WO2024093830A1 - 一种信道状态参数的上报方法、装置及系统 - Google Patents

一种信道状态参数的上报方法、装置及系统 Download PDF

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Publication number
WO2024093830A1
WO2024093830A1 PCT/CN2023/127171 CN2023127171W WO2024093830A1 WO 2024093830 A1 WO2024093830 A1 WO 2024093830A1 CN 2023127171 W CN2023127171 W CN 2023127171W WO 2024093830 A1 WO2024093830 A1 WO 2024093830A1
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csi
basis vectors
spatial basis
resources
indication information
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English (en)
French (fr)
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李婷
王潇涵
陈心悦
金黄平
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to KR1020257018451A priority Critical patent/KR20250099243A/ko
Priority to EP23884762.8A priority patent/EP4615089A4/en
Priority to JP2025525843A priority patent/JP2025537001A/ja
Publication of WO2024093830A1 publication Critical patent/WO2024093830A1/zh
Priority to US19/196,573 priority patent/US20250260459A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0634—Antenna weights or vector/matrix coefficients
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636—Feedback format
    • H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams

Definitions

  • the present application relates to the field of communications, and in particular to a method, device and system for reporting channel state parameters.
  • the FDD system In the Frequency Division Duplex Massive Multiple Input Multiple Output (FDD massive MIMO) system, the FDD system cannot obtain the complete downlink channel state through uplink channel state estimation due to the large frequency interval between the uplink and downlink channels and the incomplete reciprocity between the uplink and downlink channels. Therefore, the acquisition of downlink channel state information (CSI) becomes the key for the FDD system to determine the downlink channel state.
  • channel state information such as Precoding Matrix Indicator (PMI) is usually reported for terminal devices and a single Transmitting and Receiving Point (TRP).
  • PMI Precoding Matrix Indicator
  • TRP Transmitting and Receiving Point
  • communication systems such as the fifth generation (5G) system
  • 5G fifth generation
  • multi-TRP cooperative transmission multiple TRPs cooperate with each other to jointly provide services for terminal devices.
  • the terminal device needs to report the channel status information between each TRP in the collaborative TRP. How to effectively report the channel status parameters of multiple TRPs has become an urgent problem to be solved.
  • the present application provides a method, device and system for reporting channel state parameters, which can accurately obtain channel state information of multiple TRPs and improve communication quality.
  • a method for reporting channel state parameters may include: obtaining the number of spatial basis vectors corresponding to N channel state information reference signal resources (Channel State Information Reference Signal resource, CSI-RS resource), wherein the N CSI-RS resources are determined from Q CSI-RS resources, wherein N is a positive integer less than or equal to Q, and wherein Q is a positive integer greater than or equal to 1; and sending indication information, wherein the indication information is used to indicate the number of spatial basis vectors corresponding to the N CSI-RS resources.
  • CSI-RS resource Channel State Information Reference Signal resource
  • the number of spatial basis vectors corresponding to each of the N CSI-RS resources is determined based on the total number of spatial basis vectors supported by the Q CSI-RS resources, and the total number of spatial basis vectors corresponding to each of the N CSI-RS resources is less than or equal to the total number of spatial basis vectors supported by the Q CSI-RS resources.
  • the number of spatial basis vectors in the present application is an example of channel state information, which can be used by a network device to determine the channel state information of multiple TRPs.
  • the present application is not limited to this, and other parameters that can reflect channel state information can also be applied to the solution of the present application, such as the number of ports.
  • N CSI-RS resources correspond one-to-one to the N TRPs, and the CSI-RS resources in this application are also applicable when they are replaced with TRPs.
  • the terminal device determines the number of spatial basis vectors corresponding to each of the multiple TRPs, it reports it to the network device, so that the network device can obtain the number of spatial basis vectors corresponding to each of the multiple TRPs, thereby enabling the network device to determine the precoding matrix of each of the multiple TRPs.
  • the method may also include: obtaining a first parameter, the first parameter being used to indicate the maximum value of the sum of the number of spatial basis vectors corresponding to the N CSI-RS resources respectively, the first parameter being less than or equal to the sum of the number of spatial basis vectors supported by the Q CSI-RS resources, and determining the number of spatial basis vectors corresponding to the N CSI-RS resources respectively based on the first parameter.
  • the first parameter can be understood as an upper limit value of the sum of the number of spatial basis vectors corresponding to the N CSI-RS resources.
  • the number of spatial basis vectors corresponding to the TRP is within the capacity of the TPR to support the number of spatial basis vectors.
  • obtaining the number of spatial basis vectors corresponding to the N CSI-RS resources includes: obtaining the number of spatial basis vectors corresponding to the N CSI-RS resources according to the first parameter and the candidate set of spatial basis vector number values.
  • the value of the number of spatial basis vectors can be determined from a candidate set of values of the number of spatial basis vectors, and the candidate set of values of the number of spatial basis vectors can be predefined by the protocol, can be preconfigured, or can be indicated.
  • the network device indicates the candidate set of values of the number of spatial basis vectors to the terminal device. This application does not limit this.
  • the indication information used to indicate the number of spatial basis vectors corresponding to the N CSI-RS resources respectively includes: the indication information includes first indication information and second indication information, wherein the first indication information is used to indicate the sum of the number of spatial basis vectors corresponding to the N CSI-RS resources respectively, and the second indication information is used to indicate the number of spatial basis vectors corresponding to the N CSI-RS resources respectively.
  • the second indication information is used to indicate spatial basis vectors corresponding to the N CSI-RS resources respectively.
  • the second indication information indicates the spatial basis vector
  • the network device can determine the number of spatial basis vectors corresponding to the N CSI-RS resources respectively according to the spatial basis vector.
  • this method can be understood as implicitly indicating the number of spatial basis vectors.
  • the second indication information includes S bits, and S is determined based on the N, P and Ltot, wherein the P is the number of CSI-RS ports of the TRP corresponding to any CSI-RS resource among the N CSI-RS resources, and the Ltot is the sum of the number of spatial basis vectors corresponding to the N CSI-RS resources respectively.
  • the second indication information indicates one of the multiple options through multiple bits to indicate the spatial basis vector corresponding to each of the N CSI-RS resources to the network device, thereby further enabling the network device to determine the number of spatial basis vectors corresponding to each of the N CSI-RS resources, thereby saving indication overhead.
  • the first indication information is carried in CSI part 1, and the second indication information is carried in CSI part 2.
  • the indication information includes bits, the first bits or bits are used to indicate the number of spatial basis vectors corresponding to the N CSI-RS resources respectively. bits or Each bit bits correspond to the index of a spatial basis vector quantity in the candidate set of spatial basis vector quantity values, and Y is the number of elements contained in the candidate set of spatial basis vector quantity values.
  • bits are designated in the indication information to indicate the number of spatial basis vectors corresponding to the N CSI-RS resources respectively, and the network device does not need to parse the remaining bits not used for indication, thereby reducing the complexity of the analysis.
  • the indication information includes bits, the bits are divided into Q groups, any of which includes bits, the Q groups correspond to the Q CSI-RS resources respectively, and the N groups of bits corresponding to the N CSI-RS resources are respectively used to indicate the index of the number of spatial basis vectors corresponding to the N CSI-RS resources respectively in the candidate set of values for the number of spatial basis vectors, and Y is the number of elements contained in the candidate set of values for the number of spatial basis vectors.
  • the bits of the indication information correspond to Q CSI-RS resources, and values can be assigned to the bits corresponding to N CSI-RS resources to indicate the number of spatial basis vectors corresponding to the N CSI-RS resources.
  • the network device does not need to parse the remaining bits that do not correspond to the N CSI-RS resources, which further improves the flexibility of the indication information design.
  • obtaining the number of spatial basis vectors corresponding to the N CSI-RS resources respectively includes: obtaining the number of spatial basis vectors corresponding to the N CSI-RS resources respectively according to the first parameter and a first corresponding relationship, the first corresponding relationship being a correspondence between a first index and the number of spatial basis vectors corresponding to the N CSI-RS resources respectively.
  • the first correspondence relationship belongs to the second correspondence relationship
  • the second correspondence relationship includes at least two correspondence relationships
  • the at least two correspondence relationships include at least two indexes
  • the at least two indexes include the second index and a third index
  • the value of the second index is less than the value of the third index
  • the sum of the number of spatial basis vectors corresponding to the N CSI-RS resources corresponding to the second index is less than the sum of the number of spatial basis vectors corresponding to the N CSI-RS resources corresponding to the third index.
  • the indication information is used to indicate the number of spatial basis vectors corresponding to N CSI-RS resources respectively, including: the indication information is used to indicate a first index.
  • the first correspondence relationship and/or the second correspondence relationship may be predefined by the protocol, may be preconfigured, or may be indicated, for example, the network device indicates the first correspondence relationship and/or the second correspondence relationship to the terminal device. This application does not limit this.
  • the indication information only needs to indicate the index, and the network device can determine the number of spatial basis vectors corresponding to the N CSI-RS resources respectively according to the index and the corresponding relationship, thereby further saving indication overhead.
  • the method further includes: receiving configuration information, the configuration information being used to indicate at least one of the following: the first parameter, the average value of the number of spatial basis vectors supported by the N CSI-RS resources, and the average value of the number of spatial basis vectors supported by the Q CSI-RS resources, and obtaining the first parameter includes: determining the first parameter according to the configuration information.
  • the configuration information may directly indicate the value of the first parameter, or may indicate other parameters used to determine the value of the first parameter.
  • the indication information is further used to indicate the N CSI-RS resources.
  • the indication information indicates N CSI-RS resources, which can be used in the above-mentioned implementation methods.
  • the network device combines the indication information of N CSI-RS resources with the indication information of the number of spatial basis vectors, so as to accurately determine the number of spatial basis vectors corresponding to each CSI-RS resource, thereby improving the accuracy of the network device in determining the status of each TRP channel.
  • a method for reporting channel state parameters may include: receiving indication information, the indication information being used to indicate the number of spatial basis vectors corresponding to N channel state information reference signal resources CSI-RS resources, respectively, the N CSI-RS resources being determined from Q CSI-RS resources, the N being a positive integer less than or equal to Q, and the Q being a positive integer greater than or equal to 1; determining a precoding matrix according to the number of spatial basis vectors corresponding to the N CSI-RS resources.
  • the number of spatial basis vectors corresponding to each of the N CSI-RS resources is determined based on the total number of spatial basis vectors supported by the Q CSI-RS resources, and the total number of spatial basis vectors corresponding to each of the N CSI-RS resources is less than or equal to the total number of spatial basis vectors supported by the Q CSI-RS resources.
  • the number of spatial basis vectors corresponding to the N CSI-RS resources is determined based on a first parameter, and the first parameter is used to indicate the maximum value of the sum of the number of spatial basis vectors corresponding to the N CSI-RS resources, and the first parameter is less than or equal to the sum of the number of spatial basis vectors supported by the Q CSI-RS resources.
  • the number of spatial basis vectors corresponding to the N CSI-RS resources respectively is determined based on the first parameter, including: the number of spatial basis vectors corresponding to the N CSI-RS resources respectively is determined based on the first parameter and a candidate set of values for the number of spatial basis vectors, the first candidate set of values for the number of spatial basis vectors includes at least one value, and any number of spatial basis vectors among the numbers of spatial basis vectors corresponding to the N CSI-RS resources respectively belongs to the candidate set of values for the number of spatial basis vectors.
  • the indication information used to indicate the number of spatial basis vectors corresponding to the N CSI-RS resources respectively includes: the indication information includes first indication information and second indication information, wherein the first indication information is used to indicate the sum of the number of spatial basis vectors corresponding to the N CSI-RS resources respectively, and the second indication information is used to indicate the number of spatial basis vectors corresponding to the N CSI-RS resources respectively.
  • the second indication information is used to indicate the spatial basis vectors corresponding to the N CSI-RS resources respectively.
  • the second indication information includes S bits, and S is determined based on the N, P and Ltot, wherein the P is the number of CSI-RS ports of the TRP corresponding to any CSI-RS resource among the N CSI-RS resources, and the Ltot is the sum of the number of spatial basis vectors corresponding to the N CSI-RS resources respectively.
  • the first indication information is carried in CSI part 1
  • the second indication information is carried in CSI part 2.
  • the indication information includes bits, the first bits or bits are used to indicate the number of spatial basis vectors corresponding to the N CSI-RS resources respectively. bits or Each bit bits correspond to the index of a spatial basis vector quantity in the candidate set of spatial basis vector quantity values, and Y is the number of elements contained in the candidate set of spatial basis vector quantity values.
  • the indication information includes bits, the bits are divided into Q groups, any of which includes bits, the Q groups correspond to the Q CSI-RS resources respectively, and the N groups of bits corresponding to the N CSI-RS resources are respectively used to indicate the index of the number of spatial basis vectors corresponding to the N CSI-RS resources in the candidate set of values for the number of spatial basis vectors.
  • the number of spatial basis vectors corresponding to the N CSI-RS resources is determined according to the first parameter, including: the number of spatial basis vectors corresponding to the N CSI-RS resources is determined according to the first parameter and the first The first corresponding relationship is determined by a corresponding relationship between the first index and the number of spatial basis vectors corresponding to the N CSI-RS resources respectively.
  • the first correspondence relationship belongs to the second correspondence relationship
  • the second correspondence relationship includes at least two correspondence relationships
  • the at least two correspondence relationships include at least two indexes
  • the at least two indexes include the second index and a third index
  • the value of the second index is less than the value of the third index
  • the sum of the number of spatial basis vectors corresponding to the N CSI-RS resources corresponding to the second index is less than the sum of the number of spatial basis vectors corresponding to the N CSI-RS resources corresponding to the third index.
  • the indication information is used to indicate the number of spatial basis vectors corresponding to the N CSI-RS resources, respectively, including:
  • the indication information is used to indicate the first index.
  • the method further includes: sending configuration information, the configuration information being used to determine the first parameter, the configuration information being used to indicate at least one of: the first parameter; the average value of the number of spatial basis vectors supported by the N CSI-RS resources; the average value of the number of spatial basis vectors supported by the Q CSI-RS resources.
  • the indication information is further used to indicate the N CSI-RS resources.
  • the second aspect is an implementation method of the first aspect on the opposite side, and the supplement, explanation and beneficial effects of the first aspect are also applicable to the second aspect and will not be repeated here.
  • a communication device which includes a processing module and a transceiver module, wherein the processing module is used to obtain the number of spatial basis vectors corresponding to N channel state information reference signal resources CSI-RS resources, respectively, the N CSI-RS resources are determined from Q CSI-RS resources, N is a positive integer less than or equal to Q, and Q is a positive integer greater than or equal to 1; the transceiver module is used to send indication information, and the indication information is used to indicate the number of spatial basis vectors corresponding to the N CSI-RS resources.
  • the processing module is used to obtain the number of spatial basis vectors corresponding to N channel state information reference signal resources CSI-RS resources, respectively, the N CSI-RS resources are determined from Q CSI-RS resources, N is a positive integer less than or equal to Q, and Q is a positive integer greater than or equal to 1;
  • the transceiver module is used to send indication information, and the indication information is used to indicate the number of spatial basis vectors corresponding to the N CSI-RS resources
  • the number of spatial basis vectors corresponding to each of the N CSI-RS resources is determined based on the total number of spatial basis vectors supported by the Q CSI-RS resources, and the total number of spatial basis vectors corresponding to each of the N CSI-RS resources is less than or equal to the total number of spatial basis vectors supported by the Q CSI-RS resources.
  • the processing module is also used to obtain a first parameter, where the first parameter is used to indicate the maximum value of the sum of the number of spatial basis vectors corresponding to the N CSI-RS resources respectively, and the first parameter is less than or equal to the sum of the number of spatial basis vectors supported by the Q CSI-RS resources.
  • the processing module is also used to determine the number of spatial basis vectors corresponding to the N CSI-RS resources respectively based on the first parameter.
  • the processing unit is used to obtain the number of spatial basis vectors corresponding to the N CSI-RS resources respectively, including: the processing module is used to obtain the number of spatial basis vectors corresponding to the N CSI-RS resources respectively according to the first parameter and a candidate set of values for the number of spatial basis vectors, the candidate set of values for the number of spatial basis vectors including at least one value, and any number of spatial basis vectors among the numbers of spatial basis vectors corresponding to the N CSI-RS resources respectively belongs to the candidate set of values for the number of spatial basis vectors.
  • the indication information used to indicate the number of spatial basis vectors corresponding to the N CSI-RS resources respectively includes: the indication information includes first indication information and second indication information, wherein the first indication information is used to indicate the sum of the number of spatial basis vectors corresponding to the N CSI-RS resources respectively, and the second indication information is used to indicate the number of spatial basis vectors corresponding to the N CSI-RS resources respectively.
  • the second indication information is used to indicate the spatial basis vectors corresponding to the N CSI-RS resources respectively.
  • the second indication information includes S bits, and S is determined based on the N, P and Ltot, wherein the P is the number of CSI-RS ports of the TRP corresponding to any CSI-RS resource among the N CSI-RS resources, and the Ltot is the sum of the number of spatial basis vectors corresponding to the N CSI-RS resources respectively.
  • the first indication information is carried in CSI part 1
  • the second indication information is carried in CSI part 2.
  • the indication information includes bits, the first bits or bits are used to indicate the number of spatial basis vectors corresponding to the N CSI-RS resources respectively. bits or Each bit bits correspond to the index of a spatial basis vector quantity in the candidate set of spatial basis vector quantity values, and Y is the number of elements contained in the candidate set of spatial basis vector quantity values.
  • the indication information includes bits, the bits are divided into Q groups, any of which includes bits, the Q groups correspond to the Q CSI-RS resources respectively, and the N groups of bits corresponding to the N CSI-RS resources are respectively used to indicate the index of the number of spatial basis vectors corresponding to the N CSI-RS resources respectively in the candidate set of values for the number of spatial basis vectors, and Y is the number of elements contained in the candidate set of values for the number of spatial basis vectors.
  • the processing unit is used to obtain the number of spatial basis vectors corresponding to the N CSI-RS resources respectively, including: the processing unit is used to obtain the number of spatial basis vectors corresponding to the N CSI-RS resources respectively according to the first parameter and the first corresponding relationship, and the first corresponding relationship is the correspondence between the first index and the number of spatial basis vectors corresponding to the N CSI-RS resources respectively.
  • the first correspondence relationship belongs to the second correspondence relationship
  • the second correspondence relationship includes at least two correspondence relationships
  • the at least two correspondence relationships include at least two indexes
  • the at least two indexes include the second index and a third index
  • the value of the second index is smaller than the value of the third index
  • the sum of the number of spatial basis vectors corresponding to the N CSI-RS resources corresponding to the second index is smaller than the sum of the number of spatial basis vectors corresponding to the N CSI-RS resources corresponding to the third index.
  • the indication information is used to indicate the number of spatial basis vectors corresponding to N CSI-RS resources respectively, including: the indication information is used to indicate the first index.
  • the transceiver module is further used to receive configuration information, where the configuration information is used to indicate at least one of the following:
  • the acquiring the first parameter includes: the processing module is further used to determine the first parameter according to the configuration information.
  • the indication information is further used to indicate the N CSI-RS resources.
  • the third aspect is an implementation method on the device side corresponding to the first aspect, and the supplement, explanation and beneficial effects of the first aspect are also applicable to the third aspect and will not be repeated here.
  • a communication device which includes a processing module and a transceiver module, wherein the transceiver module is used to receive indication information, the indication information is used to indicate the number of spatial basis vectors corresponding to N channel state information reference signal resources CSI-RS resources, the N CSI-RS resources are determined from Q CSI-RS resources, N is a positive integer less than or equal to Q, and Q is a positive integer greater than or equal to 1; the processing module is used to determine the precoding matrix according to the number of spatial basis vectors corresponding to the N CSI-RS resources.
  • the number of spatial basis vectors corresponding to the N CSI-RS resources is determined according to the sum of the number of spatial basis vectors supported by the Q CSI-RS resources, and the sum of the number of spatial basis vectors corresponding to the N CSI-RS resources is less than or equal to the sum of the number of spatial basis vectors supported by the Q CSI-RS resources.
  • the number of spatial basis vectors corresponding to the N CSI-RS resources is determined based on a first parameter, and the first parameter is used to indicate the maximum value of the sum of the number of spatial basis vectors corresponding to the N CSI-RS resources, and the first parameter is less than or equal to the sum of the number of spatial basis vectors supported by the Q CSI-RS resources.
  • the number of spatial basis vectors corresponding to the N CSI-RS resources respectively is determined based on the first parameter, including: the number of spatial basis vectors corresponding to the N CSI-RS resources respectively is determined based on the first parameter and a candidate set of values for the number of spatial basis vectors, the first candidate set of values for the number of spatial basis vectors includes at least one value, and any number of spatial basis vectors among the numbers of spatial basis vectors corresponding to the N CSI-RS resources respectively belongs to the candidate set of values for the number of spatial basis vectors.
  • the indication information used to indicate the number of spatial basis vectors corresponding to the N CSI-RS resources respectively includes: the indication information includes first indication information and second indication information, wherein the first indication information is used to indicate the sum of the number of spatial basis vectors corresponding to the N CSI-RS resources respectively, and the second indication information is used to indicate the number of spatial basis vectors corresponding to the N CSI-RS resources respectively.
  • the second indication information is used to indicate the spatial basis vectors corresponding to the N CSI-RS resources respectively.
  • the second indication information includes S bits, and the S bits are based on the The N, P and Ltot are determined, wherein P is the number of CSI-RS ports of the TRP corresponding to any CSI-RS resource among the N CSI-RS resources, and Ltot is the sum of the number of spatial basis vectors corresponding to the N CSI-RS resources respectively.
  • the first indication information is carried in CSI part 1
  • the second indication information is carried in CSI part 2.
