Channel state information (CSI) reporting method, device, and apparatus

Abstract

The present disclosure provides a channel state information (CSI) reporting method, a device, and an apparatus. The method comprises: receiving CSI reporting configuration information sent by a network device, wherein the CSI reporting configuration information is associated with a plurality of reference signal resources; measuring the plurality of reference signal resources to obtain respective measurement results of the plurality of reference signal resources, wherein the measurement results comprise reference signal resource indications; and sending CSI to the network device on the basis of the CSI reporting configuration information and the respective measurement results of the plurality of reference signal resources, wherein the CSI comprises a first quantity of reference signal resource indications, and the first quantity is greater than or equal to 2.

Description

Channel State Information (CSI) reporting method, device, and apparatus

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202410076304X, filed on January 18, 2024, entitled “Channel State Information CSI Reporting Method, Device and Apparatus,” which is incorporated herein by reference in its entirety. Technical Field

[0003] The present disclosure relates to the field of communication technology, and in particular to a method, device, and apparatus for reporting channel state information (CSI). Background Art

[0004] In the 5G New Radio (NR), network equipment can obtain the channel characteristics of the simulated beam corresponding to the reference signal resource based on the terminal's channel state information (CSI) feedback, and thus perform terminal pairing transmission under the corresponding simulated beam based on the channel characteristics.

[0005] In related technologies, a network device can configure the reference signal resources to be measured for the terminal, and for each reference signal resource to be measured, the terminal feeds back the corresponding CSI. However, this CSI feedback method has low flexibility. Summary of the Invention

[0006] The present disclosure provides a method, device and apparatus for reporting channel state information (CSI) to improve the flexibility of CSI feedback methods.

[0007] In a first aspect, the present disclosure provides a CSI reporting method, applied to a terminal, the method comprising:

[0008] receiving CSI reporting configuration information sent by a network device, where the CSI reporting configuration information is associated with multiple reference signal resources;

[0009] measuring a plurality of reference signal resources to obtain measurement results for each of the plurality of reference signal resources, the measurement results including a reference signal resource indication;

[0010] Based on the CSI reporting configuration information and the measurement results of each of the multiple reference signal resources, CSI is sent to the network device, where the CSI includes a first number of reference signal resource indications, and the first number is at least two.

[0011] In some embodiments, sending CSI to a network device based on CSI reporting configuration information and measurement results of each of a plurality of reference signal resources includes:

[0012] Determine a CSI reporting mode based on the CSI reporting configuration information, where the CSI reporting mode includes a secondary reporting mode or a tertiary reporting mode;

[0013] Determine CSI information of each level from measurement results of multiple reference signal resources based on CSI reporting configuration information and CSI reporting mode;

[0014] Based on the information of CSI at each level, CSI is sent to the network device.

[0015] In some embodiments, the CSI reporting configuration information is used to indicate any of the following:

[0016] For each port type, the number of reference signal resource indicators to be reported in the reference signal resources corresponding to each port type is K;

[0017] The total number of reference signal resource indications to be reported among the multiple reference signal resources is K;

[0018] For each port type, the number of reference signal resource indicators to be reported in the reference signal resources corresponding to each port type is at most K;

[0019] The total number of reference signal resource indications to be reported among the multiple reference signal resources is at most K;

[0020] K is a positive integer greater than 1.

[0021] In some embodiments, when the CSI reporting configuration information indicates that for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is K, or when the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported in multiple reference signal resources is K, the CSI reporting mode is a secondary reporting mode;

[0022] When the CSI reporting configuration information indicates that for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is at most K, or when the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported in multiple reference signal resources is at most K, the CSI reporting mode is the secondary reporting mode or the tertiary reporting mode.

