WO2015100619A1

WO2015100619A1 - Method and apparatus for measuring channel state information

Info

Publication number: WO2015100619A1
Application number: PCT/CN2013/091122
Authority: WO
Inventors: 孙静原; 薛丽霞
Original assignee: 华为技术有限公司
Priority date: 2013-12-31
Filing date: 2013-12-31
Publication date: 2015-07-09
Also published as: CN110351869A; CN104995857A; CN104995857B; CN110351870B; CN110351869B; CN110351870A

Abstract

Disclosed are a method and an apparatus for measuring CSI. The method comprises: a first device determining a first measurement frequency band and a second measurement frequency band, the first measurement frequency band being used for performing wideband CSI measurement, the second measurement frequency band being a used for performing sub-band CSI measurement, and a bandwidth of the first measurement frequency band being smaller than a downlink transmission bandwidth and the first measurement frequency band and the second measurement frequency band being not fully overlapped; performing wideband CSI measurement on the first measurement frequency band; and performing sub-band CSI measurement on the second measurement frequency band according a measurement result obtained in the wideband CSI measurement. According to the method and the apparatus for measuring CSI in the embodiments of the present invention, compared with a solution in which scheduling is performed when a base station cannot obtain a CSI measurement result reported by a UE, the method and the apparatus can improve the scheduling efficiency of a network side device and improve system performance and user experience.

Description

Method and apparatus for measuring channel state information

Embodiments of the present invention relate to the field of communications and, more particularly, to methods and apparatus for measuring channel state information. Background technique

In the wireless communication system, in order to improve the scheduling efficiency of the base station, the user equipment (User Equipment, UE) needs to measure the channel state information (CSI), and report the measurement result of the CSI measurement to the base station, so that the base station can The resource scheduling is performed according to the CSI measurement result reported by the UE, where the CSI measurement result reported by the UE includes a wideband CSI and a sub-band CSI, where the wideband CSI is a CSI obtained by the UE measuring the entire downlink system bandwidth, and the sub-band CSI is The UE separately measures the CSI obtained by measuring part or all of the subbands included in the entire downlink system bandwidth. Summary of the invention

Embodiments of the present invention provide a method and apparatus for measuring CSI, which can also implement measurement of wideband CSI and subband CSI.

In a first aspect, a method for measuring CSI is provided, the method comprising: determining, by a first device, a first measurement band and a second measurement band, the first measurement band being used for performing a wideband CSI measurement, and the second measurement band is used for Performing sub-band 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 broadband CSI measurement on the first measurement frequency band; The CSI measurement obtains the measurement result, and the sub-band CSI measurement is performed on the second measurement band.

In conjunction with the first aspect, in a first possible implementation, 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 indicating PMI measurement.

In combination with the foregoing possible implementation manner, in a second possible implementation, the first measurement frequency band does not completely overlap the second measurement frequency band, and the method includes: the first measurement frequency band does not overlap with the second measurement frequency band at all; or A portion of the first measurement band overlaps with a portion of the second measurement band; or the first measurement band is a portion of the second measurement band. In combination with the foregoing possible implementation manner, in a third possible implementation manner, the determining the first measurement frequency band and the second measurement frequency band, including: determining the first measurement frequency band and the CSI measurement frequency band indication information sent by the network side device At least one of the second measurement bands.

With reference to the third possible implementation manner, in a fourth possible implementation manner, the determining, according to the CSI measurement band indication information sent by the network side device, determining at least one of the first measurement frequency band and the second measurement frequency band, including Determining the first measurement frequency band from the at least two first candidate measurement frequency bands according to the CSI measurement frequency band indication information sent by the network side device; and/or according to the CSI measurement frequency band indication information sent by the network side device, The second measurement band is determined in at least two second candidate measurement bands.

With reference to the third possible implementation manner, in a fifth possible implementation, the CSI measurement band indication information includes at least one of the following information: first adjustment band information and second adjustment band information, according to the network side Determining at least one of the first measurement band and the second measurement band by the CSI measurement band indication information sent by the device, including: determining that the first measurement band is the last time band bandwidth corresponding to the first adjustment band information a frequency band obtained by adjusting a measurement band used for wideband CSI measurement; and/or determining that the second measurement band is a measurement band used for performing a sub-band CSI measurement based on a bandwidth corresponding to the second adjusted band information The frequency band obtained after the adjustment.

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

In combination with 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 band and the first CSI process and the second CSI process in the at least one CSI process correspond to different second measurement bands; or the at least one CSI process corresponds to the same second measurement band and The first CSI process and the second CSI process in the at least one CSI process correspond to different first measurement bands.

With reference to the foregoing possible implementation manners, in an eighth possible implementation manner, if the UE is configured with at least two subframe sets, the at least two subframe sets correspond to the same first measurement frequency band and the same second measurement frequency band; 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 of the at least two subframe sets correspond to different second measurement bands; or the at least two subframe sets correspond to The same second measurement band and the at least two subframe sets The first subframe set and the second subframe set correspond to different first measurement bands.

In combination with the foregoing possible implementation manner, in a ninth possible implementation manner, before the performing the broadband CSI measurement on the first measurement frequency band, the method further includes: receiving CSI reporting indication information sent by the network side device, where the CSI reporting indication The information is used to indicate that the first device reports the CSI to the network side device. The performing the CSI measurement on the first measurement frequency band includes: performing broadband CSI measurement on the first measurement frequency band according to the CSI reporting indication information;

The method further includes: measuring the measurement of the wideband CSI and the measurement result of the sub-band CSI measurement on the network side device.

In a second aspect, a method for measuring channel state information CSI is provided, including: determining, by a network side device, a CSI measurement frequency band used by a first device to perform 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 and the second measurement band Not completely overlapping; transmitting CSI measurement band indication information to the first device, the CSI measurement band indication information being used to indicate the CSI measurement band.

In conjunction with the second aspect, in a first possible implementation, the wideband CSI measurement comprises at least one of the following: rank indication RI measurement, wideband channel quality indication CQI measurement, and wideband precoding indicating PMI measurement.

In combination with the foregoing possible implementation manner, in a second possible implementation, the first measurement frequency band does not completely overlap the second measurement frequency band, and the method includes: the first measurement frequency band does not overlap with the second measurement frequency band at all; or A portion of the first measurement band overlaps with a portion of the second measurement band; or the first measurement band is a portion of the second measurement band.

In combination with the foregoing possible implementation manners, in a third possible implementation manner, the determining, by the first device, the CSI measurement frequency band used for the CSI measurement includes: from the at least two first candidate CSI measurement frequency bands of the first device Determining a first measurement band used by the first device to perform RI measurement; and/or determining, from the at least two second candidate CSI measurement bands of the first device, a second used by the first device to perform sub-band CSI measurement Measuring frequency band.

In combination with the foregoing possible implementation manner, in a fourth possible implementation, the CSI measurement band indication information includes at least one of the following information: first adjustment band information and second adjustment band information, where the first adjustment The frequency band information is used to indicate that the first measurement frequency band is used by the first device to perform the broadband CSI measurement according to the bandwidth of the frequency band corresponding to the first adjusted frequency band information. a frequency band obtained by adjusting the measurement frequency band, wherein the second adjustment frequency band information is used to indicate that the second measurement frequency band is the last time the sub-band CSI measurement is performed by the first device according to the frequency band bandwidth corresponding to the second adjusted frequency band information. The frequency band obtained by adjusting the measured frequency band.

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

In combination with 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 band and the first CSI process and the second CSI process in the at least one CSI process correspond to different second measurement bands; or the at least one CSI process corresponds to the same second measurement band and The first CSI process and the second CSI process in the at least one CSI process correspond to different first measurement bands.

With reference to the foregoing possible implementation manners, in a seventh possible implementation manner, if the UE is configured with at least two subframe sets, the at least two subframe sets correspond to the same first measurement frequency band and the same second measurement frequency band; 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 of the at least two subframe sets correspond to different second measurement bands; or the at least two subframe sets correspond to The same second measurement band and the first subframe set and the second subframe set of the at least two subframe sets correspond to different first measurement bands.

With reference to the foregoing possible implementation manner, in an eighth possible implementation manner, the method further includes: sending, to the first device, the indication information on the CSI, where the indication information is used to indicate that the first device is reported. The CSI receives the measurement result of the CSI measurement by the first device according to the CSI reporting indication information and the CSI measurement band indication information.

In a third aspect, an apparatus for measuring channel state information CSI is provided, including: 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 a wideband CSI measurement, where The second measurement band is used to perform sub-band CSI measurement, where the bandwidth of the first measurement band is smaller than the downlink transmission bandwidth and the first measurement band does not completely overlap with the second measurement band; the first measurement module is configured to determine Broadband determined on the first measurement band determined by the module

CSI measurement; a second measurement module, configured to perform sub-band CSI measurement on the second measurement frequency band according to the measurement result obtained by the first measurement module performing the wideband CSI measurement.

