CN110351869B

CN110351869B - Method and device for measuring channel state information

Info

Publication number: CN110351869B
Application number: CN201910513198.6A
Authority: CN
Inventors: 孙静原; 薛丽霞
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2013-12-31
Filing date: 2013-12-31
Publication date: 2023-06-06
Anticipated expiration: 2033-12-31
Also published as: CN110351870B; CN110351870A; CN104995857A; CN110351869A; WO2015100619A1; CN104995857B

Abstract

The invention discloses a method and a device for measuring CSI, wherein the method comprises the following steps: the first device determines a first measurement frequency band for performing wideband CSI measurements and a second measurement frequency band for performing subband CSI measurements; performing wideband CSI measurements on the first measurement frequency band; subband CSI measurements are made on the second measurement frequency band. According to the method and the device for measuring the CSI, compared with a scheme that the base station cannot obtain the CSI measurement result reported by the UE and performs scheduling, scheduling efficiency of the network side equipment can be improved, and system performance and user experience are improved.

Description

Method and device for measuring channel state information

Technical Field

The embodiment of the invention relates to the field of communication, and more particularly relates to a method and a device for measuring channel state information.

Background

In a wireless communication system, in order to improve scheduling efficiency of a base station, user Equipment (UE) needs to measure Channel State-Information (CSI), and report a measurement result of CSI measurement to the base station, so that the base station may perform resource scheduling according to the CSI measurement result reported by the UE, where the CSI measurement result reported by the UE includes wideband CSI and subband CSI, where the wideband CSI is CSI obtained by the UE by measuring an entire downlink system bandwidth, and the subband CSI is CSI obtained by the UE by measuring some or all subbands included in the entire downlink system bandwidth.

Disclosure of Invention

The embodiment of the invention provides a method and a device for measuring CSI, which can also realize the measurement of broadband CSI and subband CSI.

In a first aspect, a method for measuring CSI is provided, comprising: the method comprises the steps that first equipment determines a first measurement frequency band and a second measurement frequency band, wherein the first measurement frequency band is used for carrying out broadband CSI measurement, the second measurement frequency band is used for carrying out subband CSI measurement, 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 not completely overlapped; performing wideband CSI measurements on the first measurement frequency band; and carrying out subband CSI measurement on the second measurement frequency band according to the measurement result obtained by the broadband CSI measurement.

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 indication RI measurement, wideband channel quality indication CQI measurement, and wideband precoding indication PMI measurement.

With reference to the foregoing possible implementation manner, 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 not overlapped at all; or a partial frequency band in the first measurement frequency band overlaps with a partial frequency band in the second measurement frequency band; or the first measurement band is part of the second measurement band.

With reference to the foregoing possible implementation manners, in a third possible implementation manner, the determining a first measurement frequency band and a second measurement frequency band includes: and determining 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 equipment.

With reference to the third possible implementation manner, in a fourth possible implementation manner, the determining at least one of the first measurement band and the second measurement band according to CSI measurement band indication information sent by the network side device 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 equipment; and/or determining 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 equipment.

With reference to the third possible implementation manner, in a fifth possible implementation manner, the CSI measurement band indication information includes at least one of the following information: the determining at least one of the first measurement band and the second measurement band according to CSI measurement band indication information sent by the network side device includes: determining the first measurement frequency band as a frequency band obtained after the measurement frequency band adopted by the last wideband CSI measurement is adjusted according to the frequency band bandwidth corresponding to the first adjustment frequency band information; and/or determining the second measurement frequency band as a frequency band obtained after the measurement frequency band adopted by the last subband CSI measurement is adjusted according to the frequency band width corresponding to the second adjustment frequency band information.

With reference to any one of the second to fifth possible implementations, in a sixth possible implementation, the CSI measurement band indication information is semi-static signaling or dynamic signaling.

With reference to the foregoing possible implementation manner, 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 measurement frequency band and the first CSI process and the second CSI process of the at least one CSI process correspond to different first measurement frequency bands.

With reference to the foregoing possible implementation manner, 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; 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 the same second measurement frequency band and a first subframe set and a second subframe set of the at least two subframe sets correspond to different first measurement frequency bands.

With reference to the foregoing possible implementation manner, in a ninth possible implementation manner, before performing wideband CSI measurement on the first measurement frequency band, the method further includes: receiving CSI reporting indication information sent by network side equipment, wherein the CSI reporting indication information is used for indicating the first equipment to report CSI to the network side equipment; the performing wideband CSI measurement on the first measurement frequency band includes: according to the CSI reporting indication information, wideband CSI measurement is carried out on the first measurement frequency band;

the method further comprises the steps of: and reporting the measurement result of the wideband CSI measurement and the measurement result of the sub-band CSI measurement to the network side equipment.

In a second aspect, a method for measuring channel state information CSI is provided, comprising: the network side equipment determines a CSI measurement frequency band adopted when the first equipment performs CSI measurement, wherein the CSI measurement frequency band comprises at least one of the following frequency bands: a first measurement band for performing wideband CSI measurement and a second measurement band for performing subband CSI measurement, wherein a bandwidth of the first measurement band is smaller than a downlink transmission bandwidth and the first measurement band does not completely overlap the second measurement band; and transmitting CSI measurement frequency band indication information to the first equipment, wherein the CSI measurement frequency band indication information is used for indicating the CSI measurement frequency band.

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 indication RI measurement, wideband channel quality indication CQI measurement, and wideband precoding indication PMI measurement.

With reference to the foregoing possible implementation manner, in a third possible implementation manner, the determining a CSI measurement band used when the first device performs CSI measurement includes: determining a first measurement frequency band adopted when the first device performs RI measurement from at least two first candidate CSI measurement frequency bands of the first device; and/or determining a second measurement band adopted when the first device performs sub-band CSI measurement from at least two second candidate CSI measurement bands of the first device.

With reference to the foregoing possible implementation manner, in a fourth possible implementation manner, the CSI measurement band indication information includes at least one of the following information: the first adjustment frequency band information is used for indicating the first measurement frequency band to be a frequency band obtained after the first device adjusts the measurement frequency band used for carrying out the wideband CSI measurement last time according to the frequency band bandwidth corresponding to the first adjustment frequency band information, and the second adjustment frequency band information is used for indicating the second measurement frequency band to be a frequency band obtained after the first device adjusts the measurement frequency band used for carrying out the sub-band CSI measurement last time according to the frequency band bandwidth corresponding to the second adjustment frequency band information.

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

With reference to the foregoing possible implementation manner, 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 measurement frequency band and the first CSI process and the second CSI process of the at least one CSI process correspond to different first measurement frequency bands.

With reference to the foregoing possible implementation manner, 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; 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 the same second measurement frequency band and a first subframe set and a second subframe set of the at least two subframe sets correspond to different first measurement frequency bands.

With reference to the foregoing possible implementation manner, in an eighth possible implementation manner, the method further includes: transmitting CSI reporting indication information to the first equipment, wherein the CSI reporting indication information is used for indicating the first equipment to report CSI; and receiving a measurement result of the first equipment for CSI measurement according to the CSI reporting indication information and the CSI measurement frequency band indication information.

In a third aspect, an apparatus for measuring channel state information CSI is provided, comprising: a determining module, configured to determine a first measurement frequency band and a second measurement frequency band, where the first measurement frequency band is used for performing wideband CSI measurement, and the second measurement frequency band is used for performing subband CSI measurement, where a bandwidth of the first measurement frequency band is smaller than a downlink transmission bandwidth and the first measurement frequency band and the second measurement frequency band do not completely overlap; a first measurement module, configured to perform wideband CSI measurement on the first measurement frequency band determined by the determination module; and the second measurement module is used for carrying out subband CSI measurement on the second measurement frequency band according to the measurement result obtained by the first measurement module for carrying out the broadband CSI measurement.