[0023] In some embodiments, the CSI reporting method is a secondary reporting method. For the first-level CSI in the secondary reporting method, any one of the following conditions is met:

[0024] When the CSI reporting configuration information indicates that, for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is K, then, for each port type, the first-level CSI includes reference signal resource indications of the K reference signal resources corresponding to each port type;

[0025] In a case where the total number of reference signal resource indications to be reported among multiple reference signal resources indicated in the CSI reporting configuration information is K, the first-level CSI includes reference signal resource indications of the K reference signal resources;

[0026] When the CSI reporting configuration information indicates that, for each port type, the number of reference signal resources corresponding to each port type and the number of reference signal resource indications to be reported are both at most K, then, for each port type, the first-level CSI includes, for each port type, reference signal resource indications of R reference signal resources corresponding to each port type, where R is a positive integer greater than or equal to 1 and less than or equal to K.

[0027] When the CSI reporting configuration information indicates multiple reference signal resources and the total number of reference signal resource indications to be reported is at most K, the first-level CSI includes reference signal resource indications of R reference signal resources.

[0028] In some embodiments, when the CSI reporting configuration information indicates that, for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is at most K, or indicates that the total number of reference signal resource indications to be reported in multiple reference signal resources is at most K, for the first level CSI, based on information of the CSI at each level, sending the CSI to the network device includes:

[0029] Sending the first level CSI to the network device based on a bitmap, where the number of bits in the bitmap is determined based on the number of the plurality of reference signal resources;

[0030] and / or,

[0031] The first level CSI is sent to the network device based on a plurality of information fields, where the number of the plurality of information fields is determined based on the number of reference signal resource indications included in the CSI.

[0032] In some embodiments, the CSI reporting method is a three-level reporting method. For the first-level CSI and the second-level CSI in the three-level reporting method, any one of the following conditions is met:

[0033] When the CSI reporting configuration information indicates that, for a port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is at most K, then, for each port type, the first-level CSI includes the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type, and the second-level CSI includes reference signal resource indications of R reference signal resources corresponding to each port type, where R is a positive integer greater than or equal to 1 and less than or equal to K.

[0034] When the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported among multiple reference signal resources is at most K, the first-level CSI includes the total number of reference signal resource indications to be reported, and the second-level CSI includes the reference signal resource indications of R reference signal resources.

[0035] In some embodiments, the CSI reporting configuration information is further used to indicate a reporting rank indication, where:

[0036] When the CSI reporting mode is the secondary reporting mode, the first-level CSI also includes M rank indicators; M is a positive integer greater than or equal to 1 and less than or equal to K;

[0037] When the CSI reporting mode is a three-level reporting mode, the second-level CSI further includes M rank indicators.

[0038] In some embodiments, the method further comprises:

[0039] When the uplink resource allocated by the network device to the terminal is less than the uplink resource required for transmitting the CSI, determining the number of CSIs, where the number of CSIs is one or more;

[0040] Based on the number of CSIs, determine the target CSI in the CSIs;

[0041] In the target CSI, all or part of the information in the last level CSI is discarded;

[0042] Among them, when the CSI reporting mode is a two-level reporting mode, the last level CSI is the second-level CSI; when the CSI reporting mode is a three-level reporting mode, the last level CSI is the third-level CSI.

[0043] In some embodiments, determining a target CSI in the CSI based on the amount of CSI includes:

[0044] When the number of CSIs is one, the CSI is determined as the target CSI;

[0045] When there are multiple CSIs, the target CSI is determined among the multiple CSIs based on their priorities.

[0046] In some embodiments, in the target CSI, all or part of the information in the last level CSI is discarded, including:

[0047] determining a reference signal resource indication priority of each of the first number of reference signal resource indications included in the target CSI;

[0048] determining, based on the reference signal resource indication priority, a second number of target reference signal resource indications from the first number of reference signal resource indications, the second number being less than or equal to the first number;

[0049] Information corresponding to the second number of target reference signal resource indications in the last level of CSI is discarded.

[0050] In some embodiments, for each target reference signal resource indication, discarding information corresponding to a second number of target reference signal resource indications in the last level CSI includes:

[0051] Determine the bandwidth priority of wideband CSI, even subband CSI, and odd subband CSI, with the bandwidth priorities of wideband CSI, even subband CSI, and odd subband CSI decreasing in sequence; based on the bandwidth priority, discard all or part of the information corresponding to the target reference signal resource indication;

[0052] or,

[0053] Determine a precoding matrix indication PMI grouping priority corresponding to the target reference signal resource indication; and discard all or part of information corresponding to the target reference signal resource indication based on the PMI grouping priority.

