Transmission method, base station, and terminal for dynamically adjusting beam collection

Transmission method, base station, and terminal for dynamically adjusting beam aggregation

This application claims priority to Chinese Patent Application No. 201611180093.6 ("TRANSMISSION METHOD USING DYNAMICALLY ADJUSTED BEAM SET, BASE STATION, AND TERMINAL"), the entire contents of which are incorporated herein by reference. .

The present invention relates to the field of communication, and more particularly, to a transmission method using a dynamically adjusted beam set, a base station, and a terminal.

Fifth generation (5G) mobile communication systems increase mobile data traffic, provide large-scale Internet of Things, and enable a variety of services and application scenarios in the future. In addition to serving as a unified frame of connection, the fundamental 5G New Radio (NR) of new-generation cellular networks additionally raises data rates, capacity, latency, reliability, efficiency, and coverage capabilities of the network to a whole new level, allowing each bit hopes to make full use of the available spectrum resources of Orthogonal Frequency Division Multiplexing (OFDM, OFDM) Designed based on NR, 5G has become a global standard, supports a variety of deployments of 5G devices, and covers a wide range of spectrums (including coverage of low and high frequency bands). and will additionally support various services and terminals.

Although high-frequency transmission provides more bandwidth, high-frequency transmission has unique problems such as high signal fading and poor penetration. Currently, it is considered that a transmission solution featuring massive Multiple-Input Multiple-Output (MIMO) beamforming improves the coverage of high-frequency transmission and also overcomes the problem of severe fading. Solutions such as space frequency block code (SFBC), (semi)-open-loop, and beam-cycling solve the problem of reducing penetration due to blocking. used to In the above solution, the beams may be beams of different directions or beams formed by beams of different directions.

Blocking is often unexpected, and existing solutions use means of semi-static adjustment of the beam. Semi-static coordination means that the beam set is indicated using higher layer signaling (eg, Radio Resource Control (RRC) signaling), and the beam set coordination takes a relatively long time. As a result, semi-static adjustments cannot completely eliminate the signal fading problem due to blocking. The beams in the beam set are fixed within a certain period of time, and even if one or more beams in the beam set are blocked, the beam set is still used for signal transmission. In the case of detecting data, it is necessary for the terminal to detect most or all of the signals for each beam before obtaining accurate information through channel decoding. When one or more beams are blocked, a signal carried on one or more beams cannot be detected, the terminal cannot maintain most of the information, and accurate information cannot be restored even through channel decoding. In particular, in the scenario of level-by-level transmission with medium and high modulation code rate scheme (MCS), the existing solution cannot overcome the signal fading problem due to blocking.

An embodiment of the present invention solves a signal fading problem due to blocking by providing a transmission method using a dynamically adjusted beam set, a base station, and a terminal.

According to one aspect, a transmission method using a dynamically adjusted beam set is provided. the base station transmits first indication information to the terminal by using first layer signaling, wherein the first indication information indicates a first beam set; the base station transmits second indication information to the terminal by using second layer signaling, wherein the second indication information indicates at least one beam in the first beam set; The base station transmits data to the terminal using the at least one beam.

In this embodiment of the present invention, the transmission period of signaling of the two layers can be different from each other, the beam can be conveniently and quickly adjusted, and the signaling bits used to transmit information about the beam can be reduced, The base station transmits information about the beam to the terminal using the signaling of the two layers. This effectively solves the problem of signal fading due to blocking.

In one possible embodiment, the first layer signaling is higher layer signaling and the second layer signaling is physical layer signaling or Media Access Control (MAC) layer signaling. According to this embodiment, the period of the higher layer signaling is relatively long and the period of the physical layer signaling or the MAC layer signaling is relatively short so that the beam can be adjusted quickly and conveniently.

In one possible embodiment, after the step of the base station transmitting data to the terminal using the at least one beam, the base station receives the beam state information transmitted by the terminal. Here, the beam state information indicates whether each of the at least one beam is available. According to this embodiment, the base station receives the beam state information fed back by the terminal so that the real-time channel state can be conveniently learned and the beam adjusted accordingly.

In one possible embodiment, the first indication information is a beam index of each beam in the first beam set or a codebook index of each beam in the first beam set.

In one possible embodiment, the second indication information uses an indication scheme of a bitmap based on the first beam set. According to this embodiment, when two types of indication information are used in combination, signaling resources used to dynamically adjust the beam may be reduced.

