Method and device for measuring channel state information

Method and device for measuring channel state informationTechnical field

[0001] The embodiments of the present invention relate to the field of communications, and more specifically, to a method and device for measuring channel state information.

Background technique

[0002] In a wireless communication system, in order to improve the scheduling efficiency of the base station, user equipment (User Equipment, UE) needs to measure channel state information (Channel State-Information, CSI) and report the measurement result of the CSI measurement to the base station. In this way, The base station may perform resource scheduling according to the CSI measurement results reported by the UE. The CSI measurement results reported by the UE include wideband CSI and subband CSI. The wideband CSI is the CSI obtained by the UE measuring the bandwidth of the entire downlink system. Band CSI is the CSI obtained by the UE separately measuring part or all of the subbands included in the entire downlink system bandwidth.

Summary of the invention

[0003] The embodiments of the present invention provide a method and device for measuring CSI, which can also implement wideband CSI and subband CSI measurement.

[0004] In a first aspect, a method for measuring CSI is provided, including: a first device determines a first measurement frequency band and a second measurement frequency band, the first measurement frequency band is used for wideband CSI measurement, and the second The measurement frequency band is used for sub-band CSI measurement, where the bandwidth of the first measurement frequency band is smaller than the downlink transmission bandwidth and the first measurement frequency band and the second measurement frequency band do not completely overlap; the wideband CSI measurement is performed on the first measurement frequency band ; According to the measurement result obtained by the wideband CSI measurement, subband CSI measurement is performed on the second measurement frequency band.

[0005] With reference to the first aspect, in a first possible implementation manner, the wideband CSI measurement includes at least one of the following measurements: rank indicator RI measurement, wideband channel quality indicator CQI measurement, and wideband precoding indicator PMI measurement.

[0006] In combination with the foregoing possible implementation manners, in a second possible implementation manner, the first measurement frequency band does not completely overlap with the second measurement frequency band, including: the first measurement frequency band and the second measurement frequency band are completely different from each other. Overlap; or part of the frequency band in the first measurement frequency band overlaps with part of the frequency band in the second measurement frequency band; or the first measurement frequency band is a part of the second measurement frequency band.

[0007] In combination with the foregoing possible implementation manners, in a third possible implementation manner, the determining the first measurement frequency band and the second measurement frequency band includes: determining the first measurement frequency band according to the CSI measurement frequency band indication information sent by the network side device At least one of the measurement frequency band and the second measurement frequency band.

[0008] With reference to the third possible implementation manner, in the fourth possible implementation manner, at least one of the first measurement frequency band and the second measurement frequency band is determined according to the CSI measurement frequency band indication information sent by the network side device. One method includes: determining the first measurement frequency band from at least two first candidate measurement frequency bands according to the CSI measurement frequency band indication information sent by the network side device; and/or according to the CSI measurement frequency band indication sent by the network side device Information, the second measurement frequency band is determined from at least two second candidate measurement frequency bands.

[0009] With reference to the third possible implementation manner, in the fifth possible implementation manner, the CS I measurement frequency band indication information includes at least one of the following information: first adjustment frequency band information and second adjustment frequency band information, According to the network side setting

Preparing the sent CSI measurement frequency band indication information, and determining at least one of the first measurement frequency band and the second measurement frequency band, including: determining that the first measurement frequency band is a frequency band corresponding to the first adjustment frequency band information. The frequency band obtained by adjusting the measurement frequency band used for wideband CSI measurement; and/or determining that the second measurement frequency band is the measurement frequency band used for the last subband CSI measurement based on the frequency bandwidth corresponding to the second adjustment frequency band information The frequency band obtained after adjustment.

[0010] In combination with any one of the second to fifth possible implementations, in the sixth possible implementation, the CSI measurement band indication information is semi-static signaling or dynamic signaling .

[0011] In combination with the foregoing possible implementation manners, in a seventh possible implementation manner, if the UE is configured with at least one CSI process, the at least one CSI process corresponds to the same first measurement frequency band and the same second measurement frequency band Or the at least one CSI process corresponds to the same first measurement frequency band and the first CSI process and the second CSI process in the at least one CSI process correspond to different second measurement frequency bands; or the at least one CSI process corresponds to the same second The frequency band is measured, and the first CSI process and the second CSI process in the at least one CSI process correspond to different first measurement frequency bands.

[0012] In combination with the foregoing possible implementation manners, in an eighth possible implementation manner, if the UE is configured with at least two subframe sets, the at least two subframe sets correspond to the same first measurement frequency band and the same second subframe set. Measurement frequency band; or the at least two subframe sets correspond to the same first measurement frequency band, and the first subframe set and the second subframe set in the at least two subframe sets correspond to different second measurement frequency bands; or the at least two subframe sets correspond to different second measurement frequency bands; or The frame set corresponds to the same second measurement frequency band, and the first subframe set and the second subframe set of the at least two subframe sets correspond to different first measurement frequency bands.

[0013] In combination with the foregoing possible implementation manners, in a ninth possible implementation manner, before performing broadband CSI measurement on the first measurement frequency band, the method further includes: receiving CSI report indication information sent by the network side device, and The CSI report indication information is used to instruct the first device to report CSI to the network-side device; performing broadband CSI measurement on the first measurement frequency band includes: performing broadband on the first measurement frequency band according to the CSI report indication information CSI measurement;

[0014] The method further includes: reporting the measurement result of the broadband CSI measurement and the measurement result of the subband CSI measurement to the network side device.

[0015] In a second aspect, a method for measuring channel state information CSI is provided, including: a network-side device determines a CSI measurement frequency band used when a first device performs CSI measurement, and the CSI measurement frequency band includes at least one of the following frequency bands One type: a first measurement frequency band used for wideband CSI measurement and a second measurement frequency band used for subband CSI measurement, wherein the bandwidth of the first measurement frequency band is smaller than the downlink transmission bandwidth and the first measurement frequency band and the second measurement frequency band are 2. The measurement frequency bands are not completely overlapped; sending CSI measurement frequency band indication information to the first device, where the CSI measurement frequency band indication information is used to indicate the CSI measurement frequency band.

[0016] With reference to the second aspect, in a first possible implementation manner, the wideband CSI measurement includes at least one of the following measurements: rank indicator RI measurement, wideband channel quality indicator CQI measurement, and wideband precoding indicator PMI measurement.

[0017] In combination with the foregoing possible implementation manners, in a second possible implementation manner, the first measurement frequency band does not completely overlap with the second measurement frequency band, including: the first measurement frequency band and the second measurement frequency band are completely different from each other. Overlap; or part of the frequency band in the first measurement frequency band overlaps with part of the frequency band in the second measurement frequency band; or the first measurement frequency band is a part of the second measurement frequency band.

[0018] In combination with the foregoing possible implementation manners, in a third possible implementation manner, the determining the CSI measurement frequency band used when the first device performs CSI measurement includes: receiving at least two first candidate CSI from the first device The first measurement frequency band used when the first device performs RI measurement is determined in the measurement frequency band; and/or the first device is used when it is determined that the first device performs sub-band CSI measurement from at least two second candidate CSI measurement frequency bands of the first device The second measurement frequency band.

[0019] In combination with the foregoing possible implementation manners, in a fourth possible implementation manner, the CSI measurement frequency band indication information includes at least one of the following information: first adjustment frequency band information and second adjustment frequency band information, where the The first adjustment frequency band information is used to indicate that the first measurement frequency band is a frequency band obtained by the first device after adjusting the measurement frequency band used for the last wideband CSI measurement according to the frequency band bandwidth corresponding to the first adjustment frequency band information. The second adjustment frequency band information is used to indicate that the second measurement frequency band is a frequency band obtained by the first device after adjusting the measurement frequency band used for the last subband CSI measurement according to the frequency band bandwidth corresponding to the second adjustment frequency band information.

[0020] In combination with the foregoing possible implementation manners, in a fifth possible implementation manner, the CSI measurement frequency band indication information is semi-static signaling or dynamic signaling.

[0021] In combination with the foregoing possible implementation manners, in a sixth possible implementation manner, if the UE is configured with at least one CSI process, the at least one CSI process corresponds to the same first measurement frequency band and the same second measurement frequency band Or the at least one CSI process corresponds to the same first measurement frequency band and the first CSI process and the second CSI process in the at least one CSI process correspond to different second measurement frequency bands; or the at least one CSI process corresponds to the same second The frequency band is measured, and the first CSI process and the second CSI process in the at least one CSI process correspond to different first measurement frequency bands.

[0022] In combination with the foregoing possible implementation manners, in a seventh possible implementation manner, if the UE is configured with at least two subframe sets, the at least two subframe sets correspond to the same first measurement frequency band and the same second measurement frequency band. Measurement frequency band; or the at least two subframe sets correspond to the same first measurement frequency band, and the first subframe set and the second subframe set in the at least two subframe sets correspond to different second measurement frequency bands; or the at least two subframe sets correspond to different second measurement frequency bands; or The frame set corresponds to the same second measurement frequency band, and the first subframe set and the second subframe set of the at least two subframe sets correspond to different first measurement frequency bands.

[0023] In combination with the foregoing possible implementation manners, in an eighth possible implementation manner, the method further includes: sending CSI reporting instruction information to the first device, where the CSI reporting instruction information is used to instruct the first device to report CSI ; Receive the measurement result of the CSI measurement performed by the first device according to the CSI report indication information and the CSI measurement frequency band indication information.

[0024] In a third aspect, a device for measuring channel state information CSI is provided, including: a determining module for determining a first measurement frequency band and a second measurement frequency band, the first measurement frequency band is used to perform wideband CSI measurement , The second measurement frequency band is used for sub-band CSI measurement, wherein the bandwidth of the first measurement frequency band is smaller than the downlink transmission bandwidth and the first measurement frequency band does not completely overlap the second measurement frequency band; the first measurement module is used for Perform wideband CSI measurement on the first measurement frequency band determined by the determining module; a second measurement module for performing subbands on the second measurement frequency band according to the measurement result obtained by the first measurement module performing the wideband CSI measurement CSI measurement.

[0025] With reference to the third aspect, in a first possible implementation manner, the wideband CSI measurement includes at least one of the following measurements: rank indicator RI measurement, wideband channel quality indicator CQI measurement, and wideband precoding indicator PMI measurement.

[0026] In combination with the foregoing possible implementation manners, in a second possible implementation manner, the first measurement frequency band and the second measurement frequency band do not completely overlap, including: the first measurement frequency band and the second measurement frequency band are completely different from each other. Overlap; or part of the frequency band in the first measurement frequency band overlaps with part of the frequency band in the second measurement frequency band; or the first measurement frequency band is a part of the second measurement frequency band.

[0027] In combination with the foregoing possible implementation manners, in a third possible implementation manner, the determining module is specifically configured to determine the first measurement frequency band and the second measurement frequency band according to the CSI measurement frequency band indication information sent by the network side device. At least one of.