  • the indication information includes bits, the first bit of the indication information bits or bits are used to indicate the number of spatial basis vectors corresponding to the N CSI-RS resources respectively. bits or Each bit bits correspond to the index of a spatial basis vector quantity in the candidate set of spatial basis vector quantity values, and Y is the number of elements contained in the candidate set of spatial basis vector quantity values.
  • the indication information includes bits, the bits are divided into Q groups, any of which includes bits, the Q groups correspond to the Q CSI-RS resources respectively, and the N groups of bits corresponding to the N CSI-RS resources are respectively used to indicate the index of the number of spatial basis vectors corresponding to the N CSI-RS resources in the candidate set of values for the number of spatial basis vectors.
  • the number of spatial basis vectors corresponding to the N CSI-RS resources respectively is determined based on a first parameter, including: the number of spatial basis vectors corresponding to the N CSI-RS resources respectively is determined based on the first parameter and a first corresponding relationship, and the first corresponding relationship is a correspondence between a first index and the number of spatial basis vectors corresponding to the N CSI-RS resources respectively.
  • the first correspondence relationship belongs to the second correspondence relationship
  • the second correspondence relationship includes at least two correspondence relationships
  • the at least two correspondence relationships include at least two indexes
  • the at least two indexes include the second index and a third index
  • the value of the second index is smaller than the value of the third index
  • the sum of the number of spatial basis vectors corresponding to the N CSI-RS resources corresponding to the second index is smaller than the sum of the number of spatial basis vectors corresponding to the N CSI-RS resources corresponding to the third index.
  • the indication information is used to indicate the number of spatial basis vectors corresponding to N CSI-RS resources respectively, including: the indication information is used to indicate the first index.
  • the transceiver module is further used to send configuration information, where the configuration information is used to determine the first parameter, and the configuration information is used to indicate at least one of the following:
  • the average value of the number of spatial basis vectors supported by the Q CSI-RS resources is the average value of the number of spatial basis vectors supported by the Q CSI-RS resources.
  • the indication information is also used to indicate the N CSI-RS resources.
  • the fourth aspect is an implementation method on the device side corresponding to the second aspect.
  • the supplement, explanation and beneficial effects of the second aspect are also applicable to the fourth aspect and will not be repeated here.
  • an embodiment of the present application provides a communication device, comprising an interface circuit and a processor, wherein the interface circuit is used to implement the function of the transceiver module in the third aspect, and the processor is used to implement the function of the processing module in the third aspect.
  • an embodiment of the present application provides a communication device, comprising an interface circuit and a processor, wherein the interface circuit is used to implement the function of the transceiver module in the fourth aspect, and the processor is used to implement the function of the processing module in the fourth aspect.
  • an embodiment of the present application provides a computer-readable medium storing a program code for execution on a terminal device, the program code comprising instructions for executing the method of the first aspect or the second aspect, or any possible manner in the first aspect or the second aspect, or all possible manners in the first aspect or the second aspect.
  • an embodiment of the present application provides a computer-readable medium storing a program code for execution by a network device, the program code comprising instructions for executing the method of the first aspect or the second aspect, or any possible manner in the first aspect or the second aspect, or all possible manners in the first aspect or the second aspect.
  • a computer program product storing computer-readable instructions, which, when the computer-readable instructions are executed on a computer, causes the computer to execute the method of the first aspect, or any possible manner of the first aspect, or all possible manners of the first aspect.
  • a computer program product storing computer-readable instructions, which, when the computer-readable instructions are executed on a computer, enables the computer to execute the method of the above-mentioned second aspect, or any possible method of the second aspect, or all possible methods of the second aspect.
  • a communication system which includes a device having a method for implementing the above-mentioned first aspect, or any possible manner in the first aspect, or all possible manners in the first aspect, and various possible designed functions, and a device having the second aspect, or any possible manner in the second aspect, or all possible manners in the second aspect, and various possible designed functions.
  • a processor is provided, which is coupled to a memory and is used to execute the method of the above-mentioned first aspect, or any possible manner in the first aspect, or all possible manners in the first aspect.
  • a processor is provided, which is coupled to a memory and is used to execute the method of the second aspect, or any possible manner of the second aspect, or all possible manners of the second aspect.
  • a chip system in a fourteenth aspect, includes a processor and may also include a memory for executing a computer program or instruction stored in the memory, so that the chip system implements the method in any of the first aspect or the second aspect, and any possible implementation of any aspect.
  • the chip system may be composed of a chip, or may include a chip and other discrete devices.
  • a computer program product storing computer-readable instructions, which, when the computer-readable instructions are executed on a computer, enables the computer to execute the method of the above-mentioned first aspect, or any possible method in the first aspect, or all possible methods in the first aspect.
  • a computer program product storing computer-readable instructions, which, when the computer-readable instructions are executed on a computer, enables the computer to execute the method of the above-mentioned second aspect, or any possible method of the second aspect, or all possible methods of the second aspect.
  • a communication system comprising at least one communication device as in the third aspect and/or at least one communication device as in the fourth aspect, the communication system being used to implement the above-mentioned first aspect or second aspect, or any possible manner in the first aspect or second aspect, or all possible manners of implementation in the first aspect or second aspect.
  • FIG1 shows a schematic diagram of the architecture of a communication system applicable to an embodiment of the present application.
  • FIG. 2 shows a schematic diagram of a protocol architecture of a communication device.
  • FIG3 shows a schematic diagram of a channel measurement process.
  • FIG. 4 is a schematic diagram showing yet another channel measurement process.
  • FIG5 shows a schematic diagram of a channel state parameter reporting method proposed in an embodiment of the present application.
  • FIG6 shows a schematic diagram of another channel state parameter reporting method proposed in an embodiment of the present application.
  • FIG. 7 shows a schematic block diagram of a communication device proposed in an embodiment of the present application.
  • FIG8 shows a schematic block diagram of another communication device provided in an embodiment of the present application.
  • the technical solutions of the embodiments of the present application can be applied to various communication systems, such as: the fifth generation (5th generation, 5G) or new radio (new radio, NR) system, long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD) system, etc.
  • the technical solutions provided by the present application can also be applied to future communication systems, such as the sixth generation mobile communication system.
  • the technical solutions provided by the present application can also be applied to device to device (D2D) communication, vehicle to everything (V2X) communication, machine to machine (M2M) communication, machine type communication (MTC), and Internet of things (IoT) communication system or other communication systems.
  • D2D device to device
  • V2X vehicle to everything
  • M2M machine to machine
  • MTC machine type communication
  • IoT Internet of things
  • the terminal device in the embodiment of the present application can be a device that provides voice/data to the user, for example, a handheld device with wireless connection function, a vehicle-mounted device, etc.
  • some examples of terminals are: mobile phones, tablet computers, laptop computers, PDAs, mobile Internet devices (MID), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDA), handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, wearable devices,
  • PLMN public land mobile network
  • the terminal device may also be a wearable device.
  • Wearable devices may also be referred to as wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also powerful functions achieved through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-sized, and fully or partially independent of smartphones, such as smart watches or smart glasses, as well as devices that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various types of smart bracelets and smart jewelry for vital sign monitoring.
  • the terminal device can also be a terminal device in an IoT system.
  • IoT is an important part of the future development of information technology. Its main technical feature is to connect objects to the network through communication technology, thereby realizing an intelligent network that interconnects people and machines and things.
  • the device for realizing the function of the terminal device can be the terminal device, or it can be a device that can support the terminal device to realize the function, such as a chip system or a chip, which can be installed in the terminal device.
  • the chip system can be composed of a chip, or it can include a chip and other discrete devices.
  • the network device in the embodiments of the present application may be a device for communicating with a terminal device.
  • the network device may be an evolved NodeB (eNB or eNodeB) in an LTE system, or a wireless controller in a cloud radio access network (CRAN) scenario, or the network device may be a relay station, an access point, a vehicle-mounted device, a wearable device, a network device in a 5G network, or a network device in a future evolved PLMN network, one or a group of antenna panels (including multiple antenna panels) of a base station in a 5G system, or a network node constituting a gNB or a transmission point, such as a baseband unit (BBU), or a distributed unit (DU), etc., which is not limited by the embodiments of the present application.
  • eNB evolved NodeB
  • CRAN cloud radio access network
  • the network device may be a relay station, an access point, a vehicle-mounted device, a wearable device, a network device
  • the gNB may include a centralized unit (CU) and a DU.
  • the gNB may also include an active antenna unit (AAU).
  • the CU implements some of the gNB functions, and the DU implements some of the gNB functions.
  • the CU is responsible for processing non-real-time protocols and services, and implements the functions of the radio resource control (RRC) and packet data convergence protocol (PDCP) layers.
  • the DU is responsible for processing physical layer protocols and real-time services, and implements the functions of the radio link control (RLC), media access control (MAC) and physical (PHY) layers.
  • the AAU implements some physical layer processing functions, RF processing, and related functions of active antennas.
  • the network device may be a device including one or more of a CU node, a DU node, and an AAU node.
  • the CU may be classified as a network device in an access network (radio access network, RAN), or the CU may be classified as a network device in a core network (core network, CN), and this application does not limit this.
  • the terminal device or network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer.
  • the hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and a memory (also called main memory).
  • the operating system can be any one or more computer operating systems that implement business processing through a process, such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a Windows operating system.
  • the application layer includes applications such as a browser, an address book, a word processing software, and an instant messaging software.
  • the embodiment of the present application does not specifically limit the specific structure of the execution subject of the method provided in the embodiment of the present application.
  • the execution subject of the method provided in the embodiment of the present application can be a terminal device or a network device, or a functional module in the terminal device or the network device that can call and execute a program.
  • FIG1 shows a schematic diagram of a communication scenario applicable to an embodiment of the present application.
  • the communication system in FIG1 may include at least one terminal device (e.g., terminal device 110, terminal device 120, terminal device 130, terminal device 140, terminal device 150, and terminal device 160) and a network device 170.
  • the network device 170 is used to provide communication services for the terminal device and access the core network.
  • the terminal device can access the network by searching for synchronization signals, broadcast signals, etc. sent by the network device 170, thereby establishing communication with the network device.
  • the terminal device 110, terminal device 120, terminal device 130, terminal device 140, and terminal device 160 in FIG1 can perform uplink and downlink transmission with the network device 170.
  • the network device 170 can send downlink data to the terminal device 110, terminal device 120, terminal device 130, terminal device 140, and terminal device 160, and can also receive downlink data from the terminal device 110, terminal device 120, terminal device 130, terminal device 140, and terminal device 160. Uplink data sent.
  • terminal device 140 , terminal device 150 and terminal device 160 may also be viewed as a communication system.
  • Terminal device 160 may send downlink data to terminal device 140 and terminal device 150 , and may also receive uplink data sent by terminal device 140 and terminal device 150 .
  • the communication system may include one or more network devices.
  • One network device may send data to one or more terminal devices.
  • Multiple network devices may also send data to one or more terminal devices at the same time.
  • FIG2 is a modular structure diagram of each network element in FIG1.
  • the network device 110 includes an RRC signaling interaction module, a MAC signaling interaction module, and a PHY signaling and data interaction module.
  • the terminal device 120 also includes an RRC signaling interaction module, a MAC signaling interaction module, and a PHY signaling and data interaction module.
  • the RRC signaling interaction module of the network device 110 is communicatively connected with the RRC signaling interaction module of the terminal device 120 to realize the sending and receiving of RRC signaling.
  • the MAC signaling interaction module of the network device 110 is communicatively connected with the MAC signaling interaction module of the terminal device 120 to realize the sending and receiving of MAC control unit (MAC control element, MAC-CE) signaling.
  • MAC control unit MAC control element, MAC-CE
  • the PHY signaling and data interaction module of the network device 110 is communicatively connected with the PHY signaling and data interaction module of the terminal device 120, so that the network device 110 can transmit a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) to the terminal device 120.
  • the network device 110 can also receive a physical uplink control channel (PUCCH) and a physical uplink shared channel (PUSCH) sent from the terminal device 120.
  • PUCCH physical downlink control channel
  • PUSCH physical uplink shared channel
  • 5G communication systems have higher requirements for system capacity and spectrum efficiency.
  • network equipment often needs to obtain channel state information (CSI) of uplink and downlink channels to ensure system performance.
  • CSI channel state information
  • FDD massive MIMO systems accurate acquisition of downlink CSI is one of the key factors to ensure efficient operation of the system.
  • FDD systems have a large frequency interval between uplink and downlink channels, and the uplink and downlink channels are not completely reciprocal, making it impossible for FDD systems to obtain complete downlink channels through uplink channel estimation.
  • FIG3 is a schematic diagram of the basic process of a network device acquiring the CSI of a downlink channel in a traditional FDD system.
  • the terminal device is required to feedback the CSI of the downlink channel to the network device (e.g., a base station or gNB), and the basic process is shown in FIG3.
  • the network device needs to first send channel measurement configuration information to the terminal device to configure the channel measurement, such as informing the terminal device of the time and behavior of the channel measurement.
  • the network device then sends CSI-RS (also generally referred to as a pilot) to the terminal device for channel measurement.
  • CSI-RS also generally referred to as a pilot
  • the terminal device measures the channel according to the received CSI-RS, calculates the final CSI feedback amount, and then feeds back the CSI of the downlink channel to the network device.
  • the network device determines the precoding information of the downlink data based on the CSI fed back by the terminal device, thereby precoding and sending the downlink data, that is, the network device can schedule the downlink data according to the fed-back CSI, such as transmitting PDCCH and PDSCH to the terminal device.
  • CSI is information reported by the receiving end (such as a terminal device) to the transmitting end (such as a network device) in a wireless communication system to describe the channel properties of the communication link.
  • CSI includes but is not limited to channel quality indicator (CQI), precoding matrix indicator (PMI), rank indicator (RI), CSI-RS resource indicator (CRI), layer indicator (LI) and other parameters.
  • CQI channel quality indicator
  • PMI precoding matrix indicator
  • RI rank indicator
  • CRI CSI-RS resource indicator
  • LI layer indicator
  • CSI may include one or more of the items listed above, and may also include other information used to characterize CSI in addition to the above-mentioned items, and this application does not limit this.
  • the network device cannot obtain the complete downlink channel by estimating the uplink channel.
  • the terminal device needs to report the CSI of the downlink channel to the network device so that the network device can determine the downlink channel matrix or determine the precoding matrix.
  • the basic process of the terminal device reporting the CSI of the downlink channel to the network device can include the following steps:
  • the network device sends configuration information to the terminal device.
  • the configuration information is used for measurement configuration of the downlink channel, such as the measurement time of the downlink channel, the measurement behavior of the downlink channel, etc.
  • the network device sends a reference signal (RS), such as CSI-RS, to the terminal device.
  • RS reference signal
  • the RS is used for measuring the downlink channel.
  • the terminal device measures the downlink channel according to the configuration information and RS to obtain the CSI of the downlink channel.
  • the terminal device reports the CSI of the downlink channel to the network device.
  • the network device determines the downlink channel matrix or precoding matrix according to the CSI of the downlink channel.
  • the terminal device can obtain the CSI of the downlink channel based on the reciprocity of some information between the uplink channel and the downlink channel, and report the CSI of the downlink channel to the network device, so that the network device can determine The downlink channel matrix or the precoding matrix is determined.
  • the basic process of the terminal device reporting the CSI of the downlink channel to the network device may include the following steps:
  • the network device estimates the uplink channel and obtains part of the downlink channel information based on the estimated uplink channel information, such as the angle information and delay information of the downlink channel;
  • the network device sends RS, such as CSI-RS, to the terminal device.
  • RS such as CSI-RS
  • the RS includes angle information and delay information of the downlink channel.
  • the terminal device measures the downlink channel according to the RS to obtain the CSI of the downlink channel.
  • the terminal device reports the CSI of the downlink channel to the network device.
  • the network device determines the downlink channel matrix or precoding matrix according to the CSI of the downlink channel, the angle information and the delay information of the downlink channel.
  • the network device first calculates the CSI-RS precoding weight according to the angle and delay information of the uplink channel, and sends the precoded CSI-RS loaded with the angle delay information; the terminal device measures the CSI-RS, obtains the PMI information, and feeds it back to the network device; the network device then determines the downlink channel matrix or precoding matrix based on the PMI information fed back by the terminal device and the angle delay information.
  • eType-II codebook is the spatial matrix composed of 2L spatial basis vectors for spatial compression shared by all transmission layers (polarization shared), and P is the number of CSI-RS ports; is the frequency domain matrix composed of M v frequency domain basis vectors for frequency domain compression corresponding to each layer, and N 3 is the number of subbands or frequency domain units;
  • the partial reciprocity of the FDD uplink and downlink channels can be used to select the codebook by port.
  • is the port selection matrix, indicating that K 1 ports are selected from P ports, and K 1 2L, and the same L ports are selected from P/2 ports in each polarization direction, and P is the number of CSI-RS ports;
  • the 2LM linear combination coefficients corresponding to the port and frequency domain basis vectors, the terminal device needs to select several non-zero coefficients to report, and the non-zero coefficients to be reported are indicated by bitmap.
  • UCI part1 (also called CSI part 1) includes RI, CQI and the total number of non-zero coefficients of all transmission layers;
  • UCI part2 (also called CSI part 2) includes spatial basis vector indication information, spatial oversampling factor, frequency domain basis vector indication information, strongest coefficient indication information, non-zero coefficient position indication bitmap and quantized non-zero coefficients.
  • the network device determines the precoding matrix applied to the downlink data based on the CSI reported by the terminal device.
  • a multi-station collaboration method can be used to allow multiple TRPs to serve one terminal device.
  • multi-station collaboration such as coherent joint transmission (CJT) and non-coherent joint transmission (NCJT).
  • CJT coherent joint transmission
  • NCJT non-coherent joint transmission
  • CJT coherent joint transmission
  • NJT non-coherent joint transmission
  • multiple TRPs serve the terminal device at the same time, and the transmission is transparent to the terminal device. From the perspective of the terminal device, multiple TRPs in the collaboration set can be equivalent to a large base station. Therefore, the terminal device needs to jointly feedback the CSI of each TRP in the collaboration set to enable coherent collaborative transmission.
  • Rel-18 TS 38.214 Release 18 focuses on the CJT codebook enhancement based on Rel-16 eType-II/Rel-17 FeType-II.
  • N is the collaborative TRP
  • N is the number of TRPs participating in the cooperative transmission
  • W 1,n is the spatial matrix or port selection matrix of the nth TRP
  • Wf ,n is the frequency domain matrix of the nth TRP
  • Wf is the frequency domain matrix shared by N TRPs
  • ( ⁇ ) H represents the conjugate transpose operation.
  • the main difference is whether each TRP has its own frequency domain matrix or N TRPs share the same frequency domain matrix.
  • the number of spatial basis vectors or the number of selected ports Ln for each TRP can be the same or different. So it is different.
  • the value of the number of spatial basis vectors L is configured by the network side through signaling.
  • the value of L is bound to the values of other parameters.
  • the protocol predefines multiple sets of candidate parameter combinations.
  • the network side determines the value of L by configuring the parameter combination index.
  • the parameter combination list defined by the Rel-16 eType-II codebook is shown in Table 1:
  • L is the number of selected spatial domain basis vectors
  • ⁇ is the number of transmitted layers
  • p ⁇ is used to determine the number M ⁇ of selected frequency domain basis vectors
  • ⁇ is used to determine the maximum number of non-zero coefficients allowed to be reported by the terminal.
  • the terminal device reports the index value to the network side, and the network side can determine the value of L based on the index value.
  • this reporting method can only be used for the number of spatial basis vectors of a certain TRP.
  • the distance difference between the TRP participating in the collaboration and the terminal device may cause a large difference in the channel between the TRP participating in the collaboration and the terminal device.
  • the terminal device selects the number of spatial basis vectors corresponding to each TRP in the TRP participating in the collaboration, there may be a large difference between the number of spatial basis vectors corresponding to different TRPs.
  • the parameter configuration and reporting method in the prior art cannot enable the network side to obtain the number of spatial basis vectors of different TRPs. Furthermore, the network side cannot determine the channel status of different TRPs, which affects the communication quality.
  • an embodiment of the present application proposes a method for reporting channel state parameters, which is applicable to scenarios of collaborative communication of multiple TRPs. After the terminal device determines the number of spatial basis vectors corresponding to each of the multiple TRPs, it reports it to the network device, so that the network device can obtain the number of spatial basis vectors corresponding to each of the multiple TRPs, thereby enabling the network device to determine the precoding matrix of each of the multiple TRPs.
  • the communication method can be applied to the indication of the number of spatial basis vectors corresponding to each of the multiple TRPs in the CJT codebook based on Rel-16Type-II in Rel-18, and the indication of the number of selected ports corresponding to each of the multiple TRPs in the CJT codebook based on Rel-17Type-II in Rel-18, or in other words, the scenarios involving the numerical indication of parameters such as the number of spatial basis vectors and the number of ports that can reflect channel state information, the scheme of the present application can be applicable, and the present application does not limit this.
  • the following description of the solution of the present application takes the interaction between a terminal device and a network device as an example, but the present application does not limit the execution subject.
  • the solution of the present application can also be applied to the interaction between terminal devices and terminal devices, or the interaction between network devices and network devices. As shown in FIG5 , the method includes the following steps:
  • Step 501 The terminal device obtains the number of spatial basis vectors corresponding to N CSI-RS resources.
  • one CSI-RS resource corresponds to one TRP.
  • N TRPs correspond one to one with N CSI-RS resources.
  • TRP or "CSI-RS resource” can be used to describe or indicate a TRP, and in an embodiment of the present application, “TRP” and “CSI-RS resource” can be used interchangeably.
  • the N CSI-RS resources can be determined from Q CSI-RS resources. It can be understood that N is a positive integer less than or equal to Q, and Q is a positive integer greater than or equal to 1. In other words, these Q CSI-RS resources can be regarded as a candidate set of CSI-RS resources, and these N CSI-RS resources belong to these Q CSI-RS resources.