In one possible embodiment, the at least one beam is two beams, and the base station determines two antenna ports based on the two beams; The base station transmits the data to the terminal by using a space frequency block code (SFBC) technique based on the two antenna ports.

In one possible embodiment, the base station transmits the data to the terminal using the at least one beam periodically, and transmits a reference signal using a common port.

In one possible embodiment, the base station transmits the data and the reference signal to the terminal using the at least one beam periodically.

According to another aspect, a transmission method using a dynamically adjusted beam set is provided. the terminal receives first indication information from the base station using first layer signaling, wherein the first indication information indicates a first beam set; the terminal receives second indication information from the base station using second layer signaling, wherein the second indication information indicates at least one beam in the first beam set; The terminal receives data from the base station using the at least one beam.

In one possible embodiment, the first layer signaling is higher layer signaling and the second layer signaling is physical layer signaling or MAC layer signaling.

In one possible embodiment, after the step of the terminal receiving data from the base station using the at least one beam, the terminal transmits beam state information to the base station. Here, the beam state information indicates whether each of the at least one beam is available.

In one possible embodiment, the first indication information is a beam index of each beam in the first beam set or a codebook index of each beam in the first beam set.

In one possible embodiment, the second indication information uses an indication scheme of a bitmap based on the first beam set.

In one possible embodiment, the at least one beam is two beams, and the terminal determines that an SFBC transmit diversity technique is used in the transmission method of the base station; The terminal receives the data from the base station based on two antenna ports.

In one possible embodiment, the terminal determines that the transmission method of the base station is to periodically use the at least one beam to transmit the data and to transmit a reference signal by using a common port; The terminal periodically uses the at least one beam to receive the data from the base station, and receives the reference signal using the common port.

In one possible embodiment, the minimum resource unit of the same beam used to receive the data includes at least one of a resource element, a symbol, and a resource block.

In one possible embodiment, the terminal receives, from the base station using the at least one beam, the data and the reference signal that the base station periodically uses the at least one beam to transmit to the terminal.

In one possible embodiment, the minimum resource unit and the reference signal of the same beam used to receive the data are resource blocks.

According to another aspect, an embodiment of the present invention provides a base station. The base station may implement the function performed by the base station in the above-described method design, and the function may be implemented using hardware, or may be implemented by hardware executing corresponding software. The hardware or the software includes one or more modules corresponding to the functions.

In a possible design, the structure of the base station comprises a processor and a communication interface. The processor is configured to support the base station in performing a corresponding function of the above-described transmission method. The communication interface is configured to support communication between the base station and a terminal or between another entity and the base station. The base station may further include a memory. The memory is configured to be coupled to the processor, and the memory stores program instructions and data necessary for the base station.

According to another aspect, an embodiment of the present invention provides a terminal. The terminal may implement the function performed by the terminal in the method design described above. The function may be implemented using hardware, or may be implemented by hardware executing corresponding software. The hardware or the software includes one or more modules corresponding to the functions.

In a possible design, the structure of the terminal comprises a processor and a communication interface. The processor is configured to support the terminal in performing a corresponding function of the above-described transmission method. The communication interface is configured to support communication between the terminal and a base station or between another entity and the terminal. The terminal may further include a memory. The memory is configured to be coupled to the processor, and the memory stores necessary program instructions and data of the terminal.

According to another aspect, an embodiment of the present invention provides a communication system. The communication system includes the base station and the terminal described in the above aspect.

According to another aspect, an embodiment of the present invention provides a computer storage medium configured to store computer software instructions used by the above-described base station. Here, the computer software instructions include a program designed to perform the aspects described above.

According to another aspect, an embodiment of the present invention provides a computer storage medium configured to store computer software instructions used by the aforementioned terminal. Here, the computer software instructions include a program designed to perform the aspects described above.

According to another aspect, an embodiment of the present invention provides a computer program product. The computer program product includes instructions, when the program is executed by a computer, the instructions cause the computer to perform the functions performed by the base station in the method design described above.

According to another aspect, an embodiment of the present invention provides a computer program product. The computer program product includes instructions, and when the program is executed by a computer, the instructions enable the computer to perform a function performed by the terminal in the method design described above.