In conjunction with the third aspect, in a first possible implementation, the wideband CSI measurement comprises at least one of the following: a rank indication RI measurement, a wideband channel quality indicator CQI measurement, and a wideband precoding indicator PMI measurement. In combination with the foregoing possible implementation manner, in a second possible implementation, the first measurement frequency band does not completely overlap the second measurement frequency band, and the method includes: the first measurement frequency band does not overlap with the second measurement frequency band at all; or A portion of the first measurement band overlaps with a portion of the second measurement band; or the first measurement band is a portion of the second measurement band.

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

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

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 band information and second adjustment band information, where the determining module includes a third determining unit, configured to determine that the first measurement frequency band is a frequency band obtained by adjusting a measurement frequency band used for performing a wideband CSI measurement according to a frequency band bandwidth corresponding to the first adjusted frequency band information; and/or And a determining unit, configured to determine that the second measurement frequency band is a frequency band obtained by adjusting a measurement frequency band used for the last sub-band CSI measurement according to a bandwidth corresponding to the second adjusted frequency band information.

With reference to the foregoing possible implementation manners, in an eighth possible implementation manner, if the UE is configured with at least two subframe sets, the at least two subframe sets correspond to the same first measurement frequency band and the same second measurement frequency band; Or the at least two subframe sets correspond to the same first measurement band and the The first subframe set and the second subframe set of the less than two subframe sets correspond to different second measurement bands; or the at least two subframe sets correspond to the same second measurement band and the second of the at least two subframe sets A set of subframes and a set of second subframes correspond to different first measurement bands.

In combination with the foregoing possible implementation manner, in a ninth possible implementation manner, the apparatus further includes: a receiving module, configured to receive the network side device before the first measurement module performs the broadband CSI measurement on the first measurement frequency band Sending CSI reporting indication information, the CSI reporting indication information is used to indicate that the first device reports CSI to the network side device; the first measurement module is specifically configured to: according to the CSI reporting indication information received by the receiving module, Performing a wideband CSI measurement on a measurement band; the device further includes: a reporting module, configured to report, to the network side device, the first measurement module to perform measurement of the wideband CSI measurement and the second measurement module to perform the subband CSI measurement Measurement results.

The fourth aspect provides an apparatus for measuring channel state information CSI, including: a determining module, configured to determine a CSI measurement frequency band used by a first device to perform CSI measurement, where the CSI measurement frequency band includes at least one of the following frequency bands. a first measurement frequency band for performing wideband CSI measurement and a second measurement frequency band for performing sub-band CSI measurement, wherein a bandwidth of the first measurement frequency band is smaller than a downlink transmission bandwidth and the first measurement frequency band and the second The measurement frequency band does not completely overlap; the sending module is configured to send CSI measurement frequency band indication information to the first device, where the CSI measurement frequency band indication information is used to indicate the CSI measurement frequency band determined by the determining module.

In conjunction with the fourth aspect, in a first possible implementation, the wideband CSI measurement comprises at least one of the following: rank indication RI measurement, wideband channel quality indication CQI measurement, and wideband precoding indicating PMI measurement.

In combination with the foregoing possible implementation manner, in a third possible implementation manner, the determining module is specifically configured to: when determining, by using the at least two first candidate CSI measurement bands of the first device, the first device to perform RI measurement a first measurement band; and/or determining, from the at least two second candidate CSI measurement bands of the first device, a second measurement band employed by the first device to perform sub-band CSI measurement.

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

In combination with 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 device further includes: a receiving module, configured to receive a measurement result of the CSI measurement performed by the first device according to the CSI reporting indication information and the CSI measurement band indication information sent by the sending module.

Based on the foregoing technical solution, a method and apparatus for measuring CSI provided by an embodiment of the present invention, where a first device performs a wideband CSI measurement on a first measurement frequency band having a bandwidth smaller than a downlink transmission bandwidth, and does not completely overlap with the first measurement frequency band. The sub-band CSI measurement is performed on the second measurement frequency band, and the measurement result of the broadband CSI and the sub-band CSI can be obtained, and the measurement result can be further reported to the network side device, so that the network side device can report according to the first device. The measurement result is scheduled by the first device, so that the base station cannot obtain the CSI measurement result reported by the UE. The solution can improve the scheduling efficiency of the network side device and improve system performance and user experience. DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings to be used in the embodiments of the present invention or the description of the prior art will be briefly described below. Obviously, the drawings described below are merely the present invention. Some of the embodiments can be obtained by those skilled in the art from the drawings without any creative work.

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

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

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

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

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

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

Figure 7 is a schematic block diagram of an apparatus for measuring CSI in accordance with still another embodiment of the present invention. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are a part of the embodiments of the present invention, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without making creative labor are within the scope of the present invention.

It should be understood that the technical solutions of the embodiments of the present invention can be applied to various communication systems, such as: Global System of Mobile communication ("GSM") system, Code Division Multiple Access (Code Division Multiple Access) Called "CDMA" system, Wideband Code Division Multiple Access ("WCDMA") system, General Packet Radio Service ("General Packet Radio Service"), Long Term Evolution ( Long Term Evolution, called "LTE" system, LTE frequency division duplex (Frequency Division Duplex) system, LTE time division duplex (Time Division Duplex, "TDD"), general purpose The mobile communication system (Universal Mobile Telecommunication System, called "UMTS"), the Worldwide Interoperability for Microwave Access ("Wireless" called "WiMAX") communication system.

It should also be understood that in the embodiment of the present invention, the user equipment (User Equipment, the tube is called "UE") It can be called a terminal, a mobile station (Mobile Station, called "MS"), a mobile terminal (Mobile Terminal), etc., and the user equipment can pass through a radio access network (Radio Access Network, called "RAN"" ) communicating with one or more core networks, for example, the user device may be a mobile phone (or "cellular" phone), a computer with a mobile terminal, etc., for example, the user device may also be portable, pocket, handheld Mobile computers built into the computer, or in-vehicle, that exchange voice and/or data with the wireless 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, called "BTS") in GSM or CDMA, or a base station (NodeB) in WCDMA, or may be in LTE. The evolved base station (evolved Node B, referred to as "eNB" or "e-NodeB") is not limited in the present invention.

The method for measuring CSI and the device for the measurement of the CSI are mainly applied to the scenario of performing the wideband CSI measurement and the sub-band CSI measurement on one carrier, but can also be applied to other scenarios, which is not limited by the embodiment of the present invention.

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

S110. The first device determines a first measurement frequency band for performing a wideband CSI measurement, and a second measurement frequency band, where the second measurement frequency band is used for performing subband CSI measurement, where the bandwidth of the first measurement frequency band is It is smaller than the downlink transmission bandwidth and the first measurement band does not completely overlap with the second measurement band.

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 downlink transmission bandwidth between the at least one serving cell and the UE of the UE, where the performing The downlink transmission bandwidth 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 present invention is not limited thereto.

The first measurement frequency band is used for performing wideband CSI measurement. Optionally, the wideband CSI measurement may include at least one of the following measurements: Rank Indicator (RI) measurement, wideband precoding matrix indication (Pre-coding Matrix) Indicator, PMI) Measurement and Wideband Channel Quality Indicator (CQI) measurements, correspondingly, the first measurement band is used to perform at least one of the following measurements: RI measurement, wideband PMI measurement, and wideband CQI measurement. Preferably, the first measurement frequency band can be used for performing RI measurement and/or wideband PMI measurement, but the embodiment of the present invention Not limited to this.

The second measurement band is used to perform sub-band CSI measurements, wherein the sub-band CSI measurement can include at least one of the following measurements: sub-band PMI measurement and sub-band CQI measurement. Optionally, the second measurement frequency band may include at least two sub-bands, and the second measurement frequency band may be part of a downlink system bandwidth or a downlink system bandwidth, but the embodiment of the present invention is not limited thereto.

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

S120, performing broadband CSI measurement on the first measurement frequency band.

Performing the broadband PMI measurement on the first measurement frequency band may refer to selecting the broadband PMI from the codebook when the first set downlink transmission is on the first measurement frequency band, and the selecting may include the first device according to the first Selecting a channel to be measured on a measurement band; performing wideband CQI measurement on the first measurement band may mean that the first device calculates a wideband CQI when the downlink transmission is on the first measurement band; Performing the RI measurement on the measurement band may mean that the first set downlink transmission obtains RI or obtains RI and PMI when the first measurement band is used, but the embodiment of the present invention is not limited thereto.