[0054] In a second aspect, the present disclosure provides a CSI reporting method, applied to a network device, the method comprising:

[0055] Send CSI reporting configuration information to the terminal, where the CSI reporting configuration information is associated with multiple reference signal resources;

[0056] Based on the CSI reporting configuration information, CSI sent by the terminal is received, where the CSI includes a first number of reference signal resource indicators, and the first number is at least two.

[0057] In some embodiments, the CSI reporting configuration information is used to determine the CSI reporting mode and information of CSI at each level. Receiving CSI sent by the terminal based on the CSI reporting configuration information includes:

[0058] Based on the information of CSI at each level, the CSI sent by the terminal is received, wherein the CSI reporting method includes a secondary reporting method or a tertiary reporting method.

[0059] In some embodiments, the CSI reporting configuration information is used to indicate any of the following:

[0060] For each port type, the number of reference signal resource indicators to be reported in the reference signal resources corresponding to each port type is K;

[0061] The total number of reference signal resource indications to be reported among the multiple reference signal resources is K;

[0062] For each port type, the number of reference signal resource indicators to be reported in the reference signal resources corresponding to each port type is at most K;

[0063] The total number of reference signal resource indications to be reported among the multiple reference signal resources is at most K;

[0064] K is a positive integer greater than 1.

[0065] In some embodiments, when the CSI reporting configuration information indicates that for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is K, or when the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported in multiple reference signal resources is K, the CSI reporting mode is a secondary reporting mode;

[0066] When the CSI reporting configuration information indicates that for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is at most K, or when the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported in multiple reference signal resources is at most K, the CSI reporting mode is the secondary reporting mode or the tertiary reporting mode.

[0067] In some embodiments, the CSI reporting method is a secondary reporting method. For the first-level CSI in the secondary reporting method, any one of the following conditions is met:

[0068] When the CSI reporting configuration information indicates that, for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is K, then, for each port type, the first-level CSI includes reference signal resource indications of the K reference signal resources corresponding to each port type;

[0069] In a case where the total number of reference signal resource indications to be reported among multiple reference signal resources indicated in the CSI reporting configuration information is K, the first-level CSI includes reference signal resource indications of the K reference signal resources;

[0070] When the CSI reporting configuration information indicates that, for each port type, the number of reference signal resources corresponding to each port type and the number of reference signal resource indications to be reported are both at most K, then, for each port type, the first-level CSI includes, for each port type, reference signal resource indications of R reference signal resources corresponding to each port type, where R is a positive integer greater than or equal to 1 and less than or equal to K.

[0071] When the CSI reporting configuration information indicates multiple reference signal resources and the total number of reference signal resource indications to be reported is at most K, the first-level CSI includes reference signal resource indications of R reference signal resources.

[0072] In some embodiments, when the CSI reporting configuration information indicates that, for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is at most K, or indicates that the total number of reference signal resource indications to be reported in multiple reference signal resources is at most K, for the first level CSI, based on information of the CSI at each level, receiving the CSI sent by the terminal includes:

[0073] receiving, based on a bitmap, first-level CSI sent by the terminal, where the number of bits in the bitmap is determined based on the number of the plurality of reference signal resources;

[0074] and / or,

[0075] The first-level CSI sent by the terminal is received based on multiple information fields, where the number of the multiple information fields is determined based on the number of reference signal resource indicators included in the CSI.

[0076] In some embodiments, the CSI reporting method is a three-level reporting method. For the first-level CSI and the second-level CSI in the three-level reporting method, any one of the following conditions is met:

[0077] When the CSI reporting configuration information indicates that, for a port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is at most K, then, for each port type, the first-level CSI includes the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type, and the second-level CSI includes reference signal resource indications of R reference signal resources corresponding to each port type, where R is a positive integer greater than or equal to 1 and less than or equal to K.

[0078] When the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported among multiple reference signal resources is at most K, the first-level CSI includes the total number of reference signal resource indications to be reported, and the second-level CSI includes the reference signal resource indications of R reference signal resources.