[0028] With reference to the third possible implementation manner, in the fourth possible implementation manner, the determining module includes: a first determining unit configured to determine from at least the CSI measurement frequency band indication information sent by the network side device The first measurement frequency band is determined from the two first candidate measurement frequency bands; and/or the second determination unit is configured to determine the CSI according to the CSI sent by the network side device

The measurement frequency band indication information determines the second measurement frequency band from at least two second candidate measurement frequency bands.

[0029] With reference to the third possible implementation manner, in the fifth possible implementation manner, the CS I measurement frequency band indication information includes at least one of the following information: first adjustment frequency band information and second adjustment frequency band information, The determining module includes: a third determining unit for determining that the first measurement frequency band is the frequency band obtained after adjusting the measurement frequency band used in the last wideband CSI measurement according to the frequency band bandwidth corresponding to the first adjustment frequency band information; And/or a fourth determining unit, configured to determine that the second measurement frequency band is a frequency band obtained after adjusting the measurement frequency band used for the last subband CSI measurement according to the frequency bandwidth corresponding to the second adjustment frequency band information.

[0030] In combination with any one of the second to fifth possible implementations, in the sixth possible implementation, the CSI measurement frequency band indication information is semi-static signaling or dynamic signaling .

[0031] In combination with the foregoing possible implementation manners, in a seventh possible implementation manner, if the UE is configured with at least one CSI process, the at least one CSI process corresponds to the same first measurement frequency band and the same second measurement frequency band Or the at least one CSI process corresponds to the same first measurement frequency band and the first CSI process and the second CSI process in the at least one CSI process correspond to different second measurement frequency bands; or the at least one CSI process corresponds to the same second The frequency band is measured, and the first CSI process and the second CSI process in the at least one CSI process correspond to different first measurement frequency bands.

[0032] In combination with the foregoing possible implementation manners, in an eighth possible implementation manner, if the UE is configured with at least two subframe sets, the at least two subframe sets correspond to the same first measurement frequency band and the same second measurement frequency band. Measurement frequency band; or the at least two subframe sets correspond to the same first measurement frequency band, and the first subframe set and the second subframe set in the at least two subframe sets correspond to different second measurement frequency bands; or the at least two subframe sets correspond to different second measurement frequency bands; or The frame set corresponds to the same second measurement frequency band, and the first subframe set and the second subframe set of the at least two subframe sets correspond to different first measurement frequency bands.

[0033] In combination with the foregoing possible implementation manners, in a ninth possible implementation manner, the device further includes: a receiving module, configured to receive before the first measurement module performs broadband CSI measurement on the first measurement frequency band CSI reporting indication information sent by the network-side device, where the CSI reporting indication information is used to instruct the first device to report CSI to the network-side device; the first measurement module is specifically configured to report the indication information according to the CSI received by the receiving module, The broadband CSI measurement is performed on the first measurement frequency band; the device further includes: a reporting module, configured to report to the network side equipment the measurement result of the broadband CSI measurement performed by the first measurement module and the second measurement module to perform the sub Measurement results with CSI measurement.

[0034] In a fourth aspect, an apparatus for measuring channel state information CSI is provided, including: a determining module, configured to determine a CSI measurement frequency band used when a first device performs CSI measurement, and the CSI measurement frequency band includes the following frequency bands At least one of: a first measurement frequency band used for wideband CSI measurement and a second measurement frequency band used for sub-band CSI measurement, wherein the bandwidth of the first measurement frequency band is smaller than the downlink transmission bandwidth and the first measurement frequency band It does not completely overlap with the second measurement frequency band; the sending module is used to send CSI measurement frequency band indication information to the first device, and the CSI measurement frequency band indication information is used to indicate the CSI measurement frequency band determined by the determining module.

[0035] With reference to the fourth aspect, in a first possible implementation manner, the wideband CSI measurement includes at least one of the following measurements: rank indicator RI measurement, wideband channel quality indicator CQI measurement, and wideband precoding indicator PMI measurement.

[0036] In combination with the foregoing possible implementation manners, in a second possible implementation manner, the first measurement frequency band does not completely overlap the second measurement frequency band, including: the first measurement frequency band and the second measurement frequency band are completely different from each other. Overlap; or part of the frequency band in the first measurement frequency band overlaps with part of the frequency band in the second measurement frequency band; or the first measurement frequency band is a part of the second measurement frequency band.

[0037] In combination with the foregoing possible implementation manners, in a third possible implementation manner, the determining module is specifically configured to: determine that the first device performs measurement from at least two first candidate CSI measurement frequency bands of the first device The first one used in RI measurement

Measurement frequency band; and/or determine the second measurement frequency band used by the first device when performing subband CSI measurement from at least two second candidate CSI measurement frequency bands of the first device.

[0038] In combination with the foregoing possible implementation manners, in a fourth possible implementation manner, the CSI measurement frequency band indication information includes at least one of the following information: first adjustment frequency band information and second adjustment frequency band information, where the The first adjustment frequency band information is used to indicate that the first measurement frequency band is a frequency band obtained by the first device after adjusting the measurement frequency band used for the last wideband CSI measurement according to the frequency band bandwidth corresponding to the first adjustment frequency band information. The second adjustment frequency band information is used to indicate that the second measurement frequency band is a frequency band obtained after the first device adjusts the measurement frequency band used for the last subband CSI measurement according to the frequency band bandwidth corresponding to the second adjustment frequency band information.

[0039] In combination with the foregoing possible implementation manners, in a fifth possible implementation manner, the CSI measurement frequency band indication information is semi-static signaling or dynamic signaling.

[0040] In combination with the foregoing possible implementation manners, in a sixth possible implementation manner, if the UE is configured with at least one CSI process, the at least one CSI process corresponds to the same first measurement frequency band and the same second measurement frequency band Or the at least one CSI process corresponds to the same first measurement frequency band and the first CSI process and the second CSI process in the at least one CSI process correspond to different second measurement frequency bands; or the at least one CSI process corresponds to the same second The frequency band is measured, and the first CSI process and the second CSI process in the at least one CSI process correspond to different first measurement frequency bands.

[0041] In combination with the foregoing possible implementation manners, in the seventh possible implementation manner, if the UE is configured with at least two subframe sets, the at least two subframe sets correspond to the same first measurement frequency band and the same second measurement frequency band. Measurement frequency band; or the at least two subframe sets correspond to the same first measurement frequency band, and the first subframe set and the second subframe set in the at least two subframe sets correspond to different second measurement frequency bands; or the at least two subframe sets correspond to different second measurement frequency bands; or The frame set corresponds to the same second measurement frequency band, and the first subframe set and the second subframe set of the at least two subframe sets correspond to different first measurement frequency bands.

[0042] In combination with the foregoing possible implementation manners, in an eighth possible implementation manner, the sending module is further configured to send CSI report indication information to the first device, and the CSI report indication information is used to instruct the first device to report CSI; The device also includes: a receiving module, configured to receive the CSI measurement result of the CSI measurement performed by the first device according to the CSI report indication information and the CSI measurement frequency band indication information sent by the sending module.

[0043] Based on the above technical solutions, in the method and device for measuring CSI provided by the embodiments of the present invention, the first device performs broadband CSI measurement on a first measurement frequency band whose bandwidth is less than the downlink transmission bandwidth, and compares it with the first measurement. Performing sub-band CSI measurement on the second measurement frequency band with incompletely overlapping frequency bands can obtain the measurement results of wideband CSI and sub-band CSI, and further report the measurement results to the network side device, so that the network side device can be based on the first measurement result. The measurement result reported by a device schedules the first device, so compared to the scheduling scheme that the base station cannot obtain the CS I measurement result reported by the UE, the scheduling efficiency of the network side device can be improved, and the system performance and user experience can be improved.

Description of the drawings

[0044] In order to more clearly describe the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings that need to be used in the description of the embodiments of the present invention or the prior art. Obviously, the drawings described below are merely For some of the embodiments of the present invention, those of ordinary skill in the art can obtain other drawings based on these drawings without creative work.

[0045] FIG. 1 is a schematic flowchart of a method for measuring CSI according to an embodiment of the present invention.

[0046] FIG. 2 is another schematic flowchart of a method for measuring CSI according to an embodiment of the present invention.

[0047] FIG. 3 is a schematic diagram of frequency band allocation in a method for measuring CSI according to an embodiment of the present invention.

[0048] FIG. 4 is a schematic block diagram of an apparatus for measuring CSI according to an embodiment of the present invention.

[0049] FIG. 5 is a schematic block diagram of an apparatus for measuring CS I according to another embodiment of the present invention.

[0050] FIG. 6 is a schematic block diagram of a device for measuring CS I according to another embodiment of the present invention.

[0051] FIG. 7 is a schematic block diagram of a device for measuring CS I according to still another embodiment of the present invention.

Detailed ways

[0052] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. . Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0053] It should be understood that the technical solutions of the embodiments of the present invention can be applied to various communication systems, for example: Global System of Mobile communication ("GSM") system, Code Division Multiple Access (Code Division Multiple Access) , Referred to as "CDMA") system, Wideband Code Division Multiple Access ("WCDMA") system, General Packet Radio Service ("GPRS"), Long Term Evolution (Long Term Evolution, abbreviated as "LTE") system, LTE Frequency Division Duplex (abbreviated as "FDD") system, LTE Time Division Duplex (abbreviated as "TDD"), general mobile communication system ( Universal Mobile Telecommunication System, referred to as "UMTS"), Worldwide Interoperability for Microwave Access, referred to as "WiMAX") communication system, etc.

[0054] It should also be understood that in the embodiments of the present invention, user equipment (User Equipment, referred to as "UE") may be referred to as a terminal (Terminal), a mobile station (Mobile Station, referred to as "MS"), or a mobile terminal. (Mobile Terminal), etc., the user equipment can communicate with one or more core networks via a radio access network (Radio Access Network, referred to as "RAN"). For example, the user equipment can be a mobile phone (or "cellular"). "Phone), computers with mobile terminals, etc., for example, user equipment can also be portable, pocket-sized, handheld, built-in computer or vehicle-mounted mobile devices, which exchange voice and/or data with the wireless access network.

[0055] It should also be understood that, in the embodiment of the present invention, the base station may be a base station (Base Transceiver Station, referred to as "BTS") in GSM or CDMA, a base station (NodeB) in WCDMA, or An evolved Node B (evolved Node B, referred to as "eNB" or "e-NodeB" for short) in LTE, which is not limited by the present invention.

[0056] The method and device for measuring CSI provided by the present invention are mainly applied to scenarios where broadband CSI measurement and subband CSI measurement are performed on one carrier, but can also be applied to other scenarios, which is not limited in the embodiment of the present invention.

[0057] FIG. 1 shows a schematic flowchart of a method 100 for measuring CSI according to an embodiment of the present invention. The method may be executed by a first device, where the first device may be a UE, but this The embodiment of the invention is not limited to this. As shown in Figure 1, the method 100 includes:

[0058] S110. The first device determines a first measurement frequency band and a second measurement frequency band, where the first measurement frequency band is used for broadband CSI measurement, and the second measurement frequency band is used for subband CSI measurement, where the first measurement The bandwidth of the frequency band is smaller than the downlink transmission bandwidth and the first measurement frequency band and the second measurement frequency band do not completely overlap.