  • These Q CSI-RS resources can be predefined by the protocol or indicated by the network device to the terminal device, and this application does not limit this.
  • the terminal device determines N CSI-RS resources, for example, the terminal device selects N CSI-RS resources from Q CSI-RS resources.
  • Q is 4, and the terminal device can select all 4 CSI-RS resources, or select a part of these 4 CSI-RS resources, such as selecting 3 of them. That is, the terminal device can select all 4 TRPs as collaborative TRPs, or select a part of these 4 TRPs as collaborative TRPs. This application does not limit this.
  • One CSI-RS resource corresponds to one number of spatial basis vectors.
  • the terminal device selects a certain number of spatial basis vectors for each TRP participating in the collaborative transmission. That is, each TRP participating in the collaborative transmission corresponds to a certain number of spatial basis vectors.
  • the number of spatial basis vectors corresponding to each of the N TRPs is the sum of the number of spatial basis vectors supported by the Q TRPs. Determined, for example, the sum of the number of spatial basis vectors corresponding to the N TRPs is less than or equal to the sum of the number of spatial basis vectors supported by the Q TRPs.
  • the sum of the number of spatial basis vectors supported by the Q TRPs can be understood as the sum of the number of spatial basis vectors corresponding to the Q TRPs.
  • Q takes a value of 4
  • the Q TRPs include TRP#1, TRP#2, TRP#3, and TRP#4.
  • each TRP can support up to 6 spatial basis vectors, and the sum of the number of spatial basis vectors supported by the 4 TRPs is 24.
  • the number of spatial basis vectors corresponding to the N TRPs is determined based on a first parameter.
  • the first parameter is used to indicate the maximum value of the sum of the number of spatial basis vectors corresponding to the N TRPs, and the first parameter is less than or equal to the sum of the number of spatial basis vectors supported by the Q TRPs.
  • the first parameter can be understood as an upper limit on the number of spatial basis vectors selected by the terminal device.
  • the first parameter can be as large as the sum of the number of spatial basis vectors supported by Q TRPs. For example, Q is 4, N is 3, and the sum of the number of spatial basis vectors supported by the four TRPs is 24, and the first parameter can be less than or equal to 24.
  • the first parameter can be 16, then when the terminal device selects the number of spatial basis vectors corresponding to the three TRPs, it needs to make sure that the sum of the number of spatial basis vectors corresponding to the three TRPs is less than or equal to 16.
  • the three TRPs are: TRP#1, TRP#2, TRP#3, TRP#1 corresponds to 4 spatial basis vectors, TRP#2 corresponds to 6 spatial basis vectors, and TRP#3 corresponds to 6 spatial basis vectors.
  • TRP#1 corresponds to 6 spatial basis vectors
  • TRP#2 corresponds to 2 spatial basis vectors
  • TRP#3 corresponds to 4 spatial basis vectors, and so on.
  • the sum of the spatial basis vectors corresponding to the three TRPs can be less than or equal to 16.
  • the first parameter may be determined according to configuration information.
  • the network device sends configuration information to the terminal device, and correspondingly, the terminal device receives the configuration information.
  • the configuration information is used to indicate at least one of the following:
  • the first parameter is the first parameter
  • the first parameter indicated by the configuration information may directly indicate the value of the first parameter, or may indicate the index corresponding to the value of the first parameter.
  • the first parameter may have multiple value candidates, each value candidate corresponding to an index.
  • the terminal device may determine the first parameter according to the configuration information.
  • the network device indicates the average value without determining N
  • the terminal device can determine the sum of the number of spatial basis vectors based on the average value and the value of N selected by the terminal device.
  • the sum of the number of spatial basis vectors is variable, such as changing according to the value of N.
  • the terminal device can determine the size of the first parameter based on the average value and the number of selected TRPs N. For example, if N is 2, and the average value of the number of spatial basis vectors supported by 2 TRPs is 4, then the terminal device can determine the first parameter to be 8.
  • the network device specifies the sum of the number of spatial basis vectors of Q TRPs, which is equivalent to determining the upper limit of the sum of the number of spatial basis vectors of N TRPs, and the upper limit does not change with the value of N.
  • the terminal device can determine the size of the first parameter based on the average value and the number of configured TRPs Q. For example, Q is 4, and the average value of the number of spatial basis vectors supported by 4 TRPs is 2, then the terminal device can determine the first parameter to be 8.
  • the above average value may be determined by the network device, and optionally, the network device may determine the above average value by referring to a value in a candidate set of average values. Optionally, the network device may determine the above average value by referring to a candidate set of spatial basis vector quantities.
  • Method 1 The terminal device obtains the number of spatial basis vectors corresponding to N TRPs according to the first parameter and the candidate set of values of the number of spatial basis vectors.
  • the candidate set of values for the number of spatial basis vectors can be understood as candidates for the values that can be selected for the number of spatial basis vectors, and is not necessarily presented in the form of a set.
  • the candidate set of values for the number of spatial basis vectors is The value representing the number of spatial basis vectors can be 1, 2, 4, or 6.
  • the candidate sets of spatial basis vector value candidates in the following text are all based on this example, but it should be understood that the candidate sets of spatial basis vector value candidates are not limited to this. For example, it can be or, Etc.
  • the candidate set of values for the number of spatial basis vectors may be predefined by a protocol, may be preconfigured, or may be indicated, and this application does not limit this.
  • the number of spatial basis vectors corresponding to each TRP can be determined from a candidate set of values for the number of spatial basis vectors. For example, when N is 3, the three TRPs are: TRP#1, TRP#2, and TRP#3. Among them, the number of spatial basis vectors corresponding to each TRP has four optional values: 1, 2, 4, and 6.
  • the terminal device can determine the number of spatial basis vectors corresponding to the N TRPs respectively according to the first parameter and the candidate set of values for the number of spatial basis vectors.
  • the first parameter value is 16, and the candidate set of values for the number of spatial basis vectors is The value of N is 3.
  • the three TRPs are: TRP#1, TRP#2, and TRP#3, wherein the number of spatial basis vectors corresponding to each TRP has four optional values: 1, 2, 4, and 6.
  • the sum of the number of spatial basis vectors corresponding to the three TRPs needs to be less than or equal to the first parameter, that is, 16, at least the number of spatial basis vectors corresponding to the three TRPs cannot all be 6.
  • the number of spatial basis vectors corresponding to TRP#1 can be 6, the number of spatial basis vectors corresponding to TRP#2 can be 6, and the number of spatial basis vectors corresponding to TRP#3 can be 4.
  • the sum of the number of spatial basis vectors corresponding to the three TRPs is 16, which meets the requirement of being less than or equal to 16.
  • the number of spatial basis vectors corresponding to TRP#1 can be 2, the number of spatial basis vectors corresponding to TRP#2 can be 6, and the number of spatial basis vectors corresponding to TRP#3 can be 4.
  • the sum of the number of spatial basis vectors corresponding to the three TRPs is 12, which can also meet the requirement of being less than or equal to 16. It should be understood that there are many other numerical selection methods, which are not enumerated one by one.
  • Method 2 The terminal device obtains the number of spatial basis vectors corresponding to N TRPs respectively according to the first parameter and the first corresponding relationship.
  • the first parameter can refer to the above description and will not be repeated here.
  • the first corresponding relationship is the corresponding relationship between the first index and the number of spatial basis vectors corresponding to the N TRPs.
  • N is 2, and the two TRPs are: TRP#1 and TRP#2, where the number of spatial basis vectors corresponding to TRP#1 is 6, and the number of spatial basis vectors corresponding to TRP#2 is 4.
  • the number of spatial basis vectors corresponding to these two TRPs can be regarded as a value combination, and the value combination can correspond to an index, such as an index of 0.
  • an index of 0 can represent that the number of spatial basis vectors corresponding to TRP#1 is 6, and the number of spatial basis vectors corresponding to TRP#2 is 4.
  • the first correspondence belongs to the second correspondence
  • the second correspondence includes at least two correspondences
  • the at least two correspondences include at least two indexes
  • the at least two indexes include a second index and a third index
  • the value of the second index is less than the value of the third index
  • the sum of the number of spatial basis vectors corresponding to the N TRPs corresponding to the second index is less than the sum of the number of spatial basis vectors corresponding to the N TRPs corresponding to the third index.
  • N takes a value of 2
  • the two TRPs are: TRP#1 and TRP#2.
  • the number of spatial basis vectors corresponding to TRP#1 is 6, the number of spatial basis vectors corresponding to TRP#2 is 4, and the corresponding index #1 is 0; the other value combination is: the number of spatial basis vectors corresponding to TRP#1 is 6, the number of spatial basis vectors corresponding to TRP#2 is 6, and the corresponding index #2 is 1.
  • index values, N values, and the number of spatial basis vectors are only examples and not limitations.
  • first correspondence relationship and/or second correspondence relationship can be determined by the network device, can be determined by the terminal device, can be predefined by the protocol, or can be indicated.
  • the network device indicates the first correspondence relationship and/or the second correspondence relationship to the terminal device.
  • the second correspondence relationship may be presented in the form of a table.
  • the second correspondence relationship is shown in Table 2 to Table 5:
  • L1, L2, L3, and L4 represent the number of spatial basis vectors corresponding to different TRPs. In order to keep the application document concise, all value combinations are not enumerated one by one in the table, and ellipsis is used instead.
  • the larger index corresponds to the sum of the number of basis vectors in the larger airspace
  • the smaller index corresponds to the smaller airspace.
  • the values corresponding to index 254 are 4, 6, 6, 6, and the sum of the four values is 22; the values corresponding to index 255 are 6, 6, 6, 6, and the sum of the four values is 24. 254 is less than 255, and 22 is less than 24. It should be noted that when the sum of the values is the same, the size relationship between the indexes is not limited.
  • indexes 251 to 254 are 22. These indexes can be replaced with each other.
  • 251 can correspond to the value combination 4, 6, 6, 6.
  • the order of the rows of combinations with the same sum of values can be swapped, and there is no limit on this. It can be seen here that the table contains all possible value combinations, and the terminal device can independently select the number of spatial basis vectors corresponding to the N TRPs.
  • Tables 2 to 5 are only used as examples and not as limitations. For example, in a specific application, only a part of the table is used for implementation. For example, in order to save costs, only a part of the table may be implemented, which may be several consecutive rows or several discontinuous rows, and this is not limited.
  • Tables 2 to 5 may be determined by the network device, may be determined by the terminal device, may be predefined by the protocol, or may be indicated, for example, the network device indicates to the terminal device after determining.
  • the embodiment of the present application does not limit this.
  • the above correspondence relationship should be known to the network device and the terminal device, so that when indicating the index, both parties can determine the content corresponding to the index.
  • Step 502 The terminal device sends indication information to the network device, and correspondingly, the network device receives the indication information.
  • the indication information is used to indicate the number of spatial basis vectors corresponding to the N TRPs respectively.
  • the following describes in detail the indication method of the terminal device corresponding to the different methods in which the terminal device obtains the number of spatial basis vectors corresponding to N TRPs in step 501.
  • the indication information may include first indication information and second indication information, wherein the first indication information is used to indicate the sum of the number of spatial basis vectors corresponding to the N TRPs, and the second indication information is used to indicate the number of spatial basis vectors corresponding to the N TRPs.
  • the second indication information may be used to indicate the spatial basis vectors corresponding to the N TRPs, and the network device may determine the number of spatial basis vectors corresponding to the N TRPs upon receiving the second indication information.
  • the second indication information is a combination number composed of multiple bits.
  • the sum of the number of spatial basis vectors corresponding to the above-mentioned N TRPs can be used to determine the overhead of the second indication information.
  • the number of bits B of the second indication information can be determined based on the sum of the number of spatial basis vectors Ltot corresponding to the N TRPs, the value of N and the value of P, where P is the number of CSI-RS ports of the TRP corresponding to any TRP among the N TRPs.
  • the full set of spatial basis vectors includes 4 optional basis vectors.
  • 4 basis vectors need to be selected from the 8 basis vectors, and there are 70 possibilities in total, so B is equal to 7.
  • the second indication information includes 7 bits, and these 7 bits can clearly indicate all the selection schemes (i.e., 70 possibilities) of the spatial basis vectors corresponding to the 2 TRPs respectively.
  • the second indication information can indicate one of them.
  • the terminal device indicates a selection scheme of basis vectors to the network device.
  • the 8 basis vectors are basis vector #1, basis vector #2, basis vector #3, basis vector #4, basis vector #1, basis vector #2, basis vector #3, and basis vector #4. There are 70 possible combinations of basis vectors, and only a few of them are given here.
  • the selected first TRP corresponds to basis vector #1 and basis vector #2
  • the selected second TRP corresponds to basis vector #1 and basis vector #2, which can be indicated by 0000001
  • the selected first TRP corresponds to basis vector #1
  • the selected second TRP corresponds to basis vector #4, basis vector #1, and basis vector #3, which can be indicated by 0000010, and so on.
  • the second indication information is 0000010, then the network device can determine based on the indication information: the basis vector corresponding to the selected first TRP is basis vector #1, and the basis vectors corresponding to the selected second TRP are basis vector #4, basis vector #1, and basis vector #3.
  • the terminal device can also indicate the selected N TRPs to the network device through indication information.
  • the terminal device can indicate N TRPs out of Q TRPs through a bitmap. For example, if Q is 4 and N is 2, the bitmap can include 4 bits. The value of each bit is used to indicate whether a TRP is selected or not. For example, a bitmap of 0101 can be used to indicate that the two TRPs selected by the terminal device are TRP#2 and TRP#4 respectively.
  • the network device can combine the indication information 0000010 indicating the basis vector and the bitmap to determine the spatial basis vectors corresponding to the two TRPs, and further determine the number of spatial basis vectors corresponding to the two TRPs.
  • the above bitmap is 0101, indicating that the two selected TRPs are TRP#2 and TRP#4, and TRP#2 is in front and is the first TRP selected. Then TRP#2 corresponds to basis vector #1, and TRP#4 corresponds to basis vector #4, basis vector #1, and basis vector #3. Further, the network device can determine that the number of spatial basis vectors corresponding to TRP#2 is 1, and the number of spatial basis vectors corresponding to TRP#4 is 3.
  • the first indication information may be CSI part 1
  • the second indication information may be CSI part 2.
  • the terminal device indicates the selected spatial basis vectors to the network device, and the network device can determine the number of spatial basis vectors corresponding to the N TRPs respectively without the need for additional reporting, thus saving indication overhead.
  • the indication information #A may include bits. bits or bits are used to indicate the number of spatial basis vectors corresponding to the N TRPs. bits or Each bit bits correspond to the index of a spatial basis vector quantity in the candidate set of spatial basis vector quantity values, where Y is the number of elements contained in the candidate set of spatial basis vector quantity values.
  • the indication information may include 8 bits.
  • the first 4 bits or the last 4 bits of the indication information are used to indicate the number of spatial basis vectors corresponding to the two TRPs.
  • the value of 1 corresponds to index 0
  • the value of 2 corresponds to index 1
  • the value of 4 corresponds to index 2
  • the value of 6 corresponds to index 3.
  • the first 4 bits are taken as an example below.
  • the indication information is 0100XXXX.
  • 01 is used to indicate that the index of the number of spatial basis vectors corresponding to the first TRP in the candidate set of spatial basis vector value is 1, that is, the number of spatial basis vectors corresponding to the first TRP is 2; 01 is used to indicate that the index of the number of spatial basis vectors corresponding to the second TRP in the candidate set of spatial basis vector value is 0, then the number of spatial basis vectors corresponding to the second TRP is 1. At present, it is still impossible to determine which TRP corresponds to the number of spatial basis vectors of 1 and which TRP corresponds to the number of spatial basis vectors of 2.
  • XXXX can be 0000, or they can be all set to 1, for example, XXXX can be 1111, and this application does not limit this.
  • the network device may not parse them.
  • the terminal device can also indicate the two determined TRPs to the network device through the indication information.
  • the terminal device can also indicate to the network device which two determined TRPs are through the indication information.
  • the indication information can be a bitmap, and reference can be made to the description of the bitmap in the above method 1, which will not be repeated here. For example, if the bitmap is 0101, the network device can determine that the number of spatial basis vectors corresponding to TRP#2 is 2, and the number of spatial basis vectors corresponding to TRP#4 is 1.
  • the indication information #B may include bits, bits are divided into Q groups, any of which includes bits, and these Q groups correspond to Q TRPs respectively, wherein the N groups of bits corresponding to N TRPs are respectively used to indicate the index of the number of spatial basis vectors corresponding to the N TRPs in the candidate set of spatial basis vector value values, and Y is the number of elements contained in the candidate set of spatial basis vector value values.
  • the indication information may include 8 bits.
  • the value 1 corresponds to index 0
  • the value 2 corresponds to index 1
  • the value 4 corresponds to index 2
  • the value 6 corresponds to index 3.
  • These 8 bits are divided into 4 groups, and the 2 bits in each group are used to indicate the index of the number of spatial basis vectors corresponding to a TRP in the candidate set of spatial basis vector number values.
  • the 8 bits are 00010011.
  • the terminal device can also indicate the two determined TRPs to the network device through the indication information.
  • the terminal device can also indicate to the network device which two determined TRPs are through the indication information.
  • the indication information can be a bitmap, and reference can be made to the description of the bitmap in the above method 1, which will not be repeated here. For example, if the bitmap is 0101, the network device can determine that the TRPs selected by the terminal device are TRP#2 and TRP#4.
  • the network device can determine the number of spatial basis vectors corresponding to the two TRPs by combining the bitmap and the above 8 bits.
  • 00010011 01 is used to indicate that the number of spatial basis vectors corresponding to TRP#2 has an index of 1 in the candidate set of spatial basis vector values, that is, the number of spatial basis vectors corresponding to TRP#2 is 2, and 11 is used to indicate that the number of spatial basis vectors corresponding to TRP#4 has an index of 3 in the candidate set of spatial basis vector values, that is, the number of spatial basis vectors corresponding to TRP#4 is 6.
  • the first two 00s and the fifth and sixth 00s have no meaning.
  • the first two 00s and the fifth and sixth 00s correspond to the positions of the unselected TRPs.
  • the values of the bits corresponding to the unselected TRPs can be customized, such as being set to 0, or all set to 1, and this application does not limit this.
  • the network device may not parse them.
  • the indication information in the above-mentioned method 2 and method 3 can be carried in CSI part 1.
  • Mode 4 corresponding to the mode 2 in step 502, the indication information can be used to indicate the index in the first corresponding relationship.
  • the indication information can be used to indicate an index in the table. For example, if N is 2, the indication information can be used to indicate an index in Table 3, and the index corresponds to a value combination.
  • the overhead of this index number is
  • Ln is the number of spatial basis vectors corresponding to each TRP, and Lmax is the first parameter.
  • the terminal device can use part of the protocol predefined table when reporting the Ln value combination, thereby reducing the overhead of reporting the index in the indication information.
  • the terminal device can also indicate the two determined TRPs to the network device through the indication information.
  • the terminal device can also indicate to the network device which two determined TRPs are through the indication information.
  • the indication information can include a bitmap, and reference can be made to the description of the bitmap in the above method 1, which will not be repeated here. For example, if the bitmap is 0101, the network device can determine that the TRPs selected by the terminal device are TRP#2 and TRP#4.
  • the network device can determine the number of spatial basis vectors corresponding to TRP#2 and TRP#4 respectively.
  • the bitmap can be carried in the first indication information.
  • Step 503 The network device determines a precoding matrix according to the number of spatial basis vectors corresponding to the N CSI-RS resources.
  • the manner in which the network device determines the precoding matrix may refer to the foregoing description, which will not be repeated here.
  • the terminal device determines the number of spatial basis vectors corresponding to each of the multiple TRPs, it reports it to the network device, so that the network device can obtain the number of spatial basis vectors corresponding to each of the multiple TRPs, thereby enabling the network device to determine the precoding matrix of each of the multiple TRPs, making it easier for the network device to obtain accurate channel status, thereby improving communication quality.
  • the embodiment of the present application proposes another method for reporting channel state parameters.
  • the network device configures the number of spatial basis vectors corresponding to each TRP, and the terminal device autonomously determines the TRP.
  • the method may include the following steps:
  • Step 601 The network device sends indication information #A to the terminal device, and correspondingly, the terminal device receives the indication information #A.
  • the indication information #A is used to indicate the number of spatial basis vectors corresponding to the Q TRPs.
  • the indication information #A may be configuration information.
  • the configuration information is used to indicate a third corresponding relationship.
  • the third corresponding relationship is a corresponding relationship between an index and the number of spatial basis vectors corresponding to each TRP.
  • the third corresponding relationship belongs to a fourth corresponding relationship.
  • the fourth corresponding relationship may be determined by the network device, or predefined by the protocol, or preconfigured, which is not limited in the present application.
  • the fourth correspondence relationship can be presented in the form of a table, as shown in Table 6 to Table 9:
  • the indication information #A can be used to indicate a row in the above table to the terminal device (an example of the third corresponding relationship).
  • the network device sequentially configures the values of the number of spatial basis vectors corresponding to Q TRPs.
  • the network device sends an indication message to the terminal device, where the indication message is used to indicate the index of the number of spatial basis vectors corresponding to each TRP in the candidate set of values of the number of spatial basis vectors.
  • the indication message is used to indicate the index of the number of spatial basis vectors corresponding to each TRP in the candidate set of values of the number of spatial basis vectors.
  • Step 602 The terminal device determines N TRPs.
  • the N TRPs are determined from the Q TRPs. Specifically, reference may be made to the relevant description in step 601, which will not be repeated here.
  • Step 603 The terminal device sends indication information #B to the network device, and correspondingly, the network device receives the indication information #B.
  • the terminal device can determine the N TRPs and indicate to the network device which TRPs they are.
  • the indication information #B is used to indicate the N TRPs in step 502.
  • the indication information #B is a bitmap.
  • the bitmap is used to indicate N TRPs.