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 indication RI measurement, wideband channel quality indication CQI measurement, and wideband precoding indication PMI measurement.

With reference to the foregoing possible implementation manner, in a third possible implementation manner, the determining module is specifically configured to determine at least one of the first measurement band and the second measurement band according to CSI measurement band indication information sent by the network side device.

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

With reference to the third possible implementation manner, in a fifth possible implementation manner, the CSI measurement band indication information includes at least one of the following information: first adjustment frequency band information and second adjustment frequency band information, the determination module including: a third determining unit, configured to determine that the first measurement frequency band is a frequency band obtained after adjustment of a measurement frequency band used for performing wideband CSI measurement last time according to a frequency band bandwidth corresponding to the first adjustment frequency band information; and/or a fourth determining unit, configured to determine the second measurement frequency band as a frequency band obtained after the measurement frequency band used for performing the subband CSI measurement last time is adjusted according to the frequency bandwidth corresponding to the second adjustment frequency band information.

With reference to the foregoing possible implementation manner, in a ninth possible implementation manner, the apparatus further includes: the receiving module is used for receiving CSI reporting indication information sent by the network side equipment before the first measuring module performs broadband CSI measurement on the first measuring frequency band, wherein the CSI reporting indication information is used for indicating the first equipment to report CSI to the network side equipment; the first measurement module is specifically configured to perform wideband CSI measurement on the first measurement frequency band according to the CSI reporting indication information received by the receiving module; the apparatus further comprises: and the reporting module is used for reporting the measurement result of the broadband CSI measurement performed by the first measurement module and the measurement result of the subband CSI measurement performed by the second measurement module to the network side equipment.

In a fourth aspect, an apparatus for measuring channel state information CSI is provided, comprising: a determining module, configured to determine a CSI measurement band used when the first device performs CSI measurement, where the CSI measurement band includes at least one of the following bands: a first measurement band for performing wideband CSI measurement and a second measurement band for performing subband CSI measurement, wherein a bandwidth of the first measurement band is smaller than a downlink transmission bandwidth and the first measurement band does not completely overlap the second measurement band; and the transmitting module is used for transmitting CSI measurement frequency band indication information to the first equipment, wherein the CSI measurement frequency band indication information is used for indicating the CSI measurement frequency band determined by the determining module.

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 indication RI measurement, wideband channel quality indication CQI measurement, and wideband precoding indication PMI measurement.

With reference to the foregoing possible implementation manners, in a third possible implementation manner, the determining module is specifically configured to: determining a first measurement frequency band adopted when the first device performs RI measurement from at least two first candidate CSI measurement frequency bands of the first device; and/or determining a second measurement band adopted when the first device performs sub-band CSI measurement from at least two second candidate CSI measurement bands of the first device.

With reference to the foregoing possible implementation manner, in an eighth possible implementation manner, the sending module is further configured to send CSI reporting indication information to the first device, where the CSI reporting indication information is used to indicate that the first device reports CSI; the apparatus further comprises: and the receiving module is used for receiving the measurement result of the CSI measurement by the first equipment according to the CSI reporting indication information and the CSI measurement frequency band indication information sent by the sending module.

Based on the above technical solution, in the method and the device for measuring CSI provided by the embodiments of the present invention, a first device performs wideband CSI measurement on a first measurement frequency band with a bandwidth smaller than a downlink transmission bandwidth, and performs subband CSI measurement on a second measurement frequency band that does not completely overlap with the first measurement frequency band, so that measurement results of wideband CSI and subband CSI can be obtained, and the measurement results can be further reported to a network side device, so that the network side device can schedule the first device according to the measurement results reported by the first device, thereby, compared with a scheme that a base station cannot obtain CSI measurement results reported by UEs and performs scheduling, scheduling efficiency of the network side device can be improved, and system performance and user experience can be improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the embodiments of the present invention or the drawings used in the description of the prior art, and it is obvious that the drawings described below are only some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic flow chart of a method for measuring CSI according to an embodiment of the present invention.

Fig. 2 is another schematic flow chart of a method for measuring CSI according to an embodiment of the present invention.

Fig. 3 is a schematic diagram of band allocation in a method for measuring CSI according to an embodiment of the present invention.

Fig. 4 is a schematic block diagram of an apparatus for measuring CSI according to an embodiment of the present invention.

Fig. 5 is a schematic block diagram of an apparatus for measuring CSI according to another embodiment of the present invention.

Fig. 6 is a schematic block diagram of an apparatus for measuring CSI according to still another embodiment of the present invention.

Fig. 7 is a schematic block diagram of an apparatus for measuring CSI according to still another embodiment of the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

It should be understood that the technical solution of the embodiment of the present invention may be applied to various communication systems, for example: global mobile communications (Global System of Mobile communication, abbreviated as "GSM") system, code division multiple access (Code Division Multiple Access, abbreviated as "CDMA") system, wideband code division multiple access (Wideband Code Division Multiple Access, abbreviated as "WCDMA") system, general packet radio service (General Packet Radio Service, abbreviated as "GPRS"), long term evolution (Long Term Evolution, abbreviated as "LTE") system, LTE frequency division duplex (Frequency Division Duplex, abbreviated as "FDD") system, LTE time division duplex (Time Division Duplex, abbreviated as "TDD"), universal mobile telecommunications system (Universal Mobile Telecommunication System, abbreviated as "UMTS"), worldwide interoperability for microwave access (Worldwide Interoperability for Microwave Access, abbreviated as "WiMAX") communication system, and the like.

It should also be appreciated that in embodiments of the present invention, a User Equipment (UE) may be referred to as a Terminal, mobile Station, mobile Terminal, or the like, which may communicate with one or more core networks via a radio access network (Radio Access Network, RAN), such as a Mobile telephone (or "cellular" telephone), a computer with a Mobile Terminal, or the like, such as a portable, pocket, hand-held, computer-built-in, or vehicle-mounted Mobile device that exchanges voice and/or data with the radio access network.

It should also be understood that, in the embodiment of the present invention, the base station may be a base station (Base Transceiver Station, abbreviated as "BTS") in GSM or CDMA, a base station (NodeB) in WCDMA, or an evolved Node B (abbreviated as "eNB" or "e-NodeB") in LTE, which is not limited in this aspect of the present invention.

The method and the device for measuring the CSI are mainly applied to the scene of carrying out wideband CSI measurement and subband CSI measurement on one carrier, but can also be applied to other scenes, and the embodiment of the invention is not limited to the scene.

Fig. 1 shows a schematic flow chart of a method 100 for measuring CSI according to an embodiment of the present invention, which may be performed by a first device, which may be a UE, but the embodiment of the present invention is not limited thereto. As shown in fig. 1, the method 100 includes:

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 performing wideband CSI measurement, and the second measurement frequency band is used for performing subband CSI measurement, where a bandwidth of the first measurement frequency band is smaller than a downlink transmission bandwidth and the first measurement frequency band and the second measurement frequency band do not completely overlap.

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 smaller than the downlink system bandwidth; or the downlink transmission bandwidth is a transmission bandwidth when another UE performs Device-to-Device (D2D) communication with the UE, but the embodiment of the invention is not limited thereto.

The first measurement frequency band is used for making wideband CSI measurements, which may optionally 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, and accordingly, the first measurement band is used to make at least one of the following measurements: RI measurement, wideband PMI measurement, and wideband CQI measurement. Preferably, the first measurement band may be used for RI measurement and/or wideband PMI measurement, but the embodiment of the invention is not limited thereto.