[0059] The downlink transmission bandwidth may be a downlink system bandwidth. Optionally, if the first device is a UE, the downlink transmission bandwidth may be a bandwidth for downlink transmission between at least one serving cell of the UE and the UE, where , The bandwidth for downlink transmission may be less than the downlink system bandwidth; or the downlink transmission bandwidth is for another UE to perform equipment and equipment with the UE

(Device to Device, D2D) transmission bandwidth during communication, but the embodiment of the present invention is not limited to this.

[0060] The first measurement frequency band is used to perform wideband CSI measurement. Optionally, the wideband CSI measurement may include at least one of the following measurements: Rank Indicator (RI) measurement, wideband precoding matrix indicator ( Pre-coding Matrix Indicator (PMI) measurement and wideband channel quality indicator (Channel Quality Indicator, CQI) measurement. Accordingly, the first measurement frequency band is used to perform at least one of the following measurements: RI measurement, wideband PMI measurement, and broadband CQI measurement. Preferably, the first measurement frequency band may be used for RI measurement and/or wideband PMI measurement, but the embodiment of the present invention is not limited thereto.

[0061] The second measurement frequency band is used to perform sub-band CSI measurement, where the sub-band CSI measurement may include at least one of the following measurements: sub-band PM I measurement and sub-band CQ I measurement. Optionally, the second measurement frequency band may include at least two subbands, and the second measurement frequency band may be a downlink system bandwidth or a part of a downlink system bandwidth, but the embodiment of the present invention is not limited thereto.

[0062] The first measurement frequency band is a reference resource of wideband CSI in the frequency domain, and each subband in the second measurement frequency band is a reference resource of the CSI corresponding to the subband in the frequency domain.

[0063] S120. Perform wideband CSI measurement on the first measurement frequency band.

[0064] Performing broadband PMI measurement on the first measurement frequency band may mean that the first device selects the broadband PMI from the codebook when the downlink transmission is assumed to be on the first measurement frequency band, and the foregoing selection may include the first device according to Selection of the channel measured on the first measurement frequency band; performing broadband CQ I measurement on the first measurement frequency band may mean that the first device calculates the broadband CQI when the downlink transmission is assumed to be on the first measurement frequency band; Performing RI measurement on the first measurement frequency band may mean that the first device obtains RI or obtains RI and PMI when downlink transmission is assumed to be on the first measurement frequency band, but the embodiment of the present invention is not limited thereto.

[0065] Optionally, the wideband CSI measurement performed by the UE may be instantaneous measurement, for example, the measurement is performed on one subframe, or the UE performs wideband CSI measurement on multiple subframes and performs measurement results on the multiple subframes. Perform statistical processing, but the embodiment of the present invention is not limited to this.

[0066] S130, according to the measurement result obtained by the wideband CSI measurement, perform subband CSI measurement on the second measurement frequency band.

[0067] Wherein, the second measurement frequency band may include multiple subbands. Accordingly, the first device performing subband CSI measurement on the second measurement frequency band may include the subband CSI measurement performed by the first device in the second measurement frequency band. The sub-band CSI measurement is performed on at least one of the multiple sub-bands. The first device may perform sub-band CS I measurement on the second measurement frequency band based on the measurement results of RI measurement and/or broadband PMI measurement; or may perform sub-band CQI measurement on the second measurement frequency band based on the measurement results of wideband CQ I measurement. The subband CSI measurement is performed, but the embodiment of the present invention is not limited to this.

[0068] Optionally, the subband CSI measurement performed by the UE may be instantaneous measurement, for example, subband CSI measurement performed on one subframe, but the embodiment of the present invention is not limited thereto.

[0069] Therefore, according to the method for measuring CSI according to the embodiment of the present invention, the first device performs broadband CSI measurement on the first measurement frequency band whose bandwidth is less than the downlink transmission bandwidth, and performs wideband CSI measurement on the first measurement frequency band that does not completely overlap with the first measurement frequency band. Performing subband CSI measurement on the second measurement frequency band can obtain the measurement results of broadband CSI and subband CSI, and further report the measurement results to the network side device, so that the network side device can be based on the measurement reported by the first device As a result, the first device is scheduled, so compared to the scheduling scheme that the base station cannot obtain the CSI measurement result reported by the UE, the scheduling efficiency of the network side device can be improved, and the system performance and user experience can be improved.

[0070] When the present invention is applied to a frequency domain dynamic interference control scenario, for example, the system uses dynamic node static control in the frequency domain.

In the prior art, the first device performs wide-band CSI and sub-band CSI measurements on the entire downlink system bandwidth. However, due to the wideband CSI and sub-band CSI measurements on the entire downlink system bandwidth, The interference received on different frequency bands is different. The wideband CSI measurement on the entire downlink system bandwidth will cause the wideband CSI to be inaccurate, and the inaccurate measurement results of the wideband CSI will further cause the subband CSI measurement results to be inaccurate, thereby reducing the base station The efficiency of scheduling based on the CSI measurement results reported by the UE reduces system performance and user experience. In the embodiment of the present invention, optionally, the interference on the first measurement frequency band where the first device performs wideband CSI measurement is stable, that is, the first measurement frequency band may be a frequency band with relatively stable interference. Specifically, the first measurement The interference fluctuation on the frequency band can be lower than a certain threshold, and the threshold can be pre-defined or pre-configured by the network side equipment. For example, the first measurement frequency band is a frequency band without frequency domain dynamic interference control; or the first measurement frequency band is mainly The transmission mode adopted by the interfering cell does not change or the change in the transmission mode meets a preset condition. Optionally, the preset condition may include the transmission mode changing between different elements in the preset transmission mode set, etc.; or The first measurement frequency band is a frequency band in which the transmission mode adopted by the main interference cell does not change, where the transmission mode may include unicast or multicast, etc. The embodiment of the present invention is not limited to this; and the second measurement frequency band may be To include frequency bands where interference is unstable, that is, frequency bands where interference changes dynamically. In this way, compared with the prior art, the accuracy of the broadband CSI measurement result obtained by the first device is higher. In addition, the first measurement frequency band does not completely overlap with the second measurement frequency band of the subband CSI measurement performed by the first device. This enables the subband CSI measurement result of the first device to include more frequency band information, thereby improving the accuracy of the CSI measurement result of the first device while maintaining the comprehensiveness of the measurement result, and improving the network-side devices basis The efficiency of scheduling the CSI measurement results reported by the first device improves system performance and user experience.

[0071] In the embodiment of the present invention, the first measurement frequency band is a part of the downlink system bandwidth, the second measurement frequency band may be a downlink system bandwidth or a part of the downlink system bandwidth, and the first measurement frequency band and the second measurement frequency band are The frequency bands do not overlap completely. Optionally, the bandwidth of the first measurement frequency band may be smaller than the bandwidth of the second measurement frequency band. In this way, the measurement result of the subband CSI measurement performed by the first device on the second measurement frequency band may include more Information on multiple frequency bands helps the network side device to schedule according to the CSI measurement result of the first device. For example, assuming that the downlink system bandwidth is 10 MHz, the bandwidth of the first measurement frequency band of the first device may be 5 MHz. The bandwidth of the second measurement frequency band may be 7 MHz; or the downlink system bandwidth may be divided into 8 subbands, then the first measurement frequency band may include 2 subbands, and the second measurement frequency band may include 5 subbands; or the downlink system bandwidth may include 50 If there are two physical resource blocks (PRBs), the first measurement frequency band may include 10 PRBs, and the second measurement frequency band may include 20 PRBs, but the embodiment of the present invention is not limited thereto.

[0072] Optionally, the incomplete overlap of the first measurement frequency band and the second measurement frequency band includes:

[0073] The first measurement frequency band and the second measurement frequency band do not overlap at all; or

[0074] Part of the frequency band in the first measurement frequency band overlaps with part of the frequency band in the second measurement frequency band; or

[0075] The first measurement frequency band is a part of the second measurement frequency band.

[0076] Wherein, the first measurement frequency band may not overlap with the second measurement frequency band at all, that is, the first measurement frequency band and the second measurement frequency band have no intersection in the frequency domain; part of the frequency band in the first measurement frequency band is also May overlap with part of the second measurement frequency band, that is, the first measurement frequency band and the second measurement frequency band have an intersection in the frequency domain, and the intersection is a subset of the first measurement frequency band and the second measurement frequency band; Optionally, the first measurement frequency band may also be a subset of the second measurement frequency band. Preferably, the first measurement frequency band may be a frequency band with relatively stable interference, and the second measurement frequency band may also include a frequency band with relatively stable interference. The frequency band and the frequency band where interference changes dynamically, the embodiment of the present invention is not limited thereto.

[0077] The first device may determine the first measurement frequency band and the second measurement frequency band in a variety of ways. Optionally,

At least one of the first measurement frequency band and the second measurement frequency band may be predefined; the first device may also determine the first measurement frequency band and/or the second measurement frequency by blindly detecting interference stability For example, the first device uses a frequency band with relatively stable interference as the first measurement frequency band, and uses the entire downlink system bandwidth as the second measurement frequency band; at least one of the first measurement frequency band and the second measurement frequency band may also be used It is determined according to the instruction information of the network side device, where the instruction information is used to indicate the measurement frequency band used when the first device performs CSI measurement, but the embodiment of the present invention is not limited to this.

[0078] Optionally, S110, determining the first measurement frequency band and the second measurement frequency band includes:

[0079] S110a: Determine at least one of the first measurement frequency band and the second measurement frequency band according to the CSI measurement frequency band indication information sent by the network side device.

[0080] Wherein, the CSI measurement frequency band indication information is used to indicate the first measurement frequency band and/or the second measurement frequency band, and the network side device may be a base station, but the embodiment of the present invention is not limited thereto. The first device may receive the CSI measurement frequency band indication information sent by the network side device, and determine the first measurement frequency band and/or the second measurement frequency band according to the CSI measurement frequency band indication information. Optionally, the CSI measurement frequency band indication information may be used to indicate the first CSI measurement frequency band, and the second CSI measurement frequency band is predefined; or the CSI measurement frequency band indication information may be used to indicate the second CSI measurement frequency band, and the The first CSI measurement frequency band is predefined; the CSI measurement frequency band indication information may also be used to indicate the first measurement frequency band and the second CSI measurement frequency band. Accordingly, the first device determines the first measurement frequency band according to the CSI measurement frequency band indication information. The measurement frequency band and the second measurement frequency band, but the embodiment of the present invention is not limited thereto.

[0081] Optionally, the CSI measurement frequency band indication information may explicitly or implicitly indicate the first measurement frequency band and/or the second measurement frequency band, and the CSI measurement frequency band indication information indicates that the first measurement frequency band is For example, the CSI measurement frequency band indication information can explicitly indicate the first measurement frequency band, or it can indicate the first measurement frequency band by indicating the complement of the first measurement frequency band on the downlink system bandwidth; the CSI measurement frequency band indication The information can also implicitly indicate the first measurement frequency band by indicating the first adjustment frequency band, where the first adjustment frequency band is used to indicate the frequency band value for adjusting a certain reference frequency band, that is, the first measurement frequency band is based on the The frequency band obtained after the first adjustment frequency band adjusts the reference frequency band. Optionally, the reference frequency band may be predefined, or may be the measurement frequency band used when the first device performed broadband CS I measurements last or N times The embodiment of the present invention is not limited to this.