Optionally, the UE performing the wideband CSI measurement may be an instantaneous measurement, for example, performing measurement on one subframe, or the UE performing broadband CSI measurement on multiple subframes and performing statistical processing on the measurement results on the multiple subframes. However, embodiments of the invention are not limited thereto.

S130. Perform sub-band CSI measurement on the second measurement frequency band according to the measurement result obtained by the wide-band CSI measurement.

The second measurement frequency band may include multiple sub-bands. Correspondingly, the first device performs sub-band CSI measurement on the second measurement frequency band, and may include multiple sub-bands included by the first device in the second measurement frequency band. Subband CSI measurements are made on at least one of the subbands. The first device may perform sub-band CSI measurement on the second measurement band according to the measurement result of the RI measurement and/or the wideband PMI measurement; or perform the sub-band on the second measurement band according to the measurement result of the wide-band CQI measurement The CSI measurement is carried out, but the embodiment of the invention is not limited thereto.

Optionally, the sub-band CSI measurement performed by the UE may be an instantaneous measurement, for example, sub-band CSI measurement is performed on one subframe, but the embodiment of the present invention is not limited thereto.

Therefore, according to the method for measuring CSI according to an embodiment of the present invention, the first device performs wideband CSI measurement on a first measurement frequency band having a bandwidth smaller than a downlink transmission bandwidth, and is in a second measurement frequency band that does not completely overlap with the first measurement frequency band. Perform sub-band CSI measurement on top to obtain wideband CSI and subband The measurement result of the CSI is further reported to the network side device, so that the network side device can schedule the first device according to the measurement result reported by the first device, so that the UE cannot be reported relative to the base station. The scheduling of the CSI measurement results can improve the scheduling efficiency of the network side device and improve system performance and user experience.

When the present invention is applied to a frequency domain dynamic interference control scenario, for example, the system adopts technologies such as dynamic node silence, dynamic power control, or dynamic interference coordination (such as interference direction coordination) in the frequency domain. In the prior art, the first The device performs wideband CSI and subband CSI measurements on the entire downlink system bandwidth. However, because the interference received in different frequency bands of the entire downlink system bandwidth is different, the wideband CSI measurement on the entire downlink system bandwidth may cause the broadband CSI to be inaccurate. Inaccurate measurement results of the wideband CSI may further result in inaccurate measurement results of the sub-band CSI, thereby reducing the efficiency of the base station scheduling based on the CSI measurement results reported by the UE, and reducing system performance and user experience. In the embodiment of the present invention, optionally, the first device performs interference on the first measurement frequency band of the wideband CSI measurement, that is, the first measurement frequency band may be a frequency band with relatively stable interference, specifically, the first measurement The interference fluctuation in the frequency band may be lower than a certain threshold, and the threshold may be pre-defined or pre-configured by the 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 first measurement frequency band is mainly The transmission mode adopted by the interfering cell does not change or the change of the transmission mode conforms to a preset condition. Optionally, the preset condition may include a change of the transmission mode between different elements in the preset transmission mode set, and the like; or The first measurement frequency band is a frequency band that is not changed by the transmission mode of the primary interference cell, where the transmission mode may include unicast or multicast, and the like, and the embodiment of the present invention is not limited thereto; and the second measurement frequency band may include The frequency band in which the interference is unstable, that is, the frequency band including the dynamic change of the interference. In this way, the accuracy of the wideband CSI measurement obtained by the first device is higher than that of the prior art, and the first measurement frequency band does not completely overlap with the second measurement frequency band of the first device performing sub-band CSI measurement. And enabling the sub-band CSI measurement result of the first device to include information of more frequency bands, thereby maintaining the comprehensiveness of the measurement result while improving the accuracy of the CSI measurement result of the first device, and improving the network side device according to The CSI measurement result reported by the first device performs scheduling efficiency, improving system performance and user experience.

In the embodiment of the present invention, the first measurement frequency band is a part of a downlink system bandwidth, and the second measurement frequency band may be part of a downlink system bandwidth or a downlink system bandwidth, and the first measurement frequency band and the second measurement frequency band are incomplete. The bandwidth of the first measurement band may be smaller than the bandwidth of the second measurement band, so that the measurement result of the sub-band CSI measurement by the first device on the second measurement band may include more frequency bands. Information that helps the network side device according to the first The CSI measurement result of a device is scheduled. For example, if the downlink system bandwidth is 10 MHz, the bandwidth of the first measurement band of the first device may be 5 MHz, and the bandwidth of the second measurement band may be 7 MHz; 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 (PRBs), then the first The measurement band may include 10 PRBs, and the second measurement band may include 20 PRBs, but embodiments of the present invention are not limited thereto.

Optionally, the first measurement frequency band does not completely overlap with the second measurement frequency band, and the method includes: the first measurement frequency band does not overlap with the second measurement frequency band at all; or

A portion of the first measurement band overlaps with a portion of the second measurement band; or the first measurement band is a portion of the second measurement band.

The first measurement frequency band may not overlap with the second measurement frequency band at all, that is, the first measurement frequency band and the second measurement frequency band have no intersection in the frequency domain; some frequency bands in the first measurement frequency band may also be a portion of the second measurement band overlaps, that is, the first measurement band and the second measurement band have an intersection in the frequency domain, and the intersection is a subset of the first measurement band and the second measurement band; optionally The first measurement frequency band may also be a subset of the second measurement frequency band. Preferably, the first measurement frequency band may be a frequency band with relatively stable interference, and the second measurement frequency band may include a frequency band and interference with relatively stable interference. The dynamically changing frequency band, the embodiment of the present invention is not limited thereto.

The first device may determine the first measurement band and the second measurement band in a plurality of manners. Optionally, at least one of the first measurement band and the second measurement band may be predefined; A device may also determine the first measurement band and/or the second measurement band by blindly detecting interference stability. For example, the first device will use a more stable frequency band as the first measurement band, and the entire downlink. The system bandwidth is determined as the second measurement frequency band; the at least one of the first measurement frequency band and the second measurement frequency band may also be determined according to the indication information of the network side device, where the indication information is used to indicate the first The measurement band used when the device performs CSI measurement, but the embodiment of the present invention is not limited thereto.

Optionally, S110, determining the first measurement band and the second measurement band, including:

S110. The at least one of the first measurement band and the second measurement band is determined according to the CSI measurement band indication information sent by the network side device.

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 present invention is not limited thereto. The first setting The device may receive the 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 to indicate the second CSI measurement band, and the The first CSI measurement band is pre-defined; 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 according to the CSI measurement band indication information. The measurement band and the second measurement band are measured, but the embodiment of the invention is not limited thereto.

Optionally, the CSI measurement band indication information may indicate the first measurement band and/or the second measurement band explicitly or implicitly, and the CSI measurement band indication information indicates the first measurement band as an example, the CSI The measurement band indication information may indicate the first measurement band explicitly, 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 also pass Instructing the first adjustment band to implicitly indicate the first measurement band, wherein the first adjustment band is used to indicate a band value that is adjusted for a certain reference band, that is, the first measurement band is based on the first adjustment band The frequency band obtained after the adjustment of the reference frequency band, optionally, the reference frequency band may be a predefined one, or may be a measurement frequency band used when the first device performs the broadband CSI measurement last time or the first time, the embodiment of the present invention Not limited to this.

Optionally, if the first device receives the 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 adjustment band information and second adjustment band information,

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

S111, determining that the first measurement frequency band is a frequency band obtained by adjusting a measurement frequency band used for performing a wideband CSI measurement according to a bandwidth of the frequency band corresponding to the first adjustment frequency band information; and/or

5112. Determine that the second measurement frequency band is a frequency band obtained by adjusting a measurement frequency band used for performing the sub-band CSI measurement according to a bandwidth corresponding to the second adjustment frequency band information.

The first adjustment band information is used to indicate how the first device adjusts based on the measurement frequency band used in the last time performing the wideband CSI measurement to obtain the first measurement band. Optionally, the first adjustment band information may include the first band adjustment value, and correspondingly, the first device may add the bandwidth of the measurement band used in the last RI measurement to the first band adjustment. The value, as the bandwidth of the first measurement band for performing the wideband CSI measurement, the first band adjustment value may be a positive or negative number, corresponding to the bandwidth basis of the measurement band used by the first device when performing the RI measurement last time. The number of the measurement frequency bands is increased or decreased, but the embodiment of the present invention is not limited thereto. Optionally, the network side device and the first device may also pre-arrange the adjustment step of the measurement frequency band of the broadband CSI measurement, where The adjustment step size can be a fixed value or a downlink system bandwidth. For example, if the downlink system bandwidth is 10 MHz, the adjustment step is 1 MHz, and if the downlink system bandwidth is 20 MHz, the adjustment step is 2 MHz. Optionally, the adjustment step size may also be a sub-band size, but the embodiment of the present invention is not limited thereto; accordingly, the first adjustment band information may include a multiple of an adjustment step of the frequency band, and the first device The product of the multiple and the step size is used as the first band adjustment value. Optionally, as another embodiment, there may be multiple adjustment step sizes indicated by the predefined or network side device, and the first adjustment band information may also indicate the adjustment step size used this time, but the embodiment of the present invention There is no limit to this.