The second measurement frequency band is used for making subband CSI measurements, wherein the subband CSI measurements may comprise at least one of the following measurements: subband PMI measurement and subband CQI measurement. Alternatively, the second measurement frequency band may include at least two sub-bands, 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.

The first measurement frequency band is a reference resource of wideband CSI in a frequency domain, and each sub-band in the second measurement frequency band is a reference resource of CSI corresponding to the sub-band in the frequency domain.

And S120, performing wideband CSI measurement on the first measurement frequency band.

Performing wideband PMI measurement on the first measurement frequency band may refer to the first device selecting a wideband PMI from a codebook if the first device assumes downlink transmission on the first measurement frequency band, and the selecting may include the first device selecting according to a channel measured on the first measurement frequency band; performing wideband CQI measurements on the first measurement frequency band may refer to the first device assuming downlink transmissions to calculate wideband CQI on the first measurement frequency band; the RI measurement on the first measurement band may refer to that the first device obtains RI or obtains RI and PMI when it assumes downlink transmission on the first measurement band, but the embodiment of the present invention is not limited thereto.

Alternatively, the UE may perform wideband CSI measurement as an instantaneous measurement, for example, measurement on one subframe, or the UE may perform wideband CSI measurement on a plurality of subframes and perform statistical processing on measurement results on the plurality of subframes, but the embodiment of the present invention is not limited thereto.

And S130, carrying out subband CSI measurement on the second measurement frequency band according to the measurement result obtained by the broadband CSI measurement.

The second measurement frequency band may include a plurality of subbands, and accordingly, the first device may perform subband CSI measurement on the second measurement frequency band, and may include the first device performing subband CSI measurement on at least one subband among the plurality of subbands included in the second measurement frequency band. The first device may perform subband CSI measurements on the second measurement frequency band according to the measurement results of RI measurements and/or wideband PMI measurements; subband CSI measurements may also be performed on the second measurement band based on the measurement results of the wideband CQI measurements, although embodiments of the invention are not limited thereto.

Alternatively, the UE may perform the subband CSI measurement as an instantaneous measurement, for example, performing the subband CSI measurement on one subframe, but the embodiment of the present invention is not limited thereto.

Therefore, according to the method for measuring CSI in the embodiment of the present invention, the first device performs wideband CSI measurement on the first measurement frequency band with a bandwidth smaller than the downlink transmission bandwidth, and performs subband CSI measurement on the second measurement frequency band that does not completely overlap with the first measurement frequency band, so that measurement results of wideband CSI and subband CSI can be obtained, and the measurement results can be further reported to the network side device, so that the network side device can schedule the first device according to the measurement results reported by the first device, and therefore, compared with a scheme that the base station cannot obtain the CSI measurement results reported by the UE and performs scheduling, scheduling efficiency of the network side device can be improved, and system performance and user experience can be improved.

When the invention is applied to a frequency domain dynamic interference control scene, for example, the system adopts technologies such as dynamic node silencing, dynamic power control or dynamic interference coordination (such as interference direction coordination) and the like in the frequency domain, in the prior art, the first equipment performs wideband CSI and subband CSI measurement on the whole downlink system bandwidth, however, because the interference on different frequency bands of the whole downlink system bandwidth is different, wideband CSI measurement on the whole downlink system bandwidth can cause inaccuracy of wideband CSI, and the inaccuracy of the measurement result of wideband CSI can further cause inaccuracy of the measurement result of subband CSI, thereby reducing the scheduling efficiency of a base station based on the CSI measurement result reported by UE and reducing the system performance and user experience. In the embodiment of the present invention, optionally, the first device performs interference stabilization on a first measurement frequency band of wideband CSI measurement, that is, the first measurement frequency band may be a frequency band with relatively stable interference, specifically, interference fluctuation on the first measurement frequency band may be lower than a certain threshold, where the threshold may be predefined or preconfigured by a network side device, for example, the first measurement frequency band is a frequency band that is not subjected to frequency domain dynamic interference control; or the transmission mode adopted by the first measurement frequency band for the main interference cell does not change or the change of the transmission mode accords with a preset condition, optionally, the preset condition can comprise that the transmission mode changes among different elements in a preset transmission mode set, and the like; or the first measurement frequency band is a frequency band in which a transmission mode adopted by the main interference cell does not change, wherein the transmission mode can comprise unicast or multicast, etc., and the embodiment of the invention is not limited to the above; and the second measurement band may comprise a frequency band where interference is unstable, i.e. a frequency band where interference is dynamically changing. In this way, compared with the prior art, the accuracy of the wideband 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 subband CSI measurement performed by the first device, so that the subband CSI measurement result of the first device includes information of more frequency bands, the accuracy of the CSI measurement result of the first device is improved, the comprehensiveness of the measurement result is maintained, the scheduling efficiency of the network side device according to the CSI measurement result reported by the first device is improved, and the system performance and user experience are improved.

In the embodiment of the present invention, the first measurement frequency band is a part of a downlink system bandwidth, the second measurement frequency band may be a downlink system bandwidth or a part of a downlink system bandwidth, and the first measurement frequency band and the second measurement frequency band do not completely overlap, alternatively, the bandwidth of the first measurement frequency band may be smaller than the bandwidth of the second measurement frequency band, so that a measurement result of the first device performing sub-band CSI measurement on the second measurement frequency band may include information on more frequency bands, which is helpful for the network side device to perform scheduling according to the CSI measurement result of the first device, for example, if the downlink system bandwidth is 10MHz, the bandwidth of the first measurement frequency band of the first device may be 5MHz, and the bandwidth of the second measurement frequency band may be 7MHz; or the downlink system bandwidth is divided into 8 subbands, the first measurement band may include 2 subbands and the second measurement band may include 5 subbands; or the downlink system bandwidth includes 50 physical resource blocks (Physical Resource Block, PRBs), the first measurement band may include 10 PRBs and the second measurement band may include 20 PRBs, but the embodiment of the invention is not limited thereto.

Optionally, 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 not overlapped at all; or (b)

A partial frequency band in the first measurement frequency band overlaps with a partial frequency band in the second measurement frequency band; or (b)

The first measurement band is a portion of the second measurement band.

Wherein the first measurement frequency band and the second measurement frequency band may not overlap at all, i.e. the first measurement frequency band and the second measurement frequency band have no intersection in the frequency domain; the partial frequency bands in the first measurement frequency band may also overlap with the partial frequency bands 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; alternatively, the first measurement frequency band may 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 include both a frequency band with relatively stable interference and a frequency band with dynamically changing interference.

The first device may determine the first measurement frequency band and the second measurement frequency band in a number of ways, alternatively 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 band by blind detection of interference stability, for example, the first device uses a frequency band with more 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 determined according to indication information of the network side device, where the indication information is used to indicate a measurement frequency band adopted when the first device performs CSI measurement, but the embodiment of the invention is not limited thereto.

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

s110a, determining 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 equipment.

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

Optionally, the CSI measurement band indication information may explicitly or implicitly indicate the first measurement band and/or the second measurement band, taking the example that the CSI measurement band indication information indicates the first measurement band, the CSI measurement band indication information may explicitly indicate the first measurement band, or may indicate the first measurement band by indicating a complement of the first measurement band on a downlink system bandwidth; the CSI measurement band indication information may further indicate the first measurement band implicitly by indicating a first adjustment band, where the first adjustment band is used to indicate a band value for adjusting a certain reference band, that is, the first measurement band is a band obtained after adjusting the reference band according to the first adjustment band, optionally, the reference band may be predefined, or may be a measurement band used when the first device performs wideband CSI measurement last or N times, and the embodiment of the present invention is not limited thereto.