[0082] Optionally, if the first device receives the CSI measurement frequency band indication information sent by the network side device, the CSI measurement frequency band indication information includes at least one of the following information: first adjustment frequency band information and second adjustment Frequency band information, [0083] Correspondingly, S110a, determining at least one of the first measurement frequency band and the second measurement frequency band according to the CS I measurement frequency band indication information sent by the network side device includes:

[0084] S111, determining that the first measurement frequency band is the frequency band obtained after adjusting the measurement frequency band used for the last wideband CSI measurement according to the frequency band bandwidth corresponding to the first adjustment frequency band information; and/or

[0085] S112: Determine that the second measurement frequency band is a frequency band obtained after adjusting the measurement frequency band used for the last subband CSI measurement according to the frequency bandwidth corresponding to the second adjustment frequency band information.

[0086] Wherein, the first adjustment frequency band information is used to indicate how to adjust the first device on the basis of the measurement frequency band used in the last wideband CSI measurement to obtain the first measurement frequency band. Optionally, the first frequency band adjustment information may include the first frequency band adjustment value. Accordingly, the first device may add the bandwidth of the measurement frequency band used in the last RI measurement to the first frequency band adjustment value as The bandwidth of the first measurement frequency band for this wideband CSI measurement. The first frequency band adjustment value may be a positive or negative number, corresponding to the increase or decrease of the bandwidth of the measurement frequency band used by the first device during the last RI measurement. Reduce the number of measurement frequency bands, but the embodiment of the present invention is not limited to this; optionally, the network

The side device and the first device may also pre-appoint the adjustment step size of the measurement frequency band of the wideband CSI measurement, where the adjustment step size may be a fixed value or may depend on the downlink system bandwidth, for example, if the downlink system bandwidth is 10MHz , The adjustment step size is 1 MHz, and if the downlink system bandwidth is 20 MHz, the adjustment step size is 2 MHz. Optionally, the adjustment step size can also be the size of one subband, but the embodiment of the present invention is not limited to this Correspondingly, the first adjustment frequency band information may include a multiple of the adjustment step size of the frequency band, and the first device uses the product of the multiple and the step size as the first frequency band adjustment value. Optionally, as another embodiment, there may also be multiple pre-defined or network-side device-indicated adjustment steps, and the first adjustment frequency band information may also indicate the adjustment step used this time, but the embodiment of the present invention There is no restriction on this.

[0087] After the first device determines the bandwidth of the first measurement frequency band, the measurement frequency band used in the last wideband CSI measurement can be adjusted in a variety of ways to determine the first measurement frequency band, where the adjustment The method can be pre-defined or instructed by the network side device. Optionally, the first device can fix one end of the measurement frequency band used last time and adjust only the other end, or adjust the measurement frequency band used last time. Both ends of the frequency band are adjusted. For example, the measurement frequency band used by the first device to perform broadband CS I measurement last time is 5 MHz, and the first frequency band adjustment value is 2 MHz, then the first device can perform the last measurement The minimum frequency of wideband CSI measurement remains unchanged, and the maximum frequency is increased by 2MHz; or the maximum frequency of the last wideband CSI measurement is kept unchanged, and the minimum frequency is decreased by 2MHz; or the last wideband CSI measurement is performed The minimum frequency of is reduced by 1 MHz and the maximum frequency is increased by 1 MHz, but the embodiment of the present invention is not limited to this.

[0088] Similarly, the second adjustment frequency band information is used to instruct the first device how to adjust on the basis of the measurement frequency band used in the last subband CSI measurement to obtain the second measurement frequency band. For the realization of the second adjustment frequency band information, please refer to the above description of the first adjustment frequency band information. For the sake of brevity, it will not be repeated here.

[0089] Optionally, as another embodiment, the first device may also have at least two first candidate measurement frequency bands, and the network side device may instruct the first device to use the at least two first candidate measurement frequency bands One of the first candidate measurement frequency bands in is used as the first measurement frequency band; similarly, the first device may also have at least two second candidate measurement frequency bands, and the network-side device may instruct the first device to use at least two candidate measurement frequency bands. A certain second candidate measurement frequency band in the second candidate measurement frequency band is used as the second measurement frequency band. Correspondingly, in S110a, according to the CS I measurement frequency band indication information sent by the network side device, determine whether the first measurement frequency band and the second measurement frequency band are At least one of, including:

[0090] S113, according to the CS I measurement frequency band indication information sent by the network side device, determine the first measurement frequency band from at least two first candidate measurement frequency bands; and/or

[0091] S114, according to the CSI measurement frequency band indication information sent by the network side device, determine the second measurement frequency band from at least two second candidate measurement frequency bands.

[0092] Wherein, the at least two first candidate measurement frequency bands and/or the at least two second candidate measurement frequency bands may be predefined, or the network side device may be configured in advance through high-level signaling. This is the case in the embodiment of the present invention. Not limited.

[0093] Optionally, the CSI measurement frequency band indication information may be physical layer signaling or high-layer signaling, for example, Downlink Control Information (DCI) or Radio Resource Control (Radio Resource Control, RRC), where: The first measurement frequency band and/or the second measurement frequency band can be indicated by adding or multiplexing at least one bit in the DCI (for example, adding 1 to 2 bits), and the RRC can be a newly added bit Signal or reuse existing signaling. Any one of the first measurement frequency band and the second measurement frequency band can be dynamically configured or semi-statically configured by the network side device. Accordingly, the CSI measurement frequency band indication information is semi-static signaling or dynamic signaling, but The embodiment of the present invention is not limited to this.

[0094] Optionally, as another embodiment, if the first device is configured with at least two CSI processes, each of the at least two CSI processes may correspond to one first measurement frequency band and one CSI process. The second measurement frequency band, where the

All CSI processes in the at least two CSI processes may correspond to the same first measurement frequency band and/or the same second measurement frequency band, or the first measurement frequency band and/or the first measurement frequency band of each CSI process in the at least two CSI processes The two measurement frequency bands may be independent of each other, that is, the first measurement frequency band and/or the second measurement frequency band of each CSI process of the at least two CSI processes may be different from each other, or some of the CSI processes of the at least two CSI processes The first measurement frequency band and/or the second measurement frequency band are the same. Accordingly, if the UE is configured with at least one CSI process, the at least one CSI process corresponds to the same first measurement frequency band and the same second measurement frequency band; or

[0095] If the UE is configured with at least one CSI process, the at least one CSI process corresponds to the same first measurement frequency band, and the first CSI process and the second CSI process in the at least one CSI process correspond to different second Measurement frequency band; or

[0096] If the UE is configured with at least one CSI process, the at least one CSI process corresponds to the same second measurement frequency band, and the first CSI process and the second CSI process in the at least one CSI process correspond to different first Measurement frequency band.

[0097] Optionally, the network-side device may configure the first measurement frequency band and/or the second measurement frequency band for all CSI processes in the at least two CSI processes through independent configuration signaling, or may further be Each of the at least two CSI processes independently configures the first measurement frequency band and/or the second measurement frequency band, and the embodiment of the present invention is not limited thereto.

[0098] Optionally, as another embodiment, if the first device is configured with at least two subframe sets, each subframe set in the at least two subframe sets may correspond to one first measurement frequency band and one The second measurement frequency band, wherein all subframe sets in the at least two subframe sets may correspond to the same first measurement frequency band and/or the same second measurement frequency band, or each subframe set in the at least two subframe sets The first measurement frequency band and/or the second measurement frequency band may be independent of each other, that is, the first measurement frequency band and/or the second measurement frequency band of each subframe set in the at least two subframe sets may be different from each other, or the at least two subframe sets may be different from each other. The first measurement frequency band and/or the second measurement frequency band of some subframe sets in the subframe sets are the same, and accordingly,

[0099] If the UE is configured with at least two subframe sets, the at least two subframe sets correspond to the same first measurement frequency band and the same second measurement frequency band; or

[0100] If the UE is configured with at least two subframe sets, the at least two subframe sets correspond to the same first measurement frequency band and the first subframe set and the second subframe set in the at least two subframe sets correspond to different [0101] If the UE is configured with at least two subframe sets, the at least two subframe sets correspond to the same second measurement frequency band and the first subframe set in the at least two subframe sets and The second set of subframes corresponds to a different first measurement frequency band.

[0102] Optionally, the first device may actively perform broadband CSI measurement and subband CSI measurement, and send the measurement results to the network side device. Accordingly, the method 100 further includes: reporting the broadband CSI to the network side device The measurement result of the measurement and the measurement result of the sub-band CSI measurement; optionally, as another embodiment, the first device may also perform the broadband CSI measurement and the sub-band CSI measurement according to the instructions of the network side device, and compare the measurement results Reporting to the network side device, correspondingly, before S120, the method 100 further includes:

[0103] S140. Receive CSI report indication information sent by a network side device, where the CSI report indication information is used to instruct the first device to report broadband CSI and subband CSI to the network side device;

[0104] S120. Performing broadband CS I measurement on the first measurement frequency band includes:

[0105] S121: Perform broadband CSI measurement on the first measurement frequency band according to the CSI report indication information.

[0106] Wherein, the combination of the first device and the network side device may be a UE and a base station, a first base station and a second base station, or a first UE and a second UE, but the embodiment of the present invention is not limited thereto.

[0107] Therefore, according to the method for measuring CSI according to the embodiment of the present invention, the first device performs wideband CSI measurement on the first measurement frequency band whose bandwidth is smaller than the downlink transmission bandwidth, and performs wideband CSI measurement on the first measurement frequency band that does not completely overlap with the first measurement frequency band. Second measurement frequency band

Performing sub-band CSI measurement on the above, can obtain the measurement results of wideband CSI and sub-band CSI, and can further report the measurement results to the network side device, so that the network side device can perform the first device according to the measurement result reported by the first device. One device performs scheduling, so that compared to the scheduling scheme in which the base station cannot obtain the CSI measurement results reported by the UE, the scheduling efficiency of the network side device can be improved, and the system performance and user experience can be improved. Further, in a frequency domain dynamic interference control scenario, the first measurement frequency band may be a frequency band with relatively stable interference. In this way, the accuracy of the CSI measurement result obtained by the first device is higher. In addition, the first measurement frequency band is more accurate than the The second measurement frequency bands of the subband CSI measurement performed by the first device do not completely overlap, so that the subband CSI measurement result of the first device can include more frequency band information, thereby improving the accuracy of the CSI measurement result of the first device. While maintaining the comprehensiveness of the measurement results, the efficiency of scheduling by the network-side device based on the CSI measurement results reported by the first device is improved, and the system performance and user experience are improved; and the network-side device can know the interference on each frequency band Therefore, it is known which subband CSI measurement results reported by the UE can provide accurate information for scheduling, and the above-mentioned beneficial effects are more prominent when the first device supports only one CSI process.