After the first device determines the bandwidth of the first measurement frequency band, the measurement frequency band used in the last time of performing the wideband CSI measurement may be adjusted in multiple manners to determine the first measurement frequency band, where the adjustment manner may be It is pre-defined, or may be indicated by the network side device. Optionally, the first device may fix one end of the measurement band used last time and adjust only the other end, or two of the measurement bands used last time. The adjustment is performed on the terminal. For example, when the measurement band used by the first device for performing the wideband CSI measurement is 5 MHz, and the first band adjustment value is 2 MHz, the first device may perform the broadband CSI measurement last time. The minimum frequency remains unchanged, and the maximum frequency is increased by 2 MHz; or the maximum frequency of the last wideband CSI measurement is kept unchanged, and the minimum frequency is reduced by 2 MHz; or the minimum frequency of the last wideband CSI measurement is lowered. 1 MHz and the maximum frequency is increased by 1 MHz, but the embodiment of the invention is not limited thereto.

Similarly, the second adjustment band information is used to indicate how the first device adjusts based on the measurement frequency band used in the last sub-band CSI measurement to obtain the second measurement band, the second adjustment band. For the implementation of the information, refer to the description of the first adjustment band information, which is not described here.

Optionally, in 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 select one of the at least two first candidate measurement bands The first candidate measurement band is used as the first measurement band; similarly, the first device may also have at least two second candidate measurement bands, and the network side device may indicate that the first device is the at least two second candidates Measuring a second candidate measurement band in the frequency band as the second measurement frequency And determining, according to the CSI measurement band indication information sent by the network side device, determining at least one of the first measurement band and the second measurement band, including:

S113. 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

S114. Determine the second measurement frequency band from the at least two second candidate measurement frequency bands according to the CSI measurement frequency band indication information sent by the network side device.

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

Optionally, the CSI measurement band indication information may be physical layer signaling or higher layer signaling, for example, Downlink Control Information (DCI) or Radio Resource Control (RRC), where Adding or multiplexing at least one bit (for example, adding 1~2 bits) to the DCI to indicate the first measurement band and/or the second measurement band, the RRC may be added signaling or Reuse existing signaling. The 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 correspondingly, the CSI measurement band indication information is semi-static signaling or dynamic signaling, but Embodiments of the invention are not limited thereto.

Optionally, as another embodiment, if the first device is configured with at least two CSI processes,

The same first measurement band and/or the same second measurement band, or the first measurement band and/or the second measurement band of each of the at least two CSI processes may be independent of each other, ie the at least two The first measurement band and/or the second measurement band of each CSI process in the CSI process may be different from each other, or the first measurement band and/or the second measurement band of the partial CSI processes in the at least two CSI processes are the same Correspondingly, 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 the same second measurement band; or

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 the first CSI process and the second CSI process in the at least one CSI process correspond to different second measurement bands; or

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 the first CSI process and the second CSI process in the at least one CSI process correspond to Different first measurement bands.

Optionally, the network side device may configure, by using independent configuration signaling, a first measurement frequency band and/or the second measurement frequency band for all CSI processes in the at least two CSI processes, or may further be the at least two Each of the CSI processes in the CSI process independently configures the first measurement band and/or the second measurement band, and embodiments of the present invention are not limited thereto.

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

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

If the UE is configured with at least two subframe sets, the at least two subframe sets correspond to the same first measurement frequency band, and the first subframe set and the second subframe set of the at least two subframe sets correspond to different second Measuring frequency band; or

If the UE is configured with at least two subframe sets, the at least two subframe sets correspond to the same second measurement frequency band, and the first subframe set and the second subframe set of the at least two subframe sets correspond to different first Measuring frequency band.

Optionally, the first device may perform the broadband CSI measurement and the sub-band CSI measurement, and send the measurement result to the network side device. The method 100 further includes: reporting the measurement of the broadband CSI measurement to the network side device. The result and the measured result of the sub-band CSI measurement; optionally, as another embodiment, the first device may also perform the broadband CSI measurement and the sub-band CSI measurement according to the indication of the network side device, and report the measurement result to the network side. The device, correspondingly, before S120, the method 100 further includes:

S140: Receive CSI reporting indication information sent by the network side device, where the CSI reporting indication information is used to indicate that the first device sends the broadband CSI and the subband CSI to the network side device.

S120. Perform broadband CSI measurement on the first measurement frequency band, including:

S121. Perform, according to the CSI reporting indication information, performing broadband CSI on the first measurement frequency band. measuring.

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

Therefore, according to the method for measuring CSI according to an embodiment of the present invention, the first device performs wideband CSI measurement on a first measurement frequency band having a bandwidth smaller than a downlink transmission bandwidth, and is in a second measurement frequency band that does not completely overlap with the first measurement frequency band. The sub-band CSI measurement is performed, and the measurement result of the broadband CSI and the sub-band CSI can be obtained, and the measurement result can be further reported to the network side device, so that the network side device can perform the measurement according to the measurement result reported by the first device. A scheme in which a device performs scheduling so that the base station cannot obtain the CSI measurement result reported by the UE and performs scheduling can improve scheduling efficiency of the network side device and improve system performance and user experience. Further, in the frequency domain dynamic interference control scenario, the first measurement frequency band may be a frequency band with relatively stable interference, so that the accuracy of the CSI measurement result obtained by the first device is higher, and the first measurement frequency band is The second measurement frequency band in which the first device performs sub-band CSI measurement does not completely overlap, so that the sub-band CSI measurement result of the first device includes more frequency band information, thereby improving the accuracy of the CSI measurement result of the first device. While maintaining the comprehensiveness of the measurement result, the efficiency of scheduling 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; and the network side device can learn the interference on each frequency band. The information, so as to know which sub-band CSI measurement results reported by the UE can provide accurate information for scheduling, and the above beneficial effects are more prominent when the first device supports only one CSI process.

With reference to FIG. 1 , a method for measuring CSI according to an embodiment of the present invention is described in detail from the perspective of a first device. Hereinafter, a method according to an embodiment of the present invention will be described in detail from the perspective of a network side device with reference to FIG. 2 . A method of measuring CSI.

FIG. 2 is a schematic flowchart of a method 200 for measuring CSI according to an embodiment of the present invention. The method may be performed by a network side device. Optionally, the network side device may be a base station, as shown in FIG. 2 , the method 200 includes:

S210. The network side device determines a CSI measurement frequency band used by the first device to perform CSI measurement, where the CSI measurement frequency band includes at least one of the following frequency bands: a first measurement frequency band for performing wideband CSI measurement and is used for performing subband CSI a measured second measurement band, wherein the bandwidth of the first measurement band is smaller than the downlink transmission bandwidth and the first measurement band does not completely overlap with the second measurement band; S220, sending CSI measurement band indication information to the first device, The CSI measurement band indication information is used to indicate the CSI measurement band. Therefore, according to the method for measuring CSI according to an embodiment of the present invention, the first device performs wideband CSI measurement on a first measurement frequency band having a bandwidth smaller than a downlink transmission bandwidth, and is in a second measurement frequency band that does not completely overlap with the first measurement frequency band. The sub-band CSI measurement is performed, and the measurement result of the broadband CSI and the sub-band CSI can be obtained, and the measurement result can be further reported to the network side device, so that the network side device can perform the measurement according to the measurement result reported by the first device. A scheme in which a device performs scheduling so that the base station cannot obtain the CSI measurement result reported by the UE and performs scheduling can improve scheduling efficiency of the network side device and improve system performance and user experience.

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 by using CSI measurement band indication information, that is, indicating the first The measurement band and/or the second measurement band. The network side device may explicitly indicate the CSI measurement frequency band, and may also implicitly indicate the CSI measurement frequency band, but the embodiment of the present invention does not limit this.