Compared with the prior art, in the embodiment of the present invention, the base station transmits first indication information to the terminal by using first layer signaling, wherein the first indication information indicates the first beam set; the base station transmits second indication information to the terminal by using second layer signaling, wherein the second indication information indicates at least one beam in the first beam set; The base station transmits data to the terminal using at least one beam. It can be seen from the above description that the transmission period of signaling of the two layers can be different from each other, the beam can be conveniently and quickly adjusted, and the signaling bits used to transmit information about the beam can be reduced, The information about the beam is transmitted to the terminal using signaling of two layers. This effectively solves the problem of signal fading due to blocking.

1 is a diagram schematically illustrating an application scenario based on a transmission method using a dynamically adjusted beam set according to an embodiment of the present invention. 2 is a communication diagram schematically illustrating a transmission method using a dynamically adjusted beam set according to an embodiment of the present invention. 3 is a communication diagram schematically illustrating another transmission method using a dynamically adjusted beam set according to an embodiment of the present invention. 4 is a communication diagram schematically illustrating another transmission method using a dynamically adjusted beam set according to an embodiment of the present invention. 5 is a communication diagram schematically illustrating another transmission method using a dynamically adjusted beam set according to an embodiment of the present invention. 6 is a structural diagram illustrating a base station according to an embodiment of the present invention. 7 is a structural diagram illustrating another base station according to an embodiment of the present invention. 8 is a structural diagram illustrating a terminal according to an embodiment of the present invention. 9 is a structural diagram of another terminal according to an embodiment of the present invention.

In order to make the object, technical solution, and advantage of the embodiment of the present invention clearer, the following clearly describes the technical solution of the embodiment of the present invention with reference to the accompanying drawings and embodiments of the embodiment of the present invention.

1 is a diagram schematically illustrating an application scenario of a transmission method using a dynamically adjusted beam set according to an embodiment of the present invention. Referring to FIG. 1 , a MIMO communication technique is used between a base station 101 and a terminal 102 . The base station 101 configures a set including N beams, and notifies the terminal 102 of the set using higher layer signaling. A beam in a beam set may be indicated using a beam index or a codebook index. A correspondence exists between the codebook index and the beam. For example, the codebook index may be a Precoding Matrix Indicator (PMI) in a Long Term Evolution (LTE) system. The base station 101 dynamically notifies the terminal 102 of M beams currently used for transmission. The M beams are a subset of the N beams. The base station 101 may dynamically indicate M beams used for current transmission in the manner of an N-bit bitmap. The base station 101 transmits data by periodically using M beams, and data formation may be performed at a resource element (RE) level, a symbol level, or a resource block level. Alternatively, the base station 101 transmits data using transmit diversity based on M beams. The terminal 102 receives beam configuration information from the base station 101 and detects data based on the beam configuration information. The terminal 102 performs measurement feedback based on the M beams dynamically indicated by the base station 101 .

2 is a communication diagram schematically illustrating a transmission method using a dynamically adjusted beam set according to an embodiment of the present invention. The transmission method may be based on the application scenario shown in FIG. 1 . Referring to FIG. 2 , the transmission method includes the following steps.

Step 201: The base station transmits the first indication information to the terminal by using the first layer signaling. Here, the first indication information indicates the first beam set.

In one example, the first layer signaling is higher layer signaling, such as RRC signaling. Higher layer signaling is usually transmitted at relatively long time intervals.

In one example, the first indication information is a beam index of each beam in the first beam set or a codebook index of each beam in the first beam set.

Step 202: The terminal receives first indication information from the base station using first layer signaling, and determines a first beam set based on the first indication information.

Step 203: The base station transmits second indication information to the terminal by using the second layer signaling. Here, the second indication information indicates at least one beam in the first beam set.

In one example, the second layer signaling is physical layer signaling or Media Access Control (MAC) layer signaling, such as scheduling signaling. Physical layer signaling or MAC layer signaling is usually transmitted at relatively short time intervals so that the used beam can be conveniently and dynamically adjusted.

In one example, the second indication information uses an indication scheme of a bitmap based on the first beam set. In this way, 1 may be used to indicate that the beam is used, and 0 may be used to indicate that the beam is not used, so that signaling transmission resources can be effectively saved; or 0 may be used to indicate that the beam is used, and 1 may be used to indicate that the beam is not used.

Step 204: The terminal receives second indication information from the base station by using second layer signaling, and determines at least one beam in the first beam set based on the second indication information.

