/</mo></mrow><mprescripts /><none /><mn>3</mn></mmultiscripts></mrow><mn>2</mn></msub><mo>*</mo><mfenced open="{" close="}"><mrow><mi>rep_index mod</mi><mspace width="1em" /></mrow><mn>4</mn></mfenced></mfenced><mspace width="1em" /><mi>mod</mi><mspace width="1em" /><mn>4</mn><mo>,</mo></mrow></math><img file="EP3852284A1_D0016.tif" /></maths> Ceil(<i>x</i>) is a round-up function, rep_index is a number of a quantity of times of the enhanced transmission of the first information, and mod is a modulo operation; or the RV is determined in an order of 0, 2, 3, and 1 according to an index of a quantity of times of the enhanced transmission.</li><li>Embodiment 103. The information transmission apparatus according to any one of embodiments 95 to 102, wherein the subframe for the enhanced transmission of the first information comprises any one of or a combination of the following: <ul id="ul0096" list-style="none" compact="compact"><li>the subframe for the enhanced transmission of the first information is a subframe in an enhanced transmission opportunity of the first information or a subframe in an enhanced transmission bundle of the first information;</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one radio frame; and</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one system information window.</li></ul></li><li>Embodiment 104. A network device, comprising: <ul id="ul0097" list-style="none" compact="compact"><li>a processor, configured to determine a subframe for enhanced transmission of first information, wherein the first information is a master information block, or the first information is a system information block SIB comprising a time division duplex TDD configuration, or the first information is an SIB comprising a multicast-broadcast single-frequency network MBSFN subframe configuration; and</li><li>a transmitter, configured to: after the processor determines the subframe for the enhanced transmission of the first information, perform the enhanced transmission of the first information in the determined subframe for the enhanced transmission of the first information.</li></ul></li><li>Embodiment 105. The network device according to embodiment 104, wherein the transmitter is specifically configured to: if the first information is a master information block, perform the enhanced transmission of the master information block in at least one radio frame a quantity of times that is greater than one time; if the first information is an SIB comprising a TDD configuration, perform the enhanced transmission of the SIB in at least two consecutive radio frames a quantity of times that is greater than one time; or if the first information is an SIB comprising an MBSFN subframe configuration, perform the enhanced transmission of the SIB in the determined subframe for the enhanced transmission of the first information a quantity of times that is at least two times.</li><li>Embodiment 106. The network device according to embodiment 104 or 105, wherein for a frequency division duplex FDD system or a half frequency division duplex Half FDD system, the subframe for the enhanced transmission of the first information comprises one or more of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a TDD system, the subframe for the enhanced transmission of the first information comprises the subframe 0 and/or the subframe 5.</li><li>Embodiment 107. The network device according to embodiment 106, wherein for the TDD system, if the first information is an SIB comprising an MBSFN subframe configuration and a subframe 6 is not a special subframe, the subframe for the enhanced transmission of the first information further comprises the subframe 6.</li><li>Embodiment 108. The network device according to embodiment 106 or 107, wherein the subframe 0 is a subframe 0 in each radio frame in at least one radio frame, or a subframe 0 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 0 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 4 is a subframe 4 in each radio frame in at least one radio frame, or a subframe 4 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 4 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 5 is a subframe 5 in each radio frame in at least one radio frame, or a subframe 5 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 5 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 6 is a subframe 6 in each radio frame in at least one radio frame, or a subframe 6 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 6 in each odd-numbered radio frame in at least one odd-numbered radio frame; and the subframe 9 is a subframe 9 in each radio frame in at least one radio frame, or a subframe 9 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 9 in each odd-numbered radio frame in at least one odd-numbered radio frame.