When the present invention is applied to a frequency domain dynamic interference control scenario, for example, the system adopts technologies such as dynamic node silence, dynamic power control, or dynamic interference coordination (such as interference direction coordination) in the frequency domain. In the prior art, the first The device performs wideband CSI and subband CSI measurements on the entire downlink system bandwidth. However, because the interference received in different frequency bands of the entire downlink system bandwidth is different, the wideband CSI measurement on the entire downlink system bandwidth may cause the broadband CSI to be inaccurate. Inaccurate measurement results of the wideband CSI may further result in inaccurate measurement results of the sub-band CSI, thereby reducing the efficiency of the base station scheduling based on the CSI measurement results reported by the UE, and reducing system performance and user experience. In the embodiment of the present invention, optionally, the first device performs interference on the first measurement frequency band of the wideband CSI measurement, that is, the first measurement frequency band may be a frequency band with relatively stable interference, specifically, the first measurement The interference fluctuation in the frequency band may be lower than a certain threshold, and the threshold may be pre-defined or pre-configured by the network side device, which is not limited by the present invention; and the second measurement frequency band may include an interference unstable frequency band, that is, including interference dynamics. The frequency band of change. In this way, the accuracy of the wideband CSI measurement obtained by the first device is higher than that of the prior art, and the first measurement frequency band does not completely overlap with the second measurement frequency band of the first device performing sub-band CSI measurement. The sub-band CSI measurement result of the first device can be included in the information of more frequency bands, thereby maintaining the comprehensiveness of the measurement result while improving the accuracy of the CSI measurement result of the first device, and improving the network side device according to The CSI measurement result reported by the first device performs scheduling efficiency, improving system performance and user experience.

Wherein, the wideband CSI measurement may include at least one of the following measurements: RI measurement, width With CQI measurement and wideband PMI measurement. Performing the broadband PMI measurement on the first measurement frequency band may mean that the first device selects a broadband PMI from the codebook when the downlink transmission is on the first measurement frequency band, and the foregoing selection may include the first device according to the first Selecting a measured channel on the measurement band; performing wideband CQI measurement on the first measurement band may refer to calculating a wideband CQI when the first device supports downlink transmission on the first measurement band; Performing the RI measurement on the measurement band may mean that the PMI is obtained when the first set downlink transmission is on the first measurement band, but the embodiment of the present invention is not limited thereto.

The sub-band CSI measurement can include at least one of the following measurements: sub-band PMI measurement and sub-band CQI measurement.

Optionally, in another embodiment, the first measurement frequency band and the second measurement frequency band do not completely overlap, and the method includes:

The first measurement frequency band does not overlap at all with the second measurement frequency band; or

Optionally, as another embodiment, the network side device may configure at least two first candidate CSI measurement bands for the first device by using high layer signaling, or the first device is predefined with at least two first candidates. The CSI measurement band, the network side device may select a certain first measurement band as the first measurement band from the at least two first candidate measurement bands, and correspondingly, S210, determine, when the first device performs CSI measurement. CSI measurement band, including:

S211. Determine a first measurement frequency band used by the first device to perform RI measurement from at least two first candidate CSI measurement 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 by using high layer signaling, or the first device is predefined with at least two second candidates. The CSI measurement band, the network side device may select a second candidate measurement band from the at least two second candidate measurement bands as the second measurement band, and correspondingly, S110, determine, when the first device performs CSI measurement. CSI measurement band, including:

S212. Determine a second measurement frequency band used by the first device to perform sub-band CSI measurement from at least two second candidate CSI measurement bands of the first device.

Optionally, the network side device may implicitly indicate the CSI measurement frequency band by indicating a bandwidth adjustment bandwidth of the CSI measurement frequency band to the first device, where the CSI measurement frequency band indication information includes at least one of the following information. Species: first adjustment band information and second adjustment band information, The first adjustment frequency band information is used to indicate that the first measurement frequency band is obtained by adjusting, by the first device, a measurement frequency band used for performing a wideband CSI measurement according to a frequency band bandwidth corresponding to the first adjustment frequency band information. a frequency band, the second adjustment frequency band information is used to indicate that the second measurement frequency band is obtained by adjusting, by the first device, the measurement frequency band used for the last sub-band CSI measurement according to the frequency band bandwidth corresponding to the second adjusted frequency band information. Frequency band.

The CSI measurement band indication information may be physical layer signaling or higher layer signaling, for example, DCI or RRC signaling, where at least one bit may be added in the DCI (for example, 1 to 2 bits are added) To indicate the first measurement band and/or the second measurement band, the RRC may be new signaling or multiplex existing signaling. The 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 correspondingly, the CSI measurement band indication information is semi-static signaling or dynamic signaling, but Embodiments of the invention are 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 band and the same second measurement band; or

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 band and the same second measurement band; or

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

S230, sending CSI reporting indication information to the first device, where the CSI reporting indication information is used to indicate that the first device reports CSI;

S240. Receive the first device according to the CSI reporting indication information and the CSI measurement band signaling. The measurement results of the CSI measurement are performed.

Therefore, according to the method for measuring CSI according to an embodiment of the present invention, the first device performs wideband CSI measurement on a first measurement frequency band having a bandwidth smaller than a downlink transmission bandwidth, and is in a second measurement frequency band that does not completely overlap with the first measurement frequency band. The sub-band CSI measurement is performed, and the measurement result of the broadband CSI and the sub-band CSI can be obtained, and the measurement result can be further reported to the network side device, so that the network side device can perform the measurement according to the measurement result reported by the first device. A scheme in which a device performs scheduling so that the base station cannot obtain the CSI measurement result reported by the UE and performs scheduling can improve scheduling efficiency of the network side device and improve system performance and user experience. Further, in the frequency domain dynamic interference control scenario, the first measurement frequency band may be a frequency band with relatively stable interference, so that the accuracy of the CSI measurement result obtained by the first device is higher, and the first measurement frequency band is The second measurement frequency band in which the first device performs sub-band CSI measurement does not completely overlap, so that the sub-band CSI measurement result of the first device includes more frequency band information, thereby improving the accuracy of the CSI measurement result of the first device. While maintaining the comprehensiveness of the measurement result, the efficiency of scheduling 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; and the network side device can learn the interference on each frequency band. The information, so as to know which sub-band CSI measurement results reported by the UE can provide accurate information for scheduling, and the above beneficial effects are more prominent when the first device supports only one CSI process. Detailed explanation. 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 node in the system, the UE is served by the micro node, but is interfered by the macro node, and the macro node uses the dynamic node to silence in the frequency domain. Reduce interference to UEs served by the micro-node. It is assumed that the first device is a UE, and the network side device is a base station corresponding to the micro node. As shown in FIG. 3, the base station configures the first measurement frequency band and the second measurement frequency band for the UE, and ensures that the first measurement frequency band is a frequency band in which the macro node is silent, and the second measurement frequency band may include a frequency band in which the macro node is silent. Also included is the non-silent band of the macro node. At this time, the UE measures the wideband CSI on the first measurement band and performs subband CSI measurement according to the subband included in the second measurement band. Since the base station knows which frequency bands of the second measurement band are silent on the measurement subframe of the UE and is not silent on those frequency bands, the base station also knows which of the sub-band CSIs fed back by the UE are silent nodes of the macro node. The corresponding CSI is carried out and the sub-band can be used for scheduling, but the embodiment of the present invention is not limited thereto.

It should be noted that this example of FIG. 3 is intended to assist those skilled in the art to better understand the present invention. The embodiments are not intended to limit the scope of the embodiments of the invention. Those skilled in the art according to the given figure

It is apparent that various modifications and changes can be made to the examples of the present invention, and such modifications or variations are also within the scope of the embodiments of the present invention.

It should be understood that the size of the sequence numbers of the above processes does not imply a sequence of executions, and the order of execution of the processes should be determined by its function and internal logic, and should not be construed as limiting the implementation process of the embodiments of the present invention.

The method for measuring CSI according to an embodiment of the present invention is described in detail above with reference to Figs. 1 through 3. Hereinafter, an apparatus for measuring CSI according to an embodiment of the present invention will be described with reference to Figs.

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

a determining module 310, configured to determine a first measurement frequency band for performing a wideband CSI measurement, and a second measurement frequency band, where the second measurement frequency band is used for performing sub-band CSI measurement, where the first measurement frequency band is The bandwidth is smaller than the downlink transmission bandwidth and the first measurement frequency band does not completely overlap with the second measurement frequency band;

The first measurement module 320 is configured to perform broadband CSI measurement on the first measurement frequency band determined by the determining module 310;

The second measurement module 330 is configured to perform sub-band 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 an apparatus for measuring CSI according to an embodiment of the present invention, a first device performs wideband CSI measurement on a first measurement band having a bandwidth smaller than a downlink transmission bandwidth, and a second measurement band that does not completely overlap with the first measurement band The sub-band CSI measurement is performed, and the measurement result of the broadband CSI and the sub-band CSI can be obtained, and the measurement result can be further reported to the network side device, so that the network side device can perform the measurement according to the measurement result reported by the first device. A scheme in which a device performs scheduling so that the base station cannot obtain the CSI measurement result reported by the UE and performs scheduling can improve scheduling efficiency of the network side device and improve system performance and user experience.

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 indicating PMI measurement.

Optionally, in another embodiment, the first measurement frequency band does not completely overlap the second measurement frequency band, and includes: The first measurement frequency band does not overlap at all with the second measurement frequency band; or

Optionally, in 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 the CSI measurement band indication information sent by the network side device.