  • the number of bits of the bitmap is related to Q. Specifically, reference may be made to the description of the bitmap in step 402, which will not be repeated here.
  • the network device determines N TRPs based on indication information #B, and can further determine the number of spatial basis vectors corresponding to the N TRPs.
  • the indication information #B is 0101
  • the network device can determine that there are two TRPs according to the indication information #B, namely TRP#2 and TRP#4. Because the number of spatial basis vectors corresponding to the four (Q is 4 at this time) TRPs is configured by the network device (such as implementation A or implementation B in step 601), the network device can directly determine the number of spatial basis vectors corresponding to TRP#2 and TRP#4. That is, the network device determines that the number of spatial basis vectors corresponding to TRP#2 is L2 with a value of 2, and the number of spatial basis vectors corresponding to TRP#4 is L4 with a value of 1.
  • Step 604 The network device determines the precoding matrix according to the number of spatial basis vectors corresponding to the N TRPs.
  • the manner in which the network device determines the precoding matrix may refer to the foregoing description, which will not be repeated here.
  • the spatial basis vector is used as an example in the above solution description, but the present application is not limited thereto.
  • the spatial basis vector in the above text is replaced with the number of ports, the above method is still applicable, but the relevant numerical values are changed.
  • the terminal device determines the number of spatial basis vectors corresponding to each of the multiple TRPs, it reports it to the network device, so that the network device can obtain the number of spatial basis vectors corresponding to each of the multiple TRPs, thereby enabling the network device to determine the precoding matrix of each of the multiple TRPs.
  • the terminal device only needs to report the selection of N TRPs, which further saves overhead.
  • the network device or terminal device may include a hardware structure and/or a software module, and implement the above functions in the form of a hardware structure, a software module, or a hardware structure plus a software module. Whether one of the above functions is executed in the form of a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraints of the technical solution.
  • each functional module in each embodiment of the present application may be integrated into a processor, or may exist physically separately, or two or more modules may be integrated into one module.
  • the above-mentioned integrated modules may be implemented in the form of hardware or in the form of software functional modules.
  • an embodiment of the present application provides a communication device 700 for implementing the functions of the terminal device or network device in the above method.
  • the device may be a software module or a chip system.
  • the chip system may be composed of a chip, or may include a chip and other discrete devices.
  • the device 700 may include: a processing unit 710 and a communication unit 720.
  • the communication unit may also be referred to as a transceiver unit or a transceiver module, and may include a sending unit and/or a receiving unit, which are respectively used to execute the steps of sending and receiving of the perception node in the above method embodiment.
  • the communication unit may also be referred to as a transceiver, a transceiver, a transceiver device, etc.
  • the processing unit may also be referred to as a processor, a processing board, a processing module, a processing device, etc.
  • the device used to implement the receiving function in the communication unit 720 may be regarded as a receiving unit, and the device used to implement the sending function in the communication unit 720 may be regarded as a sending unit, that is, the communication unit 720 includes a receiving unit and a sending unit.
  • the communication unit may also be sometimes referred to as a transceiver, a transceiver, or an interface circuit, etc.
  • the receiving unit may also be sometimes referred to as a receiver, a receiver, or a receiving circuit, etc.
  • the sending unit may also be sometimes referred to as a transmitter, a transmitter, or a transmitting circuit, etc.
  • the processing unit is used to obtain the number of spatial basis vectors corresponding to N channel state information reference signal resources TRP respectively.
  • the processing unit is used to obtain the number of spatial basis vectors corresponding to N TRPs respectively according to a first parameter and a candidate set of values of the number of spatial basis vectors.
  • the first parameter is used to indicate the maximum value of the sum of the number of spatial basis vectors corresponding to the N TRPs respectively, and the first parameter is less than or equal to the sum of the number of spatial basis vectors supported by the Q TRPs.
  • the processing unit is used to obtain the number of spatial basis vectors corresponding to the N TRPs respectively according to the first parameter and the first corresponding relationship.
  • the first corresponding relationship is the corresponding relationship between the first index and the number of spatial basis vectors corresponding to the N TRPs respectively.
  • the processing unit is used to obtain the number of spatial basis vectors corresponding to the N TRPs respectively according to the third corresponding relationship.
  • the third corresponding relationship is the corresponding relationship between the index and the number of spatial basis vectors corresponding to each TRP respectively.
  • the third corresponding relationship can be determined by the network device.
  • the processing unit may execute the steps shown in FIG. 5 to obtain the number of spatial basis vectors corresponding to N TRPs, which will not be described in detail here.
  • the communication unit is used to receive indication information, where the indication information is used to indicate the number of spatial basis vectors corresponding to N TRPs respectively.
  • the indication information may include first indication information and second indication information, wherein the first indication information is used to indicate the sum of the number of spatial basis vectors corresponding to N TRPs respectively, and the second indication information is used to indicate the number of spatial basis vectors corresponding to N TRPs respectively.
  • the second indication information can be used to indicate the spatial basis vectors corresponding to the N TRPs respectively.
  • the indication information may be used to indicate an index of the first corresponding relationship.
  • the indication information includes a bitmap, and the bitmap is used to indicate N TRPs.
  • the communication unit may execute the method of sending the indication information in the steps shown in FIG. 5 , which will not be described in detail here.
  • the communication unit is used to receive indication information, and the indication information is used to indicate the number of spatial basis vectors corresponding to N TRPs respectively.
  • the processing unit is used to determine the number of spatial basis vectors corresponding to the N TRPs respectively according to the indication information.
  • processing unit 710 and the communication unit 720 may also perform other functions.
  • processing unit 710 and the communication unit 720 may also perform other functions.
  • FIG8 a communication device 800 provided in an embodiment of the present application is shown.
  • the device shown in FIG8 may be a hardware circuit implementation of the device shown in FIG7 .
  • the communication device may be applicable to the flowchart shown above to perform the functions of the terminal device or network device in the above method embodiment.
  • FIG8 only shows the main components of the communication device.
  • the communication device 800 may be a terminal device that can implement the functions of the terminal device in the method provided in the embodiment of the present application.
  • the communication device 800 may also be a device that can support the terminal device to implement the corresponding functions in the method provided in the embodiment of the present application.
  • the communication device 800 may be a network device that can implement the functions of the network device in the method provided in the embodiment of the present application.
  • the communication device 800 may also be a device that can support the network device to implement the corresponding functions in the method provided in the embodiment of the present application.
  • the communication device 800 may be a chip system. In the embodiment of the present application, the chip system may be composed of a chip, or may include a chip and other discrete devices. For specific functions, please refer to the description in the above method embodiment.
  • the communication device 800 includes one or more processors 810, which are used to implement or support the communication device 800 to implement the functions of the terminal device or network device in the method provided in the embodiment of the present application. Please refer to the detailed description in the method example for details, which will not be repeated here.
  • the processor 810 may also be referred to as a processing unit or a processing module, which may implement certain control functions.
  • the processor 810 may be a general-purpose processor or a dedicated processor, etc. For example, it may include: a central processing unit, a baseband processor, an application processor, a modem processor, a graphics processor, an image signal processor, a digital signal processor, a video codec processor, a controller, and/or a neural network processor, etc.
  • the central processing unit may be used to control the communication device 800, execute software programs and/or process data.
  • Different processors may be independent devices, or they may be integrated in one or more processors, for example, integrated in one or more application-specific integrated circuits.
  • the processor in the embodiments of the present application may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof.
  • the general-purpose processor may be a microprocessor or any conventional processor.
  • the communication device 800 includes one or more memories 820 for storing instructions 840, and the instructions can be executed on the processor 810, so that the communication device 800 performs the method described in the above method embodiment.
  • the memory 820 is coupled to the processor 810.
  • the coupling in the embodiment of the present application is an indirect coupling or communication connection between devices, units or modules, which can be electrical, mechanical or other forms, for information exchange between devices, units or modules.
  • the processor 810 may operate in conjunction with the memory 820. At least one of the at least one memory may be included in the processor. It should be noted that the memory 820 is not required, so it is illustrated by dotted lines in Figure 8.
  • data may also be stored in the memory 820.
  • the processor and the memory may be provided separately or integrated together.