[0079] In some embodiments, the CSI reporting configuration information is further used to indicate a reporting rank indication, where:

[0080] When the CSI reporting mode is the secondary reporting mode, the first-level CSI also includes M rank indicators; M is a positive integer greater than or equal to 1 and less than or equal to K;

[0081] When the CSI reporting mode is a three-level reporting mode, the second-level CSI further includes M rank indicators.

[0082] In a third aspect, the present disclosure provides a terminal including a memory, a transceiver, and a processor;

[0083] A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of a processor; and a processor for reading the computer program in the memory and performing the following operations:

[0084] receiving CSI reporting configuration information sent by a network device, where the CSI reporting configuration information is associated with multiple reference signal resources;

[0085] measuring a plurality of reference signal resources to obtain measurement results for each of the plurality of reference signal resources, the measurement results including a reference signal resource indication;

[0086] Based on the CSI reporting configuration information and the measurement results of each of the multiple reference signal resources, CSI is sent to the network device, where the CSI includes a first number of reference signal resource indications, and the first number is at least two.

[0087] In some embodiments, sending CSI to a network device based on CSI reporting configuration information and measurement results of each of a plurality of reference signal resources includes:

[0088] Determine a CSI reporting mode based on the CSI reporting configuration information, where the CSI reporting mode includes a secondary reporting mode or a tertiary reporting mode;

[0089] Determine CSI information of each level from measurement results of multiple reference signal resources based on CSI reporting configuration information and CSI reporting mode;

[0090] Based on the information of CSI at each level, CSI is sent to the network device.

[0091] In some embodiments, the CSI reporting configuration information is used to indicate any of the following:

[0092] For each port type, the number of reference signal resource indicators to be reported in the reference signal resources corresponding to each port type is K;

[0093] The total number of reference signal resource indications to be reported among the multiple reference signal resources is K;

[0094] For each port type, the number of reference signal resource indicators to be reported in the reference signal resources corresponding to each port type is at most K;

[0095] The total number of reference signal resource indications to be reported among the multiple reference signal resources is at most K;

[0096] K is a positive integer greater than 1.

[0097] In some embodiments, when the CSI reporting configuration information indicates that for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is K, or when the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported in multiple reference signal resources is K, the CSI reporting mode is a secondary reporting mode;

[0098] When the CSI reporting configuration information indicates that for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is at most K, or when the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported in multiple reference signal resources is at most K, the CSI reporting mode is the secondary reporting mode or the tertiary reporting mode.

[0099] In some embodiments, the CSI reporting method is a secondary reporting method. For the first-level CSI in the secondary reporting method, any one of the following conditions is met:

[0100] When the CSI reporting configuration information indicates that, for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is K, then, for each port type, the first-level CSI includes reference signal resource indications of the K reference signal resources corresponding to each port type;

[0101] In a case where the total number of reference signal resource indications to be reported among multiple reference signal resources indicated in the CSI reporting configuration information is K, the first-level CSI includes reference signal resource indications of the K reference signal resources;

[0102] When the CSI reporting configuration information indicates that, for each port type, the number of reference signal resources corresponding to each port type and the number of reference signal resource indications to be reported are both at most K, then, for each port type, the first-level CSI includes, for each port type, reference signal resource indications of R reference signal resources corresponding to each port type, where R is a positive integer greater than or equal to 1 and less than or equal to K.

[0103] When the CSI reporting configuration information indicates multiple reference signal resources and the total number of reference signal resource indications to be reported is at most K, the first-level CSI includes reference signal resource indications of R reference signal resources.

[0104] In some embodiments, when the CSI reporting configuration information indicates that, for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is at most K, or indicates that the total number of reference signal resource indications to be reported in multiple reference signal resources is at most K, for the first level CSI, based on information of the CSI at each level, sending the CSI to the network device includes:

[0105] Sending the first level CSI to the network device based on a bitmap, where the number of bits in the bitmap is determined based on the number of the plurality of reference signal resources;

[0106] and / or,

[0107] The first level CSI is sent to the network device based on a plurality of information fields, where the number of the plurality of information fields is determined based on the number of reference signal resource indications included in the CSI.