Optionally, if the first device receives CSI measurement band indication information sent by the network side device, the CSI measurement band indication information includes at least one of the following information: first and second adjustment frequency band information,

Accordingly, S110a, determining at least one of the first measurement band and the second measurement band according to CSI measurement band indication information sent by the network side device, includes:

s111, determining the first measurement frequency band as a frequency band obtained after the measurement frequency band adopted by the last wideband CSI measurement is adjusted according to the frequency band bandwidth corresponding to the first adjustment frequency band information; and/or

And S112, determining the second measuring frequency band as a frequency band obtained after the measuring frequency band adopted by the last sub-band CSI measurement is adjusted according to the frequency band width corresponding to the second adjusting frequency band information.

The first adjustment frequency band information is used for indicating how the first device adjusts based on a measurement frequency band adopted when the first device performs wideband CSI measurement last time, so as to obtain the first measurement frequency band. Optionally, the first adjustment frequency band information may include the first frequency band adjustment value, and accordingly, the first device may add the first frequency band adjustment value to the bandwidth of the measurement frequency band used when the RI measurement is performed last time, as the bandwidth of the first measurement frequency band used when the wideband CSI measurement is performed this time, where the first frequency band adjustment value may be a positive number or a negative number, and corresponds to increasing or decreasing the number of measurement frequency bands based on the bandwidth of the measurement frequency band used when the RI measurement is performed last time by the first device, where the embodiment of the present invention is not limited thereto; optionally, the network side device and the first device may also pre-agree on an adjustment step length of the measurement band of the wideband CSI measurement, where the adjustment step length may be a fixed value or may depend on a downlink system bandwidth, for example, if the downlink system bandwidth is 10MHz, the adjustment step length is 1MHz, and if the downlink system bandwidth is 20MHz, the adjustment step length is 2MHz, and optionally, the adjustment step length may also be a size of one subband, but embodiments of the present invention are not limited thereto; accordingly, the first adjustment frequency band information may include a multiple of an adjustment step size of the frequency band, and the first device regards a product of the multiple and the step size as the first frequency band adjustment value. Alternatively, as another embodiment, there may be a plurality of adjustment steps indicated by a predefined or network side device, and the first adjustment band information may also indicate the adjustment step adopted this time, but the embodiment of the present invention is not limited thereto.

After the first device determines the bandwidth of the first measurement frequency band, the measurement frequency band adopted when the wideband CSI measurement is performed last time may be adjusted in a plurality of manners to determine the first measurement frequency band, where the adjustment manner may be predefined or indicated by the network side device, alternatively, the first device may fix one end of the measurement frequency band adopted last time and adjust only the other end, or adjust both ends of the measurement frequency band adopted last time, for example, the measurement frequency band adopted when the first device performs the wideband CSI measurement last time is 5MHz, and the first frequency band adjustment value is 2MHz, and the first device may keep the minimum frequency of the wideband CSI measurement performed last time unchanged and increase the maximum frequency by 2MHz; or the maximum frequency of the last wideband CSI measurement is kept unchanged, and the minimum frequency is reduced by 2MHz; or decrease the minimum frequency of the last wideband CSI measurement by 1MHz and increase the maximum frequency by 1MHz, but the embodiment of the present invention is not limited thereto.

Similarly, the second adjustment frequency band information is used to indicate how the first device performs adjustment based on the measurement frequency band used when the subband CSI measurement is performed last time, so as to obtain the second measurement frequency band, and the implementation of the second adjustment frequency band information can be referred to the description of the first adjustment frequency band information, which is omitted herein for brevity.

Optionally, as another embodiment, the first device may further have at least two first candidate measurement bands, and the network side device may instruct the first device to take a certain first candidate measurement band of the at least two first candidate measurement bands as a first measurement band; similarly, the first device may also have at least two second candidate measurement bands, and the network side device may instruct the first device to take a certain second candidate measurement band of the at least two second candidate measurement bands as a second measurement band, and accordingly, S110a, determine at least one of the first measurement band and the second measurement band according to CSI measurement band indication information sent by the network side device, including:

s113, 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 equipment; and/or

And S114, determining 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 equipment.

The at least two first candidate measurement bands and/or the at least two second candidate measurement bands may be predefined, or configured by the network side device through higher layer signaling in advance, which is not limited by the embodiment of the present invention.

Alternatively, the CSI measurement band indication information may be physical layer signaling or higher layer signaling, for example, downlink control information (Downlink Control Information, DCI) or radio resource control (Radio Resource Control, RRC), where the first measurement band and/or the second measurement band may be indicated by adding or multiplexing at least one bit (for example, adding 1-2 bits) in the DCI, and the RRC may be newly added signaling or multiplexing existing signaling. Any one of the first measurement band and the second measurement band may be dynamically configured or semi-statically configured by the network side device, and accordingly, the CSI measurement band indication information is semi-static signaling or dynamic signaling, but the embodiment of the present invention is not limited thereto.

Alternatively, 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 a first measurement frequency band and a second measurement frequency band, wherein all of 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 second measurement frequency band of each of the at least two CSI processes may be independent of each other, i.e., the first measurement frequency band and/or the second measurement frequency band of each of the at least two CSI processes may be different from each other, or the first measurement frequency band and/or the second measurement frequency band of a part of the at least two CSI processes may be the same, respectively, 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 (b)

If the UE is configured with at least one CSI process, the at least one CSI process corresponds to the same first measurement band and a first CSI process and a second CSI process in the at least one CSI process correspond to different second measurement bands; or (b)

If the UE is configured with at least one CSI process, the at least one CSI process corresponds to the same second measurement band and a first CSI process and a second CSI process of the at least one CSI process correspond to different first measurement bands.

Optionally, the network side device may configure the first measurement band and/or the second measurement band for all CSI processes in the at least two CSI processes through independent configuration signaling, or may further independently configure the first measurement band and/or the second measurement band for each CSI process in the at least two CSI processes, which is not limited in this embodiment of the present invention.

Alternatively, as another embodiment, if the first device is configured with at least two subframe sets, each subframe set of the at least two subframe sets may correspond to one first measurement frequency band and one second measurement frequency band, wherein all subframe sets of the at least two subframe sets 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 second measurement frequency band of each subframe set of the at least two subframe sets may be independent of each other, i.e. the first measurement frequency band and/or the second measurement frequency band of each subframe set of the at least two subframe sets may be different from each other, or the first measurement frequency band and/or the second measurement frequency band of a part of subframe sets of the at least two subframe sets may be the same, respectively,

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 (b)

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 a first subframe set and a second subframe set in the at least two subframe sets correspond to different second measurement frequency bands; or (b)

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 a first subframe set and a second subframe set of the at least two subframe sets correspond to different first measurement frequency bands.

Optionally, the first device may actively perform wideband CSI measurement and subband CSI measurement, and send measurement results to the network side device, and accordingly, the method 100 further includes: reporting the measurement result of the wideband CSI measurement and the measurement result of the sub-band CSI measurement to the network side equipment; optionally, as another embodiment, the first device may also perform wideband CSI measurement and subband CSI measurement according to the indication of the network side device, and report the measurement result to the network side device, and before S120, the method 100 further includes:

S140, receiving CSI reporting indication information sent by network side equipment, wherein the CSI reporting indication information is used for indicating the first equipment to report broadband CSI and subband CSI to the network side equipment;

s120, performing wideband CSI measurement on the first measurement frequency band, including:

s121, wideband CSI measurement is carried out on the first measurement frequency band according to the CSI reporting indication information.

The combination of the first device and the network side device may be 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 invention is not limited thereto.