  • the memory 820 may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), or a volatile memory (volatile memory), such as a random-access memory (RAM).
  • HDD hard disk drive
  • SSD solid-state drive
  • RAM random-access memory
  • the processor may also be a flash memory, a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a register, a hard disk, a mobile hard disk, a CD-ROM, or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium.
  • the storage medium may also be a component of the processor.
  • the processor and the storage medium may be located in an ASIC.
  • the ASIC may be located in a network device or a terminal device.
  • the processor and the storage medium may also exist in a network device or a terminal device as discrete components.
  • the memory is any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.
  • the memory in the embodiments of the present application can also be a circuit or any other device that can realize the storage function, for storing program instructions and/or data.
  • the communication device 800 may include instructions 830 (sometimes also referred to as codes or programs), and the instructions 830 may be executed on the processor so that the communication device 800 performs the method described in the above embodiment.
  • the processor 810 may store data.
  • the communication device 800 may further include a transceiver 850 and an antenna 860.
  • the transceiver 850 may be referred to as a transceiver unit, a transceiver module, a transceiver, a transceiver circuit, a transceiver, an input/output interface, etc., and is used to implement the transceiver function of the communication device 800 through the antenna 860.
  • the processor 810 and the transceiver 850 described in the present application may be implemented in an integrated circuit (IC), an analog IC, a radio frequency integrated circuit (RFID), a mixed signal IC, an ASIC, a printed circuit board (PCB), or an electronic device.
  • the communication device described herein may be an independent device (e.g., an independent integrated circuit, a mobile phone, etc.), or may be a part of a larger device (e.g., a module that can be embedded in other devices).
  • a module that can be embedded in other devices.
  • the communication device 800 may further include one or more of the following components: a wireless communication module, an audio module, an external memory interface, an internal memory, a universal serial bus (USB) interface, a power management module, an antenna, a speaker, a microphone, a Wind, input and output modules, sensor modules, motors, cameras, or display screens, etc. It is understood that in some embodiments, the communication device 800 may include more or fewer components, or some components may be integrated, or some components may be separated. These components may be implemented in hardware, software, or a combination of software and hardware.
  • the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, optical storage, etc.) that contain computer-usable program code.
  • a computer-usable storage media including but not limited to disk storage, optical storage, etc.
  • These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device that implements the functions specified in one or more processes in the flowchart and/or one or more boxes in the block diagram.

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Abstract

本申请提供了一种信道状态参数的上报方法、装置及系统。该方法包括：终端设备获取N个信道状态信息参考信号CSI-RS资源分别对应的空域基向量数量，该N个CSI-RS资源是从Q个CSI-RS资源中确定的，N为小于或等于Q的正整数，Q为大于或等于1的正整数；发送指示信息，该指示信息用于指示该N个CSI-RS资源分别对应的空域基向量数量。在该方法中，终端设备确定多个TRP各自对应的空域基向量的数量后，上报给网络设备，使得网络设备能够获取多个TRP各自对应的空域基向量的数量，从而使能网络设备确定多个TRP各自的预编码矩阵，能够提升通信质量。

Description

一种信道状态参数的上报方法、装置及系统
本申请要求于2022年11月4日提交中国专利局、申请号为202211378581.3、申请名称为“一种信道状态参数的上报方法、装置及系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域。尤其涉及一种信道状态参数的上报方法、装置及系统。
背景技术
在频分双工大量多输入多输出(Frequency Division Duplex Massive Multiple Input Multiple Output，FDD massive MIMO)系统中，FDD系统由于上下行信道存在较大的频点间隔，并且上行信道与下行信道之间不完全互易，使得FDD系统无法通过上行信道状态估计来获取完整的下行信道状态。因此，下行信道状态信息(Channel State Information，CSI)的获取成为了FDD系统确定下行信道状态的关键。当前技术中，信道状态信息，如预编码矩阵指示(Precoding Matrix Indicator，PMI)，的上报通常是针对终端设备和单个传输接收点(Transmitting and Receiving Point，TRP)的。随着通信技术的发展，通信系统，比如第五代通信(5th Generation，5G)系统对系统容量、频谱效率等方面有了更高的要求，多TRP协作传输的通信场景越来越广泛。在多TRP协作传输中，多个TRP之间相互协作以共同为终端设备提供服务。此时，终端设备需要上报与协作TRP中各个TRP之间的信道状态信息，如何有效上报多TRP的信道状态参数成为了亟待解决的问题。
发明内容
本申请提供一种信道状态参数的上报方法、装置及系统，能够准确获取多TRP的信道状态信息，提升了通信质量。
第一方面，提供了一种信道状态参数的上报方法，该方法可以包括：获取N个信道状态信息参考信号资源(Channel State Information Reference Signal resource，CSI-RS resource)分别对应的空域基向量数量，所述N个CSI-RS资源是从Q个CSI-RS资源中确定的，所述N为小于或等于Q的正整数，所述Q为大于或等于1的正整数；发送指示信息，所述指示信息用于指示所述N个CSI-RS资源分别对应的空域基向量数量。
可选地，所述N个CSI-RS资源分别对应的空域基向量数量是根据所述Q个CSI-RS资源支持的空域基向量数量总和确定的，所述N个CSI-RS资源分别对应的空域基向量数量的总和小于或等于所述Q个CSI-RS资源支持的空域基向量数量总和。
应理解，本申请中的空域基向量数量作为信道状态信息的一个示例，能够用于网络设备确定多TRP的信道状态信息。但本申请不限于此，其他能够反映信道状态信息的参数也可以适用本申请的方案，比如端口数量。
还应理解，N个CSI-RS资源与N个TRP一一对应，本申请中的CSI-RS资源替换为TRP同样适用。
该方法中，终端设备确定多个TRP各自对应的空域基向量的数量后，上报给网络设备，使得网络设备能够获取多个TRP各自对应的空域基向量的数量，从而使能网络设备确定多个TRP各自的预编码矩阵。
结合第一方面，在第一方面的某些实现方式中，该方法还可以包括：获取第一参数，所述第一参数用于指示所述N个CSI-RS资源分别对应的空域基向量数量之和的最大值，所述第一参数小于或等于所述Q个CSI-RS资源支持的空域基向量数量总和，根据所述第一参数确定所述N个CSI-RS资源分别对应的空域基向量数量。
第一参数可以理解为N个CSI-RS资源分别对应的空域基向量数量之和的一个上限值。换句话说，TRP对应的空域基向量数量在该TPR支持空域基向量数量的能力范围内。
结合第一方面，在第一方面的某些实现方式中，所述获取所述N个CSI-RS资源分别对应的空域基向量数量包括：根据所述第一参数和空域基向量数量取值候选集合，获取所述N个CSI-RS资源分别对应的 空域基向量数量，所述空域基向量数量取值候选集合包括至少一个取值，所述N个CSI-RS资源分别对应的空域基向量数量中的任一空域基向量数量属于所述空域基向量数量取值候选集合。
进一步地，空域基向量数量的取值可以是从空域基向量数量取值候选集合确定的，该空域基向量数量取值候选集合可以是协议预定义的，可以是预配置的，也可以是指示的，比如，网络设备向终端设备指示该空域基向量数量取值候选集合，本申请对此不作限定。
结合第一方面，在第一方面的某些实现方式中，所述指示信息用于指示所述N个CSI-RS资源分别对应的空域基向量数量包括：所述指示信息包括第一指示信息和第二指示信息，其中，所述第一指示信息用于指示所述N个CSI-RS资源分别对应的空域基向量数量的总和，所述第二指示信息用于指示所述N个CSI-RS资源分别对应的空域基向量数量。
结合第一方面，在第一方面的某些实现方式中，所述第二指示信息用于指示所述N个CSI-RS资源分别对应的空域基向量。
该方式中，第二指示信息指示空域基向量，网络设备根据该空域基向量可以确定N个CSI-RS资源分别对应的空域基向量数量。换句话说，该方式可以理解为隐式指示空域基向量数量。
结合第一方面，在第一方面的某些实现方式中，所述第二指示信息包括S个比特，所述S是根据所述N、P和Ltot确定的，其中，所述P为所述N个CSI-RS资源中的任一CSI-RS资源对应的TRP的CSI-RS端口数量，所述Ltot为所述N个CSI-RS资源分别对应的空域基向量数量的总和。
该方式中，N个CSI-RS资源各自对应的空域基向量可能有多种选择，第二指示信息通过多个比特指示这多种选择中的一种，以向网络设备指示N个CSI-RS资源各自对应的空域基向量，进一步使得网络设备能够确定N个CSI-RS资源各自对应的空域基向量数量，节省了指示开销。
结合第一方面，在第一方面的某些实现方式中，所述第一指示信息承载于CSI part1中，所述第二指示信息承载于CSI part2中。
结合第一方面，在第一方面的某些实现方式中，所述指示信息包括个比特,所述指示信息的前个比特或后个比特用于指示所述N个CSI-RS资源分别对应的空域基向量数量，所述指示信息的前个比特或后个比特中每个比特对应一个空域基向量数量在所述空域基向量数量取值候选集合中的索引，所述Y为所述空域基向量数量取值候选集合中所包含的元素个数。
该方式中，在指示信息中划定了比特位用于指示N个CSI-RS资源分别对应的空域基向量数量，其余未用于指示的比特位，网络设备无需解析，降低了解析复杂度。
结合第一方面，在第一方面的某些实现方式中，所述指示信息包括个比特，所述个比特分为Q组，所述Q组中的任一组包括个比特，所述Q组分别与所述Q个CSI-RS资源对应，与所述N个CSI-RS资源对应的N组比特分别用于指示所述N个CSI-RS资源分别对应的空域基向量数量在所述空域基向量数量取值候选集合中的索引，所述Y为所述空域基向量数量取值候选集合中所包含的元素个数。
该方式中，指示信息的比特位与Q个CSI-RS资源对应，在N个CSI-RS资源对应的比特位上可以赋值，用于指示该N个CSI-RS资源分别对应的空域基向量数量。其余未与N个CSI-RS资源对应的比特位，网络设备无需解析，进一步提升了指示信息设计的灵活性。
结合第一方面，在第一方面的某些实现方式中，所述获取所述N个CSI-RS资源分别对应的空域基向量数量包括：根据所述第一参数和第一对应关系，获取所述N个CSI-RS资源分别对应的空域基向量数量，所述第一对应关系为第一索引与所述N个CSI-RS资源分别对应的空域基向量数量的对应关系。
结合第一方面，在第一方面的某些实现方式中，所述第一对应关系属于第二对应关系，所述第二对应关系包括至少两个对应关系，所述至少两个对应关系包括至少两个索引，所述至少两个索引包括所述第二索引和第三索引，所述第二索引的取值小于所述第三索引的取值，所述第二索引对应的N个CSI-RS资源分别对应的空域基向量数量之和，小于，所述第三索引对应的N个CSI-RS资源分别对应的空域基向量数量之和。
结合第一方面，在第一方面的某些实现方式中，所述指示信息用于指示N个CSI-RS资源分别对应的空域基向量数量包括：所述指示信息用于指示第一索引。
其中，第一对应关系和/或第二对应关系可以是协议预定义的，可以是预配置的，也可以是指示的，比如网络设备向终端设备指示第一对应关系和/或第二对应关系。本申请对此不作限定。
该方式中，指示信息指示索引即可，网络设备可以根据该索引和对应关系确定N个CSI-RS资源分别对应的空域基向量数量，进一步节省了指示开销。
结合第一方面，在第一方面的某些实现方式中，所述方法还包括：接收配置信息，所述配置信息用于指示以下中的至少一项：所述第一参数、所述N个CSI-RS资源支持的空域基向量数量的平均值、所述Q个CSI-RS资源支持的空域基向量数量的平均值，所述获取第一参数包括：根据所述配置信息确定所述第一参数。
换句话说，配置信息可以直接指示第一参数的取值，也可以指示其他参数用于确定第一参数的取值。
结合第一方面，在第一方面的某些实现方式中，所述指示信息还用于指示所述N个CSI-RS资源。
该方式中，指示信息指示N个CSI-RS资源，可以用于在上述各实现方式中，网络设备联合N个CSI-RS资源的指示信息与空域基向量数量的指示信息，从而精准确定每一个CSI-RS资源分别对应的空域基向量数量，提高了网络设备确定各TRP信道状态的准确度。
第二方面，提供了一种信道状态参数的上报方法，该方法可以包括：接收指示信息，所述指示信息用于指示N个信道状态信息参考信号资源CSI-RS资源分别对应的空域基向量数量，所述N个CSI-RS资源是从Q个CSI-RS资源中确定的，所述N为小于或等于Q的正整数，所述Q为大于等于1的正整数；根据所述N个CSI-RS资源分别对应的空域基向量数量确定预编码矩阵。
可选地，所述N个CSI-RS资源分别对应的空域基向量数量是根据所述Q个CSI-RS资源支持的空域基向量数量总和确定的，所述N个CSI-RS资源分别对应的空域基向量数量的总和小于或等于所述Q个CSI-RS资源支持的空域基向量数量总和。
结合第二方面，在第二方面的某些实现方式中，所述N个CSI-RS资源分别对应的空域基向量数量是根据第一参数确定的，所述第一参数用于指示所述N个CSI-RS资源分别对应的空域基向量数量之和的最大值，所述第一参数小于或等于所述Q个CSI-RS资源支持的空域基向量数量总和。
结合第二方面，在第二方面的某些实现方式中，所述N个CSI-RS资源分别对应的空域基向量数量是根据所述第一参数确定的包括：所述N个CSI-RS资源分别对应的空域基向量数量是根据所述第一参数和空域基向量数量取值候选集合确定的，所述第一空域基向量数量取值候选集合包括至少一个取值，所述N个CSI-RS资源分别对应的空域基向量数量中的任一空域基向量数量属于所述空域基向量数量取值候选集合。
结合第二方面，在第二方面的某些实现方式中，所述指示信息用于指示所述N个CSI-RS资源分别对应的空域基向量数量包括：所述指示信息包括第一指示信息和第二指示信息，其中，所述第一指示信息用于指示所述N个CSI-RS资源分别对应的空域基向量数量的总和，所述第二指示信息用于指示所述N个CSI-RS资源分别对应的空域基向量数量。
结合第二方面，在第二方面的某些实现方式中，所述第二指示信息用于指示所述N个CSI-RS资源分别对应的空域基向量。
结合第二方面，在第二方面的某些实现方式中，所述第二指示信息包括S个比特，所述S是根据所述N、P和Ltot确定的，其中，所述P为所述N个CSI-RS资源中的任一CSI-RS资源对应的TRP的CSI-RS端口数量，所述Ltot为所述N个CSI-RS资源分别对应的空域基向量数量的总和。
结合第二方面，在第二方面的某些实现方式中，所述第一指示信息承载于CSI part1中，所述第二指示信息承载于CSI part2中。
结合第二方面，在第二方面的某些实现方式中，所述指示信息包括个比特,所述指示信息的前个比特或后个比特用于指示所述N个CSI-RS资源分别对应的空域基向量数量，所述指示信息的前个比特或后个比特中每个比特对应一个空域基向量数量在所述空域基向量数量取值候选集合中的索引，所述Y为所述空域基向量数量取值候选集合中所包含的元素个数。
结合第二方面，在第二方面的某些实现方式中，所述指示信息包括个比特，所述个比特分为Q组，所述Q组中的任一组包括个比特，所述Q组分别与所述Q个CSI-RS资源对应，与所述N个CSI-RS资源对应的N组比特分别用于指示所述N个CSI-RS资源分别对应的空域基向量数量在所述空域基向量数量取值候选集合中的索引。
结合第二方面，在第二方面的某些实现方式中，所述N个CSI-RS资源分别对应的空域基向量数量是根据第一参数确定的包括：所述N个CSI-RS资源分别对应的空域基向量数量是根据所述第一参数和第一 对应关系确定的，所述第一对应关系为第一索引与所述N个CSI-RS资源分别对应的空域基向量数量的对应关系。
结合第二方面，在第二方面的某些实现方式中，所述第一对应关系属于第二对应关系，所述第二对应关系包括至少两个对应关系，所述至少两个对应关系包括至少两个索引，所述至少两个索引包括所述第二索引和第三索引，所述第二索引的取值小于所述第三索引的取值，所述第二索引对应的N个CSI-RS资源分别对应的空域基向量数量之和，小于，所述第三索引对应的N个CSI-RS资源分别对应的空域基向量数量之和。
结合第二方面，在第二方面的某些实现方式中，所述指示信息用于指示N个CSI-RS资源分别对应的空域基向量数量包括：
所述指示信息用于指示所述第一索引。
结合第二方面，在第二方面的某些实现方式中，所述方法还包括：发送配置信息，所述配置信息用于确定所述第一参数，所述配置信息用于指示以下中的至少一项：所述第一参数；所述N个CSI-RS资源支持的空域基向量数量的平均值；所述Q个CSI-RS资源支持的空域基向量数量的平均值。
结合第二方面，在第二方面的某些实现方式中，所述指示信息还用于指示所述N个CSI-RS资源。
应理解，第二方面是第一方面对侧的实现方式，关于第一方面的补充、解释和有益效果的说明同样适用于第二方面，这里不再赘述。
第三方面，提供了一种通信装置，该通信装置包括处理模块和收发模块，其中，所述处理模块用于获取N个信道状态信息参考信号资源CSI-RS资源分别对应的空域基向量数量，所述N个CSI-RS资源是从Q个CSI-RS资源中确定的，所述N为小于或等于Q的正整数，所述Q为大于等于1的正整数；所述收发模块用于发送指示信息，所述指示信息用于指示所述N个CSI-RS资源分别对应的空域基向量数量。
可选地，所述N个CSI-RS资源分别对应的空域基向量数量是根据所述Q个CSI-RS资源支持的空域基向量数量总和确定的，所述N个CSI-RS资源分别对应的空域基向量数量的总和小于或等于所述Q个CSI-RS资源支持的空域基向量数量总和。
结合第三方面，在第三方面的某些实现方式中，所述处理模块还用于获取第一参数，所述第一参数用于指示所述N个CSI-RS资源分别对应的空域基向量数量之和的最大值，所述第一参数小于或等于所述Q个CSI-RS资源支持的空域基向量数量总和，所述处理模块还用于根据所述第一参数确定所述N个CSI-RS资源分别对应的空域基向量数量。
结合第三方面，在第三方面的某些实现方式中，所述处理单元用于获取所述N个CSI-RS资源分别对应的空域基向量数量包括：所述处理模块用于根据所述第一参数和空域基向量数量取值候选集合，获取所述N个CSI-RS资源分别对应的空域基向量数量，所述空域基向量数量取值候选集合包括至少一个取值，所述N个CSI-RS资源分别对应的空域基向量数量中的任一空域基向量数量属于所述空域基向量数量取值候选集合。
结合第三方面，在第三方面的某些实现方式中，所述指示信息用于指示所述N个CSI-RS资源分别对应的空域基向量数量包括：所述指示信息包括第一指示信息和第二指示信息，其中，所述第一指示信息用于指示所述N个CSI-RS资源分别对应的空域基向量数量的总和，所述第二指示信息用于指示所述N个CSI-RS资源分别对应的空域基向量数量。
结合第三方面，在第三方面的某些实现方式中，所述第二指示信息用于指示所述N个CSI-RS资源分别对应的空域基向量。
结合第三方面，在第三方面的某些实现方式中，所述第二指示信息包括S个比特，所述S是根据所述N、P和Ltot确定的，其中，所述P为所述N个CSI-RS资源中的任一CSI-RS资源对应的TRP的CSI-RS端口数量，所述Ltot为所述N个CSI-RS资源分别对应的空域基向量数量的总和。
结合第三方面，在第三方面的某些实现方式中，所述第一指示信息承载于CSI part1中，所述第二指示信息承载于CSI part2中。
结合第三方面，在第三方面的某些实现方式中，所述指示信息包括个比特,所述指示信息的前个比特或后个比特用于指示所述N个CSI-RS资源分别对应的空域基向量数量，所述指示信息的前个比特或后个比特中每个比特对应一个空域基向量数量在所述空域基向量数量取值候选集合中的索引，所述Y为所述空域基向量数量取值候选集合中所包含的元素个数。
结合第三方面，在第三方面的某些实现方式中，所述指示信息包括个比特，所述个比特分为Q组，所述Q组中的任一组包括个比特，所述Q组分别与所述Q个CSI-RS资源对应，与所述N个CSI-RS资源对应的N组比特分别用于指示所述N个CSI-RS资源分别对应的空域基向量数量在所述空域基向量数量取值候选集合中的索引，所述Y为所述空域基向量数量取值候选集合中所包含的元素个数。
结合第三方面，在第三方面的某些实现方式中，所述处理单元用于获取所述N个CSI-RS资源分别对应的空域基向量数量包括：所述处理单元用于根据所述第一参数和第一对应关系，获取所述N个CSI-RS资源分别对应的空域基向量数量，所述第一对应关系为第一索引与所述N个CSI-RS资源分别对应的空域基向量数量的对应关系。
结合第三方面，在第三方面的某些实现方式中，所述第一对应关系属于第二对应关系，所述第二对应关系包括至少两个对应关系，所述至少两个对应关系包括至少两个索引，所述至少两个索引包括所述第二索引和第三索引，所述第二索引的取值小于所述第三索引的取值，所述第二索引对应的N个CSI-RS资源分别对应的空域基向量数量之和，小于，所述第三索引对应的N个CSI-RS资源分别对应的空域基向量数量之和。
结合第三方面，在第三方面的某些实现方式中，所述指示信息用于指示N个CSI-RS资源分别对应的空域基向量数量包括：所述指示信息用于指示所述第一索引。
结合第三方面，在第三方面的某些实现方式中，所述收发模块还用于接收配置信息，所述配置信息用于指示以下中的至少一项：
所述第一参数；
所述N个CSI-RS资源支持的空域基向量数量的平均值；
所述Q个CSI-RS资源支持的空域基向量数量的平均值；