Step 205: The base station transmits data to the terminal using at least one beam.

In one example, the at least one beam is two beams, the base station determines two antenna ports based on the two beams, and the base station determines the two antenna ports based on the two antenna ports. SFBC) technology to transmit data to the terminal.

In another example, the base station transmits data to the terminal using at least one beam periodically and transmits a reference signal using a common port. A minimum resource unit of the same beam used to transmit data includes at least one of a resource element, a symbol, and a resource block. When many beams are used to transmit data to the terminal, when the reference signal is transmitted using a common port, the number of ports used for transmitting the reference signal is reduced, so that transmission resources can be effectively reduced.

In another example, the base station transmits data and reference signals to the terminal using at least one beam periodically. Preferably, a minimum resource unit of the same beam used to transmit data and a reference signal is a resource block. If the same resource block may include a plurality of beams, and each beam needs to be used to transmit a corresponding reference signal, the overhead of the reference signal is very large. Therefore, if the resource block is selected as the minimum resource unit, it is possible to reduce the overhead of the reference signal as much as possible.

Step 206: The terminal receives data from the base station using at least one beam.

In this embodiment of the present invention, the base station may transmit one signaling indicating the transmission method to the terminal, and the terminal determines the transmission method of the base station based on the signaling.

In one example, the at least one beam is two beams, and the terminal determines that the SFBC transmit diversity technique is used for the transmission method of the base station; The terminal receives data from the base station based on the two antenna ports.

The base station may transmit one signaling indicating the transmission method to the terminal, and the terminal determines, based on the signaling, that the SFBC transmit diversity technique is used for the transmission method of the base station. In addition, one antenna port corresponds to one beam. A reference signal on each antenna port occupies a specific resource. The terminal acquires channel information for a corresponding antenna port or beam by detecting a reference signal on each antenna port for a specific resource. In the case of data, data of each antenna port is mapped to a corresponding time-frequency domain resource according to a predefined rule.

In another example, the terminal periodically uses at least one beam to receive data from the base station, and receives a reference signal using a common port. The minimum resource unit of the same beam used to receive the data includes at least one of a resource element, a symbol, and a resource block.

For example, the terminal receives, from the base station, a reference signal transmitted using a common port; determine channel information based on the reference signal; determine an equivalent channel of at least one beam based on the channel information and the information about the beam;

In another example, the terminal receives, from the base station by using at least one beam, data and a reference signal transmitted by the base station to the terminal by using the at least one beam periodically. The minimum resource unit and reference signal of the same beam used to receive data are resource blocks.

For example, the terminal receives a reference signal from the base station using at least one beam; performing joint channel estimation on a reference signal of a minimum resource unit of joint channel estimation; Receive data through the estimated channel.

Optionally, after step 206, the transmitting method further includes the following steps.

Step 207: The terminal transmits beam state information to the base station. Here, the beam state information indicates whether each of at least one beam is available.

In one example, the beam state information is channel quality indication (CQI) information corresponding to each of at least one beam.

In this embodiment of the present invention, so that the transmission period of signaling of the two layers can be different from each other, the beam can be conveniently and quickly adjusted, and the signaling bits used to transmit information about the beam can be reduced, the base station transmits information about a beam used to transmit data to the terminal using signaling of two layers. This effectively solves the problem of signal fading due to blocking.

3 is a communication diagram schematically illustrating another transmission method using a dynamically adjusted beam set according to an embodiment of the present invention. The transmission method may be based on the application scenario shown in FIG. 1, and the SFBC transmit diversity technique is specifically used to transmit data. Referring to FIG. 3 , the transmission method includes the following steps.

Step 301: The base station configures a beam set including N beams, and notifies the terminal of the beam set using higher layer signaling.

In one example, a beam in a beam set may be indicated using a beam index or a codebook index.

For example, the base station preferably selects N beams ({beam 1, beam 2, ..., and beam N}) based on feedback from the terminal to form a beam set. In general, the N beams are separated by a predetermined interval.

As an example, the base station may select N beams based on the channel quality information of each beam, preferably fed back by the terminal. The channel quality information may include an indication of whether the CQI and/or the beam can continue to be used.

When the channel quality information includes only CQI, the minimum level of CQI may be parsed by the terminal as an indication that the beam cannot be used continuously.