Therefore, according to the method for measuring CSI in the embodiment of the present invention, the first device performs wideband CSI measurement on the first measurement frequency band with a bandwidth smaller than the downlink transmission bandwidth, and performs subband CSI measurement on the second measurement frequency band that does not completely overlap with the first measurement frequency band, so that measurement results of wideband CSI and subband CSI can be obtained, and the measurement results can be further reported to the network side device, so that the network side device can schedule the first device according to the measurement results reported by the first device, and therefore, compared with a scheme that the base station cannot obtain the CSI measurement results reported by the UE and performs scheduling, scheduling efficiency of the network side device can be improved, and system performance and user experience can be improved. Further, in the frequency domain dynamic interference control scenario, the first measurement frequency band may be a frequency band with stable interference, so that accuracy of a CSI measurement result obtained by the first device is higher, in addition, the first measurement frequency band is not completely overlapped with a second measurement frequency band in which subband CSI measurement is performed by the first device, so that the subband CSI measurement result of the first device includes information of more frequency bands, accuracy of the CSI measurement result of the first device is improved, meanwhile, comprehensiveness of the measurement result is maintained, scheduling efficiency of the network side device according to the CSI measurement result reported by the first device is improved, and system performance and user experience are improved; the network side equipment can know the interference information on each frequency band, so that the network side equipment can know which sub-band CSI measurement results reported by the UE can provide accurate information for scheduling, and the beneficial effects are more prominent under the condition that the first equipment only supports one CSI process.

The method for measuring CSI according to the embodiment of the present invention is described in detail from the perspective of the first device in the above description with reference to fig. 1, and the method for measuring CSI according to the embodiment of the present invention is described in detail from the perspective of the network side device in the below description with reference to fig. 2.

Fig. 2 shows a schematic flow chart of a method 200 for measuring CSI according to an embodiment of the present invention, which may be performed by a network side device, which may alternatively be a base station, as shown in fig. 2, the method 200 includes:

s210, the network side device determines a CSI measurement band adopted when the first device performs CSI measurement, where the CSI measurement band includes at least one of the following bands: a first measurement band for performing wideband CSI measurement and a second measurement band for performing subband CSI measurement, wherein a bandwidth of the first measurement band is smaller than a downlink transmission bandwidth and the first measurement band does not completely overlap the second measurement band;

s220, transmitting CSI measurement band indication information to the first device, where the CSI measurement band indication information is used to indicate the CSI measurement band.

In the embodiment of the present invention, the CSI measurement band includes a first measurement band and/or a second measurement band, and the network side device indicates the CSI measurement band to the first device through CSI measurement band indication information, that is, indicates the first measurement band and/or the second measurement band. The network side device may explicitly indicate the CSI measurement band, or implicitly indicate the CSI measurement band, but the embodiment of the present invention is not limited thereto.

When the invention is applied to a frequency domain dynamic interference control scene, for example, the system adopts technologies such as dynamic node silencing, dynamic power control or dynamic interference coordination (such as interference direction coordination) and the like in the frequency domain, in the prior art, the first equipment performs wideband CSI and subband CSI measurement on the whole downlink system bandwidth, however, because the interference on different frequency bands of the whole downlink system bandwidth is different, wideband CSI measurement on the whole downlink system bandwidth can cause inaccuracy of wideband CSI, and the inaccuracy of the measurement result of wideband CSI can further cause inaccuracy of the measurement result of subband CSI, thereby reducing the scheduling efficiency of a base station based on the CSI measurement result reported by UE and reducing the system performance and user experience. In the embodiment of the present invention, optionally, the first device performs interference stabilization on a first measurement frequency band of wideband CSI measurement, that is, the first measurement frequency band may be a frequency band with relatively stable interference, specifically, interference fluctuation on the first measurement frequency band may be lower than a certain threshold, where the threshold may be predefined or preconfigured by a network side device, and the invention is not limited to this; and the second measurement band may comprise a frequency band where interference is unstable, i.e. a frequency band where interference is dynamically changing. In this way, compared with the prior art, the accuracy of the wideband 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 subband CSI measurement performed by the first device, so that the subband CSI measurement result of the first device includes information of more frequency bands, the accuracy of the CSI measurement result of the first device is improved, the comprehensiveness of the measurement result is maintained, the scheduling efficiency of the network side device according to the CSI measurement result reported by the first device is improved, and the system performance and user experience are improved.

Wherein the wideband CSI measurement may comprise at least one of the following measurements: RI measurement, wideband CQI measurement, and wideband PMI measurement. Performing wideband PMI measurement on the first measurement frequency band may refer to the first device selecting a wideband PMI from a codebook if the first device assumes downlink transmission on the first measurement frequency band, and the selecting may include the first device selecting according to a channel measured on the first measurement frequency band; performing wideband CQI measurements on the first measurement frequency band may refer to the first device assuming downlink transmissions to calculate wideband CQI on the first measurement frequency band; the RI measurement on the first measurement band may refer to that the first device obtains the PMI when it assumes downlink transmission on the first measurement band, but the embodiment of the present invention is not limited thereto.

The subband CSI measurements may include at least one of the following: subband PMI measurement and subband CQI measurement.

Optionally, as another embodiment, the first measurement frequency band and the second measurement frequency band do not completely overlap, including:

The first measurement band is a portion of the second measurement band.

Optionally, as another embodiment, the network side device may configure at least two first candidate CSI measurement bands for the first device through higher layer signaling in advance, or the first device predefines at least two first candidate CSI measurement bands, and then the network side device may select a certain first candidate measurement band from the at least two first candidate measurement bands as a first measurement band, and accordingly, S210, determine a CSI measurement band adopted when the first device performs CSI measurement, including:

s211, determining a first measurement frequency band adopted when the first device performs RI measurement from at least two first candidate CSI measurement frequency bands of the first device.

Optionally, as another embodiment, the network side device may configure at least two second candidate CSI measurement bands for the first device through higher layer signaling in advance, or the first device predefines at least two second candidate CSI measurement bands, and then the network side device may select a certain second candidate measurement band from the at least two second candidate measurement bands as a second measurement band, and accordingly, S110, determine a CSI measurement band adopted when the first device performs CSI measurement, including:

S212, determining a second measuring frequency band adopted when the first equipment performs sub-band CSI measurement from at least two second candidate CSI measuring frequency bands of the first equipment.

Optionally, the network side device may implicitly indicate the CSI measurement band by indicating a band adjustment bandwidth of the CSI measurement band to the first device, and specifically, the CSI measurement band indication information includes at least one of the following information: the first adjustment frequency band information is used for indicating the first measurement frequency band to be a frequency band obtained after the first device adjusts the measurement frequency band used for carrying out the wideband CSI measurement last time according to the frequency band bandwidth corresponding to the first adjustment frequency band information, and the second adjustment frequency band information is used for indicating the second measurement frequency band to be a frequency band obtained after the first device adjusts the measurement frequency band used for carrying out the sub-band CSI measurement last time according to the frequency band bandwidth corresponding to the second adjustment frequency band information.

The CSI measurement band indication information may be physical layer signaling or higher layer signaling, for example, DCI or RRC signaling, where the first measurement band and/or the second measurement band may be indicated by newly adding at least one bit (for example, 1-2 bits) to the DCI, and the RRC may be newly added signaling or multiplexing existing signaling. Any one of the first measurement band and the second measurement band may be dynamically configured or semi-statically configured by the network side device, and accordingly, the CSI measurement band indication information is semi-static signaling or dynamic signaling, but the embodiment of the present invention is not limited thereto.

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 (b)

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 (b)

Optionally, as another embodiment, the method 200 further includes:

s230, sending CSI reporting indication information to the first equipment, wherein the CSI reporting indication information is used for indicating the first equipment to report CSI;

s240, receiving a measurement result of the CSI measurement by the first device according to the CSI reporting indication information and the CSI measurement frequency band indication information.