所述获取第一参数包括：所述处理模块还用于根据所述配置信息确定所述第一参数。
结合第三方面，在第三方面的某些实现方式中，所述指示信息还用于指示所述N个CSI-RS资源。
应理解，第三方面是第一方面对应的装置侧的实现方式，关于第一方面的补充、解释和有益效果的说明同样适用于第三方面，这里不再赘述。
第四方面，提供一种通信装置，该通信装置包括处理模块和收发模块，其中，所述收发模块用于接收指示信息，所述指示信息用于指示N个信道状态信息参考信号资源CSI-RS资源分别对应的空域基向量数量，所述N个CSI-RS资源是从Q个CSI-RS资源中确定的，所述N为小于或等于Q的正整数，所述Q为大于等于1的正整数；所述处理模块用于根据所述N个CSI-RS资源分别对应的空域基向量数量确定预编码矩阵。
可选地，所述N个CSI-RS资源分别对应的空域基向量数量是根据所述Q个CSI-RS资源支持的空域基向量数量总和确定的，所述N个CSI-RS资源分别对应的空域基向量数量的总和小于或等于所述Q个CSI-RS资源支持的空域基向量数量总和
结合第四方面，在第四方面的某些实现方式中，所述N个CSI-RS资源分别对应的空域基向量数量是根据第一参数确定的，所述第一参数用于指示所述N个CSI-RS资源分别对应的空域基向量数量之和的最大值，所述第一参数小于或等于所述Q个CSI-RS资源支持的空域基向量数量总和。
结合第四方面，在第四方面的某些实现方式中，所述N个CSI-RS资源分别对应的空域基向量数量是根据所述第一参数确定的包括：所述N个CSI-RS资源分别对应的空域基向量数量是根据所述第一参数和空域基向量数量取值候选集合确定的，所述第一空域基向量数量取值候选集合包括至少一个取值，所述N个CSI-RS资源分别对应的空域基向量数量中的任一空域基向量数量属于所述空域基向量数量取值候选集合。
结合第四方面，在第四方面的某些实现方式中，所述指示信息用于指示所述N个CSI-RS资源分别对应的空域基向量数量包括：所述指示信息包括第一指示信息和第二指示信息，其中，所述第一指示信息用于指示所述N个CSI-RS资源分别对应的空域基向量数量的总和，所述第二指示信息用于指示所述N个CSI-RS资源分别对应的空域基向量数量。
结合第四方面，在第四方面的某些实现方式中，所述第二指示信息用于指示所述N个CSI-RS资源分别对应的空域基向量。
结合第四方面，在第四方面的某些实现方式中，所述第二指示信息包括S个比特，所述S是根据所 述N、P和Ltot确定的，其中，所述P为所述N个CSI-RS资源中的任一CSI-RS资源对应的TRP的CSI-RS端口数量，所述Ltot为所述N个CSI-RS资源分别对应的空域基向量数量的总和。
结合第四方面，在第四方面的某些实现方式中，所述第一指示信息承载于CSI part1中，所述第二指示信息承载于CSI part2中。
结合第四方面，在第四方面的某些实现方式中，所述指示信息包括个比特，所述指示信息的前个比特或后个比特用于指示所述N个CSI-RS资源分别对应的空域基向量数量，所述指示信息的前个比特或后个比特中每个比特对应一个空域基向量数量在所述空域基向量数量取值候选集合中的索引，所述Y为所述空域基向量数量取值候选集合中所包含的元素个数。
结合第四方面，在第四方面的某些实现方式中，所述指示信息包括个比特，所述个比特分为Q组，所述Q组中的任一组包括个比特，所述Q组分别与所述Q个CSI-RS资源对应，与所述N个CSI-RS资源对应的N组比特分别用于指示所述N个CSI-RS资源分别对应的空域基向量数量在所述空域基向量数量取值候选集合中的索引。
结合第四方面，在第四方面的某些实现方式中，所述N个CSI-RS资源分别对应的空域基向量数量是根据第一参数确定的包括：所述N个CSI-RS资源分别对应的空域基向量数量是根据所述第一参数和第一对应关系确定的，所述第一对应关系为第一索引与所述N个CSI-RS资源分别对应的空域基向量数量的对应关系。
结合第四方面，在第四方面的某些实现方式中，所述第一对应关系属于第二对应关系，所述第二对应关系包括至少两个对应关系，所述至少两个对应关系包括至少两个索引，所述至少两个索引包括所述第二索引和第三索引，所述第二索引的取值小于所述第三索引的取值，所述第二索引对应的N个CSI-RS资源分别对应的空域基向量数量之和，小于，所述第三索引对应的N个CSI-RS资源分别对应的空域基向量数量之和。
结合第四方面，在第四方面的某些实现方式中，所述指示信息用于指示N个CSI-RS资源分别对应的空域基向量数量包括：所述指示信息用于指示所述第一索引。
结合第四方面，在第四方面的某些实现方式中，所述收发模块还用于发送配置信息，所述配置信息用于确定所述第一参数，所述配置信息用于指示以下中的至少一项：
所述第一参数；
所述N个CSI-RS资源支持的空域基向量数量的平均值；
所述Q个CSI-RS资源支持的空域基向量数量的平均值。
结合第四方面，在第四方面的某些实现方式中，所述指示信息还用于指示所述N个CSI-RS资源。
应理解，第四方面是第二方面对应的装置侧的实现方式，关于第二方面的补充、解释和有益效果的说明同样适用于第四方面，这里不再赘述。
第五方面，本申请实施例提供了一种通信装置，包括接口电路和处理器，该接口电路用于实现第三方面中收发模块的功能，该处理器用于实现第三方面中处理模块的功能。
第六方面，本申请实施例提供了一种通信装置，包括接口电路和处理器，该接口电路用于实现第四方面中收发模块的功能，该处理器用于实现第四方面中处理模块的功能。
第七方面，本申请实施例提供了一种计算机可读介质，该计算机可读介质存储用于终端设备执行的程序代码，该程序代码包括用于执行第一方面或第二方面，或，第一方面或第二方面中任一可能的方式，或，第一方面或第二方面中所有可能的方式的方法的指令。
第八方面，本申请实施例提供了一种计算机可读介质，该计算机可读介质存储用于网络设备执行的程序代码，该程序代码包括用于执行第一方面或第二方面，或，第一方面或第二方面中任一可能的方式，或，第一方面或第二方面中所有可能的方式的方法的指令。
第九方面，提供了一种存储有计算机可读指令的计算机程序产品，当该计算机可读指令在计算机上运行时，使得计算机执行第一方面，或，第一方面中任一可能的方式，或，第一方面中所有可能的方式的方法。
第十方面，提供了一种存储有计算机可读令的计算机程序产品，当该计算机可读指令在计算机上运行时，使得计算机执行上述第二方面，或，第二方面中任一可能的方式，或，第二方面中所有可能的方式的方法。
第十一方面，提供了一种通信系统，该通信系统包括具有实现上述第一方面，或，第一方面中任一可能的方式，或，第一方面中所有可能的方式的方法及各种可能设计的功能的装置和第二方面，或，第二方面中任一可能的方式，或，第二方面中所有可能的方式的方法及各种可能设计的功能的装置。
第十二方面，提供了一种处理器，用于与存储器耦合，用于执行上述第一方面，或，第一方面中任一可能的方式，或，第一方面中所有可能的方式的方法。
第十三方面，提供了一种处理器，用于与存储器耦合，用于执行第二方面，或，第二方面中任一可能的方式，或，第二方面中所有可能的方式的方法。
第十四方面，提供一种芯片系统，该芯片系统包括处理器，还可以包括存储器，用于执行该存储器中存储的计算机程序或指令，使得芯片系统实现前述第一方面或第二方面中任一方面、以及任一方面的任意可能的实现方式中的方法。该芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。
第十五方面，提供了一种存储有计算机可读令的计算机程序产品，当该计算机可读指令在计算机上运行时，使得计算机执行上述第一方面，或，第一方面中任一可能的方式，或，第一方面中所有可能的方式的方法。
第十六方面，提供了一种存储有计算机可读令的计算机程序产品，当该计算机可读指令在计算机上运行时，使得计算机执行上述第二方面，或，第二方面中任一可能的方式，或，第二方面中所有可能的方式的方法。
第十七方面，提供一种通信系统，包括至少一个如第三方面该的通信装置和/或至少一个如第四方面的通信装置，该通信系统用于实现上述第一方面或第二方面，或，第一方面或第二方面中任一可能的方式，或，第一方面或第二方面中所有可能的实现方式的方法。
附图说明
图1示出了适用于本申请实施例的一种通信系统的架构示意图。
图2示出了一种通信装置的协议架构的示意图。
图3示出了一种信道测量的流程的示意图。
图4示出了又一种信道测量的流程的示意图。
图5示出了本申请实施例提出的一种信道状态参数的上报方法的示意图。
图6示出了本申请实施例提出的又一种信道状态参数的上报方法的示意图。
图7示出了本申请实施例提出的一种通信装置的示意性框图。
图8示出了本申请实施例提供的又一种通信装置的示意性框图。
具体实施方式
下面将结合附图，对本申请实施例中的技术方案进行描述。
本申请实施例的技术方案可以应用于各种通信系统，例如：第五代(5th generation，5G)或新无线(new radio，NR)系统、长期演进(long term evolution，LTE)系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)系统等。本申请提供的技术方案还可以应用于未来的通信系统，如第六代移动通信系统。本申请提供的技术方案还可以应用于设备到设备(device to device，D2D)通信，车到万物(vehicle-to-everything，V2X)通信，机器到机器(machine to machine，M2M)通信，机器类型通信(machine type communication，MTC)，以及物联网(internet of things，IoT)通信系统或者其他通信系统。
本申请实施例中的终端设备可以是一种向用户提供语音/数据的设备，例如，具有无线连接功能的手持式设备、车载设备等。目前，一些终端的举例为：手机(mobile phone)、平板电脑、笔记本电脑、掌上电脑、移动互联网设备(mobile internet device，MID)、可穿戴设备，虚拟现实(virtual reality，VR)设备、增强现实(augmented reality，AR)设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程手术(remote medical surgery)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端、蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、可穿戴设备， 5G网络中的终端设备或者未来演进的公用陆地移动通信网络(public land mobile network，PLMN)中的终端设备等，本申请实施例对此并不限定。
作为示例而非限定，在本申请实施例中，该终端设备还可以是可穿戴设备。可穿戴设备也可以称为穿戴式智能设备，是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称，如眼镜、手套、手表、服饰及鞋等。可穿戴设备即直接穿在身上，或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备，更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功能全、尺寸大、可不依赖智能手机实现完整或者部分的功能，例如：智能手表或智能眼镜等，以及只专注于某一类应用功能，需要和其它设备如智能手机配合使用，如各类进行体征监测的智能手环、智能首饰等。
此外，在本申请实施例中，终端设备还可以是IoT系统中的终端设备，IoT是未来信息技术发展的重要组成部分，其主要技术特点是将物品通过通信技术与网络连接，从而实现人机互连，物物互连的智能化网络。
本申请实施例中，用于实现终端设备的功能的装置可以是终端设备，也可以是能够支持终端设备实现该功能的装置，例如芯片系统或芯片，该装置可以被安装在终端设备中。本申请实施例中，芯片系统可以由芯片构成，也可以包括芯片和其他分立器件。
本申请实施例中的网络设备可以是用于与终端设备通信的设备，该网络设备可以是LTE系统中的演进型基站(evoled NodeB，eNB或eNodeB)，还可以是云无线接入网络(cloud radio access network，CRAN)场景下的无线控制器，或者该网络设备可以为中继站、接入点、车载设备、可穿戴设备以及5G网络中的网络设备或者未来演进的PLMN网络中的网络设备，5G系统中的基站的一个或一组(包括多个天线面板)天线面板，或者，还可以为构成gNB或传输点的网络节点，如基带单元(baseband unit，BBU)，或，分布式单元(distributed unit，DU)等，本申请实施例并不限定。
在一些部署中，gNB可以包括集中式单元(centralized unit，CU)和DU。gNB还可以包括有源天线单元(active antenna unit，AAU)。CU实现gNB的部分功能，DU实现gNB的部分功能。比如，CU负责处理非实时协议和服务，实现无线资源控制(radio资源control，RRC)，分组数据汇聚层协议(packet data convergence protocol，PDCP)层的功能。DU负责处理物理层协议和实时服务，实现无线链路控制(radio link control，RLC)层、媒体接入控制(media access control，MAC)层和物理(physical，PHY)层的功能。AAU实现部分物理层处理功能、射频处理及有源天线的相关功能。由于RRC层的信息最终会变成PHY层的信息，或者，由PHY层的信息转变而来，因而，在这种架构下，高层信令，如RRC层信令，也可以认为是由DU发送的，或者，由DU+AAU发送的。可以理解的是，网络设备可以为包括CU节点、DU节点、AAU节点中一项或多项的设备。此外，可以将CU划分为接入网(radio access network，RAN)中的网络设备，也可以将CU划分为核心网(core network，CN)中的网络设备，本申请对此不做限定。
在本申请实施例中，终端设备或网络设备包括硬件层、运行在硬件层之上的操作系统层，以及运行在操作系统层上的应用层。该硬件层包括中央处理器(central processing unit，CPU)、内存管理单元(memory management unit，MMU)和内存(也称为主存)等硬件。该操作系统可以是任意一种或多种通过进程(process)实现业务处理的计算机操作系统，例如，Linux操作系统、Unix操作系统、Android操作系统、iOS操作系统或windows操作系统等。该应用层包含浏览器、通讯录、文字处理软件、即时通信软件等应用。并且，本申请实施例并未对本申请实施例提供的方法的执行主体的具体结构特别限定，只要能够通过运行记录有本申请实施例的提供的方法的代码的程序，以根据本申请实施例提供的方法进行通信即可，例如，本申请实施例提供的方法的执行主体可以是终端设备或网络设备，或者，是终端设备或网络设备中能够调用程序并执行程序的功能模块。
图1示出了适用于本申请实施例的一种通信场景的示意图。图1中的通信系统可以包括至少一个终端设备(例如终端设备110、终端设备120、终端设备130、终端设备140、终端设备150和终端设备160)和网络设备170。网络设备170用于为终端设备提供通信服务并接入核心网，终端设备可以通过搜索网络设备170发送的同步信号、广播信号等接入网络，从而建立与网络设备之间的通信。图1中的终端设备110、终端设备120、终端设备130、终端设备140和终端设备160可以与网络设备170进行上下行传输。例如，网络设备170可以向终端设备110、终端设备120、终端设备130、终端设备140和终端设备160发送下行数据，也可以接收终端设备110、终端设备120、终端设备130、终端设备140和终端设备160 发送的上行数据。
此外，终端设备140、终端设备150和终端设备160也可以看作一个通信系统，终端设备160可以向终端设备140和终端设备150发送下行数据，也可以接收终端设备140和终端设备150发送的上行数据。
应理解，该通信系统中包括的网络设备可以是一个或多个。一个网络设备可以向一个或多个终端设备发送数据。多个网络设备也可以同时向一个或多个终端设备发送数据。
图2是图1中各个网元的模块化结构图。如图2所示，在本申请实施例中，网络设备110包括RRC信令交互模块、MAC信令交互模块以及PHY信令及数据交互模块。终端设备120同样包括RRC信令交互模块、MAC信令交互模块以及PHY信令及数据交互模块。网络设备110的RRC信令交互模块与终端设备120的RRC信令交互模块通信连接，以实现RRC信令的发送以及接收。网络设备110的MAC信令交互模块与终端设备120的MAC信令交互模块通信连接，以实现MAC控制单元(MAC control element，MAC-CE)信令的发送以及接收。
网络设备110的PHY信令及数据交互模块与终端设备120的PHY信令及数据交互模块通信连接，以使得网络设备110能够向终端设备120传输物理下行控制信道(physical downlink control channel，PDCCH)和物理下行共享信道(physical downlink shared channel，PDSCH)。并还能够使得网络设备110接收来自于终端设备120发送的物理上行控制信道(physical uplink control channel，PUCCH)和物理上行共享信道(physical uplink shared channel，PUSCH)。
5G通信系统对系统容量、频谱效率等方面有了更高的要求，在该场景下，网络设备往往需要获取上行信道以及下行信道的信道状态信息(channel state information，CSI)以保障系统的性能。对于FDD的massive MIMO系统，下行CSI的准确获取是保证系统高效运行的关键因素之一。区别于TDD系统，FDD系统由于上下行信道存在较大的频点间隔，上行信道与下行信道之间不完全互易，使得FDD系统无法通过上行信道估计来获取完整的下行信道。
图3是传统FDD系统中网络设备获取下行信道CSI的基本流程示意图。在传统的FDD系统中，需要终端设备向网络设备(例如，基站或gNB)反馈下行信道的CSI，基本流程如图3所示。网络设备需要先向终端设备发送信道测量配置信息，用于对信道测量进行配置，例如告知终端设备信道测量的时间以及行为。继而网络设备向终端设备发送CSI-RS(一般也被称作导频)用于信道测量。终端设备根据接收到的CSI-RS对信道进行测量，并计算最终的CSI反馈量，之后向网络设备反馈下行信道的CSI。网络设备根据终端设备反馈的CSI确定下行数据的预编码信息，从而进行下行数据的预编码和发送，即网络设备可以根据反馈的CSI来调度下行数据，例如向终端设备传输PDCCH和PDSCH。
CSI是在无线通信系统中，由接收端(如终端设备)向发送端(如网络设备)上报的用于描述通信链路的信道属性的信息。在5G通信系统中，CSI包括但不限于信道质量指示(channel-quality indicator，CQI)、预编码矩阵指示(precoding-matrix indicator,PMI)、秩指示(rank indicator,RI)、CSI-RS资源指示(CSI-RS资源indicator,CRI)、层指示(layer indicator,LI)等多种参数。应理解，以上列举的CSI的具体内容仅为示例性说明，不应对本申请构成任何限定。CSI可以包括上文所列举的一项或多项，也可以包括除上述列举之外的其他用于表征CSI的信息，本申请对此不作限定。
在FDD系统中，上行信道与下行信道之间存在较大的频点间隔，且上行信道与下行信道之间不完全互易，网络设备不能够通过对上行信道的估计来获取完整下行信道，此时需要终端设备向网络设备上报下行信道的CSI，以使得网络设备可以确定下行信道矩阵或者确定预编码矩阵。终端设备向网络设备上报下行信道的CSI的基本流程可以包括以下几个步骤：
第一步，网络设备向终端设备发送配置信息。
其中，该配置信息用于下行信道的测量配置，如下行信道的测量时间、下行信道的测量行为等。
第二步，网络设备向终端设备发送参考信号(reference signaling，RS)，如CSI-RS。
其中，该RS用于下行信道的测量。
第三步，终端设备根据配置信息和RS对下行信道进行测量，从而获取下行信道的CSI。
第四步，终端设备向网络设备上报下行信道的CSI。
第五步，网络设备根据下行信道的CSI，确定下行信道矩阵或预编码矩阵。
在FDD系统中，虽然上行信道与下行信道之间不完全互易，但上行信道与下行信道之间的部分信息具有互易性，例如角度的互易性和时延的互易性。基于此，终端设备可以根据上行信道与下行信道之间部分信息的互易性来获取下行信道的CSI，并向网络设备上报该下行信道的CSI，使得网络设备可以确定 下行信道矩阵或者确定预编码矩阵。终端设备根据上行信道与下行信道之间部分信息的互易性，向网络设备上报下行信道的CSI的基本流程可以包括以下几个步骤：
第一步，网络设备对上行信道进行信道估计，并根据估计的上行信道信息获取下行信道的部分信息，如下行信道的角度信息和时延信息；
第二步，网络设备向终端设备发送RS，如CSI-RS。
其中，该RS包括下行信道的角度信息和时延信息。
第三步，终端设备根据RS对下行信道进行测量，从而获取下行信道的CSI。
第四步，终端设备向网络设备上报下行信道的CSI。
第五步，网络设备根据下行信道的CSI、下行信道的角度信息和时延信息，确定下行信道矩阵或预编码矩阵。
示例地，网络设备先根据上行信道的角度和时延信息计算CSI-RS预编码权值，发送基于加载了角度时延信息的预编码CSI-RS；终端设备对CSI-RS进行测量，获得PMI信息，并反馈给网络设备；网络设备再基于终端设备反馈的PMI信息结合角度时延信息确定下行信道矩阵或预编码矩阵。
其中，PMI反馈是根据一套码本来确定和上报的。TS 38.214 Release16 Enhanced Type II Codebook(下文简称Rel-16 eType-II码本)和TS 38.214 Release17 Further enhanced Type II port selection codebook(下文简称Rel-17 FeType-II码本)对应的三级码本结构均为
对于Rel-16 eType-II码本，为所有传输层共用的用于空域压缩的2L个空域基向量组成的空域矩阵(极化共用)，P为CSI-RS端口数；是每层对应的用于频域压缩的Mv个频域基向量组成的频域矩阵，N3为子带数或频域单元数；为空域、频域基向量对应的2LMv个线性组合系数，终端设备需选择其中的若干个非零系数上报，需要上报的非零系数通过比特位图(bitmap)来指示。
对于Rel-17 FeType-II码本，可以利用FDD上下行信道的部分互易性，通过端口选择码本。其中，为端口选择矩阵,表示从P个端口中选择K1个端口，且K1＝2L，每个极化方向上均从P/2个端口中选择相同的L个端口，P为CSI-RS端口数；是用于频域压缩的M个频域基向量组成的频域矩阵，N3为子带数或频域单元数；为端口、频域基向量对应的2LM个线性组合系数，终端设备需选择其中的若干个非零系数上报，需要上报的非零系数通过bitmap来指示。终端设备完成信道测量后，在上行控制信息(Uplink Control Information，UCI)中对CSI进行上报。CSI上报分为两部分(part1和part2)，其中part1的开销是固定的，part2的开销可以由part1中的上报量确定。对于Rel-16 eType II码本，UCI part1(也可以称为CSI part 1)包括RI、CQI以及所有传输层的非零系数总数；UCI part2(也可以称为CSI part 2)包括空域基向量指示信息、空域过采样因子、频域基向量指示信息、最强系数指示信息、非零系数位置指示bitmap以及量化后的非零系数。对于Rel-17 FeType-II码本，只需将CSI part2中的空域基向量指示信息和空域过采样因子替换为端口选择指示信息即可。网络设备根据终端设备的CSI上报量确定应用于下行数据的预编码矩阵。
为了进一步提高系统的性能，可以采用多站协作的方式让多个TRP来为一个终端设备服务。多站协作的方式有多种，如相干协作传输(coherent joint transmission，CJT)、非相干协作传输(non-coherent joint transmission，NCJT)等。在CJT协作方式下，多个TRP同时为终端设备服务，传输对终端设备而言是透明的，从终端设备的角度来看，协作集中的多个TRP可以等效看作一个大基站。因此，终端设备需要联合反馈协作集中各TRP的CSI，使能相干协同传输。
TS 38.214Release18(下文简称Rel-18)聚焦基于Rel-16 eType-II/Rel-17 FeType-II的的CJT码本增强，在RAN1#110会议讨论通过支持两种CJT码本形式(N为协作TRP)：
或
其中，N为参与协作传输的TRP的数目，类似于前文描述码本结构，W1,n为第n个TRP的空域矩阵或端口选择矩阵，为第n个TRP的线性组合系数矩阵，Wf,n为第n个TRP的频域矩阵，Wf为N个TRP共用的频域矩阵，(·)H表示共轭转置运算。对于以上两种CJT码本形式，主要的差异为对频域矩阵而言，是每个TRP有各自的频域矩阵还是N个TRP共用同一个频域矩阵。考虑到不同协作TRP间信道质量和空域稀疏性可能存在差异，每个TRP的空域基向量个数或所选择的端口个数Ln可以是相同也可 以是不相同的。
但是，目前对于Rel-16 eType-II码本，空域基向量个数L的取值是网络侧通过信令配置的，L的取值与其他参数取值绑定，协议协议预定义多组候选参数组合，网络侧通过配置参数组合索引确定L的取值。Rel-16 eType-II码本定义的参数组合列表如表1所示：
表1 码本参数配置表
其中，L为所选空域基向量的数量，υ为传输的层数，pυ用于确定所选频域基向量的个数Mυ，β用于确定允许终端上报的非零系数个数的最大值。
上述参数配置下，终端设备向网络侧上报索引值，网络侧即可根据该索引值确定L的值。但是，该上报方式只能用于某一个TRP的空域基向量的数量。对于R18CJT码本，参与协作的TRP和终端设备之间的距离差异可能会导致参与协作的TRP和终端设备之间信道的较大差异，当终端设备选择参与协作的TRP中的每个TRP各自对应的空域基向量个数时，不同TRP各自对应的空域基底个数之间可能存在较大差异。现有技术中的参数配置与上报方式无法使得网络侧获取不同TRP空域基向量的数量，进一步地，网络侧无法确定不同TRP的信道状态，这会影响通信质量。