Step 302: The terminal receives higher layer signaling transmitted by the base station, and determines a beam set including N beams based on the higher layer signaling.

Step 303: The base station dynamically notifies the terminal of the two beams currently used for transmission. Here, the two beams are a subset of the N beams.

In one example, the base station may dynamically indicate the two beams used for the current transmission in the manner of an N-bit bitmap. For example, [101... 0], the signaling has a length of N. Here, 1 indicates that the beam is used, and 0 indicates that the beam is not used.

Step 304: The terminal receives a dynamic indication from the base station, and determines two beams to be used for current transmission based on the dynamic indication. Here, the two beams are a subset of the N beams.

Step 305: The base station virtualizes two antenna ports based on the beam notified to the terminal in step 303, and performs SFBC transmit diversity transmission based on the two antenna ports.

Step 306: The terminal detects data transmitted by the base station based on the two beams determined according to steps 302 and 304 as two beams currently used for transmission.

Step 307: After detecting the data, the terminal reports beam status information to the base station. The beam state information indicates whether each of the two beams can be used continuously.

For example, if the terminal detects that the signal quality of the beam p is obviously inferior to the signal quality of the beam q, or detects that the signal quality of the beam is lower than a receiving threshold, the terminal determines that the beam cannot be used .

In one example, the terminal may report the beam state information in the form of an N-bit bitmap.

In another example, the terminal performs measurement feedback based on two dynamically indicated beams. The measurement feedback is a CQI measurement feedback based on two beams.

Optionally, after step 307, the transmitting method further includes the following steps.

Step 308: The base station adjusts the used beam based on the beam state information reported by the terminal.

For example, the beam set notified by the base station to the terminal includes 10 beams respectively identified as beams 1 to 10. As beams used for current transmission, beams notified by the base station to the terminal are beam 1 and beam 2. When the beam state information fed back by the terminal indicates that beam 1 cannot be used, the base station may select one of beams 3 to 10 to replace beam 1, and use scheduling signaling to assign the beam to the terminal. to notify

In this embodiment of the present invention, the base station dynamically adjusts a beam used for SFBC, thereby preventing a heavily faded beam from being used to transmit data. This will increase the data transfer rate.

4 is a communication diagram schematically illustrating another transmission method using a dynamically adjusted beam set according to an embodiment of the present invention. The transmission method may be based on the application scenario shown in FIG. 1 , a technique using a beam periodically to transmit data is used, and a reference signal is transmitted using a common port. Referring to FIG. 4 , the transmission method includes the following steps.

Step 401: The base station configures a set including N beams, and notifies the terminal of the set using higher layer signaling.

In one example, a beam in a beam set may be indicated using a beam index or a codebook index.

In one example, the base station preferably selects N beams ({beam 1, beam 2, ..., and beam N}) based on feedback from the terminal to form a beam set. In general, the N beams are spaced apart at a predetermined interval.

As an example, the base station may select N beams based on the channel quality information of each beam, preferably fed back by the terminal. The channel quality information may include an indication as to whether the CQI and/or the beam can continue to be used.

When the channel quality information includes only CQI, the minimum level of CQI may be parsed by the terminal as an indication that the beam cannot be used continuously.

Step 402: The terminal receives higher layer signaling transmitted by the base station, and determines a beam set including N beams based on the higher layer signaling.

Step 403: The base station dynamically notifies the terminal of M beams currently used for transmission. Here, the M beams are a subset of the N beams.

In one example, the base station may dynamically indicate M beams used for current transmission in the manner of an N-bit bitmap. For example, [101... 0], the signaling has a length of N. Here, 1 indicates that the beam is used, and 0 indicates that the beam is not used.

Step 404: The terminal receives dynamic indication information of the base station, and determines M beams currently used for transmission based on the dynamic indication information. Here, the M beams are a subset of the N beams.

Step 405: The base station periodically transmits data using the M beams notified to the terminal in step 403, and transmits a reference signal using a common port.

Data formation may be performed at the RE level, at the symbol level, or at the resource block level.

The beam may be used periodically in the following manner, but is not limited thereto. For example, there are a total of three beams: beam 1, beam 2, and beam 3; Beam 1 is used first, then beam 2 is used, then beam 3 is used, then beam 1 is used; As such, the beam is used periodically.