[0108] The method for measuring CSI according to an embodiment of the present invention is described in detail above with reference to FIG. 1 from the perspective of the first device. The following will describe in detail the embodiment of the present invention from the perspective of a network side device in conjunction with FIG. The method used to measure CSI.

[0109] FIG. 2 shows a schematic flowchart of a method 200 for measuring CSI according to an embodiment of the present invention. The method may be executed by a network-side device. Optionally, the network-side device may be a base station. As shown in FIG. 2, the method 200 includes: [0110] S210, the network side device determines a CSI measurement frequency band used when the first device performs CSI measurement, and the CSI measurement frequency band includes at least one of the following frequency bands: A first measurement frequency band for CSI measurement and a second measurement frequency band for sub-band CSI measurement, wherein the bandwidth of the first measurement frequency band is smaller than the downlink transmission bandwidth and the first measurement frequency band does not completely overlap the second measurement frequency band;

[0111] S220. Send CSI measurement frequency band indication information to the first device, where the CSI measurement frequency band indication information is used to indicate the CSI measurement frequency band.

[0112] Therefore, according to the method for measuring CSI according to the embodiment of the present invention, the first device performs wideband CSI measurement on the first measurement frequency band whose bandwidth is less than the downlink transmission bandwidth, and performs wideband CSI measurement on the first measurement frequency band that does not completely overlap with the first measurement frequency band. Performing subband CSI measurement on the second measurement frequency band can obtain the measurement results of broadband CSI and subband CSI, and further report the measurement results to the network side device, so that the network side device can be based on the measurement reported by the first device As a result, the first device is scheduled, so that compared with the scheduling scheme in which the base station cannot obtain the CSI measurement results reported by the UE, the scheduling efficiency of the network side device can be improved, and the system performance and user experience can be improved.

[0113] In the embodiment of the present invention, the CSI measurement frequency band includes the first measurement frequency band and/or the second measurement frequency band, and the network side device indicates the CSI measurement frequency band to the first device through the CSI measurement frequency band indication information, that is, indicates The first measurement frequency band and/or the second measurement frequency band. Wherein, the network side device may explicitly indicate the CSI measurement frequency band, or may implicitly indicate the CSI measurement frequency band, but the embodiment of the present invention does not limit this.

[0114] When the present invention is applied to a frequency domain dynamic interference control scenario, for example, the system adopts technologies such as dynamic node muting, dynamic power control, or dynamic interference coordination (such as interference direction coordination) in the frequency domain. In the prior art, The first device performs wideband CSI and subband CSI measurements on the entire downlink system bandwidth. However, due to the different interferences received on different frequency bands of the entire downlink system bandwidth, performing wideband CSI measurements on the entire downlink system bandwidth will cause wideband CSI failure. Accurate, and inaccurate measurement results of wideband CSI will further cause inaccurate measurement results of subband CSI, thereby reducing the efficiency of scheduling by the base station based on the CSI measurement results reported by the UE, and reducing system performance and user experience. In the embodiment of the present invention, optionally, the interference on the first measurement frequency band where the first device performs wideband CSI measurement is stable, that is, the first measurement frequency band can be

For the frequency band where the interference is relatively stable, specifically, the interference fluctuation on the first measurement frequency band may be lower than a certain threshold, and the threshold may be pre-defined or pre-configured by the network side device, which is not limited by the present invention; and the second The measurement frequency band may include a frequency band where the interference is unstable, that is, a frequency band where the interference changes dynamically. In this way, compared with the prior art, the accuracy of the broadband CSI measurement result obtained by the first device is higher. In addition, the first measurement frequency band does not completely overlap with the second measurement frequency band of the subband CSI measurement performed by the first device. It can make the subband CSI measurement result of the first device include more frequency band information, thereby improving the accuracy of the CSI measurement result of the first device while maintaining the comprehensiveness of the measurement result, and improving the network-side devices basis The efficiency of scheduling the CSI measurement results reported by the first device improves system performance and user experience.

[0115] Wherein, the wideband CS I measurement may include at least one of the following measurements: RI measurement, wideband CQI measurement, and wideband PMI measurement. Performing broadband PMI measurement on the first measurement frequency band may mean that the first device selects the broadband PMI from the codebook when the downlink transmission is assumed to be on the first measurement frequency band, and the above selection may include that the first device selects the broadband PMI according to the Selection of a channel measured on a measurement frequency band; performing a wideband CQI measurement on the first measurement frequency band may mean that the first device calculates a wideband CQI when the downlink transmission is assumed to be on the first measurement frequency band; Performing RI measurement on the measurement frequency band may mean that the first device obtains the PMI when the downlink transmission is assumed to be on the first measurement frequency band, but the embodiment of the present invention is not limited thereto.

[0116] The sub-band CS I measurement may include at least one of the following measurements: sub-band PMI measurement and sub-band CQ I measurement.

[0117] Optionally, as another embodiment, the first measurement frequency band does not completely overlap the second measurement frequency band, including: [0118] the first measurement frequency band does not completely overlap the second measurement frequency band; or

[0119] Part of the frequency band in the first measurement frequency band overlaps with part of the frequency band in the second measurement frequency band; or

[0120] The first measurement frequency band is a part of the second measurement frequency band.

[0121] Optionally, as another embodiment, the network-side device may configure at least two first candidate CSI measurement frequency bands for the first device through high-layer signaling in advance, or the first device may have at least two predefined CSI measurement frequency bands. The first candidate CSI measurement frequency band, the network side device may select a certain first candidate measurement frequency band from the at least two first candidate measurement frequency bands as the first measurement frequency band, and accordingly, S210, determine that the first device performs CSI measurement The CSI measurement frequency band used at the time includes: [0122] S211: Determine the first measurement frequency band used when the first device performs RI measurement from at least two first candidate CSI measurement frequency bands of the first device.

[0123] Optionally, as another embodiment, the network-side device may configure at least two second candidate CSI measurement frequency bands for the first device through high-layer signaling in advance, or the first device may have at least two predefined CSI measurement frequency bands. The second candidate CSI measurement frequency band, the network side device may select a certain second candidate measurement frequency band from the at least two second candidate measurement frequency bands as the second measurement frequency band, and accordingly, S110, determine that the first device performs CSI measurement The CSI measurement frequency band used at the time includes: [0124] S212: Determine, from the at least two second candidate CSI measurement frequency bands of the first device, the second measurement frequency band used when the first device performs sub-band CSI measurement.

[0125] Optionally, the network side device may implicitly indicate the CSI measurement frequency band by indicating the frequency band adjustment bandwidth of the CSI measurement frequency band to the first device. Specifically, the CSI measurement frequency band indication information includes the following information At least one of: first adjustment frequency band information and second adjustment frequency band information, wherein the first adjustment frequency band information is used to indicate that the first measurement frequency band is a frequency band bandwidth pair corresponding to the first device according to the first adjustment frequency band information The frequency band obtained after adjusting the measurement frequency band used in the last wideband CSI measurement, the second adjustment frequency band information is used to indicate that the second measurement frequency band is the frequency band bandwidth pair corresponding to the first device according to the second adjustment frequency band information The frequency band obtained after adjusting the measurement frequency band used in the last sub-band CSI measurement.

[0126] The CS I measurement band indication information may be physical layer signaling or high-layer signaling, for example, DC I or RRC signaling, where at least one bit may be added to the DC I (for example, adding 1~2 bits) to indicate the first measurement frequency band and/or the second measurement frequency band, and the RRC may be newly added signaling or multiplexed existing signaling. Any one of the first measurement frequency band and the second measurement frequency band can be dynamically configured or semi-statically configured by the network side device. Accordingly, the CSI measurement frequency band indication information is semi-static signaling or dynamic signaling, but The embodiment of the present invention is not limited to this.

[0127] Optionally, as another embodiment, if the UE is configured with at least one CSI process, the at least one CSI process corresponds to the same first measurement frequency band and the same second measurement frequency band; or

[0128] If the UE is configured with at least one CSI process, the at least one CSI process corresponds to the same first measurement frequency band, and the first CSI process and the second CSI process in the at least one CSI process correspond to different second Measurement frequency band; or

[0129] If the UE is configured with at least one CSI process, the at least one CSI process corresponds to the same second measurement frequency band, and the first CSI process and the second CSI process in the at least one CSI process correspond to different first Measurement frequency band.

[0130] Optionally, as another embodiment, if the UE is configured with at least two subframe sets, the at least two subframe sets correspond to the same first measurement frequency band and the same second measurement frequency band; or

[0131] If the UE is configured with at least two subframe sets, the at least two subframe sets correspond to the same first measurement frequency band and the first subframe set and the second subframe set in the at least two subframe sets correspond to different [0132] If the UE is configured with at least two subframe sets, the at least two subframe sets correspond to the same second measurement frequency band and the first subframe set in the at least two subframe sets and The second subframe set corresponds to a different first measurement frequency band. [0133] Optionally, as another embodiment, the method 200 further includes:

[0134] S230. Send CSI report indication information to the first device, where the CSI report indication information is used to instruct the first device to report CSI;

[0135] S240. Receive a measurement result of the CSI measurement performed by the first device according to the CSI report indication information and the CSI measurement frequency band indicator information.

[0136] Therefore, according to the method for measuring CSI according to the embodiment of the present invention, the first device performs wideband CSI measurement on the first measurement frequency band whose bandwidth is less than the downlink transmission bandwidth, and performs wideband CSI measurement on the first measurement frequency band that does not completely overlap with the first measurement frequency band. Performing subband CSI measurement on the second measurement frequency band can obtain the measurement results of broadband CSI and subband CSI, and further report the measurement results to the network side device, so that the network side device can be based on the measurement reported by the first device As a result, the first device is scheduled, so that compared with the scheduling scheme in which the base station cannot obtain the CSI measurement results reported by the UE, the scheduling efficiency of the network side device can be improved, and the system performance and user experience can be improved. Further, in a frequency domain dynamic interference control scenario, the first measurement frequency band may be a frequency band with relatively stable interference. In this way, the accuracy of the CSI measurement result obtained by the first device is higher. In addition, the first measurement frequency band is more accurate than the The second measurement frequency bands of the sub-band CSI measurement performed by the first device do not completely overlap, so that the sub-band CSI measurement result of the first device includes more frequency band information, thereby improving the accuracy of the CSI measurement result of the first device. While maintaining the comprehensiveness of the measurement results, the efficiency of scheduling by the network-side device based on the CSI measurement results reported by the first device is improved, and the system performance and user experience are improved; and the network-side device can Knowing the interference information on each frequency band, thereby knowing which subband CSI measurement results reported by the UE can provide accurate information for scheduling, and the above-mentioned beneficial effects are more prominent when the first device supports only one CSI process.