针对上述问题，本申请实施例提出一种信道状态参数的上报方法，该方法适用于多个TRP协作通信的场景，终端设备确定多个TRP各自对应的空域基向量的数量后，上报给网络设备，使得网络设备能够获取多个TRP各自对应的空域基向量的数量，从而使能网络设备确定多个TRP各自的预编码矩阵。应理解，该通信方法既能适用于Rel-18中基于Rel-16Type-II的CJT码本中多个TRP各自对应的空域基向量数量的指示，也适用于Rel-18中基于Rel-17Type-II的CJT码本中多个TRP各自对应的所选端口数量的指示，又或者说，涉及空域基向量数量、端口数量等能够反映信道状态信息的参数的数值指示的场景，本申请的方案都能够适用，本申请对此不作限定。还应理解，下文以终端设备与网络设备之间的交互为例对本申请的方案进行说明，但本申请对执行主体不作限定，比如，本申请方案也可以适用于终端设备与终端设备的交互，又或者，网络设备与网络设备的交互。如图5所示，该方法包括下述步骤：
步骤501：终端设备获取N个CSI-RS资源分别对应的空域基向量数量。
其中，一个CSI-RS资源与一个TRP对应。N个TRP与N个CSI-RS资源一一对应。需要说明的是，“TRP”或“CSI-RS资源”可以用于描述或指示一个TRP，在本申请实施例中，“TRP”和“CSI-RS资源”可以互相替换使用。该N个CSI-RS资源可以是从Q个CSI-RS资源中确定的。可以理解的是，N为小于或等于Q的正整数，Q为大于或等于1的正整数。也就是说，这Q个CSI-RS资源可以视为CSI-RS资源的候选集合，这N个CSI-RS资源属于这Q个CSI-RS资源。这Q个CSI-RS资源可以是协议预定义的，也可以是网络设备向终端设备指示的，本申请对此不作限定。
具体地，终端设备确定N个CSI-RS资源，比如，终端设备从Q个CSI-RS资源中选择N个CSI-RS资源。举个例子，Q为4，终端设备可以选择全部4个CSI-RS资源，也可以选择这4个CSI-RS资源中的一部分，比如选择其中3个CSI-RS资源。也即，终端设备可以选择全部4个TRP作为协作TRP，也可以选择这4个TRP中的一部分作为协作TRP。本申请对此不作限定。
一个CSI-RS资源与一个空域基向量数量对应。换句话说，终端设备为参与协作传输的每个TRP分别选择了一定数量的空域基向量。也即，参与协作传输的每个TRP分别与一定数量的空域基向量对应。
下文将以TRP作为示例对方案进行说明。
一种可能的方式，N个TRP分别对应的空域基向量数量是根据Q个TRP支持的空域基向量数量总和 确定的，比如，N个TRP分别对应的空域基向量数量的总和小于或等于Q个TRP支持的空域基向量数量总和。其中，Q个TRP支持的空域基向量数量总和可以理解为Q个TRP对应的空域基向量数量之和。举个例子，Q取值为4，Q个TRP分别包括TRP#1、TRP#2、TRP#3、TRP#4。其中，每个TRP最多能够支持6个空域基向量数量，则该4个TRP支持的空域基向量数量总和为24。
另一种可能的方式，N个TRP分别对应的空域基向量数量是根据第一参数确定的。该第一参数用于指示N个TRP分别对应的空域基向量数量之和的最大值，第一参数小于或等于Q个TRP支持的空域基向量数量总和。其中，第一参数可以理解为终端设备选择空域基向量数量的一个上限。第一参数最大可以取到Q个TRP支持的空域基向量数量总和。举个例子，Q为4，N为3，该4个TRP支持的空域基向量数量总和为24，第一参数可以小于或者等于24。比如，第一参数可以取16，则终端设备在选择3个TRP对应的空域基向量数量时，需要注意使得这3个TRP对应的空域基向量数量之和小于或等于16。示例地，三个TRP分别为：TRP#1、TRP#2、TRP#3，TRP#1对应4个空域基向量数量，TRP#2对应6个空域基向量数量，TRP#3对应6个空域基向量数量。或者，TRP#1对应6个空域基向量数量，TRP#2对应2个空域基向量数量，TRP#3对应4个空域基向量数量，等等。总之，这三个TRP对应的空域基向量数量之和小于或者等于16即可。
可选地，第一参数可以是根据配置信息确定的。示例地，网络设备向终端设备发送配置信息，对应地，终端设备接收该配置信息。该配置信息用于指示以下中的至少一项：
第一参数；
N个TRP支持的空域基向量数量的平均值；
Q个TRP支持的空域基向量数量的平均值。
对于配置信息指示第一参数的情况，配置信息指示的第一参数可以是直接指示第一参数的取值，也可以是指示第一参数的取值对应的索引，比如，第一参数可以有多个取值候选，每个取值候选对应一个索引。终端设备可以根据该配置信息确定第一参数。
对于配置信息指示N个TRP支持的空域基向量数量的平均值的情况，应理解，网络设备在未确定N的情况下指示的平均值，终端设备可以根据该平均值和终端设备选择的N的数值确定空域基向量数量的总和。换句话说，这种情况下，空域基向量数量的总和是可变的，比如根据N的取值而变化。终端设备根据平均值与所选TRP的数量N能够确定出第一参数的大小。示例地，N取2，2个TRP支持的空域基向量数量的平均值为4，则终端设备可以确定第一参数为8。
对于配置信息指示Q个TRP支持的空域基向量数量的平均值的情况，可以理解为，网络设备指定了Q个TRP的空域基向量数量的总和，相当于确定了N个TRP的空域基向量数量总和的上限，该上限不随N的取值而变化。终端设备根据平均值与配置的TRP的数量Q能够确定出第一参数的大小。示例地，Q取4，4个TRP支持的空域基向量数量的平均值为2，则终端设备可以确定第一参数为8。
上述平均值确定可以是网络设备确定的，可选地，网络设备可以参考平均值候选集合中的值确定。可选地，网络设备可以参考空域基向量数量候选集合来确定上述平均值。
下面对终端设备获取N个信道状态信息参考信号资源TRP分别对应的空域基向量数量的方式详细说明。
方式一：终端设备根据第一参数和空域基向量数量取值候选集合获取N个TRP分别对应的空域基向量数量。
其中，空域基向量数量取值候选集合可以理解为空域基向量数量可以选择的数值的候选，并不一定以集合的形式呈现。一种可能的实现，空域基向量数量取值候选集合为表示空域基向量数量的取值可以是1，可以是2，可以是4，可以是6。下文中的空域基向量数量取值候选集合均以此为例，但应理解，空域基向量数量取值候选不限于此。比如，可以是又或者，等等。该空域基向量数量取值候选集合可以是协议预定义的，可以是预配置的，也可以是指示的，本申请对此不作限定。
可选地，每个TRP对应的空域基向量数量都可以是从空域基向量数量取值候选集合中确定的。示例地，当N取值为3时，三个TRP分别为：TRP#1、TRP#2、TRP#3。其中，每个TRP对应的空域基向量数量可选值都有1,2,4,6四个。
进一步地，终端设备可以根据第一参数和空域基向量数量取值候选集合确定N个TRP分别对应的空域基向量数量。示例地，第一参数取值为16，空域基向量数量取值候选集合为N取值为3。 三个TRP分别为：TRP#1、TRP#2、TRP#3，其中，每个TRP对应的空域基向量数量可选值都有1,2,4,6四个，但是考虑到三个TRP对应的空域基向量数量之和需要小于或等于第一参数，也就是16，至少这三个TRP对应的空域基向量数量不能都取6。一个例子，TRP#1对应的空域基向量数量可以为6，TRP#2对应的空域基向量数量可以为6，TRP#3对应的空域基向量数量可以为4，三个TRP对应的空域基向量数量之和为16，满足小于或等于16的要求。又或者，TRP#1对应的空域基向量数量可以为2，TRP#2对应的空域基向量数量可以为6，TRP#3对应的空域基向量数量可以为4，三个TRP对应的空域基向量数量之和为12，也能够满足小于或等于16的要求。应理解，这里还有其他多种数值选择方式，不再一一枚举。
换句话说，在方式一中，在满足N个TRP分别对应的空域基向量数量之和小于或等于第一参数的条件的前提下，具体哪个TRP对应多少空域基向量数量，可以是由终端设备根据信道测量结果自主确定的。
方式二：终端设备根据第一参数和第一对应关系获取N个TRP分别对应的空域基向量数量。
其中，第一参数可以参考前述说明，这里不再赘述。第一对应关系为第一索引与N个TRP分别对应的空域基向量数量的对应关系。举个例子，N取值为2，这两个个TRP分别为：TRP#1、TRP#2，其中，TRP#1对应的空域基向量数量为6，TRP#2对应的空域基向量数量为4。这两个TRP分别对应的空域基向量数量可以视作一个取值组合，该取值组合可以对应一个索引，比如索引为0。换句话说，索引为0即能够代表TRP#1对应的空域基向量数量为6，TRP#2对应的空域基向量数量为4。
一种可能的实现，第一对应关系属于第二对应关系，第二对应关系包括至少两个对应关系，该至少两个对应关系包括至少两个索引，至少两个索引包括第二索引和第三索引，第二索引的取值小于第三索引的取值，第二索引对应的N个TRP分别对应的空域基向量数量之和，小于，第三索引对应的N个TRP分别对应的空域基向量数量之和。举个例子，N取值为2，这两个个TRP分别为：TRP#1、TRP#2。有两个可选的取值组合，其中一个取值组合为：TRP#1对应的空域基向量数量为6，TRP#2对应的空域基向量数量为4，对应索引#1为0；另一个取值组合为：TRP#1对应的空域基向量数量为6，TRP#2对应的空域基向量数量为6，对应的索引#2为1。
应理解，上述索引取值、N取值、空域基向量数量仅作为示例而非限定。
还应理解，上述第一对应关系和/或第二对应关系可以是网络设备确定的，可以是终端设备确定的，也可以是协议预定义的，也可以是指示的，比如网络设备向终端设备指示第一对应关系和/或第二对应关系，本申请实施例对此不作限定。
一种可能的实现，上述第二对应关系可以通过表格的形式呈现。示例地，第二对应关系如表2至表5所示：
表2 N＝1时索引与空域基向量数量取值的对应关系
表3 N＝2时索引与空域基向量数量取值的对应关系

表4 N＝3时索引与空域基向量数量取值的对应关系
表5 N＝4时索引与空域基向量数量取值的对应关系
上述表2至表5中，L1、L2、L3、L4分别表示不同的TRP对应的空域基向量数量。为了申请文件的简洁，表中未对所有的取值组合一一枚举，以省略号作为替代。
一种可能的实现，在上述各表格中可以发现，取值较大的索引对应的取值组合之和，大于，取值较小的索引对应的取值组合之和。简单来说，就是大索引对应大空域基向量数量之和，小索引对应小空域 基向量数量之和。以表5为例，索引254对应的取值分别为4、6、6、6，四个数值之和为22；索引255对应的取值分别为6、6、6、6，四个数值之和为24，254小于255，22小于24。需要说明的是，当取值之和相同时，不限定索引之间的大小关系。以表5为例，索引251至索引254对应的取值之和均为22，这几个索引可以互相替换，比如，251可以对应取值组合4,6,6,6，换句话说，取值之和相同的组合的行间顺序可以调换，对此不作限定。从这里可以看出，表格中包含了所有可能的取值组合，终端设备可以在其中自主选择N个TRP分别对应的空域基向量数量。
应理解，上述表2至表5只作为一种示例而非限定，比如，在具体应用中，仅以表格的一部分作为实施。比如，可能为了节省开销只实施表格中的一部分，可能是连续的几行，也可能是不连续的几行，对此不作限定。
还应理解，上述表2至表5可以是网络设备确定的，可以是终端设备确定的，也可以是协议预定义的，也可以是指示的，比如，网络设备确定好后向终端设备指示。本申请实施例对此不作限定。总之，上述对应关系应是网络设备与终端设备共知的，这样在指示索引时双方才能够确定该索引对应的内容。
步骤502：终端设备向网络设备发送指示信息，对应地，网络设备接收该指示信息。
该指示信息用于指示所述N个TRP分别对应的空域基向量数量。
下面对应于步骤501中终端设备获取N个TRP分别对应的空域基向量数量的不同方式，对终端设备的指示方式详细说明。
方式1：对应于步骤502中的方式一，该指示信息可以包括第一指示信息和第二指示信息，其中，第一指示信息用于指示N个TRP分别对应的空域基向量数量的总和，第二指示信息用于指示N个TRP分别对应的空域基向量数量。可选地，第二指示信息可以用于指示N个TRP分别对应的空域基向量，网络设备接收到第二指示信息，即可确定N个TRP分别对应的空域基向量数量。
一种可能的实现，第二指示信息为多个比特组成的组合数。上述N个TRP分别对应的空域基向量数量的总和可以用于确定第二指示信息的开销。举个例子，第二指示信息的比特数B可以根据N个TRP分别对应的空域基向量数量的总和Ltot、N的取值和P的取值确定，其中P为N个TRP中的任一TRP对应的TRP的CSI-RS端口数量。
一种可能的方式，其中表示在NP/2个数中挑出Ltot个数的所有可能的数量。
示例地，N为2，P为8，Ltot为4，空域基向量全集包括有4个可选基向量，则需要在8个基向量中选取4个基向量，一共有70种可能，则B等于7。也就是说，第二指示信息包括7个比特，这7个比特可以将2个TRP分别对应的空域基向量的所有选择方案(即70种可能)指示清楚。第二指示信息可以指示其中一个，换句话说，终端设备向网络设备指示的是一种基向量的选择方案。示例地，8个基向量分别为基向量#1、基向量#2、基向量#3、基向量#4、基向量#1、基向量#2、基向量#3、基向量#4，可以有的基向量组合有70种，这里只给出其中几种。
示例地，所选第一个TRP对应基向量#1、基向量#2，所选第二个TRP对应基向量#1、基向量#2，可以通过0000001指示；所选第一个TRP对应基向量#1，所选第二个TRP对应基向量#4、基向量#1、基向量#3可以通过0000010指示，等等。
第二指示信息为0000010，则网络设备根据该指示信息可以确定：所选第一个TRP对应的基向量为基向量#1，所选第二个TRP对应的基向量为基向量#4、基向量#1、基向量#3。
终端设备还可以通过指示信息向网络设备指示选取的N个TRP。示例地，终端设备可以通过bitmap指示Q个TRP中的N个TRP。比如，Q为4，N为2，则bitmap可以包括4个比特。其中，每个比特的取值用于指示一个TRP的选择与否。举个例子，bitmap为0101，可以用于指示终端设备确定的所选的2个TRP分别为TRP#2和TRP#4。
这样，网络设备可以结合指示基向量的指示信息0000010，以及bitmap确定这两个TRP分别对应的空域基向量，进一步确定这两个TRP分别对应的空域基向量的数量。比如，上述bitmap为0101，指示所选的2个TRP分别为TRP#2和TRP#4，并且TRP#2在前，为所选的第一个TRP，则TRP#2对应基向量#1，TRP#4对应基向量#4、基向量#1、基向量#3。进一步地，网络设备可以确定TRP#2对应的空域基向量的数量为1，TRP#4对应的空域基向量的数量为3。
可选地，上述第一指示信息可以是CSI第一部分(CSI part1)，第二指示信息可以是CSI第二部分(CSI part 2)。
这种方式中，终端设备通过向网络设备指示选择的空域基向量，网络设备便能够确定N个TRP分别对应的空域基向量数量，无需额外上报，节省了指示开销。
方式2：对应于步骤502中的方式一，指示信息#A可以包括个比特。该指示信息的前个比特或后个比特用于指示N个TRP分别对应的空域基向量数量。该指示信息的前个比特或后个比特中每个比特对应一个空域基向量数量在空域基向量数量取值候选集合中的索引，其中，Y为空域基向量数量取值候选集合中所包含的元素个数。
示例地，Q取值为4，N取值为2，空域基向量数量取值候选集合为Y为4，则该指示信息可以包括8个比特。该指示信息的前4个比特或后4个比特用于指示2个TRP分别对应的空域基向量数量。可选地，中，取值为1对应索引0，取值为2对应索引1，取值为4对应索引2，取值为6对应索引3。下面以前4个比特作为示例。该指示信息为0100XXXX。其中01用于指示第一个TRP对应空域基向量数量在空域基向量数量取值候选集合中的索引为1，即第一个TRP对应空域基向量数量为2；01用于指示第二个TRP对应空域基向量数量在空域基向量数量取值候选集合中的索引为0，则第二个TRP对应空域基向量数量为1。目前还无法确定究竟是哪个TRP对应的空域基向量数量为1，哪个TRP对应的空域基向量数量为2。其他比特位的取值可以自定义，比如XXXX可以是0000，或者也可以全置1，比如XXXX可以是1111，本申请对此不作限定。对于不具有指示含义的比特位，网络设备可以不解析。
终端设备还可以通过该指示信息向网络设备指示确定的2个TRP。换句话说，终端设备还可以通过该指示信息向网络设备指示确定的2个TRP究竟是哪两个。该指示信息可以是bitmap，此处可以参考上述方式1中关于bitmap的说明，不再赘述。示例地，bitmap为0101，则网络设备可以确定TRP#2对应的空域基向量数量为2，TRP#4对应的空域基向量数量为1。
方式3:对应于步骤502中的方式一，指示信息#B可以包括个比特，个比特分为Q组，Q组中的任一组包括个比特，这Q个组分别与Q个TRP对应，其中与N个TRP对应的N组比特分别用于指示N个TRP分别对应的空域基向量数量在空域基向量数量取值候选集合中的索引，Y为所述空域基向量数量取值候选集合中所包含的元素个数。
示例地，Q取值为4，N取值为2，空域基向量数量取值候选集合为Y为4，则该指示信息可以包括8个比特。可选地，中，取值为1对应索引0，取值为2对应索引1，取值为4对应索引2，取值为6对应索引3。这8个比特分为4组，每一组中的2个比特用于指示一个TRP对应的空域基向量数量在空域基向量数量取值候选集合中的索引。举个例子，该8个比特为00010011。
终端设备还可以通过该指示信息向网络设备指示确定的2个TRP。换句话说，终端设备还可以通过该指示信息向网络设备指示确定的2个TRP究竟是哪两个。该指示信息可以是bitmap，此处可以参考上述方式1中关于bitmap的说明，不再赘述。示例地，bitmap为0101，则网络设备可以确定终端设备选择的TRP为TRP#2和TRP#4。
网络设备结合bitmap和上述8个比特，可以确定2个TRP分别对应的空域基向量数量。00010011中，01用于指示TRP#2对应的空域基向量数量在空域基向量数量取值候选集合中的索引为1，即TRP#2对应的空域基向量数量为2,11用于指示TRP#4对应的空域基向量数量在空域基向量数量取值候选集合中的索引为3，即TRP#4对应的空域基向量数量为6。
应理解，上述示例00010011中，前两位的00与第五位和第六位的00并无含义，前两位的00、第五位和第六位的00对应的是未选择的TRP的位置。换句话说，未选择的TRP对应的比特位的取值可以自定义，比如可以是置0，或者也可以全置1，本申请对此不作限定。对于不具有指示含义的比特位，网络设备可以不解析。
可选地，上述方式2和方式3中的指示信息可以承载于CSI part1中。
方式4：对应于步骤502中的方式二，该指示信息可以用于指示第一对应关系中的索引。
示例地，当第一对应关系和第二对应关系为表格形式时，该指示信息可以用于指示表格中的索引。举个例子，N取值为2，则该指示信息可以用于指示表3中的某一个索引，该索引对应一种取值组合。
一种可能的实现，该索引号所占开销为其中Xn为N＝n对应表格中满足对应的行数(表格中的前Xn行均满足)。其中，Ln为各TRP分别对应的空域基向量数量，Lmax为第一参数。
由于步骤501的方式二中的表格设计时，行间顺序按照的取值从小到大排列，在网络 设备配置好Lmax时，终端设备在上报Ln取值组合时可以使用协议预定义表格的一部分，从而减小在指示信息中上报索引的开销。以Lmax＝4为例，四个表格中满足约束的分别为表2的前3行、表3的前4行、表4的前4行、表5的第1行，即X1＝3、X2＝4、X3＝4、X4＝1，此时X＝max{X1,…,XN}＝4，在指示信息中需比特来指示Ln取值组合，而非表格的实际维度(最大开销为比特)，能够节省上报开销。
终端设备还可以通过该指示信息向网络设备指示确定的2个TRP。换句话说，终端设备还可以通过该指示信息向网络设备指示确定的2个TRP究竟是哪两个。该指示信息可以包括bitmap，此处可以参考上述方式1中关于bitmap的说明，不再赘述。示例地，bitmap为0101，则网络设备可以确定终端设备选择的TRP为TRP#2和TRP#4。
结合指示信息和bitmap，网络设备可以确定TRP为TRP#2和TRP#4分别对应的空域基向量数量。
可选地，在上述方式1至方式4中，bitmap可以承载于第一指示信息中。
应理解，本申请中的数值、对应关系、索引、bitmap等仅作为一种示例而非限定。
步骤503：网络设备根据该N个CSI-RS资源分别对应的空域基向量数量确定预编码矩阵。
具体地，网络设备确定预编码矩阵的方式可以参考前文描述，这里不再赘述。
该方法中，终端设备确定多个TRP各自对应的空域基向量的数量后，上报给网络设备，使得网络设备能够获取多个TRP各自对应的空域基向量的数量，从而使能网络设备确定多个TRP各自的预编码矩阵，便于网络设备获取精确的信道状态，从而提升了通信质量。
本申请实施例提出又一种信道状态参数的上报方法，该通信方法中，由网络设备配置好各TRP分别对应的空域基向量数量，终端设备自主确定TRP。该方法如图5所示，可以包括下述步骤：
步骤601：网络设备向终端设备发送指示信息#A，对应地，终端设备接收该指示信息#A。
该指示信息#A用于指示Q个TRP对应的空域基向量数量。可选地，指示信息#A可以是配置信息。
一种可能的实现A，所述配置信息用于指示第三对应关系。第三对应关系为索引与各TRP分别对应的空域基向量数量之间的对应关系。
可选地，第三对应关系属于第四对应关系。该第四对应关系可以是网络设备确定的，或者协议预定义的，或者是预配置的，本申请对此不作限定。
一种可能的情况，第四对应关系可以通过表格的形式呈现。如表6至表9所示：
表6 Q＝1时索引与空域基向量数量取值的对应关系
表7 Q＝2时索引与空域基向量数量取值的对应关系
表8 Q＝3时索引与空域基向量数量取值的对应关系
表9 Q＝4时索引与空域基向量数量取值的对应关系
应理解，为了简洁起见，上述表6至表9中并未对所有取值组合一一列举。应理解，上述表格中的数值只作为一种示例而非限定。换句话说，对应于Q的不同取值，网络设备配置各种取值情况下的对应关系。
指示信息#A可以用于向终端设备指示上述表格中的某一行(第三对应关系的一个示例)。Q的值是网络设备与终端设备共知的，以表9为例，在Q＝4的前提下，网络设备可以向终端设备指示索引2(即指示信息#A指示索引2)，则相当于网络设备向终端设备指示了L1、L2、L3、L4各自的取值为2、2、1、1。
另一种可能的实现B，网络设备依次配置Q个TRP对应的空域基向量数量的取值。一种可能的方式，网络设备向终端设备发送指示信息，该指示信息用于指示各TRP分别对应的空域基向量数量在空域基向量数量取值候选集合中的索引。具体地，可以参考步骤402中的方式2中的说明，这里不展开叙述。
步骤602：终端设备确定N个TRP。
可选地，该N个TRP是从Q个TRP中确定的。具体地，可以参考步骤601中的相关说明，这里不再赘述。
步骤603：终端设备向网络设备发送指示信息#B，对应地，网络设备接收该指示信息#B。
由于网络设备已经配置好了各TRP分别对应的空域基向量数量，终端设备在确定好N个TRP，向网络设备指示是哪几个TRP即可。该指示信息#B用于指示步骤502中的N个TRP。
一种可能的方式，该指示信息#B为bitmap。该bitmap用于指示N个TRP。该bitmap的位数与Q有关。具体地，可以参考步骤402中关于bitmap的说明，这里不再赘述。
网络设备根据指示信息#B确定N个TRP，可以进一步确定N个TRP分别对应的空域基向量数量。
示例地，指示信息#B为0101，网络设备可以根据指示信息#B确定TRP有两个，且分别为TRP#2和TRP#4。又因为4个(此时Q取4)TRP分别对应的空域基向量数量是网络设备配置的(比如步骤601中实现A或者实现B)，网络设备可以直接确定TRP#2和TRP#4分别对应的空域基向量数量。即，网络设备确定TRP#2对应的空域基向量数量为L2取值2，TRP#4对应的空域基向量数量为L4取值1。
步骤604：网络设备根据N个TRP分别对应的空域基向量数量，确定预编码矩阵。
具体地，网络设备确定预编码矩阵的方式可以参考前文描述，这里不再赘述。
应理解，上述方案说明中以空域基向量作为示例，但本申请不限于此。比如，将上文中的空域基向量替换为端口个数，上述方法同样适用，只是在相关的数值上有所变化。
该方法中，终端设备确定多个TRP各自对应的空域基向量的数量后，上报给网络设备，使得网络设备能够获取多个TRP各自对应的空域基向量的数量，从而使能网络设备确定多个TRP各自的预编码矩阵。并且，在该方式中，终端设备上报N个TRP的选择即可，进一步节省了开销。
本文中描述的各个实施例可以为独立的方案，也可以根据内在逻辑进行组合，这些方案都落入本申请的保护范围中。应理解，上述实施例的步骤只是为了清楚描述实施例的技术方案，不对步骤执行的先后顺序做限定。
上述本申请提供的实施例中，分别从各个设备之间交互的角度对本申请实施例提供的方法进行了介 绍。为了实现上述本申请实施例提供的方法中的各功能，网络设备或终端设备可以包括硬件结构和/或软件模块，以硬件结构、软件模块、或硬件结构加软件模块的形式来实现上述各功能。上述各功能中的某个功能以硬件结构、软件模块、还是硬件结构加软件模块的方式来执行，取决于技术方案的特定应用和设计约束条件。
本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。另外，在本申请各个实施例中的各功能模块可以集成在一个处理器中，也可以是单独物理存在，也可以两个或两个以上模块集成在一个模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。
以下，结合图7至图8详细说明本申请实施例提供的通信装置。应理解，装置实施例的描述与方法实施例的描述相互对应，因此，未详细描述的内容可以参见上文方法实施例，为了简洁，这里不再赘述。
与上述构思相同，如图7所示，本申请实施例提供一种通信装置700用于实现上述方法中终端设备或者网络设备的功能。例如，该装置可以为软件模块或者芯片系统。本申请实施例中，芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。该装置700可以包括：处理单元710和通信单元720。
本申请实施例中，通信单元也可以称为收发单元、收发模块，可以包括发送单元和/或接收单元，分别用于执行上文方法实施例中感知节点发送和接收的步骤。
通信单元也可以称为收发器、收发机、收发装置等。处理单元也可以称为处理器，处理单板，处理模块、处理装置等。可选的，可以将通信单元720中用于实现接收功能的器件视为接收单元，将通信单元720中用于实现发送功能的器件视为发送单元，即通信单元720包括接收单元和发送单元。通信单元有时也可以称为收发机、收发器、或接口电路等。接收单元有时也可以称为接收机、接收器、或接收电路等。发送单元有时也可以称为发射机、发射器或者发射电路等。
通信装置700执行上面实施例中图5所示的方法中终端设备的功能时：
处理单元用于获取N个信道状态信息参考信号资源TRP分别对应的空域基向量数量。
一种可能的方式，处理单元用于根据第一参数和空域基向量数量取值候选集合获取N个TRP分别对应的空域基向量数量。该第一参数用于指示N个TRP分别对应的空域基向量数量之和的最大值，第一参数小于或等于Q个TRP支持的空域基向量数量总和。