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

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

The second determining unit 312 is configured to determine the second measurement frequency band from the at least two second candidate measurement frequency bands according to the CSI measurement frequency 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: first adjustment band information and second adjustment band information, and correspondingly, the determining module 310 includes:

a third determining unit 313, configured to determine that the first measurement frequency band is a frequency band obtained by adjusting a measurement frequency band used for performing a wideband CSI measurement according to a bandwidth of a frequency band corresponding to the first adjusted frequency band information; and/or

The fourth determining unit 314 is configured to determine that the second measurement frequency band is a frequency band obtained by adjusting a measurement frequency band used for the last sub-band CSI measurement according to a bandwidth corresponding to the second adjusted frequency band information.

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

Optionally, as another embodiment, if the UE is configured with at least two subframe sets, the The lesser two subframe sets correspond to the same first measurement band and the same second measurement band; or if the UE is configured with at least two subframe sets, the at least two subframe sets correspond to the same first measurement band and the at least two The first subframe set and the second subframe set in the subframe set correspond to different second measurement bands; or

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

The receiving module 340 is configured to receive CSI reporting indication information sent by the network side device, where the CSI reporting indication information is used to indicate the first device to the first measurement module 320 before performing the broadband CSI measurement on the first measurement frequency band. The network side device reports the CSI;

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

Correspondingly, the apparatus 300 further includes: a reporting module 350, configured to report, to the network side device, the measurement result of the broadband measurement by the first measurement module 320 and the measurement of the sub-band CSI measurement by the second measurement module 330 result.

The apparatus 300 for measuring CSI according to an embodiment of the present invention may correspond to the first apparatus in the method for measuring CSI according to an embodiment of the present invention, and the above and other operations and/or operations of the respective modules in the apparatus 300 The functions are respectively implemented in order to implement the corresponding processes of the respective methods in FIG. 1, and are not described here.

Therefore, according to an apparatus for measuring CSI according to an embodiment of the present invention, a first device performs wideband CSI measurement on a first measurement band having a bandwidth smaller than a downlink transmission bandwidth, and a second measurement band that does not completely overlap with the first measurement band The sub-band CSI measurement is performed, and the measurement result of the broadband CSI and the sub-band CSI can be obtained, and the measurement result can be further reported to the network side device, so that the network side device can perform the measurement according to the measurement result reported by the first device. A scheme in which a device performs scheduling so that the base station cannot obtain the CSI measurement result reported by the UE and performs scheduling can improve scheduling efficiency of the network side device and improve system performance and user experience. Further, in the frequency domain dynamic interference control scenario, the first measurement frequency band may be a frequency band with relatively stable interference, so that the accuracy of the CSI measurement result obtained by the first device is higher, and the first measurement frequency band is The second measurement frequency band in which the first device performs sub-band CSI measurement does not completely overlap, so that the sub-band CSI measurement result of the first device includes more frequency band information, thereby improving the CSI of the first device. The accuracy of the measurement result is maintained while maintaining the comprehensiveness of the measurement result, improving the efficiency of the network side device scheduling according to the CSI measurement result reported by the first device, improving system performance and user experience; and the network side device can learn each The interference information on the frequency band, so as to know which sub-band CSI measurement results reported by the UE can provide accurate information for scheduling, and the above beneficial effects are more prominent when the first device supports only one CSI process.

FIG. 5 is a schematic block diagram of an apparatus 400 for measuring channel state information CSI according to another embodiment of the present invention. The apparatus 400 may be a network side device in the foregoing method embodiment, as shown in FIG. 5, Apparatus 400 includes:

The determining module 410 is configured to determine a CSI measurement frequency band used by the first device to perform CSI measurement, where the CSI measurement frequency band includes at least one of the following frequency bands: a first measurement frequency band for performing wideband CSI measurement and is used for performing subband a second measurement frequency band of the CSI measurement, where the bandwidth of the first measurement frequency band is smaller than the downlink transmission bandwidth and the first measurement frequency band does not completely overlap with the second measurement frequency band; the sending module 420 is configured to send the CSI to the first device The band indication information is measured, and the CSI measurement band indication information is used to indicate the CSI measurement band determined by the determining module 410.

Optionally, in another embodiment, the determining module 410 is specifically configured to:

Determining, from at least two first candidate CSI measurement bands of the first device, a first measurement band used by the first device to perform RI measurement; and/or Determining, from at least two second candidate CSI measurement bands of the first device, a second measurement band used by the first device to perform sub-band CSI measurement.

Optionally, in another embodiment, the CSI measurement band indication information includes at least one of the following information: a first adjustment band information and a second adjustment band information, where

The first adjustment frequency band information is used to indicate that the first measurement frequency band is a frequency band obtained by adjusting, by the first device, a measurement frequency band used for performing a wideband CSI measurement according to a frequency band bandwidth corresponding to the first adjustment frequency band information,

The second adjustment band information is used to indicate that the second measurement band is a band obtained by adjusting, by the first device, a measurement band used for the last sub-band CSI measurement according to a band bandwidth corresponding to the second adjustment band information. .

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

Correspondingly, the device 400 further includes: a receiving module 430, configured to receive the first device according to the The CSI indication information and the CSI measurement band information transmitted by the sending module 420 perform measurement results of CSI measurement.

The apparatus 400 for measuring CSI according to an embodiment of the present invention may correspond to a network side device in a method for measuring CSI according to an embodiment of the present invention, and the above and other operations and/or functions of respective modules in the device 400 In order to implement the corresponding processes of the respective methods in FIG. 2, for the sake of cleaning, no further details are provided herein.

Therefore, according to an apparatus for measuring CSI according to an embodiment of the present invention, a first device performs wideband CSI measurement on a first measurement band having a bandwidth smaller than a downlink transmission bandwidth, and a second measurement band that does not completely overlap with the first measurement band The sub-band CSI measurement is performed, and the measurement result of the broadband CSI and the sub-band CSI can be obtained, and the measurement result can be further reported to the network side device, so that the network side device can perform the measurement according to the measurement result reported by the first device. A scheme in which a device performs scheduling so that the base station cannot obtain the CSI measurement result reported by the UE and performs scheduling can improve scheduling efficiency of the network side device and improve system performance and user experience. Further, in the frequency domain dynamic interference control scenario, the first measurement frequency band may be a frequency band with relatively stable interference, so that the accuracy of the CSI measurement result obtained by the first device is higher, and the first measurement frequency band is The second measurement frequency band in which the first device performs sub-band CSI measurement does not completely overlap, so that the sub-band CSI measurement result of the first device includes more frequency band information, thereby improving the accuracy of the CSI measurement result of the first device. While maintaining the comprehensiveness of the measurement result, the efficiency of scheduling 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; and the network side device can learn the interference on each frequency band. The information, so as to know which sub-band CSI measurement results reported by the UE can provide accurate information for scheduling, and the above beneficial effects are more prominent when the first device supports only one CSI process.

FIG. 6 is a schematic flowchart of an apparatus 500 for measuring channel state information CSI according to an embodiment of the present invention, where the apparatus 500 may correspond to the first device in the foregoing method embodiment, as shown in FIG. The device 500 includes a processor 510, a memory 520, and a bus system 530. The processor 510 and the memory 520 are connected by a bus system 530. The memory 520 is used to store instructions. The processor 510 calls the instruction stored in the memory 520 through the bus system 530. Specifically, the processor 510 uses Determining a first measurement frequency band for performing a wideband CSI measurement, and a second measurement frequency band for performing a sub-band 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 with the second measurement frequency band; performing wideband CSI measurement on the first measurement frequency band; Sub-band CSI measurements are performed on the second measurement band based on the measurements obtained from the wideband CSI measurement.

It should be understood that in the embodiment of the present invention, the processor 510 may be a central processing unit (Central)

The processing unit, referred to as a "CPU", 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 gates or transistor logic devices, discrete hardware components, and more. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like.

The memory 520 can 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 non-volatile random access memory. For example, the memory 520 can also store information of the device type.

The bus system 530 may include a power bus, a control bus, and a status signal bus in addition to the data bus. However, for clarity of description, various buses are labeled as bus system 530 in the figure.

In an implementation process, the steps of the above method may be completed by an integrated logic circuit of hardware in the processor 510 or an instruction in the form of software. The steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor. The software modules can be located in random memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, etc., which are well established in the art. The storage medium is located in the memory 520. The processor 510 reads the information in the memory 520 and completes the steps of the above method in combination with the hardware. To avoid repetition, it will not be described in detail here.

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

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

Determining the first measurement frequency band from the at least two first candidate measurement frequency bands according to the CSI measurement frequency band indication information sent by the network side device; and/or

And determining, according to the CSI measurement band indication information sent by the network side device, the second measurement band from the at least two second candidate measurement bands.