[0137] The method for measuring CS I provided by the embodiment of the present invention will be described in more detail below with reference to specific examples. Fig. 3 is a schematic diagram of system frequency band configuration according to an embodiment of the present invention. For the convenience of description, in this embodiment, it is assumed that there are macro nodes and micro nodes in the coverage area of the macro nodes in the system. The UE is served by the micro nodes but is interfered by the macro nodes. The macro nodes use dynamic node silence in the frequency domain. Reduce the interference to the UE served by the micro node. Assume that the first device is a UE, and

The network side device is a base station corresponding to the micro node. As shown in Figure 3, the base station configures the first measurement frequency band and the second measurement frequency band for the UE, and ensures that the first measurement frequency band is the frequency band where the macro node is silent, and the second measurement frequency band may include the frequency band where the macro node is silent. It also includes the non-silent frequency band of the macro node. At this time, the UE measures the wideband CSI on the first measurement frequency band, and performs sub-band CSI measurement according to the sub-bands included in the second measurement frequency band. Since the base station knows which frequency bands of the second measurement frequency band the macro node is muted on and which frequency bands are not muted in the measurement subframe of the UE, the base station also knows which of the sub-band CSI fed back by the UE is the sub-band of the macro node muting. With the corresponding CSI and the subband can be used for scheduling, but the embodiment of the present invention is not limited to this.

[0138] It should be noted that this example of FIG. 3 is to help those skilled in the art better understand the embodiments of the present invention, and is not intended to limit the scope of the embodiments of the present invention. Those skilled in the art can obviously make various equivalent modifications or changes based on the example of FIG. 3 given, and such modifications or changes also fall within the scope of the embodiments of the present invention.

[0139] It should be understood that the size of the sequence numbers of the foregoing processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present invention.

[0140] The method for measuring CSI according to an embodiment of the present invention is described in detail above with reference to FIGS. 1 to 3, and the method for measuring CSI according to an embodiment of the present invention will be described below with reference to FIGS. 4 to 7. Device.

[0141] FIG. 4 shows a schematic flowchart of an apparatus 300 for measuring channel state information CSI according to an embodiment of the present invention, where the apparatus 300 may correspond to the first device in the foregoing method embodiment, such as As shown in FIG. 4, the device 300 includes:

[0142] The determining module 310 is configured to determine a first measurement frequency band and a second measurement frequency band, where the first measurement frequency band is used for wideband CSI measurement, and the second measurement frequency band is used for subband CSI measurement. The bandwidth of the measurement frequency band is smaller than the downlink transmission bandwidth, and the first measurement frequency band and the second measurement frequency band do not completely overlap;

[0143] The first measurement module 320 is configured to perform broadband CSI measurement on the first measurement frequency band determined by the determination module 310;

[0144] The second measurement module 330 is configured to perform subband CSI measurement on the second measurement frequency band according to the measurement result obtained by the first measurement module 320 performing the wideband CSI measurement.

[0145] Therefore, according to the apparatus for measuring CSI according to the embodiment of the present invention, the first device performs wideband CSI measurement on the first measurement frequency band whose bandwidth is smaller than the downlink transmission bandwidth, and performs wideband CSI measurement on the first measurement frequency band that does not completely overlap with the first measurement frequency band. 2. Perform sub-band CSI measurement on the measurement frequency band to obtain broadband CSI and sub-band CSI measurement results, and further report the measurement results to the network side device, so that the network side device can be based on the measurement result reported by the first device Scheduling the first device so as to perform scheduling compared to the scheme in which the base station cannot obtain the CSI measurement results reported by the UE can improve the scheduling efficiency of the network-side device, and improve system performance and user experience.

[0146] Optionally, the wideband CSI measurement includes at least one of the following measurements: rank indicator RI measurement, wideband channel quality indicator CQI measurement, and wideband precoding indicator PMI measurement.

[0147] Optionally, as another embodiment, the incomplete overlap of the first measurement frequency band and the second measurement frequency band includes:

[0148] The first measurement frequency band and the second measurement frequency band do not overlap at all; or

[0149] Part of the frequency band in the first measurement frequency band overlaps with part of the frequency band in the second measurement frequency band; or

[0150] The first measurement frequency band is a part of the second measurement frequency band.

[0151] Optionally, as another embodiment, the determining module 310 is specifically configured to determine at least one of the first measurement frequency band and the second measurement frequency band according to the CSI measurement frequency band indication information sent by the network side device.

[0152] Optionally, as another embodiment, the determining module 310 includes:

[0153] The first determining unit 311 is configured to determine the first measurement frequency band from at least two first candidate measurement frequency bands according to the CSI measurement frequency band indication information sent by the network side device; and/or

[0154] The second determining unit 312 is configured to determine the second measurement frequency band from at least two second candidate measurement frequency bands according to the CSI measurement frequency band indication information sent by the network side device.

[0155] Optionally, as another embodiment, the CSI measurement frequency band indication information includes at least one of the following information: first adjustment frequency band information and second adjustment frequency band information. Accordingly, the determining module 310 includes:

[0156] The third determining unit 313 is configured to determine that the first measurement frequency band is the frequency band obtained after adjusting the measurement frequency band used for the last wideband CSI measurement according to the frequency band bandwidth corresponding to the first adjustment frequency band information; and / Or [0157] The fourth determining unit 314 is configured to determine that the second measurement frequency band is obtained after adjusting the measurement frequency band used in the last subband CSI measurement according to the frequency bandwidth corresponding to the second adjustment frequency band information frequency band.

[0158] Optionally, as another embodiment, the CSI measurement frequency band indication information is semi-static signaling or dynamic signaling.

[0159] Optionally, as another embodiment, if the UE is configured with at least one CSI process, the at least one CSI process corresponds to the same first measurement frequency band and the same second measurement frequency band; or

[0160] If the UE is configured with at least one CSI process, the at least one CSI process corresponds to the same first measurement frequency band, and the first CSI process and the second CSI process in the at least one CSI process correspond to different second Measurement frequency band; or

[0161] If the UE is configured with at least one CSI process, the at least one CSI process corresponds to the same second measurement frequency band, and the first CSI process and the second CSI process in the at least one CSI process correspond to different first Measurement frequency band.

[0162] Optionally, as another embodiment, if the UE is configured with at least two subframe sets, the at least two subframe sets correspond to the same first measurement frequency band and the same second measurement frequency band; or

[0163] If the UE is configured with at least two subframe sets, the at least two subframe sets correspond to the same first measurement frequency band, and the first subframe set and the second subframe set in the at least two subframe sets correspond to different [0164] If the UE is configured with at least two subframe sets, the at least two subframe sets correspond to the same second measurement frequency band and the first subframe set in the at least two subframe sets and The second subframe set corresponds to a different first measurement frequency band.

[0165] Optionally, as another embodiment, the apparatus 300 further includes:

[0166] The receiving module 340 is configured to receive CSI report indication information sent by the network side device before the first measurement module 320 performs broadband CSI measurement on the first measurement frequency band, where the CSI report indication information is used to indicate the second A device reports CSI to the network side device;

[0167] The first measurement module 320 is specifically configured to perform broadband CSI measurement on the first measurement frequency band according to the CSI report indication information received by the receiving module 340;

[0168] Correspondingly, the apparatus 300 further includes: a reporting module 350, configured to report to the network side device the measurement result of the broadband CSI measurement performed by the first measurement module 320 and the second measurement module 330 perform the subband measurement. Measurement result of CS I measurement.

[0169] The apparatus 300 for measuring CSI according to an embodiment of the present invention may correspond to the first device in the method for measuring CSI according to an embodiment of the present invention, and the foregoing description of each module in the apparatus 300 The other operations and/or functions are used to implement the corresponding procedures of the methods in FIG. 1, and are not repeated here for the sake of brevity.

[0170] Therefore, according to the apparatus for measuring CSI according to the embodiment of the present invention, the first device performs wideband CSI measurement on the first measurement frequency band whose bandwidth is less than the downlink transmission bandwidth, and performs wideband CSI measurement on the first measurement frequency band that does not completely overlap with the first measurement frequency band. 2. Perform sub-band CSI measurement on the measurement frequency band to obtain broadband CSI and sub-band CSI measurement results, and further report the measurement results to the network side device, so that the network side device can be based on the measurement result reported by the first device For the first set

Therefore, compared with the scheduling scheme in which the base station cannot obtain the CSI measurement results reported by the UE, the scheduling efficiency of the network side device can be improved, and the system performance and user experience can be improved. Further, in a frequency domain dynamic interference control scenario, the first measurement frequency band may be a frequency band with relatively stable interference. In this way, the accuracy of the CSI measurement result obtained by the first device is higher. In addition, the first measurement frequency band is more accurate than the The second measurement frequency bands of the subband CSI measurement performed by the first device do not completely overlap, so that the subband CSI measurement result of the first device can include more frequency band information, thereby improving the accuracy of the CSI measurement result of the first device. While maintaining the comprehensiveness of the measurement results, the efficiency of scheduling by the network-side device based on the CSI measurement results reported by the first device is improved, and the system performance and user experience are improved; and the network-side device can know the interference on each frequency band Therefore, it is known which subband CSI measurement results reported by the UE can provide accurate information for scheduling, and the above-mentioned beneficial effects are more prominent when the first device supports only one CSI process.

[0171] FIG. 5 shows a schematic block diagram of an apparatus 400 for measuring channel state information CSI according to another embodiment of the present invention. The apparatus 400 may be a network side device in the foregoing method embodiment, as shown in FIG. 5 As shown, the apparatus 400 includes: [0172] A determining module 410 is configured to determine a CSI measurement frequency band used when the first device performs CSI measurement, and the CSI measurement frequency band includes at least one of the following frequency bands: A first measurement frequency band and a second measurement frequency band for sub-band CSI measurement, wherein the bandwidth of the first measurement frequency band is smaller than the downlink transmission bandwidth and the first measurement frequency band and the second measurement frequency band do not completely overlap;

[0173] The sending module 420 is configured to send CSI measurement frequency band indication information to the first device, where the CSI measurement frequency band indication information is used to indicate the CSI measurement frequency band determined by the determining module 410.

[0174] Therefore, according to the apparatus for measuring CSI according to the embodiment of the present invention, the first device performs wideband CSI measurement on the first measurement frequency band whose bandwidth is less than the downlink transmission bandwidth, and performs wideband CSI measurement on the first measurement frequency band that does not completely overlap with the first measurement frequency band. 2. Perform subband CSI measurement on the measurement frequency band to obtain broadband CSI and subband CSI measurement results, and further report the measurement results to the network side device, so that the network side device can be based on the measurement result reported by the first device Scheduling the first device, so as to perform scheduling compared to the scheme in which the base station cannot obtain the CSI measurement results reported by the UE, can improve the scheduling efficiency of the network-side device, and improve system performance and user experience.

[0175] Optionally, the wideband CSI measurement includes at least one of the following measurements: rank indicator RI measurement, wideband channel quality indicator CQI measurement, and wideband precoding indicator PMI measurement.

[0176] Optionally, as another embodiment, the incomplete overlap of the first measurement frequency band and the second measurement frequency band includes:

[0177] The first measurement frequency band and the second measurement frequency band do not overlap at all; or

[0178] Part of the frequency band in the first measurement frequency band overlaps with part of the frequency band in the second measurement frequency band; or

[0179] The first measurement frequency band is a part of the second measurement frequency band.