The method for measuring CSI provided by the embodiment of the present invention will be described in more detail with reference to specific examples. Fig. 3 is a schematic diagram of a system band configuration according to an embodiment of the present invention. For 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, and the UE is served by the micro nodes, but is interfered by the macro nodes, and the macro nodes adopt dynamic node muting in the frequency domain to reduce interference to the UE served by the micro nodes. The first device is assumed to be UE, and the network side device is a base station corresponding to the micro node. As shown in fig. 3, the base station configures a first measurement frequency band and a second measurement frequency band for the UE, and ensures that the first measurement frequency band is a frequency band in which the macro node is silent, and the second measurement frequency band may include both a frequency band in which the macro node is silent and a frequency band in which the macro node is not silent. At this time, the UE measures wideband CSI on the first measurement band and performs subband CSI measurement according to subbands included in the second measurement band. Since the base station knows on the measurement subframes of the UE which bands the macro node mutes on the second measurement band and not on those bands, the base station also knows which of the subband CSI fed back by the UE are CSI corresponding to the subbands the macro node mutes and the subbands can be used for scheduling, but the embodiment of the invention is not limited thereto.

It should be noted that this example of fig. 3 is intended to aid one skilled in the art in better understanding embodiments of the present invention, and is not intended to limit the scope of embodiments of the present invention. From the example of fig. 3 given, it will be apparent to those skilled in the art that various equivalent modifications or variations can be made, and such modifications or variations are intended to be within the scope of the embodiments of the invention.

It should be understood that the sequence numbers of the above processes do not mean the order of execution, and the execution order of the processes should be determined by the functions and internal logic of the processes, and should not be construed as limiting the implementation process of the embodiments of the present invention.

The method for measuring CSI according to the embodiment of the present invention is described in detail above with reference to fig. 1 to 3, and the apparatus for measuring CSI according to the embodiment of the present invention will be described below with reference to fig. 4 to 7.

Fig. 4 shows a schematic flow chart of an apparatus 300 for measuring channel state information CSI according to an embodiment of the present invention, wherein the apparatus 300 may correspond to the first device in the above-mentioned method embodiment, as shown in fig. 4, the apparatus 300 comprises:

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

A first measurement module 320, configured to perform wideband CSI measurement on the first measurement frequency band determined by the determination module 310;

a second measurement module 330, 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.

Therefore, according to the device for measuring CSI in the embodiment of the present invention, the first device performs wideband CSI measurement on the first measurement frequency band with a bandwidth smaller than the downlink transmission bandwidth, and performs subband CSI measurement on the second measurement frequency band that does not completely overlap with the first measurement frequency band, so that measurement results of wideband CSI and subband CSI can be obtained, and the measurement results can be further reported to the network side device, so that the network side device can schedule the first device according to the measurement results reported by the first device, and therefore, compared with a scheme that the base station cannot obtain the CSI measurement results reported by the UE and performs scheduling, scheduling efficiency of the network side device can be improved, and system performance and user experience can be improved.

Optionally, the wideband CSI measurement comprises at least one of the following measurements: rank indication RI measurement, wideband channel quality indication CQI measurement, and wideband precoding indication PMI measurement.

The first measurement band is a portion of the second measurement band.

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

Alternatively, as another embodiment, the determining module 310 includes:

a first determining unit 311, configured to determine, according to the CSI measurement band indication information sent by the network side device, the first measurement band from at least two first candidate measurement bands; and/or

A second determining unit 312, configured to determine the second measurement band from at least two second candidate measurement bands according to the CSI measurement band indication information sent by the network side device.

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

A third determining unit 313, configured to determine the first measurement frequency band as a frequency band obtained after the measurement frequency band used for performing the wideband CSI measurement last time is adjusted according to the frequency band bandwidth corresponding to the first adjustment frequency band information; and/or

A fourth determining unit 314, configured to determine the second measurement frequency band as a frequency band obtained after adjusting the measurement frequency band used for performing the subband CSI measurement last time according to the frequency bandwidth corresponding to the second adjustment frequency band information.

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

Optionally, as another embodiment, the apparatus 300 further includes:

a receiving module 340, configured to receive CSI reporting indication information sent by a network side device before the first measuring module 320 performs wideband CSI measurement on the first measurement frequency band, 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 320 is specifically configured to perform wideband CSI measurement on the first measurement frequency band according to the CSI reporting indication information received by the receiving module 340;

Accordingly, the apparatus 300 further comprises: a reporting module 350, configured to report, to the network side device, a measurement result of the wideband CSI measurement performed by the first measurement module 320 and a measurement result of the subband CSI measurement performed by the second measurement module 330.

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 above and other operations and/or functions of each module in the apparatus 300 are respectively for implementing the corresponding flow of each method in fig. 1, and are not repeated herein for brevity.

Therefore, according to the device for measuring CSI in the embodiment of the present invention, the first device performs wideband CSI measurement on the first measurement frequency band with a bandwidth smaller than the downlink transmission bandwidth, and performs subband CSI measurement on the second measurement frequency band that does not completely overlap with the first measurement frequency band, so that measurement results of wideband CSI and subband CSI can be obtained, and the measurement results can be further reported to the network side device, so that the network side device can schedule the first device according to the measurement results reported by the first device, and therefore, compared with a scheme that the base station cannot obtain the CSI measurement results reported by the UE and performs scheduling, scheduling efficiency of the network side device can be improved, and system performance and user experience can be improved. Further, in the frequency domain dynamic interference control scenario, the first measurement frequency band may be a frequency band with stable interference, so that accuracy of a CSI measurement result obtained by the first device is higher, in addition, the first measurement frequency band is not completely overlapped with a second measurement frequency band in which subband CSI measurement is performed by the first device, so that the subband CSI measurement result of the first device includes information of more frequency bands, accuracy of the CSI measurement result of the first device is improved, meanwhile, comprehensiveness of the measurement result is maintained, scheduling efficiency of the network side device according to the CSI measurement result reported by the first device is improved, and system performance and user experience are improved; the network side equipment can know the interference information on each frequency band, so that the network side equipment can know which sub-band CSI measurement results reported by the UE can provide accurate information for scheduling, and the beneficial effects are more prominent under the condition that the first equipment only supports one CSI process.

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, where the apparatus 400 may be a network side device in the above method embodiment, as shown in fig. 5, and the apparatus 400 includes:

a determining module 410, configured to determine a CSI measurement frequency band used when the first device performs CSI measurement, where the CSI measurement frequency band includes at least one of the following frequency bands: a first measurement band for performing wideband CSI measurement and a second measurement band for performing subband CSI measurement, wherein a bandwidth of the first measurement band is smaller than a downlink transmission bandwidth and the first measurement band does not completely overlap the second measurement band;

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

The first measurement band is a portion of the second measurement band.

Alternatively, as another embodiment, the determining module 410 is specifically configured to:

determining a first measurement frequency band adopted when the first device performs RI measurement from at least two first candidate CSI measurement frequency bands of the first device; and/or

A second measurement band employed by the first device when making subband CSI measurements is determined from at least two second candidate CSI measurement bands for the first device.

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

the first adjustment frequency band information is used for indicating the first measurement frequency band to be the frequency band obtained after the first device adjusts the measurement frequency band used for carrying out the 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 for indicating the second measurement frequency band to be the frequency band obtained after the first device adjusts the measurement frequency band adopted by the last subband CSI measurement according to the frequency band bandwidth corresponding to the second adjustment frequency band information.

Optionally, as another embodiment, the sending module 420 is further configured to send CSI reporting indication information to the first device, where the CSI reporting indication information is used to indicate the first device to report CSI;

accordingly, the apparatus 400 further comprises: a receiving module 430, configured to receive a measurement result of CSI measurement by the first device according to the CSI report indication information and the CSI measurement band indication information sent by the sending module 420.