</li><li>Embodiment 109. The network device according to any one of embodiments 104 to 108, wherein when the enhanced transmission of the first information is scheduled based on a control channel, additional enhanced transmission of a paging message and/or a random access response message is not performed in the determined subframe for the enhanced transmission of the first information; and when the enhanced transmission of the first information is not scheduled based on a control channel, on a small-bandwidth carrier, the additional enhanced transmission of the paging message and/or the random access response message is not performed in the determined subframe for the enhanced transmission of the first information, wherein the small-bandwidth carrier comprises at least a carrier of 1.4 MHz and/or a carrier of 3 MHz.</li><li>Embodiment 110. The network device according to any one of embodiments 104 to 109, wherein if the first information is an SIB comprising a TDD configuration, the enhanced transmission of the first information is after enhanced transmission of a master information block, and a preset first time offset exists between the enhanced transmission of the first information and the enhanced transmission of the master information block; and if the first information is an SIB comprising an MBSFN subframe configuration, the enhanced transmission of the first information is after enhanced transmission of an SIB comprising a TDD configuration, and a preset second time offset exists between the enhanced transmission of the first information and the enhanced transmission of the SIB comprising the TDD configuration.</li><li>Embodiment 111. The network device according to any one of embodiments 104 to 110, wherein the processor is further configured to determine a redundancy version RV, in a (rep_index+1)^th time of enhanced transmission, of the first information, wherein <maths id="math0017"><math display="block"><mrow><mi>RV index</mi><mo>=</mo><mi>ceil</mi><mfenced><msub><mrow><mmultiscripts><mrow><mo>/</mo></mrow><mprescripts /><none /><mn>3</mn></mmultiscripts></mrow><mn>2</mn></msub><mo>*</mo><mfenced open="{" close="}"><mrow><mi>rep_index mod</mi><mspace width="1em" /></mrow><mn>4</mn></mfenced></mfenced><mspace width="1em" /><mi>mod</mi><mspace width="1em" /><mn>4</mn><mo>,</mo></mrow></math><img file="EP3852284A1_D0017.tif" /></maths> Ceil(<i>x</i>) is a round-up function, rep_index is a number of a quantity of times of the enhanced transmission of the first information, and mod is a modulo operation; or the RV is determined in an order of 0, 2, 3, and 1 according to an index of a quantity of times of the enhanced transmission.</li><li>Embodiment 112. The network device according to any one of embodiments 104 to 111, wherein the subframe for the enhanced transmission of the first information comprises any one of or a combination of the following: the subframe for the enhanced transmission of the first information is a subframe in an enhanced transmission opportunity of the first information or a subframe in an enhanced transmission bundle of the first information; the subframe for the enhanced transmission of the first information is a subframe in at least one radio frame; and the subframe for the enhanced transmission of the first information is a subframe in at least one system information window.</li><li>Embodiment 113. An information transmission device, comprising: <ul id="ul0098" list-style="none" compact="compact"><li>a processor, configured to determine a subframe for enhanced transmission of first information, wherein the first information is a master information block, or the first information is an SIB comprising a TDD configuration, or the first information is an SIB comprising an MBSFN subframe configuration; and</li><li>a receiver, configured to: after the processor determines the subframe for the enhanced transmission of the first information, receive the first information in the determined subframe for the enhanced transmission of the first information.</li></ul></li><li>Embodiment 114. The information transmission device according to embodiment 113, wherein the receiver is specifically configured to: if the first information is a master information block, receive the master information block in at least one radio frame a quantity of times that is greater than one time; if the first information is an SIB comprising a TDD configuration, receive the SIB in at least two consecutive radio frames a quantity of times that is greater than one time; or if the first information is an SIB comprising an MBSFN subframe configuration, receive the SIB in the determined subframe for the enhanced transmission of the first information a quantity of times that is at least two times.</li><li>Embodiment 115. The information transmission device according to embodiment 113 or 114, wherein for an FDD system or a Half FDD system, the subframe for the enhanced transmission of the first information comprises one or more of a subframe 0, a subframe 4, a subframe 5, and a subframe 9; and for a TDD system, the subframe for the enhanced transmission of the first information comprises the subframe 0 and/or the subframe 5.</li><li>Embodiment 116. The information transmission device according to embodiment 115, wherein for the TDD system, if the first information is an SIB comprising an MBSFN subframe configuration and a subframe 6 is not a special subframe, the subframe for the enhanced transmission of the first information further comprises the subframe 6.