[0180] Optionally, as another embodiment, the determining module 410 is specifically configured to:

[0181] Determine the first measurement frequency band used when the first device performs RI measurement from at least two first candidate CSI measurement frequency bands of the first device; and/or

[0182] Determine the second measurement frequency band used by the first device to perform subband CSI measurement from at least two second candidate CSI measurement frequency bands of the first device.

[0183] Optionally, as another embodiment, the CSI measurement frequency band indication information includes at least one of the following information: first adjustment frequency band information and second adjustment frequency band information, where:

[0184] The first adjustment frequency band information is used to indicate that the first measurement frequency band is obtained by the first device after adjusting the measurement frequency band used for the last wideband CSI measurement according to the frequency band bandwidth corresponding to the first adjustment frequency band information Frequency band,

[0185] The second adjustment frequency band information is used to indicate that the second measurement frequency band is the result of the first device adjusting the measurement frequency band used for the last subband CSI measurement according to the frequency band bandwidth corresponding to the second adjustment frequency band information. Obtained frequency band.

[0186] Optionally, as another embodiment, the CSI measurement frequency band indication information is semi-static signaling or dynamic signaling.

[0187] Optionally, as another embodiment, if the UE is configured with at least one CSI process, the at least one CSI process corresponds to the same first measurement frequency band and the same second measurement frequency band; or

[0188] If the UE is configured with at least one CSI process, the at least one CSI process corresponds to the same first measurement frequency band, and the first CSI process and the second CSI process in the at least one CSI process correspond to different second Measurement frequency band; or

[0189] If the UE is configured with at least one CSI process, the at least one CSI process corresponds to the same second measurement frequency band, and the first CSI process and the second CSI process in the at least one CSI process correspond to different first Measurement frequency band.

[0190] Optionally, as another embodiment, if the UE is configured with at least two subframe sets, the at least two subframe sets correspond to the same first measurement frequency band and the same second measurement frequency band; or

[0191] If the UE is configured with at least two subframe sets, the at least two subframe sets correspond to the same first measurement frequency band, and the first subframe set and the second subframe set in the at least two subframe sets correspond to different [0192] If the UE is configured with at least two subframe sets, the at least two subframe sets correspond to the same second measurement frequency band, and the first subframe set in the at least two subframe sets and The second subframe set corresponds to a different first measurement frequency band.

[0193] Optionally, as another embodiment, the sending module 420 is further configured to send CSI report indication information to the first device, where the CSI report indication information is used to instruct the first device to report CSI;

[0194] Correspondingly, the apparatus 400 further includes: a receiving module 430, configured to receive the measurement result of the CSI measurement performed by the first device according to the CSI report indication information sent by the sending module 420 and the CSI measurement band indicator information.

[0195] The apparatus 400 for measuring CSI according to an embodiment of the present invention may correspond to a network side device in the method for measuring CSI according to an embodiment of the present invention, and the above-mentioned sum of each module in the apparatus 400 Other operations and/or functions are used to implement the corresponding procedures of each method in FIG. 2, and are not repeated here for brevity.

[0196] Therefore, according to the apparatus for measuring CSI according to the embodiment of the present invention, the first device performs wideband CSI measurement on the first measurement frequency band whose bandwidth is smaller than the downlink transmission bandwidth, and performs wideband CSI measurement on the first measurement frequency band that does not completely overlap with the first measurement frequency band. 2. Perform subband CSI measurement on the measurement frequency band to obtain broadband CSI and subband CSI measurement results, and further report the measurement results to the network side device, so that the network side device can be based on the measurement result reported by the first device Scheduling the first device, so as to perform scheduling compared to the scheme in which the base station cannot obtain the CSI measurement results reported by the UE, can improve the scheduling efficiency of the network-side device, and improve system performance and user experience. Further, in a frequency domain dynamic interference control scenario, the first measurement frequency band may be a frequency band with relatively stable interference. In this way, the accuracy of the CSI measurement result obtained by the first device is higher. In addition, the first measurement frequency band is more accurate than the The second measurement frequency bands of the subband CSI measurement performed by the first device do not completely overlap, so that the subband CSI measurement result of the first device can include more frequency band information, thereby improving the accuracy of the CSI measurement result of the first device. While maintaining the comprehensiveness of the measurement results, the efficiency of scheduling by the network-side device based on the CSI measurement results reported by the first device is improved, and the system performance and user experience are improved; and the network-side device can Knowing the interference information on each frequency band, thereby knowing which subband CSI measurement results reported by the UE can provide accurate information for scheduling, and the above-mentioned beneficial effects are more prominent when the first device supports only one CSI process.

[0197] FIG. 6 shows a schematic flowchart of an apparatus 500 for measuring channel state information CSI according to an embodiment of the present invention, where the apparatus 500 may correspond to the first device in the foregoing method embodiment, such as As shown in FIG. 6, the device 500 includes a processor 510, a memory 520, and a bus system 530. Among them, the processor 510 and the memory 520 pass through the bus system 530

Connected, the memory 520 is used to store instructions, the processor 510 calls the instructions stored in the memory 520 through the bus system 530, specifically, the processor 510 is used to determine the first measurement frequency band and the second measurement frequency band, The first measurement frequency band is used for wideband CSI measurement, and the second measurement frequency band is used for subband CSI measurement, wherein the bandwidth of the first measurement frequency band is smaller than the downlink transmission bandwidth and the first measurement frequency band and the second measurement frequency band Incomplete overlap; performing wideband CSI measurement on the first measurement frequency band; and performing subband CSI measurement on the second measurement frequency band according to the measurement result obtained by the wideband CSI measurement.

[0198] Therefore, according to the apparatus for measuring CSI according to the embodiment of the present invention, the first device performs wideband CSI measurement on the first measurement frequency band whose bandwidth is smaller than the downlink transmission bandwidth, and performs wideband CSI measurement on the first measurement frequency band that does not completely overlap with the first measurement frequency band. 2. Perform sub-band CSI measurement on the measurement frequency band to obtain broadband CSI and sub-band CSI measurement results, and further report the measurement results to the network side device, so that the network side device can be based on the measurement result reported by the first device Scheduling the first device, so as to perform scheduling compared to the scheme in which the base station cannot obtain the CSI measurement results reported by the UE, can improve the scheduling efficiency of the network-side device, and improve system performance and user experience.

[0199] It should be understood that in this embodiment of the present invention, the processor 510 may be a central processing unit (Central Processing Unit, referred to as "CPU"), and the processor 510 may also be other general-purpose processors or digital signal processors. (DSP), application specific integrated circuit (ASIC), off-the-shelf programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.

[0200] The memory 520 may include a read-only memory and a random access memory, and provides instructions and data to the processor 510. A part of the memory 520 may also include a non-volatile random access memory. For example, the memory 520 may also store device type information.

[0201] In addition to the data bus, the bus system 530 may also include a power bus, a control bus, and a status signal bus. However, for clear description, various buses are marked as the bus system 530 in the figure.

[0202] In the implementation process, the steps of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 510 or instructions in the form of software. The steps of the method disclosed in the embodiments of the present invention may be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor. The software module can be located in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers. The storage medium is located in the memory 520, and the processor 510 reads the information in the memory 520, and completes the steps of the foregoing method in combination with its hardware. To avoid repetition, it will not be described in detail here.

[0203] Optionally, the wideband CSI measurement includes at least one of the following measurements: rank indicator RI measurement, wideband channel quality indicator CQI measurement, and wideband precoding indicator PMI measurement.

[0204] Optionally, as another embodiment, the first measurement frequency band does not completely overlap the second measurement frequency band, including: [0205] the first measurement frequency band does not completely overlap the second measurement frequency band; or

[0206] Part of the frequency band in the first measurement frequency band overlaps with part of the frequency band in the second measurement frequency band; or

[0207] The first measurement frequency band is a part of the second measurement frequency band.

[0208] Optionally, as another embodiment, the processor 510 is specifically configured to determine at least one of the first measurement frequency band and the second measurement frequency band according to the CSI measurement frequency band indication information sent by the network side device.

[0209] Optionally, as another embodiment, the processor 510 is specifically configured to:

[0210] According to the CSI measurement frequency band indication information sent by the network side device, determine the first measurement frequency band from at least two first candidate measurement frequency bands; and/or

[0211] According to the CSI measurement frequency band indication information sent by the network side device, the second measurement frequency band is determined from at least two second candidate measurement frequency bands.

[0212] Optionally, as another embodiment, the CSI measurement frequency band indication information includes at least one of the following information: first adjustment frequency band information and second adjustment frequency band information. Accordingly, the processor 510 is specifically configured to :

[0213] Determine that the first measurement frequency band is the frequency band obtained after adjusting the measurement frequency band used for the last wideband CSI measurement according to the frequency band bandwidth corresponding to the first adjustment frequency band information; and/or

[0214] It is determined that the second measurement frequency band is a frequency band obtained after adjusting the measurement frequency band used for the last subband CSI measurement according to the frequency bandwidth corresponding to the second adjustment frequency band information.

[0215] Optionally, as another embodiment, the CSI measurement frequency band indication information is semi-static signaling or dynamic signaling.

[0216] Optionally, as another embodiment, if the UE is configured with at least one CSI process, the at least one CSI process corresponds to the same first measurement frequency band and the same second measurement frequency band; or

[0217] If the UE is configured with at least one CSI process, the at least one CSI process corresponds to the same first measurement frequency band, and the first CSI process and the second CSI process in the at least one CSI process correspond to different second Measurement frequency band; or

[0218] If the UE is configured with at least one CSI process, the at least one CSI process corresponds to the same second measurement frequency band, and the first CSI process and the second CSI process in the at least one CSI process correspond to different first Measurement frequency band.

[0219] Optionally, as another embodiment, if the UE is configured with at least two subframe sets, the at least two subframe sets correspond to the same first measurement frequency band and the same second measurement frequency band; or

[0220] If the UE is configured with at least two subframe sets, the at least two subframe sets correspond to the same first measurement frequency band, and the first subframe set and the second subframe set in the at least two subframe sets correspond to different [0221] If the UE is configured with at least two subframe sets, the at least two subframe sets correspond to the same second measurement frequency band, and the first subframe set in the at least two subframe sets and The second set of subframes corresponds to a different first measurement frequency band. [0222] Optionally, as another embodiment, the apparatus 500 further includes:

[0223] The receiver 540 is configured to receive CSI report indication information sent by the network side device before the processor 510 performs broadband CSI measurement on the first measurement frequency band, where the CSI report indication information is used to instruct the first device Report CSI to the network side device;

[0224] Correspondingly, the processor 510 is specifically configured to perform broadband CSI measurement on the first measurement frequency band according to the CSI report indication information received by the receiver 540;

[0225] The apparatus 300 further includes a transmitter 550, configured to report to the network side device the measurement results of the wideband CSI measurement and the subband CSI measurement performed by the processor 510.