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 and other operations and/or functions of each module in the apparatus 400 are respectively for implementing the corresponding flow of each method in fig. 2, and are not repeated herein for brevity.

Fig. 6 shows a schematic flow chart of an apparatus 500 for measuring channel state information CSI according to an embodiment of the present invention, wherein the apparatus 500 may correspond to the first device in the above-mentioned method embodiment, as shown in fig. 6, the apparatus 500 comprises: a processor 510, a memory 520, and a bus system 530. Wherein the processor 510 and the memory 520 are connected by a bus system 530, the memory 520 is configured to store instructions, the processor 510 is configured to invoke the instructions stored in the memory 520 by the bus system 530, in particular, the processor 510 is configured to determine a first measurement frequency band and a second measurement frequency band, the first measurement frequency band is configured to perform wideband CSI measurement, the second measurement frequency band is configured to perform subband CSI measurement, wherein a bandwidth of the first measurement frequency band is smaller than a downlink transmission bandwidth and the first measurement frequency band does not completely overlap the second measurement frequency band; performing wideband CSI measurements on the first measurement frequency band; and performing subband CSI measurements on the second measurement frequency band based on the measurement results obtained by the wideband CSI measurements.

It should be appreciated that in embodiments of the present invention, the processor 510 may be a central processing unit (Central Processing Unit, simply "CPU"), and the processor 510 may also be other general purpose processors, digital Signal Processors (DSPs), application Specific Integrated Circuits (ASICs), off-the-shelf programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The memory 520 may include read only memory and random access memory, and provides instructions and data to the processor 510. A portion of memory 520 may also include nonvolatile random access memory. For example, the memory 520 may also store information of the device type.

The bus system 530 may include a power bus, a control bus, a status signal bus, and the like, in addition to a data bus. For clarity of illustration, however, the various buses are labeled in the drawing as bus system 530.

In implementation, the steps of the above method may be performed by integrated logic circuitry in hardware or instructions in software in processor 510. The steps of a method disclosed in connection with the embodiments of the present invention may be embodied directly in a hardware processor for execution, or in a combination of hardware and software modules in the processor for execution. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory 520, and the processor 510 reads information in the memory 520, and in combination with its hardware, performs the steps of the above method. To avoid repetition, a detailed description is not provided herein.

The first measurement band is a portion of the second measurement band.

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 CSI measurement frequency band indication information sent by the network side device.

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

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 equipment; and/or

And determining 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 equipment.

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

determining the first measurement frequency band as a frequency band obtained after the measurement frequency band adopted by the last wideband CSI measurement is adjusted according to the frequency band bandwidth corresponding to the first adjustment frequency band information; and/or

And determining the second measurement frequency band as a frequency band obtained after the measurement frequency band adopted by the last subband CSI measurement is adjusted according to the frequency band width corresponding to the second adjustment frequency band information.

Optionally, as another embodiment, the apparatus 500 further includes:

a receiver 540, configured to receive CSI reporting indication information sent by a network side device before the processor 510 performs wideband CSI measurement on the first measurement frequency band, where the CSI reporting indication information is used to instruct the first device to report CSI to the network side device;

Correspondingly, the processor 510 is specifically configured to perform wideband CSI measurement on the first measurement frequency band according to the CSI reporting indication information received by the receiver 540;

the apparatus 300 further comprises: and a transmitter 550, configured to report, to the network side device, a measurement result of the wideband CSI measurement and the subband CSI measurement performed by the processor 510.

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 and other operations and/or functions of each module in the apparatus 500 are respectively for implementing the corresponding flow of each method in fig. 1, and are not repeated herein for brevity.

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, where the apparatus 600 may be a network side device in the above method embodiment, as shown in fig. 7, and the apparatus 600 includes: processor 610, memory 620, bus system 630, and transmitter 640. Wherein the processor 610, the memory 620 and the transmitter 640 are connected through a bus system 630, the memory 620 is configured to store instructions, the processor 610 is configured to invoke the instructions stored in the memory 620 through the bus system 630, and specifically, the processor 610 is configured to determine a CSI measurement frequency band used when the first device performs CSI measurement, where the CSI measurement frequency band includes at least one of the following frequency bands: a first measurement band for performing wideband CSI measurement and a second measurement band for performing subband CSI measurement, wherein a bandwidth of the first measurement band is smaller than a downlink transmission bandwidth and the first measurement band does not completely overlap the second measurement band; the transmitter 640 is configured to transmit CSI measurement band indicating information indicating the CSI measurement band determined by the processor 610 to the first device.

It should be appreciated that in embodiments of the present invention, the processor 610 may be a central processing unit (Central Processing Unit, simply "CPU"), the processor 610 may also be other general purpose processors, digital Signal Processors (DSPs), application Specific Integrated Circuits (ASICs), off-the-shelf programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

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

The bus system 630 may include a power bus, a control bus, a status signal bus, and the like in addition to a data bus. But for clarity of illustration, the various buses are labeled in the figure as bus system 630.

In implementation, the steps of the above method may be performed by integrated logic circuitry in hardware or instructions in software in the processor 610. The steps of a method disclosed in connection with the embodiments of the present invention may be embodied directly in a hardware processor for execution, or in a combination of hardware and software modules in the processor for execution. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in the memory 620, and the processor 610 reads information in the memory 620 and, in combination with its hardware, performs the steps of the method described above. To avoid repetition, a detailed description is not provided herein.

The first measurement band is a portion of the second measurement band.

Alternatively, as another embodiment, the processor 610 is specifically configured to:

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

accordingly, the apparatus 600 further comprises: and a receiver 650, configured to receive a measurement result of CSI measurement by the first device according to the CSI report indication information and the CSI measurement band indication information sent by the transmitter 640.

The apparatus 600 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 and other operations and/or functions of each module in the apparatus 600 are respectively for implementing the corresponding flow of each method in fig. 2, and are not repeated herein for brevity.

It should be understood that, in the embodiment of the present invention, the term "and/or" is merely an association relationship describing the association object, which means that three relationships may exist. For example, a and/or B may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

Those of ordinary skill in the art will appreciate that the various method steps and elements described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the steps and components of the various embodiments have been described generally in terms of functionality in the foregoing description to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Those of ordinary skill in the art may implement the described functionality using different approaches for each particular application, but such implementation is not considered to be beyond the scope of the present invention.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. In addition, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices, or elements, or may be an electrical, mechanical, or other form of connection.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiment of the present invention.

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

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention is essentially or a part contributing to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (abbreviated as "ROM"), a random access Memory (Random Access Memory) and various media capable of storing program codes such as a magnetic disk or an optical disk.

While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.

Claims

1. A method for measuring channel state information, CSI, comprising:

determining at least one of a first measurement frequency band and a second measurement frequency band according to the indication information, wherein the first measurement frequency band is used for carrying out wideband CSI measurement, and the second measurement frequency band is used for carrying out 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 not completely overlapped;

performing wideband CSI measurement on the first measurement frequency band;

performing subband CSI measurements on the second measurement frequency band;

wherein the determining at least one of the first measurement frequency band and the second measurement frequency band according to the indication information includes:

determining the first measurement frequency band from at least two first candidate measurement frequency bands according to the indication information; and/or

Determining the second measurement frequency band from at least two second candidate measurement frequency bands according to the indication information;

and reporting the measurement result of the broadband CSI measurement and/or the measurement result of the subband CSI measurement.

2. The method according to claim 1, characterized in that:

the indication information is carried in higher layer signaling.

3. The method according to claim 2, characterized in that:

the higher layer signaling is radio resource control RRC signaling.