</li><li>Embodiment 117. The information transmission device according to embodiment 115 or 116, wherein the subframe 0 is a subframe 0 in each radio frame in at least one radio frame, or a subframe 0 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 0 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 4 is a subframe 4 in each radio frame in at least one radio frame, or a subframe 4 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 4 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 5 is a subframe 5 in each radio frame in at least one radio frame, or a subframe 5 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 5 in each odd-numbered radio frame in at least one odd-numbered radio frame; the subframe 6 is a subframe 6 in each radio frame in at least one radio frame, or a subframe 6 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 6 in each odd-numbered radio frame in at least one odd-numbered radio frame; and the subframe 9 is a subframe 9 in each radio frame in at least one radio frame, or a subframe 9 in each even-numbered radio frame in at least one even-numbered radio frame, or a subframe 9 in each odd-numbered radio frame in at least one odd-numbered radio frame.</li><li>Embodiment 118. The information transmission device according to any one of embodiments 113 to 117, wherein when the enhanced transmission of the first information is scheduled based on a control channel, a paging message and/or a random access response message on which additional enhanced transmission is performed is not received in the determined subframe for the enhanced transmission of the first information; and when the enhanced transmission of the first information is not scheduled based on a control channel, on a small-bandwidth carrier, the paging message and/or the random access response message on which the additional enhanced transmission is performed is not received in the determined subframe for the enhanced transmission of the first information, wherein the small-bandwidth carrier comprises at least a carrier of 1.4 MHz and/or a carrier of 3 MHz.</li><li>Embodiment 119. The information transmission device according to any one of embodiments 113 to 118, wherein if the first information is an SIB comprising a TDD configuration, the receiving of the first information is after receiving of a master information block, and a preset first time offset exists between the receiving of the first information and the receiving of the master information block; and if the first information is an SIB comprising an MBSFN subframe configuration, the receiving of the first information is after receiving of an SIB comprising a TDD configuration, and a preset second time offset exists between the receiving of the first information and the receiving of the SIB comprising the TDD configuration.</li><li>Embodiment 120. The information transmission device according to any one of embodiments 113 to 119, wherein the processor is further configured to determine a redundancy version RV, in a (rep_index+1)^th time of enhanced transmission, of the first information, wherein <maths id="math0018"><math display="block"><mrow><mi>RV index</mi><mo>=</mo><mi>ceil</mi><mfenced><msub><mrow><mmultiscripts><mrow><mo>/</mo></mrow><mprescripts /><none /><mn>3</mn></mmultiscripts></mrow><mn>2</mn></msub><mo>*</mo><mfenced open="{" close="}"><mrow><mi>rep_index mod</mi><mspace width="1em" /></mrow><mn>4</mn></mfenced></mfenced><mspace width="1em" /><mi>mod</mi><mspace width="1em" /><mn>4</mn><mo>,</mo></mrow></math><img file="EP3852284A1_D0018.tif" /></maths> Ceil(<i>x</i>) is a round-up function, rep_index is a number of a quantity of times of the enhanced transmission of the first information, and mod is a modulo operation; or the RV is determined in an order of 0, 2, 3, and 1 according to an index of a quantity of times of the enhanced transmission.</li><li>Embodiment 121. The information transmission device according to any one of embodiments 113 to 120, wherein the subframe for the enhanced transmission of the first information comprises any one of or a combination of the following: <ul id="ul0099" list-style="none" compact="compact"><li>the subframe for the enhanced transmission of the first information is a subframe in an enhanced transmission opportunity of the first information or a subframe in an enhanced transmission bundle of the first information;</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one radio frame; and</li><li>the subframe for the enhanced transmission of the first information is a subframe in at least one system information window.</li></ul></li><li>Embodiment 122. An information transmission system, comprising the network device according to any one of embodiments 104 to 112 and the information transmission device according to any one of embodiments 113 to 121.</li></ul>

0482The foregoing descriptions are merely specific implementation manners of the present invention, but are not intended to limit the protection scope of the present invention. Any variation or replacement readily figured out by a person skilled in the art within the technical scope disclosed in the present invention shall fall within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.