Step 406: The terminal detects data transmitted by the base station based on the M beams determined according to steps 402 and 404 as M beams currently used for transmission.

In one example, the terminal acquires an equivalent channel based on channel information measured using a reference signal and information about a beam indicated by the base station. The equivalent channel is used for data detection.

Step 407: After detecting the data, the terminal reports beam status information. The beam state information indicates whether each of the M beams can be continuously used.

For example, if the terminal detects that the signal quality of the beam p is obviously inferior to the signal quality of the beam q, or detects that the signal quality of the beam is lower than a receiving threshold, the terminal determines that the beam cannot be used . For example, there are a total of M beams, and if the signal quality difference between any two beams is greater than a threshold value, it is determined that the beam with poorer signal quality cannot be used.

In one example, the terminal may report the beam state information in the form of an N-bit bitmap.

In another example, the terminal performs measurement feedback based on the dynamically indicated M beams. The measurement feedback is CQI measurement feedback based on M beams.

Optionally, after step 407, the transmitting method further includes the following steps.

Step 408: The base station adjusts the used beam based on the beam status information reported by the terminal.

For example, the beam set notified by the base station to the terminal includes 10 beams respectively identified as beams 1 to 10. Beams that the base station notifies the terminal as beams currently used for transmission are beam 1, beam 2, and beam 3. When the beam state information fed back by the terminal indicates that beam 1 and beam 2 cannot be used, the base station selects two beams from among beams 4 to 10, replaces beam 1 and beam 2, and uses scheduling signaling to The beams may be notified to the terminal.

In this embodiment of the present invention, the base station uses the beam periodically to dynamically adjust the beam used to transmit data, thereby preventing a heavily faded beam from being used to transmit data. This will help speed up data transfer.

5 is a communication diagram schematically illustrating another transmission method using a dynamically adjusted beam set according to an embodiment of the present invention. The transmission method may be based on the application scenario shown in FIG. 1, and a technique using a beam periodically is specifically used to transmit data, and a reference signal and data are transmitted together using the selected beam. Referring to FIG. 5 , the transmission method includes the following steps.

Step 501: The base station configures a set including N beams, and notifies the set to the terminal using higher layer signaling.

In one example, a beam in a beam set may be indicated using a beam index or a codebook index.

In one example, the base station preferably selects N beams ({beam 1, beam 2, ..., and beam N}) based on feedback from the terminal to form a beam set. In general, the N beams are spaced apart from each other at a predetermined interval.

As an example, the base station may select N beams based on the channel quality information of each beam, preferably fed back by the terminal. The channel quality information may include an indication as to whether the CQI and/or the beam can continue to be used.

If the channel quality information includes only CQI, the minimum level of CQI may be parsed by the terminal as an indication that the beam cannot be used continuously.

Step 502: The terminal receives higher layer signaling transmitted by the base station, and determines a beam set including N beams based on the higher layer signaling.

Step 503: The base station dynamically notifies the terminal of M beams currently used for transmission. Here, the M beams are a subset of the N beams.

In one example, the base station may dynamically indicate M beams used for current transmission in the manner of an N-bit bitmap. For example, [101... 0], the signaling has a length of N. Here, 1 indicates that the beam is used, and 0 indicates that the beam is not used.

Step 504: The terminal receives dynamic indication information of the base station, and determines M beams currently used for transmission based on the dynamic indication information. Here, the M beams are a subset of the N beams.

Step 505: The base station periodically uses the M beams notified to the terminal in step 503 to transmit data and a reference signal.

In one example, data formation may be performed at the resource block level, thereby reducing resource consumption.

Step 506: The terminal detects data transmitted by the base station based on the M beams determined according to steps 502 and 504 as M beams currently used for transmission.

In one example, the terminal detects data based on the measured channel using the reference signal. The granularity of co-channel estimation coincides with the granularity of data formation.

Step 507: After detecting the data, the terminal reports beam state information. The beam state information indicates whether each of the M beams can be continuously used.

For example, if the terminal detects that the signal quality of the beam p is obviously inferior to the signal quality of the beam q, or detects that the signal quality of the beam is lower than a receiving threshold, the terminal determines that the beam cannot be used . For example, there are a total of M beams, and if the signal quality difference between any two beams is greater than a threshold value, it is determined that the beam with poorer signal quality cannot be used.

In one example, the terminal may report the beam state information in the form of an N-bit bitmap.