[0226] The apparatus 500 for measuring CSI according to an embodiment of the present invention may correspond to the first device in the method for measuring CSI according to an embodiment of the present invention, and the above-mentioned various modules in the apparatus 500 The other operations and/or functions are used to implement the corresponding process of each method in FIG. 1, and for the sake of brevity, they will not be repeated here.

[0227] Therefore, according to the apparatus for measuring CSI according to the embodiment of the present invention, the first device performs wideband CSI measurement on the first measurement frequency band whose bandwidth is smaller than the downlink transmission bandwidth, and performs wideband CSI measurement on the first measurement frequency band that does not completely overlap with the first measurement frequency band. 2. Perform sub-band CSI measurement on the measurement frequency band to obtain broadband CSI and sub-band CSI measurement results, and further report the measurement results to the network side device, so that the network side device can be based on the measurement result reported by the first device Scheduling the first device, so as to perform scheduling compared to the scheme in which the base station cannot obtain the CSI measurement results reported by the UE, can improve the scheduling efficiency of the network-side device, and improve system performance and user experience. Further, in a frequency domain dynamic interference control scenario, the first measurement frequency band may be a frequency band with relatively stable interference. In this way, the CSI measurement result obtained by the first device is

The accuracy is higher. In addition, the first measurement frequency band does not completely overlap with the second measurement frequency band of the subband CSI measurement performed by the first device, which enables the subband CSI measurement result of the first device to include more frequency band information, Thereby improving the accuracy of the CSI measurement result of the first device while maintaining the comprehensiveness of the measurement result, improving the efficiency of scheduling by the network side device according to the CSI measurement result reported by the first device, and improving system performance and user experience And the network side device can know the interference information on each frequency band, so as to know which subband CSI measurement results reported by the UE can provide accurate information for scheduling, and the above-mentioned beneficial effect is that the first device only supports one CSI process The situation is more prominent.

[0228] FIG. 7 shows a schematic block diagram of an apparatus 600 for measuring channel state information CSI according to another embodiment of the present invention. The apparatus 600 may be the network side device in the foregoing method embodiment, as shown in FIG. As shown, the device 600 includes a processor 610 , a memory 620, a bus system 630, and a transmitter 640. The processor 610, the memory 620, and the transmitter 640 are connected through a bus system 630. The memory 620 is used to store instructions. The processor 610 uses the bus system 630 to call the instructions stored in the memory 620. Specifically, the The processor 610 is configured to determine a CSI measurement frequency band used when the first device performs CSI measurement, and the CSI measurement frequency band includes at least one of the following frequency bands: a first measurement frequency band used for performing wideband CSI measurement and a subband used for performing wideband CSI measurement The second measurement frequency band for CSI measurement, wherein the bandwidth of the first measurement frequency band is smaller than the downlink transmission bandwidth and the first measurement frequency band does not completely overlap the second measurement frequency band; the transmitter 640 is used to send CS to the first device I measurement frequency band indication information, where the CSI measurement frequency band indication information is used to indicate the CSI measurement frequency band determined by the processor 610.

[0229] Therefore, according to the apparatus for measuring CSI according to the embodiment of the present invention, the first device performs wideband CSI measurement on the first measurement frequency band whose bandwidth is smaller than the downlink transmission bandwidth, and performs wideband CSI measurement on the first measurement frequency band that does not completely overlap with the first measurement frequency band. 2. Perform subband CSI measurement on the measurement frequency band to obtain broadband CSI and subband CSI measurement results, and further report the measurement results to the network side device, so that the network side device can be based on the measurement result reported by the first device Scheduling the first device, so as to perform scheduling compared to the scheme in which the base station cannot obtain the CSI measurement results reported by the UE, can improve the scheduling efficiency of the network-side device, and improve system performance and user experience.

[0230] It should be understood that in this embodiment of the present invention, the processor 610 may be a central processing unit (Central Processing Unit, referred to as "CPU"), and the processor 610 may also be other general-purpose processors or digital signal processors. (DSP), application specific integrated circuit (ASIC), off-the-shelf programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.

[0231] The memory 620 may include a read-only memory and a random access memory, and provides instructions and data to the processor 610. A part of the memory 620 may also include a non-volatile random access memory. For example, the memory 620 may also store device type information.

[0232] In addition to the data bus, the bus system 630 may also include a power bus, a control bus, and a status signal bus. However, for clear description, various buses are marked as the bus system 630 in the figure.

[0233] In the implementation process, the steps of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 610 or instructions in the form of software. The steps of the method disclosed in the embodiments of the present invention may be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor. The software module can be located in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers. The storage medium is located in the memory 620, and the processor 610 reads the information in the memory 620, and completes the steps of the foregoing method in combination with its hardware. To avoid repetition, it will not be described in detail here.

[0234] Optionally, the wideband CSI measurement includes at least one of the following measurements: rank indicator RI measurement, wideband channel quality

Quantity indicates CQI measurement and wideband precoding indicates PMI measurement.

[0235] Optionally, as another embodiment, the incomplete overlap of the first measurement frequency band and the second measurement frequency band includes:

[0236] The first measurement frequency band and the second measurement frequency band do not overlap at all; or

[0237] Part of the frequency band in the first measurement frequency band overlaps with part of the frequency band in the second measurement frequency band; or

[0238] The first measurement frequency band is a part of the second measurement frequency band.

[0239] Optionally, as another embodiment, the processor 610 is specifically configured to:

[0240] Determine the first measurement frequency band used when the first device performs RI measurement from at least two first candidate CSI measurement frequency bands of the first device; and/or

[0241] Determine the second measurement frequency band used by the first device to perform subband CSI measurement from at least two second candidate CSI measurement frequency bands of the first device.

[0242] Optionally, as another embodiment, the CSI measurement frequency band indication information includes at least one of the following information: first adjustment frequency band information and second adjustment frequency band information, where:

[0243] The first adjustment frequency band information is used to indicate that the first measurement frequency band is obtained by the first device after adjusting the measurement frequency band used for the last wideband CSI measurement according to the frequency band bandwidth corresponding to the first adjustment frequency band information. Frequency band,

[0244] The second adjustment frequency band information is used to indicate that the second measurement frequency band is determined by the first device after adjusting the measurement frequency band used for the last subband CSI measurement according to the frequency band bandwidth corresponding to the second adjustment frequency band information. Obtained frequency band.

[0245] Optionally, as another embodiment, the CSI measurement frequency band indication information is semi-static signaling or dynamic signaling.

[0246] Optionally, as another embodiment, if the UE is configured with at least one CSI process, the at least one CSI process corresponds to the same first measurement frequency band and the same second measurement frequency band; or

[0247] If the UE is configured with at least one CSI process, the at least one CSI process corresponds to the same first measurement frequency band, and the first CSI process and the second CSI process in the at least one CSI process correspond to different second Measurement frequency band; or

[0248] If the UE is configured with at least one CSI process, the at least one CSI process corresponds to the same second measurement frequency band, and the first CSI process and the second CSI process in the at least one CSI process correspond to different first Measurement frequency band.

[0249] Optionally, as another embodiment, if the UE is configured with at least two subframe sets, the at least two subframe sets correspond to the same first measurement frequency band and the same second measurement frequency band; or

[0250] If the UE is configured with at least two subframe sets, the at least two subframe sets correspond to the same first measurement frequency band, and the first subframe set and the second subframe set in the at least two subframe sets correspond to different [0251] If the UE is configured with at least two subframe sets, the at least two subframe sets correspond to the same second measurement frequency band and the first subframe set in the at least two subframe sets and The second subframe set corresponds to a different first measurement frequency band.

[0252] Optionally, as another embodiment, the transmitter 640 is further configured to send CSI report indication information to the first device, where the CSI report indication information is used to instruct the first device to report CSI;

[0253] Correspondingly, the apparatus 600 further includes a receiver 650, configured to receive the measurement result of the CSI measurement performed by the first device according to the CSI report indication information sent by the transmitter 640 and the CSI measurement band indicator information.

[0254] The apparatus 600 for measuring CSI according to an embodiment of the present invention may correspond to the network side device in the method for measuring CSI according to an embodiment of the present invention, and the above-mentioned sum of the various modules in the apparatus 600 Other operations and/or functions are used to implement the corresponding procedures of each method in FIG. 2, and are not repeated here for brevity.

[0255] Therefore, according to the apparatus for measuring CSI according to the embodiment of the present invention, the bandwidth of the first device is smaller than that of the downlink transmission band.

Perform wideband CSI measurement on the wide first measurement frequency band, and perform subband CSI measurement on the second measurement frequency band that does not completely overlap with the first measurement frequency band. The measurement results of wideband CSI and subband CSI can be obtained, and the measurement results of the wideband CSI and subband CSI can be obtained. The measurement result is reported to the network-side device, so that the network-side device can schedule the first device according to the measurement result reported by the first device, so that the base station cannot obtain the CSI measurement result reported by the UE. It can improve the scheduling efficiency of the network side equipment, and improve the system performance and user experience. Further, in a frequency domain dynamic interference control scenario, the first measurement frequency band may be a frequency band with relatively stable interference. In this way, the accuracy of the CSI measurement result obtained by the first device is higher. In addition, the first measurement frequency band is more accurate than the The second measurement frequency bands of the subband CSI measurement performed by the first device do not completely overlap, so that the subband CSI measurement result of the first device can include more frequency band information, thereby improving the accuracy of the CSI measurement result of the first device. While maintaining the comprehensiveness of the measurement results, the efficiency of scheduling by the network-side equipment based on the CSI measurement results reported by the first device is improved, and the system performance and user experience are improved; and the network-side equipment can know the interference on each frequency band Information to know which sub-band CSI measurement results reported by the UE can provide scheduling Accurate information, and the above beneficial effects are more prominent when the first device supports only one CSI process.

[0256] It should be understood that, in the embodiments of the present invention, the term "and/or" is merely an association relationship describing an associated object, which means that there may be three relationships. For example, A and/or B can mean: A alone exists, A and B exist at the same time, and B exists alone. In addition, the character 7" in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0257] A person of ordinary skill in the art may realize that, in combination with the method steps and units described in the embodiments disclosed herein, they can be implemented by electronic hardware, computer software, or a combination of the two, in order to clearly illustrate the hardware and For the interchangeability of software, the steps and components of each embodiment have been described generally in terms of function in the above description. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. A person of ordinary skill in the art can use different methods for each specific application to implement the described functions, but such implementation should not be considered as going beyond the scope of the present invention.

[0258] Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the system, device, and unit described above can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here. . [0259] In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may also be electrical, mechanical or other forms of connection.

[0260] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple networks. Unit. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments of the present invention.

[0261] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.

[0262] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of the present invention is essentially or a part that contributes to the existing technology, or all or part of the technical solution can be in the form of a software product

It is embodied that the computer software product is stored in a storage medium and includes several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the methods described in the various embodiments of the present invention step. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, referred to as "ROM"), random access memory (Random Access Memory, referred to as "RAM"), magnetic disk or optical disk, etc. Various media that can store program codes.

[0263] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited to this. Any person skilled in the art can easily think of various types within the technical scope disclosed by the present invention. Equivalent modifications or replacements shall be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.