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

Determining that the first measurement frequency band is a frequency band obtained by adjusting a measurement frequency band used for performing a wideband CSI measurement according to a frequency band bandwidth corresponding to the first adjustment frequency band information; and/or determining the second measurement frequency band according to the The frequency band corresponding to the second adjustment band information is the frequency band obtained by adjusting the measurement band used for the previous sub-band CSI measurement.

If the UE is configured with at least two subframe sets, the at least two subframe sets correspond to the same a first measurement band and a first subframe set and a second subframe set of the at least two subframe sets correspond to different second measurement bands; or

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

The receiver 540 is configured to receive CSI reporting indication information sent by the network side device, where the CSI reporting indication information is used to indicate the first device to the network, before the processor 510 performs the broadband CSI measurement on the first measurement frequency band. The side device reports the CSI;

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

The apparatus 300 further includes: a transmitter 550, configured to report, to the network side device, the measurement result of the wideband CSI measurement and the subband CSI measurement 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 operations of the respective modules in the apparatus 500 The functions are respectively implemented in order to implement the corresponding processes of the respective methods in FIG. 1, and are not described here.

Therefore, according to an apparatus for measuring CSI according to an embodiment of the present invention, a first device performs wideband CSI measurement on a first measurement band having a bandwidth smaller than a downlink transmission bandwidth, and a second measurement band that does not completely overlap with the first measurement band The sub-band CSI measurement is performed, and the measurement result of the broadband CSI and the sub-band CSI can be obtained, and the measurement result can be further reported to the network side device, so that the network side device can perform the measurement according to the measurement result reported by the first device. A scheme in which a device performs scheduling so that the base station cannot obtain the CSI measurement result reported by the UE and performs scheduling can improve scheduling efficiency of the network side device and improve system performance and user experience. Further, in the frequency domain dynamic interference control scenario, the first measurement frequency band may be a frequency band with relatively stable interference, so that the accuracy of the CSI measurement result obtained by the first device is higher, and the first measurement frequency band is The second measurement frequency band in which the first device performs sub-band CSI measurement does not completely overlap, so that the sub-band CSI measurement result of the first device includes more frequency band information, thereby improving the accuracy of the CSI measurement result of the first device. While maintaining the comprehensiveness of the measurement result, the efficiency of scheduling 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; and the network side device can learn the interference on each frequency band. Information, so that the UE reports Which sub-band CSI measurements can provide accurate information for scheduling, and the above-described beneficial effects are more prominent in the case where the first device supports only one CSI process.

FIG. 7 is a schematic block diagram of an apparatus 600 for measuring channel state information CSI according to another embodiment of the present invention. The apparatus 600 may be a network side device in the foregoing method embodiment, as shown in FIG. Apparatus 600 includes a processor 610, a memory 620, a bus system 630, and a transmitter 640. The processor 610, the memory 620, and the transmitter 640 are connected by a bus system 630. The memory 620 is configured to store an instruction, and the processor 610 calls the instruction stored in the memory 620 through the bus system 630. Specifically, the The processor 610 is configured to determine a CSI measurement frequency band used by the first device to perform CSI measurement, where the CSI measurement frequency band includes at least one of the following frequency bands: a first measurement frequency band for performing wideband CSI measurement and is used for performing sub-band CSI Measuring a second measurement frequency band, 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; the transmitter 640 is configured to send a CSI measurement to the first measurement device Band indication information, the CSI measurement band indication information is used to indicate the CSI measurement band determined by the processor 610.

It should be understood that in the embodiment of the present invention, the processor 610 may be a central processing unit (Central)

The processing unit, referred to as the "CPU", 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 gates or transistor logic devices, discrete hardware components, and more. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like.

The memory 620 can 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 can 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 the data bus. However, for the sake of clarity, the various buses are labeled as buses in the figure. System 630.

In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in the processor 610 or an instruction in the form of software. The steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor. The software modules can be located in random memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, etc., which are well established in the art. The storage medium is located in the memory 620. The processor 610 reads the information in the memory 620 and combines the hardware to perform the steps of the above method. To avoid repetition, it will not be described in detail here.

Optionally, in another embodiment, the processor 610 is specifically configured to:

Determining, from at least two first candidate CSI measurement bands of the first device, a first measurement band used by the first device to perform RI measurement; and/or

Determining, from at least two second candidate CSI measurement bands of the first device, a second measurement band employed by the first device to perform sub-band CSI measurements.

Optionally, as another embodiment, if the UE is configured with at least one CSI process, the One less CSI process corresponds to the same first measurement band and the same second measurement band; or 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 the at least one CSI process The first CSI process and the second CSI process correspond to different second measurement bands; or

Optionally, in another embodiment, the transmitter 640 is further configured to send the CSI report indication information to the first device, where the CSI report indication information is used to indicate that the first device reports the CSI;

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

The apparatus 600 for measuring CSI according to an embodiment of the present invention may correspond to a network side device in a method for measuring CSI according to an embodiment of the present invention, and the above and other operations and/or functions of respective modules in the apparatus 600 In order to implement the corresponding processes of the respective methods in FIG. 2, for the sake of cleaning, no further details are provided herein.

Therefore, according to an apparatus for measuring CSI according to an embodiment of the present invention, a first device performs wideband CSI measurement on a first measurement band having a bandwidth smaller than a downlink transmission bandwidth, and a second measurement band that does not completely overlap with the first measurement band The sub-band CSI measurement is performed, and the measurement result of the broadband CSI and the sub-band CSI can be obtained, and the measurement result can be further reported to the network side device, so that the network side device can perform the measurement according to the measurement result reported by the first device. A scheme in which a device performs scheduling so that the base station cannot obtain the CSI measurement result reported by the UE and performs scheduling can improve scheduling efficiency of the network side device and improve system performance and user experience. Further, in the frequency domain In the dynamic interference control scenario, the first measurement frequency band may be a frequency band with relatively stable interference, so that the accuracy of the CSI measurement result obtained by the first device is higher, and the first measurement frequency band is performed by the first device. The second measurement band with CSI measurement does not completely overlap, enabling the sub-band CSI measurement result of the first device to include more frequency band information, thereby maintaining the measurement while improving the accuracy of the CSI measurement result of the first device The comprehensiveness of the result improves the efficiency of the network side device scheduling according to the CSI measurement result reported by the first device, improves system performance and user experience; and the network side device can learn the interference information on each frequency band, thereby knowing the UE Which sub-band CSI measurement results are reported can provide accurate information for scheduling, and the above beneficial effects are more prominent when the first device supports only one CSI process.

It should be understood that in the embodiments of the present invention, the term "and/or" is merely an association relationship describing an associated object, indicating that there may be three relationships. For example, A and / or B, can mean: A exists separately, there are A and B, and there are three cases of B alone. In addition, the character " /" in this article generally indicates that the contextual object is an "or" relationship.

Those skilled in the art will appreciate that the various method steps and elements described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both, in order to clearly illustrate hardware and software. Interchangeability, the steps and composition of the various embodiments have been generally described in terms of function in the foregoing description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. Different methods may be used to implement the described functionality for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

A person skilled in the art can clearly understand that, for the convenience and the cleaning of the description, the specific working processes of the system, the device and the unit described above can refer to the corresponding processes in the foregoing method embodiments, and details are not described herein again.

In the several embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, or an electrical, mechanical or other form of connection.

The units described as separate components may or may not be physically separate. The components displayed for the unit may or may not be physical units, ie may be located in one place, or may be distributed over multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the embodiments of the present invention.

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

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention contributes in essence or 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. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a USB flash drive, a removable hard disk, a read-only memory (called "ROM"), a random access memory ("RAM" called "RAM"), a disk or A variety of media such as optical discs that can store program code.

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any equivalent person can be easily conceived within the technical scope of the present invention. Modifications or substitutions are intended to be included within the scope of the invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

Rights request

A method for measuring channel state information CSI, comprising: a first device determining a first measurement band and a second measurement band, wherein the first measurement band is used for performing a wideband CSI measurement, The second measurement band is used for performing sub-band CSI measurement, where the bandwidth of the first measurement band is smaller than the downlink transmission bandwidth and the first measurement band does not completely overlap with the second measurement band;

Performing a wideband CSI measurement on the first measurement band;

Sub-band CSI measurement is performed on the second measurement band based on the measurement result obtained by the wideband CSI measurement.

2. The method of claim 1, wherein the wideband CSI measurement comprises at least one of the following: a rank indication RI measurement, a wideband channel quality indicator CQI measurement, and a wideband precoding indicator PMI measurement.