4. A method according to any of claims 1-3, characterized in that the wideband CSI measurement comprises at least one of the following measurements: rank indication RI measurement, wideband channel quality indication CQI measurement, and wideband precoding indication PMI measurement.

5. A method according to any of claims 1-3, characterized in that the first measurement band does not completely overlap with the second measurement band, comprising:

The first measurement band is part of the second measurement band.

6. The method according to any of claims 1-5, wherein, if at least one CSI process is configured,

the at least one CSI process corresponds to the same first measurement frequency band and the same second measurement frequency band; or (b)

The at least one CSI process corresponds to the same first measurement frequency band and a first CSI process and a second CSI process of the at least one CSI process correspond to different second measurement frequency bands; or (b)

The at least one CSI process corresponds to the same second measurement frequency band and a first CSI process and a second CSI process of the at least one CSI process correspond to different first measurement frequency bands.

7. The method according to any one of claims 1-5, wherein, if at least two sets of subframes are configured,

the at least two subframe sets correspond to the same first measurement frequency band and the same second measurement frequency band; or (b)

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 (b)

The at least two subframe sets correspond to the same second measurement frequency band and a first subframe set and a second subframe set of the at least two subframe sets correspond to different first measurement frequency bands.

8. The method according to any of claims 1-5, wherein prior to making wideband CSI measurements on the first measurement frequency band, the method further comprises:

receiving CSI reporting indication information sent by network side equipment, wherein the CSI reporting indication information is used for indicating to report CSI to the network side equipment;

the performing wideband CSI measurement on the first measurement frequency band includes:

And carrying out wideband CSI measurement on the first measurement frequency band according to the CSI reporting indication information.

9. A method for measuring channel state information, CSI, comprising:

determining at least one of a first measurement frequency band and a second measurement frequency band, wherein the first measurement frequency band is used for a first device to perform wideband CSI measurement, the second measurement frequency band is used for the first device to perform sub-band CSI measurement, the bandwidth of the first measurement frequency band is smaller than a downlink transmission bandwidth, and the first measurement frequency band and the second measurement frequency band are not completely overlapped;

transmitting indication information to the first device, wherein the indication information is used for indicating at least one of the first measurement frequency band and the second measurement frequency band;

wherein the determining at least one of the first measurement frequency band and the second measurement frequency band comprises:

determining a first measurement band for wideband CSI measurement by the first device from at least two first candidate CSI measurement bands; and/or

Determining a second measurement band for subband CSI measurement by the first device from at least two second candidate CSI measurement bands;

and receiving a measurement result of the broadband CSI measurement and/or a measurement result of the subband CSI measurement.

10. The method according to claim 9, wherein:

the indication information is carried in higher layer signaling.

11. The method according to claim 10, wherein:

the higher layer signaling is radio resource control RRC signaling.

12. The method according to any of claims 9-11, wherein the wideband CSI measurement comprises at least one of the following measurements: rank indication RI measurement, wideband channel quality indication CQI measurement, and wideband precoding indication PMI measurement.

13. The method according to any of claims 9-11, wherein the first measurement band does not completely overlap with the second measurement band, comprising:

The first measurement band is part of the second measurement band.

14. The method according to any of claims 9-13, wherein, if the first device is configured with at least one CSI process,

15. The method according to any of claims 9-13, wherein, if the first device is configured with at least two sets of subframes,

16. The method according to any one of claims 9-13, wherein the method further comprises:

and sending CSI reporting indication information to the first equipment, wherein the CSI reporting indication information is used for indicating the first equipment to report the CSI.

17. An apparatus for measuring channel state information CSI, comprising:

a determining module, configured to determine at least one of a first measurement frequency band and a second measurement frequency band according to the indication information, where the first measurement frequency band is used for performing wideband CSI measurement, and the second measurement frequency band is used for performing subband CSI measurement;

a first measurement module, configured to perform wideband CSI measurement on the first measurement frequency band;

a second measurement module, configured to perform subband CSI measurement on the second measurement frequency band;

wherein, the determining module is used for:

and the reporting module is used for reporting the measurement result of the broadband CSI measurement and/or the measurement result of the subband CSI measurement.

18. The apparatus according to claim 17, wherein:

the indication information is carried in higher layer signaling.

19. The apparatus according to claim 18, wherein:

the higher layer signaling is radio resource control RRC signaling.

20. The apparatus according to any of claims 17-19, wherein the wideband CSI measurement comprises at least one of: rank indication RI measurement, wideband channel quality indication CQI measurement, and wideband precoding indication PMI measurement.

21. The apparatus of any of claims 17-19, wherein the first measurement band does not completely overlap with the second measurement band, comprising:

The first measurement band is part of the second measurement band.

22. The apparatus of any of claims 17-21, wherein, if at least one CSI process is configured,

23. The apparatus according to any of claims 17-21, wherein, if at least two sets of subframes are configured,

24. The apparatus according to any one of claims 17-21, wherein the apparatus further comprises:

the receiving module is used for receiving CSI reporting indication information sent by the network side equipment before the first measuring module performs broadband CSI measurement on the first measuring frequency band, wherein the CSI reporting indication information is used for indicating to report CSI to the network side equipment;

the first measurement module is specifically configured to perform wideband CSI measurement on the first measurement frequency band according to the CSI reporting indication information received by the receiving module.

25. An apparatus for measuring channel state information CSI, comprising:

a determining module, configured to determine at least one of a first measurement frequency band and a second measurement frequency band, where the first measurement frequency band is used for a first device to perform wideband CSI measurement, and the second measurement frequency band is used for the first device to perform subband CSI measurement, where a bandwidth of the first measurement frequency band is less than a downlink transmission bandwidth and the first measurement frequency band does not completely overlap with the second measurement frequency band;

a transmitting module, configured to transmit, to the first device, indication information, where the indication information is used to indicate at least one of the first measurement frequency band and the second measurement frequency band;

wherein, the determining module is used for:

determining a first measurement band for wideband CSI measurement by the first device from at least two first candidate CSI measurement bands of the first device; and/or

Determining a second measurement band for subband CSI measurement by the first device from at least two second candidate CSI measurement bands of the first device;

and the receiving module is used for receiving the measurement result of the broadband CSI measurement and/or the measurement result of the subband CSI measurement.

26. The apparatus according to claim 25, wherein:

the indication information is carried in higher layer signaling.

27. The apparatus according to claim 26, wherein:

the higher layer signaling is radio resource control RRC signaling.

28. The apparatus of any of claims 25-27, wherein the wideband CSI measurement comprises at least one of: rank indication RI measurement, wideband channel quality indication CQI measurement, and wideband precoding indication PMI measurement.

29. The apparatus of any of claims 25-27, wherein the first measurement band does not completely overlap with the second measurement band, comprising:

The first measurement band is part of the second measurement band.

30. The apparatus of any of claims 25-29, wherein, if the first device is configured with at least one CSI process,

31. The apparatus of any one of claims 25-29, wherein if the first device is configured with at least two sets of subframes,

32. The apparatus of any one of claims 25-29, wherein the sending module is further configured to send CSI reporting indication information to the first device, where the CSI reporting indication information is configured to instruct the first device to report CSI.

33. A computer readable storage medium having instructions stored thereon which, when run on a computer, cause the computer to perform the method of any of claims 1-8.

34. A computer readable storage medium having instructions stored thereon which, when run on a computer, cause the computer to perform the method of any of claims 9-16.

35. An apparatus comprising a processor and a memory, the memory to store instructions, the processor to invoke and execute the instructions to implement the method of any of claims 1-8.

36. An apparatus comprising a processor and a memory, the memory to store instructions, the processor to invoke and execute the instructions to implement the method of any of claims 9-16.