[0108] In some embodiments, the CSI reporting method is a three-level reporting method. For the first-level CSI and the second-level CSI in the three-level reporting method, any one of the following conditions is met:

[0109] When the CSI reporting configuration information indicates that, for a port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is at most K, then, for each port type, the first-level CSI includes the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type, and the second-level CSI includes reference signal resource indications of R reference signal resources corresponding to each port type, where R is a positive integer greater than or equal to 1 and less than or equal to K.

[0110] When the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported among multiple reference signal resources is at most K, the first-level CSI includes the total number of reference signal resource indications to be reported, and the second-level CSI includes the reference signal resource indications of R reference signal resources.

[0111] In some embodiments, the CSI reporting configuration information is further used to indicate a reporting rank indication, where:

[0112] When the CSI reporting mode is the secondary reporting mode, the first-level CSI also includes M rank indicators; M is a positive integer greater than or equal to 1 and less than or equal to K;

[0113] When the CSI reporting mode is a three-level reporting mode, the second-level CSI further includes M rank indicators.

[0114] In some embodiments, the processor is further configured to:

[0115] When the uplink resource allocated by the network device to the terminal is less than the uplink resource required for transmitting the CSI, determining the number of CSIs, where the number of CSIs is one or more;

[0116] Based on the number of CSIs, determine the target CSI in the CSIs;

[0117] In the target CSI, all or part of the information in the last level CSI is discarded;

[0118] Among them, when the CSI reporting mode is a two-level reporting mode, the last level CSI is the second-level CSI; when the CSI reporting mode is a three-level reporting mode, the last level CSI is the third-level CSI.

[0119] In some embodiments, determining a target CSI in the CSI based on the amount of CSI includes:

[0120] When the number of CSIs is one, the CSI is determined as the target CSI;

[0121] When there are multiple CSIs, the target CSI is determined among the multiple CSIs based on their priorities.

[0122] In some embodiments, in the target CSI, all or part of the information in the last level CSI is discarded, including:

[0123] determining a reference signal resource indication priority of each of the first number of reference signal resource indications included in the target CSI;

[0124] determining, based on the reference signal resource indication priority, a second number of target reference signal resource indications from the first number of reference signal resource indications, the second number being less than or equal to the first number;

[0125] Information corresponding to the second number of target reference signal resource indications in the last level of CSI is discarded.

[0126] In some embodiments, for each target reference signal resource indication, discarding information corresponding to a second number of target reference signal resource indications in the last level CSI includes:

[0127] Determine the bandwidth priority of wideband CSI, even subband CSI, and odd subband CSI, with the bandwidth priorities of wideband CSI, even subband CSI, and odd subband CSI decreasing in sequence; based on the bandwidth priority, discard all or part of the information corresponding to the target reference signal resource indication;

[0128] or,

[0129] Determine a PMI grouping priority corresponding to the target reference signal resource indication; and discard all or part of the information corresponding to the target reference signal resource indication based on the PMI grouping priority.

[0130] In a fourth aspect, the present disclosure provides a network device, including a memory, a transceiver, and a processor;

[0131] A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of a processor; and a processor for reading the computer program in the memory and performing the following operations:

[0132] Send CSI reporting configuration information to the terminal, where the CSI reporting configuration information is associated with multiple reference signal resources;

[0133] Based on the CSI reporting configuration information, CSI sent by the terminal is received, where the CSI includes a first number of reference signal resource indicators, and the first number is at least two.

[0134] In some embodiments, the CSI reporting configuration information is used to determine the CSI reporting mode and information of CSI at each level. Receiving CSI sent by the terminal based on the CSI reporting configuration information includes:

[0135] Based on the information of CSI at each level, the CSI sent by the terminal is received, wherein the CSI reporting method includes a secondary reporting method or a tertiary reporting method.