The method according to claim 1 or 2, wherein the first measurement frequency band does not completely overlap with the second measurement frequency band, and includes:

a portion of the first measurement band overlaps with a portion of the second measurement band; or

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

The method according to any one of claims 1 to 3, wherein the determining the first measurement band and the second measurement band comprises:

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.

The method according to claim 4, wherein the determining the at least one of the first measurement band and the second measurement band according to the CSI measurement band indication information sent by the network side device comprises:

Determining, 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

And determining, 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.

6. The method according to claim 4, wherein the CSI measurement band indication The information includes at least one of the following: the first adjustment band information and the second adjustment band information, where the determining, in the first measurement band and the second measurement band, the CSI measurement band indication information sent by the network side device At least one, including:

Determining that the first measurement frequency band is a frequency band obtained by adjusting a measurement frequency band used for performing a wideband CSI measurement according to a frequency band bandwidth corresponding to the first adjustment frequency band information; and/or

The second measurement band is determined to be a frequency band obtained by adjusting a measurement band used for the last sub-band CSI measurement according to a bandwidth corresponding to the second adjustment band information.

The method according to any one of claims 3 to 6, wherein the CSI measurement band indication information is semi-static signaling or dynamic signaling.

The method according to any one of claims 1 to 7, wherein 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 the same second measurement band; or

The at least one CSI process corresponds to the same first measurement band and the first CSI process and the second CSI process in the at least one CSI process correspond to different second measurement bands; or

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

The method according to any one of claims 1 to 8, wherein if the UE is configured with at least two subframe sets,

The at least two subframe sets correspond to the same first measurement band and the same second measurement 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 of the at least two subframe sets correspond to different second measurement bands; or

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

The method according to any one of claims 1 to 9, wherein before the performing the wideband CSI measurement on the first measurement band, the method further comprises:

Receiving CSI reporting indication information sent by the network side device, where the CSI reporting indication information is used to instruct the first device to report CSI to the network side device;

The performing broadband CSI measurement on the first measurement frequency band includes: Performing a wideband CSI measurement on the first measurement frequency band according to the indication information on the CSI; the method further includes:

And measuring, by the network side device, the measurement result of the broadband CSI measurement and the measurement result of the sub-band CSI measurement.

A method for measuring channel state information CSI, comprising: determining, by a network side device, a CSI measurement frequency band used by a first device to perform 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 sub-band CSI measurement, wherein a bandwidth of the first measurement band is smaller than a downlink transmission bandwidth and the first measurement band is The second measurement band does not completely overlap;

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

12. The method of claim 11, wherein the wideband CSI measurement comprises at least one of the following: a rank indication RI measurement, a wideband channel quality indicator CQI measurement, and a wideband precoding indicator PMI measurement.

The method according to claim 11 or 12, wherein the first measurement frequency band does not completely overlap with the second measurement frequency band, and includes:

The method according to any one of claims 11 to 13, wherein the determining a CSI measurement frequency band used by the first device to perform CSI measurement comprises:

Determining, from at least two second candidate CSI measurement bands of the first device, a second measurement band used by the first device to perform sub-band CSI measurement.

The method according to any one of claims 11 to 14, wherein the CSI measurement band indication information comprises at least one of the following information: first adjustment band information and second adjustment band information, wherein ,

The first adjustment frequency band information is used to indicate that the first measurement frequency band is the first device root a frequency band obtained by adjusting a measurement frequency band used for performing a wideband CSI measurement according to a bandwidth of the first adjustment band information,

The second adjustment band information is used to indicate that the second measurement band is adjusted by the first device according to the band bandwidth corresponding to the second adjustment band information, and the measurement band used for the last sub-band CSI measurement is adjusted. The frequency band obtained.

The method according to any one of claims 11 to 15, wherein the CSI measurement band indication information is semi-static signaling or dynamic signaling.

The method according to any one of claims 11 to 16, wherein if the UE is configured with at least one CSI process,

The method according to any one of claims 11 to 17, wherein if the UE is configured with at least two subframe sets,

The method according to any one of claims 11 to 18, wherein the method further comprises:

Sending the CSI report indication information to the first device, where the CSI report indication information is used to indicate that the first device reports the CSI;

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

20. An apparatus for measuring channel state information CSI, comprising: a determining module, configured to determine a first measurement frequency band and a second measurement frequency band, the first measurement frequency band For performing a wideband CSI measurement, where the second measurement frequency band is used for performing sub-band 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 are not Completely overlapping;

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

And a second measurement module, configured to perform sub-band CSI measurement on the second measurement frequency band according to the measurement result obtained by the first measurement module by performing the wide-band CSI measurement.

21. The apparatus of claim 20, wherein the wideband CSI measurement comprises at least one of the following: a rank indication RI measurement, a wideband channel quality indicator CQI measurement, and a wideband precoding indicator PMI measurement.

The device according to claim 20 or 21, wherein the first measurement frequency band does not completely overlap with the second measurement frequency band, and includes:

The device according to any one of claims 20 to 22, wherein the determining module is specifically configured to determine the first measurement frequency band and the second according to CSI measurement frequency band indication information sent by the network side device. Measuring at least one of the frequency bands.

The device according to claim 23, wherein the determining module comprises: a first determining unit, configured to: according to the CSI measurement band indication information sent by the network side device, from at least two first Determining the first measurement band in a candidate measurement band; and/or

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

The apparatus according to claim 23, wherein the CSI measurement band indication information comprises at least one of the following information: first adjustment band information and second adjustment band information,

The determining module includes:

a third determining unit, configured to determine that the first measurement frequency band is a frequency band obtained by adjusting a measurement frequency band used for performing a wideband CSI measurement according to a frequency band bandwidth corresponding to the first adjusted frequency band information; and/or And a fourth determining unit, configured to determine that the second measurement frequency band is a frequency band obtained by adjusting a measurement frequency band used for performing a sub-band CSI measurement according to a frequency bandwidth corresponding to the second adjusted frequency band information.

The device according to any one of claims 22 to 25, wherein the CSI measurement band indication information is semi-static signaling or dynamic signaling.

The apparatus according to any one of claims 20 to 26, wherein, if the UE is configured with at least one CSI process,

The apparatus according to any one of claims 20 to 27, wherein, if the UE is configured with at least two subframe sets,

The device according to any one of claims 20 to 28, wherein the device further comprises:

a receiving module, configured to receive CSI reporting indication information sent by the network side device, where the first measurement module performs the CSI measurement on the first measurement frequency band, where the CSI reporting indication information is used to indicate the first The device reports the CSI to the network side device.

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

The device also includes:

An upper module, configured to perform the broadband on the first measurement module on the network side device

The measurement result of the CSI measurement and the measurement result of the sub-band CSI measurement performed by the second measurement module fruit.

30. An apparatus for measuring channel state information (CSI), comprising: a determining module, configured to determine a CSI measurement frequency band used by a first device to perform CSI measurement, where the CSI measurement frequency band includes at least one of the following frequency bands. a first measurement frequency band for performing wideband CSI measurement and a second measurement frequency band for performing sub-band CSI measurement, wherein a bandwidth of the first measurement frequency band is smaller than a downlink transmission bandwidth and the first measurement frequency band is The second measurement bands do not completely overlap;

And a sending module, 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.

31. The apparatus of claim 30, wherein the wideband CSI measurement comprises at least one of the following: a rank indication RI measurement, a wideband channel quality indicator CQI measurement, and a wideband precoding indicator PMI measurement.

The device according to claim 30 or 31, wherein the first measurement frequency band does not completely overlap with the second measurement frequency band, and includes:

The apparatus according to any one of claims 30 to 32, wherein the determining module is specifically configured to:

The apparatus according to any one of claims 30 to 33, wherein

The CSI measurement band indication information includes at least one of the following information: first adjustment band information and second adjustment band information, wherein

The first adjustment frequency band information is used to indicate that the first measurement frequency band is adjusted by the first device according to the frequency band bandwidth corresponding to the first adjusted frequency band information, and the measurement frequency band used for the last wideband CSI measurement is adjusted. The frequency band obtained,

The second adjustment band information is used to indicate that the second measurement band is the first device root The frequency band obtained by adjusting the measurement frequency band used for the previous sub-band CSI measurement according to the bandwidth of the second adjustment band information.

The device according to any one of claims 30 to 34, wherein the CSI measurement band indication information is semi-static signaling or dynamic signaling.

36. The apparatus according to any one of claims 30 to 35, wherein

The UE is configured with at least one CSI process,

The apparatus according to any one of claims 30 to 36, wherein, if the UE is configured with at least two subframe sets,

The device according to any one of claims 30 to 37, wherein 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 The first device reports the CSI;

The device also includes:

And a receiving module, configured to receive, by the first device, a measurement result of the CSI measurement according to the CSI upper limit indication information and the CSI measurement frequency band information sent by the sending module.