In another example, the terminal performs measurement feedback based on the dynamically indicated M beams. The measurement feedback is CQI measurement feedback based on M beams.

Optionally, after step 507, the transmitting method further includes the following steps.

Step 508: The base station adjusts the used beam based on the beam status information reported by the terminal.

For example, the beam set notified by the base station to the terminal includes 10 beams respectively identified as beams 1 to 10. Beams that the base station notifies the terminal as beams currently used for transmission are beam 1, beam 2, and beam 3. When the beam state information fed back by the terminal indicates that beam 1 and beam 2 cannot be used, the base station selects two beams from among beams 4 to 10, replaces beam 1 and beam 2, and uses scheduling signaling to The beams may be notified to the terminal.

In this embodiment of the present invention, the base station uses the beam periodically to dynamically adjust the beam used to transmit data, thereby preventing a heavily faded beam from being used to transmit data. This will help speed up data transfer.

The pilot mode in the embodiment shown in FIG. 4 is different from the pilot mode in the embodiment shown in FIG. 5 . In the embodiment shown in Figure 4, a common pilot is used; At the transmitting end, a common pilot need not be formed; At the receiving end, after the common pilot is detected, an equivalent channel of data can be obtained only after additionally multiplying the common pilot by a forming matrix. In the embodiment shown in Figure 5, a forming pilot is used; At the transmitting end, the forming pilot needs to be formed, and at the receiving end, after the forming pilot is detected, an equivalent channel of data is directly obtained. The forming pilot is the reference signal.

6 is a structural diagram of a base station according to an embodiment of the present invention. The base station is configured to perform a transmission method using a dynamically adjusted beam set according to an embodiment of the present invention. The base station includes a processing module 601 and a communication module 602 .

the processing module 601 controls the communication module 602 to transmit first indication information to the terminal by using the first layer signaling, wherein the first indication information indicates a first beam set; control the communication module 602 to transmit second indication information to the terminal by using second layer signaling, wherein the second indication information indicates at least one beam in the first beam set; and control the communication module 602 to transmit data to the terminal using at least one beam.

In one example, the first layer signaling is higher layer signaling and the second layer signaling is physical layer signaling or MAC layer signaling.

In one example, the processing module 601 is further configured to control the communication module 602 to transmit data to the terminal by using at least one beam, and then to receive the beam state information transmitted by the terminal. ) to control. Here, the beam state information indicates whether each of at least one beam is available.

In one example, the first indication information is a beam index of each beam in the first beam set or a codebook index of each beam in the first beam set.

In one example, the second indication information uses an indication scheme of a bitmap based on the first beam set.

In one example, the at least one beam is two beams, and the processing module 601 is specifically configured to determine two antenna ports based on the two beams; and control the communication module 602 to transmit data to the terminal by using the SFBC transmit diversity technique based on the two antenna ports.

In one example, the processing module 601 is specifically configured to control the communication module 602 to transmit data to the terminal by using the at least one beam periodically, and to control the reference signal using the common port.

In one example, the processing module 601 is specifically configured to control the communication module 602 to transmit data and a reference signal to the terminal by using the at least one beam periodically.

The base station may further include a storage module 603 configured to store the program code and data of the base station.

The processing module 601 is a processor or controller, for example, a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate. It may be an array (Field-Programmable Gate Array, FPGA), or other programmable logic device, a transistor logic device, a hardware component, or a combination thereof. The controller/processor may implement or execute various examples of the various illustrative logical blocks, modules, and circuits described with reference to the present disclosure. Alternatively, the processor may be a combination of processors implementing arithmetic functions, eg, one or more microprocessors, or a combination of a DSP and a microprocessor. The communication module 602 may be a communication interface, or a transceiver, or a transceiver circuit, or the like. A communication interface is a generic term and may include one or more interfaces. The storage module 603 may be a memory.

When the processing module 601 is a processor, the communication module 602 is a communication interface, the storage module 603 is a memory, and the base station provided in this embodiment of the present invention may be the base station shown in FIG.

Referring to FIG. 7 , the base station 700 includes a processor 702 , a communication interface 703 , and a memory 701 . Optionally, the base station 700 may further include a bus 704 . Communication interface 703 , processor 702 , and memory 701 may be coupled to each other using bus 704 . The bus 704 may be a peripheral component interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus 704 may be classified into an address bus, a data bus, a control bus, and the like. For ease of presentation, only one bold line is used to indicate the bus in FIG. 7 , but this does not imply that there is only one bus or only one type of bus.