一种可能的方式，处理单元用于根据第一参数和第一对应关系获取N个TRP分别对应的空域基向量数量。第一对应关系为第一索引与N个TRP分别对应的空域基向量数量的对应关系。
一种可能的方式，处理单元用于根据第三对应关系获取N个TRP分别对应的空域基向量数量。第三对应关系为索引与各TRP分别对应的空域基向量数量之间的对应关系。第三对应关系可以是网络设备确定的。
具体地，处理单元可以执行如图5所示的步骤中获取N个TRP分别对应的空域基向量数量的方式，这里不再赘述。
通信单元用于接收指示信息，该指示信息用于指示N个TRP分别对应的空域基向量数量。
一种可能的方式，该指示信息可以包括第一指示信息和第二指示信息，其中，第一指示信息用于指示N个TRP分别对应的空域基向量数量的总和，第二指示信息用于指示N个TRP分别对应的空域基向量数量。
可选地，第二指示信息可以用于指示N个TRP分别对应的空域基向量。
一种可能的方式，该指示信息可以用于指示第一对应关系的索引。
一种可能的方式，该指示信息包括bitmap，该bitmap用于指示N个TRP。
具体地，通信单元可以执行如图5所示的步骤中发送指示信息的方式，这里不再赘述。
通信装置700执行上面实施例中5中所示的方法中网络设备的功能时：
通信单元用于接收指示信息，指示信息用于指示N个TRP分别对应的空域基向量数量。
处理单元用于根据指示信息确定N个TRP分别对应的空域基向量数量。
以上只是示例，处理单元710和通信单元720还可以执行其他功能，更详细的描述可以参考图5或图6所示的方法实施例或其他方法实施例中的相关描述，这里不加赘述。
如图8所示为本申请实施例提供的通信装置800，图8所示的装置可以为图7所示的装置的一种硬件电路的实现方式。该通信装置可适用于前面所示出的流程图中，执行上述方法实施例中终端设备或者网络设备的功能。为了便于说明，图8仅示出了该通信装置的主要部件。
通信装置800可以是终端设备，能够实现本申请实施例提供的方法中终端设备的功能。通信装置800也可以是能够支持终端设备实现本申请实施例提供的方法中对应的功能的装置。通信装置800可以是网络设备，能够实现本申请实施例提供的方法中网络设备的功能。通信装置800也可以是能够支持网络设备实现本申请实施例提供的方法中对应的功能的装置。其中，该通信装置800可以为芯片系统。本申请实施例中，芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。具体的功能可以参见上述方法实施例中的说明。
通信装置800包括一个或多个处理器810，用于实现或用于支持通信装置800实现本申请实施例提供的方法中终端设备或网络设备的功能。具体参见方法示例中的详细描述，此处不做赘述。处理器810也可以称为处理单元或处理模块，可以实现一定的控制功能。处理器810可以是通用处理器或者专用处理器等。例如，包括：中央处理器，基带处理器，应用处理器，调制解调处理器，图形处理器，图像信号处理器，数字信号处理器，视频编解码处理器，控制器，和/或神经网络处理器等。所述中央处理器可以用于对通信装置800进行控制，执行软件程序和/或处理数据。不同的处理器可以是独立的器件，也可以是集成在一个或多个处理器中，例如，集成在一个或多个专用集成电路上。可以理解的是，本申请的实施例中的处理器可以是中央处理单元(central processing unit，CPU)，还可以是其它通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现场可编程门阵列(field programmable gate array，FPGA)或者其它可编程逻辑器件、晶体管逻辑器件，硬件部件或者其任意组合。通用处理器可以是微处理器，也可以是任何常规的处理器。
可选地，通信装置800中包括一个或多个存储器820，用以存储指令840，所述指令可在所述处理器810上被运行，使得通信装置800执行上述方法实施例中描述的方法。存储器820和处理器810耦合。本申请实施例中的耦合是装置、单元或模块之间的间接耦合或通信连接，可以是电性，机械或其它的形式，用于装置、单元或模块之间的信息交互。处理器810可能和存储器820协同操作。所述至少一个存储器中的至少一个可以包括于处理器中。需要说明的是，存储器820不是必须的，所以在图8中以虚线进行示意。
可选地，所述存储器820中还可以存储有数据。所述处理器和存储器可以单独设置，也可以集成在一起。在本申请实施例中，存储器820可以是非易失性存储器，比如硬盘(hard disk drive，HDD)或固态硬盘(solid-state drive，SSD)等，还可以是易失性存储器(volatile memory)，例如随机存取存储器(random-access memory，RAM)。本申请的实施例中处理器还可以是闪存、只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)、寄存器、硬盘、移动硬盘、CD-ROM或者本领域熟知的任何其它形式的存储介质中。一种示例性的存储介质耦合至处理器，从而使处理器能够从该存储介质读取信息，且可向该存储介质写入信息。当然，存储介质也可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。另外，该ASIC可以位于网络设备或终端设备中。当然，处理器和存储介质也可以作为分立组件存在于网络设备或终端设备中。
存储器是能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。本申请实施例中的存储器还可以是电路或者其它任意能够实现存储功能的装置，用于存储程序指令和/或数据。
可选地，通信装置800可以包括指令830(有时也可以称为代码或程序)，所述指令830可以在所述处理器上被运行，使得所述通信装置800执行上述实施例中描述的方法。处理器810中可以存储数据。
可选地，通信装置800还可以包括收发器850以及天线860。所述收发器850可以称为收发单元，收发模块、收发机、收发电路、收发器，输入输出接口等，用于通过天线860实现通信装置800的收发功能。
本申请中描述的处理器810和收发器850可实现在集成电路(integrated circuit，IC)、模拟IC、射频集成电路(radio frequency identification，RFID)、混合信号IC、ASIC、印刷电路板(printed circuit board，PCB)、或电子设备等上。实现本文描述的通信装置，可以是独立设备(例如，独立的集成电路，手机等)，或者可以是较大设备中的一部分(例如,可嵌入在其他设备内的模块)，具体可以参照前述关于终端设备，以及网络设备的说明，在此不再赘述。
可选地，通信装置800还可以包括以下一个或多个部件：无线通信模块，音频模块，外部存储器接口，内部存储器，通用串行总线(universal serial bus，USB)接口，电源管理模块，天线，扬声器，麦克 风，输入输出模块，传感器模块，马达，摄像头，或显示屏等等。可以理解，在一些实施例中，通信装置800可以包括更多或更少部件，或者某些部件集成，或者某些部件拆分。这些部件可以是硬件，软件，或者软件和硬件的组合实现。
本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (61)

  1. 一种信道状态参数的上报方法，其特征在于，包括：
    获取N个信道状态信息参考信号CSI-RS资源分别对应的空域基向量数量，所述N个CSI-RS资源是从Q个CSI-RS资源中确定的，所述N为小于或等于Q的正整数，所述Q为大于或等于1的正整数；
    发送指示信息，所述指示信息用于指示所述N个CSI-RS资源分别对应的空域基向量数量。
  2. 根据权利要求1所述的方法，其特征在于，所述方法还包括：
    获取第一参数，所述第一参数用于指示所述N个CSI-RS资源分别对应的空域基向量数量之和的最大值；
    根据所述第一参数确定所述N个CSI-RS资源分别对应的空域基向量数量。
  3. 根据权利要求2所述的方法，其特征在于，所述获取所述N个CSI-RS资源分别对应的空域基向量数量包括：
    根据所述第一参数和空域基向量数量取值候选集合，获取所述N个CSI-RS资源分别对应的空域基向量数量，所述空域基向量数量取值候选集合包括至少一个取值，所述N个CSI-RS资源分别对应的空域基向量数量中的任一空域基向量数量属于所述空域基向量数量取值候选集合。
  4. 根据权利要求3所述的方法，其特征在于，所述指示信息用于指示所述N个CSI-RS资源分别对应的空域基向量数量，包括：
    所述指示信息包括第一指示信息和第二指示信息，其中，所述第一指示信息用于指示所述N个CSI-RS资源分别对应的空域基向量数量的总和，所述第二指示信息用于指示所述N个CSI-RS资源分别对应的空域基向量数量。
  5. 根据权利要求4所述的方法，其特征在于，所述第二指示信息用于指示所述N个CSI-RS资源分别对应的空域基向量。
  6. 根据权利要求5所述的方法，其特征在于，所述第二指示信息包括S个比特，所述S是根据所述N、P和Ltot确定的，其中，所述P为所述N个CSI-RS资源中的任一CSI-RS资源对应的CSI-RS端口数量，所述Ltot为所述N个CSI-RS资源分别对应的空域基向量数量的总和。
  7. 根据权利要求4至6中任一项所述的方法，其特征在于，所述第一指示信息承载于信道状态信息第一部分中，所述第二指示信息承载于信道状态信息第二部分中。
  8. 根据权利要求3所述的方法，其特征在于，所述指示信息包括个比特,所述指示信息的前个比特或后个比特用于指示所述N个CSI-RS资源分别对应的空域基向量数量，所述指示信息的前个比特或后个比特中每个比特对应一个空域基向量数量在所述空域基向量数量取值候选集合中的索引，所述Y为所述空域基向量数量取值候选集合中所包含的元素个数。
  9. 根据权利要求3所述的方法，其特征在于，所述指示信息包括个比特，所述个比特分为Q组，所述Q组中的任一组包括个比特，所述Q组分别与所述Q个CSI-RS资源对应，与所述N个CSI-RS资源对应的N组比特分别用于指示所述N个CSI-RS资源分别对应的空域基向量数量在所述空域基向量数量取值候选集合中的索引，所述Y为所述空域基向量数量取值候选集合中所包含的元素个数。
  10. 根据权利要求2所述的方法，其特征在于，所述获取所述N个CSI-RS资源分别对应的空域基向量数量包括：
    根据所述第一参数和第一对应关系，获取所述N个CSI-RS资源分别对应的空域基向量数量，所述第一对应关系为第一索引与所述N个CSI-RS资源分别对应的空域基向量数量的对应关系。
  11. 根据权利要求10所述的方法，其特征在于，所述第一对应关系属于第二对应关系，所述第二对应关系包括至少两个对应关系，所述至少两个对应关系包括至少两个索引，所述至少两个索引包括所述第二索引和第三索引，所述第二索引的取值小于所述第三索引的取值，所述第二索引对应的N个CSI-RS资源分别对应的空域基向量数量之和，小于，所述第三索引对应的N个CSI-RS资源分别对应的空域基向量数量之和。
  12. 根据权利要求10或11所述的方法，其特征在于，所述指示信息用于指示N个CSI-RS资源分别 对应的空域基向量数量包括：
    所述指示信息用于指示所述第一索引。
  13. 根据权利要求2至12中任一项所述的方法，其特征在于，包括：
    接收配置信息，所述配置信息用于指示以下中的至少一项：
    所述第一参数；
    所述N个CSI-RS资源支持的空域基向量数量的平均值；
    所述Q个CSI-RS资源支持的空域基向量数量的平均值；
    所述获取第一参数包括：
    根据所述配置信息确定所述第一参数。
  14. 根据权利要求1至13中任一项所述的方法，其特征在于，所述指示信息还用于指示所述N个CSI-RS资源。
  15. 一种信道状态参数的上报方法，其特征在于，包括：
    接收指示信息，所述指示信息用于指示N个信道状态信息参考信号资源CSI-RS资源分别对应的空域基向量数量，所述N个CSI-RS资源是从Q个CSI-RS资源中确定的，所述N为小于或等于Q的正整数，所述Q为大于等于1的正整数；
    根据所述N个CSI-RS资源分别对应的空域基向量数量确定预编码矩阵。
  16. 根据权利要求1所述的方法，其特征在于，包括：
    所述N个CSI-RS资源分别对应的空域基向量数量是根据第一参数确定的，所述第一参数用于指示所述N个CSI-RS资源分别对应的空域基向量数量之和的最大值，。
  17. 根据权利要求16所述的方法，其特征在于，所述N个CSI-RS资源分别对应的空域基向量数量是根据所述第一参数确定的包括：
    所述N个CSI-RS资源分别对应的空域基向量数量是根据所述第一参数和空域基向量数量取值候选集合确定的，所述第一空域基向量数量取值候选集合包括至少一个取值，所述N个CSI-RS资源分别对应的空域基向量数量中的任一空域基向量数量属于所述空域基向量数量取值候选集合。
  18. 根据权利要求17所述的方法，其特征在于，所述指示信息用于指示所述N个CSI-RS资源分别对应的空域基向量数量包括：
    所述指示信息包括第一指示信息和第二指示信息，其中，所述第一指示信息用于指示所述N个CSI-RS资源分别对应的空域基向量数量的总和，所述第二指示信息用于指示所述N个CSI-RS资源分别对应的空域基向量数量。
  19. 根据权利要求18所述的方法，其特征在于，所述第二指示信息用于指示所述N个CSI-RS资源分别对应的空域基向量。
  20. 根据权利要求19所述的方法，其特征在于，所述第二指示信息包括S个比特，所述S是根据所述N、P和Ltot确定的，其中，所述P为所述N个CSI-RS资源中的任一CSI-RS资源对应的TRP的CSI-RS端口数量，所述Ltot为所述N个CSI-RS资源分别对应的空域基向量数量的总和。
  21. 根据权利要求18至20中任一项所述的方法，其特征在于，所述第一指示信息承载于信道状态信息第一部分中，所述第二指示信息承载于信道状态信息第二部分中。
  22. 根据权利要求17所述的方法，其特征在于，所述指示信息包括个比特,所述指示信息的前个比特或后个比特用于指示所述N个CSI-RS资源分别对应的空域基向量数量，所述指示信息的前个比特或后个比特中每个比特对应一个空域基向量数量在所述空域基向量数量取值候选集合中的索引，所述Y为所述空域基向量数量取值候选集合中所包含的元素个数。
  23. 根据权利要求17所述的方法，其特征在于，所述指示信息包括个比特，所述个比特分为Q组，所述Q组中的任一组包括个比特，所述Q组分别与所述Q个CSI-RS资源对应，与所述N个CSI-RS资源对应的N组比特分别用于指示所述N个CSI-RS资源分别对应的空域基向量数量在所述空域基向量数量取值候选集合中的索引。
  24. 根据权利要求16所述的方法，其特征在于，所述N个CSI-RS资源分别对应的空域基向量数量是根据第一参数确定的包括：
    所述N个CSI-RS资源分别对应的空域基向量数量是根据所述第一参数和第一对应关系，所述第一对 应关系为第一索引与所述N个CSI-RS资源分别对应的空域基向量数量的对应关系。
  25. 根据权利要求24所述的方法，其特征在于，所述第一对应关系属于第二对应关系，所述第二对应关系包括至少两个对应关系，所述至少两个对应关系包括至少两个索引，所述至少两个索引包括所述第二索引和第三索引，所述第二索引的取值小于所述第三索引的取值，所述第二索引对应的N个CSI-RS资源分别对应的空域基向量数量之和，小于，所述第三索引对应的N个CSI-RS资源分别对应的空域基向量数量之和。
  26. 根据权利要求24或25所述的方法，其特征在于，所述指示信息用于指示N个CSI-RS资源分别对应的空域基向量数量包括：
    所述指示信息用于指示所述第一索引。
  27. 根据权利要求16至26中任一项所述的方法，其特征在于，所述方法还包括：
    发送配置信息，所述配置信息用于确定所述第一参数，所述配置信息用于指示以下中的至少一项：
    所述第一参数；
    所述N个CSI-RS资源支持的空域基向量数量的平均值；
    所述Q个CSI-RS资源支持的空域基向量数量的平均值。
  28. 根据权利要求15至27中任一项所述的方法，其特征在于，所述指示信息还用于指示所述N个CSI-RS资源。
  29. 一种通信装置，其特征在于，所述通信装置包括处理模块和收发模块，其中，
    所述处理模块用于获取N个信道状态信息参考信号资源CSI-RS资源分别对应的空域基向量数量，所述N个CSI-RS资源是从Q个CSI-RS资源中确定的，所述N为小于或等于Q的正整数，所述Q为大于等于1的正整数；
    所述收发模块用于发送指示信息，所述指示信息用于指示所述N个CSI-RS资源分别对应的空域基向量数量。
  30. 根据权利要求29所述的装置，其特征在于，所述处理模块还用于获取第一参数，所述第一参数用于指示所述N个CSI-RS资源分别对应的空域基向量数量之和的最大值，所述处理模块还用于根据所述第一参数确定所述N个CSI-RS资源分别对应的空域基向量数量。
  31. 根据权利要求30所述的装置，其特征在于，所述处理模块还用于根据所述第一参数确定所述N个CSI-RS资源分别对应的空域基向量数量包括：
    所述处理模块用于根据所述第一参数和空域基向量数量取值候选集合，获取所述N个CSI-RS资源分别对应的空域基向量数量，所述空域基向量数量取值候选集合包括至少一个取值，所述N个CSI-RS资源分别对应的空域基向量数量中的任一空域基向量数量属于所述空域基向量数量取值候选集合。
  32. 根据权利要求31所述的装置，其特征在于，所述指示信息用于指示所述N个CSI-RS资源分别对应的空域基向量数量包括：
    所述指示信息包括第一指示信息和第二指示信息，其中，所述第一指示信息用于指示所述N个CSI-RS资源分别对应的空域基向量数量的总和，所述第二指示信息用于指示所述N个CSI-RS资源分别对应的空域基向量数量。
  33. 根据权利要求32所述的装置，其特征在于，所述第二指示信息用于指示所述N个CSI-RS资源分别对应的空域基向量。
  34. 根据权利要求33所述的装置，其特征在于，所述第二指示信息包括S个比特，所述S是根据所述N、P和Ltot确定的，其中，所述P为所述N个CSI-RS资源中的任一CSI-RS资源对应的TRP的CSI-RS端口数量，所述Ltot为所述N个CSI-RS资源分别对应的空域基向量数量的总和。
  35. 根据权利要求32至34中任一项所述的装置，其特征在于，所述第一指示信息承载于信道状态信息第一部分中，所述第二指示信息承载于信道状态信息第二部分中。
  36. 根据权利要求31所述的装置，其特征在于，所述指示信息包括个比特,所述指示信息的前个比特或后个比特用于指示所述N个CSI-RS资源分别对应的空域基向量数量，所述指示信息的前个比特或后个比特中每个比特对应一个空域基向量数量在所述空域基向量数量取值候选集合中的索引，所述Y为所述空域基向量数量取值候选集合中所包含的元素个数。
  37. 根据权利要求31所述的装置，其特征在于，所述指示信息包括个比特，所述 个比特分为Q组，所述Q组中的任一组包括个比特，所述Q组分别与所述Q个CSI-RS资源对应，与所述N个CSI-RS资源对应的N组比特分别用于指示所述N个CSI-RS资源分别对应的空域基向量数量在所述空域基向量数量取值候选集合中的索引，所述Y为所述空域基向量数量取值候选集合中所包含的元素个数。
  38. 根据权利要求30所述的装置，其特征在于，所述处理模块用于获取所述N个CSI-RS资源分别对应的空域基向量数量包括：
    所述处理模块用于根据所述第一参数和第一对应关系，获取所述N个CSI-RS资源分别对应的空域基向量数量，所述第一对应关系为第一索引与所述N个CSI-RS资源分别对应的空域基向量数量的对应关系。
  39. 根据权利要求38所述的装置，其特征在于，所述第一对应关系属于第二对应关系，所述第二对应关系包括至少两个对应关系，所述至少两个对应关系包括至少两个索引，所述至少两个索引包括所述第二索引和第三索引，所述第二索引的取值小于所述第三索引的取值，所述第二索引对应的N个CSI-RS资源分别对应的空域基向量数量之和，小于，所述第三索引对应的N个CSI-RS资源分别对应的空域基向量数量之和。
  40. 根据权利要求38或39所述的装置，其特征在于，所述指示信息用于指示N个CSI-RS资源分别对应的空域基向量数量包括：
    所述指示信息用于指示所述第一索引。
  41. 根据权利要求30至40中任一项所述的装置，其特征在于，所述收发模块还用于接收配置信息，所述配置信息用于指示以下中的至少一项：
    所述第一参数；
    所述N个CSI-RS资源支持的空域基向量数量的平均值；
    所述Q个CSI-RS资源支持的空域基向量数量的平均值；
    所述获取第一参数包括：
    所述处理模块还用于根据所述配置信息确定所述第一参数。
  42. 根据权利要求29至41中任一项所述的装置，其特征在于，所述指示信息还用于指示所述N个CSI-RS资源。
  43. 一种通信装置，其特征在于，所述通信装置包括处理模块和收发模块，其中，
    所述收发模块用于接收指示信息，所述指示信息用于指示N个信道状态信息参考信号资源CSI-RS资源分别对应的空域基向量数量，所述N个CSI-RS资源是从Q个CSI-RS资源中确定的，所述N为小于或等于Q的正整数，所述Q为大于等于1的正整数；
    所述处理模块用于根据所述N个CSI-RS资源分别对应的空域基向量数量确定预编码矩阵。
  44. 根据权利要求43所述的装置，其特征在于，所述N个CSI-RS资源分别对应的空域基向量数量是根据第一参数确定的，所述第一参数用于指示所述N个CSI-RS资源分别对应的空域基向量数量之和的最大值。
  45. 根据权利要求44所述的装置，其特征在于，所述N个CSI-RS资源分别对应的空域基向量数量是根据所述第一参数确定的包括：
    所述N个CSI-RS资源分别对应的空域基向量数量是根据所述第一参数和空域基向量数量取值候选集合确定的，所述第一空域基向量数量取值候选集合包括至少一个取值，所述N个CSI-RS资源分别对应的空域基向量数量中的任一空域基向量数量属于所述空域基向量数量取值候选集合。
  46. 根据权利要求45所述的装置，其特征在于，所述指示信息用于指示所述N个CSI-RS资源分别对应的空域基向量数量包括：
    所述指示信息包括第一指示信息和第二指示信息，其中，所述第一指示信息用于指示所述N个CSI-RS资源分别对应的空域基向量数量的总和，所述第二指示信息用于指示所述N个CSI-RS资源分别对应的空域基向量数量。
  47. 根据权利要求46所述的装置，其特征在于，所述第二指示信息用于指示所述N个CSI-RS资源分别对应的空域基向量。
  48. 根据权利要求47所述的装置，其特征在于，所述第二指示信息包括S个比特，所述S是根据所述N、P和Ltot确定的，其中，所述P为所述N个CSI-RS资源中的任一CSI-RS资源对应的TRP的CSI-RS端口数量，所述Ltot为所述N个CSI-RS资源分别对应的空域基向量数量的总和。
  49. 根据权利要求46至48中任一项所述的装置，其特征在于，所述第一指示信息承载于信道状态信息第一部分中，所述第二指示信息承载于信道状态信息第二部分中。
  50. 根据权利要求45所述的装置，其特征在于，所述指示信息包括个比特，所述指示信息的前个比特或后个比特用于指示所述N个CSI-RS资源分别对应的空域基向量数量，所述指示信息的前个比特或后个比特中每个比特对应一个空域基向量数量在所述空域基向量数量取值候选集合中的索引，所述Y为所述空域基向量数量取值候选集合中所包含的元素个数。
  51. 根据权利要求45所述的装置，其特征在于，所述指示信息包括个比特，所述个比特分为Q组，所述Q组中的任一组包括个比特，所述Q组分别与所述Q个CSI-RS资源对应，与所述N个CSI-RS资源对应的N组比特分别用于指示所述N个CSI-RS资源分别对应的空域基向量数量在所述空域基向量数量取值候选集合中的索引。
  52. 根据权利要求44所述的装置，其特征在于，所述N个CSI-RS资源分别对应的空域基向量数量是根据第一参数确定的包括：
    所述N个CSI-RS资源分别对应的空域基向量数量是根据所述第一参数和第一对应关系确定的，所述第一对应关系为第一索引与所述N个CSI-RS资源分别对应的空域基向量数量的对应关系。
  53. 根据权利要求52所述的装置，其特征在于，所述第一对应关系属于第二对应关系，所述第二对应关系包括至少两个对应关系，所述至少两个对应关系包括至少两个索引，所述至少两个索引包括所述第二索引和第三索引，所述第二索引的取值小于所述第三索引的取值，所述第二索引对应的N个CSI-RS资源分别对应的空域基向量数量之和，小于，所述第三索引对应的N个CSI-RS资源分别对应的空域基向量数量之和。
  54. 根据权利要求52或53所述的装置，其特征在于，所述指示信息用于指示N个CSI-RS资源分别对应的空域基向量数量包括：
    所述指示信息用于指示所述第一索引。
  55. 根据权利要求16至26中任一项所述的装置，其特征在于，所述收发模块还用于发送配置信息，所述配置信息用于确定所述第一参数，所述配置信息用于指示以下中的至少一项：
    所述第一参数；
    所述N个CSI-RS资源支持的空域基向量数量的平均值；
    所述Q个CSI-RS资源支持的空域基向量数量的平均值。
  56. 根据权利要求43至55中任一项所述的装置，其特征在于，所述指示信息还用于指示所述N个CSI-RS资源。
  57. 一种通信装置，其特征在于，所述装置包括处理器，所述处理器与存储器耦合，所述存储器存储有指令，所述指令被所述处理器运行时，使得所述处理器执行如权利要求1至14中任一项所述的方法，或执行如权利要求15至28中任一项所述的方法。
  58. 一种通信装置，其特征在于，所述装置包括逻辑电路，所述逻辑电路用于与输入/输出接口耦合，通过所述输入/输出接口传输数据，以执行如权利要求1至14中任一项所述的方法，或执行如权利要求15至28中任一项所述的方法。
  59. 一种通信系统，其特征在于，所述系统包括如权利要求29至42中任一项所述的通信装置，和，如权利要求43至56中任一项所述的通信装置。
  60. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质用于存储计算机程序，当所述计算机程序在计算机上运行时，使得所述计算机执行如权利要求1至14中任一项所述的方法，或执行如权利要求15至28中任一项所述的方法。
  61. 一种计算机程序产品，其特征在于，所述计算机程序产品包括：计算机程序代码，当所述计算机程序代码被运行时，实现如权利要求1至14中任一项所述的方法，或执行如权利要求15至28中任一项所述的方法。
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