8 is a structural diagram of a terminal according to an embodiment of the present invention. The terminal is configured to perform a transmission method using a dynamically adjusted beam set according to an embodiment of the present invention. The terminal includes a processing module 801 and a communication module 802 .

the processing module 801 controls the communication module 802 to receive first indication information from the base station by using the first layer signaling, wherein the first indication information indicates a first beam set; control the communication module 802 to receive second indication information from the base station using second layer signaling, wherein the second indication information indicates at least one beam in the first beam set; and control the communication module 802 to receive data from a base station using the at least one beam.

In one example, the first layer signaling is higher layer signaling and the second layer signaling is physical layer signaling or MAC layer signaling.

In one example, the processing module 801 additionally controls the communication module 802 to transmit the beam state information to the base station after controlling the communication module 802 to receive data from the base station using at least one beam. configured to do Here, the beam state information indicates whether each of at least one beam is available.

In one example, the first indication information is a beam index of each beam in the first beam set or a codebook index of each beam in the first beam set.

In one example, the second indication information uses an indication scheme of a bitmap based on the first beam set.

In one example, the at least one beam is two beams, and the processing module 801 specifically determines that an SFBC transmit diversity technique is used for a transmission method of the base station; and control the communication module 802 to receive data from the base station based on the two antenna ports.

In one example, the processing module 801 specifically determines that the transmission method of the base station is to transmit data by using at least one beam periodically and to transmit a reference signal by using a common port; and receive data from the base station using at least one beam periodically and control the communication module 802 to receive a reference signal using a common port.

In one example, the processing module 801 is specifically configured to receive the reference signal and data transmitted by the base station by the base station to the terminal by the base station periodically using the at least one beam, from the base station by using the at least one beam. ) to control.

The terminal may further include a storage module 803 configured to store the program code and data of the terminal.

The processing module 801 is a processor or controller, for example, a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable It may be a field-programmable gate array (FPGA), or other programmable logic device, or a transistor logic device, a hardware component, or a combination thereof. The controller/processor may implement or execute various examples of the various illustrative logical blocks, modules, and circuits described with reference to the present disclosure. Alternatively, the processor may be a combination of processors implementing arithmetic functions, eg, one or more microprocessors, or a combination of a DSP and a microprocessor. The communication module 802 may be a communication interface, or a transceiver, or a transceiver circuit, or the like. A communication interface is a generic term and may include one or more interfaces. The storage module 803 may be a memory.

When the processing module 801 is a processor, the communication module 802 is a communication interface, the storage module 803 is a memory, and the terminal provided in this embodiment of the present invention may be the terminal shown in FIG.

Referring to FIG. 9 , the terminal 900 includes a processor 902 , a communication interface 903 , and a memory 901 . Optionally, the terminal 900 may further include a bus 904 . Communication interface 903 , processor 902 , and memory 901 may be coupled to each other using bus 904 . The bus 904 may be a peripheral component interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus 904 may be classified into an address bus, a data bus, a control bus, and the like. For ease of presentation, only a single bold line is used to represent the bus in FIG. 9 , but this does not imply that there is only one bus or only one type of bus.

Those skilled in the art will further appreciate that, together with the examples described in the embodiments disclosed herein, units and algorithm steps may be implemented by electronic hardware, or computer software, or a combination thereof. To clearly illustrate the compatibility between hardware and software, the foregoing has generally described the configuration and steps of each example according to function. In order to clearly explain the interchangeability between hardware and software, the foregoing has generally described the configuration and steps of each example according to a function. Whether these functions are performed by hardware or software depends on specific applications and design constraints of technical solutions. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be considered as a departure from the scope of the present invention.

Those skilled in the art will understand that all or part of the steps in each of the above-described methods of the embodiments may be implemented by a program instructing a processor. The above-described program may be stored in a computer-readable storage medium. A storage medium may be a non-transitory medium, such as random access memory, read-only memory, flash memory, hard disk, solid state drive, magnetic tape, floppy. It may be a floppy disk, or an optical disk, or any combination thereof. The foregoing description is merely a better specific embodiment of the present invention, and is not intended to limit the protection scope of the present invention.