[0136] In some embodiments, the CSI reporting configuration information is used to indicate any of the following:

[0137] For each port type, the number of reference signal resource indicators to be reported in the reference signal resources corresponding to each port type is K;

[0138] The total number of reference signal resource indications to be reported among the multiple reference signal resources is K;

[0139] For each port type, the number of reference signal resource indicators to be reported in the reference signal resources corresponding to each port type is at most K;

[0140] The total number of reference signal resource indications to be reported among the multiple reference signal resources is at most K;

[0141] K is a positive integer greater than 1.

[0142] In some embodiments, when the CSI reporting configuration information indicates that for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is K, or when the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported in multiple reference signal resources is K, the CSI reporting mode is a secondary reporting mode;

[0143] When the CSI reporting configuration information indicates that for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is at most K, or when the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported in multiple reference signal resources is at most K, the CSI reporting mode is the secondary reporting mode or the tertiary reporting mode.

[0144] In some embodiments, the CSI reporting method is a secondary reporting method. For the first-level CSI in the secondary reporting method, any one of the following conditions is met:

[0145] When the CSI reporting configuration information indicates that, for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is K, then, for each port type, the first-level CSI includes reference signal resource indications of the K reference signal resources corresponding to each port type;

[0146] In a case where the total number of reference signal resource indications to be reported among multiple reference signal resources indicated in the CSI reporting configuration information is K, the first-level CSI includes reference signal resource indications of the K reference signal resources;

[0147] When the CSI reporting configuration information indicates that, for each port type, the number of reference signal resources corresponding to each port type and the number of reference signal resource indications to be reported are both at most K, then, for each port type, the first-level CSI includes, for each port type, reference signal resource indications of R reference signal resources corresponding to each port type, where R is a positive integer greater than or equal to 1 and less than or equal to K.

[0148] When the CSI reporting configuration information indicates multiple reference signal resources and the total number of reference signal resource indications to be reported is at most K, the first-level CSI includes reference signal resource indications of R reference signal resources.

[0149] In some embodiments, when the CSI reporting configuration information indicates that, for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is at most K, or indicates that the total number of reference signal resource indications to be reported in multiple reference signal resources is at most K, for the first level CSI, based on information of the CSI at each level, receiving the CSI sent by the terminal includes:

[0150] receiving, based on a bitmap, first-level CSI sent by the terminal, where the number of bits in the bitmap is determined based on the number of the plurality of reference signal resources;

[0151] and / or,

[0152] The first-level CSI sent by the terminal is received based on multiple information fields, where the number of the multiple information fields is determined based on the number of reference signal resource indicators included in the CSI.

[0153] In some embodiments, the CSI reporting method is a three-level reporting method. For the first-level CSI and the second-level CSI in the three-level reporting method, any one of the following conditions is met:

[0154] When the CSI reporting configuration information indicates that, for a port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is at most K, then, for each port type, the first-level CSI includes the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type, and the second-level CSI includes reference signal resource indications of R reference signal resources corresponding to each port type, where R is a positive integer greater than or equal to 1 and less than or equal to K.

[0155] When the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported among multiple reference signal resources is at most K, the first-level CSI includes the total number of reference signal resource indications to be reported, and the second-level CSI includes the reference signal resource indications of R reference signal resources.

[0156] In some embodiments, the CSI reporting configuration information is further used to indicate a reporting rank indication, where:

[0157] When the CSI reporting mode is the secondary reporting mode, the first-level CSI also includes M rank indicators; M is a positive integer greater than or equal to 1 and less than or equal to K;

[0158] When the CSI reporting mode is a three-level reporting mode, the second-level CSI further includes M rank indicators.

[0159] In a fifth aspect, the present disclosure provides a CSI reporting device, applied to a terminal, the device including:

[0160] A first receiving module is configured to receive CSI reporting configuration information sent by a network device, where the CSI reporting configuration information is associated with multiple reference signal resources;

[0161] a measurement module, configured to measure a plurality of reference signal resources and obtain measurement results of each of the plurality of reference signal resources, wherein the measurement results include a reference signal resource indication;

[0162] The first sending module is configured to send CSI to a network device based on CSI reporting configuration information and respective measurement results of a plurality of reference signal resources, where the CSI includes a first number of reference signal resource indications, and the first number is at least two.

[0163] In a sixth aspect, the present disclosure provides a CSI reporting device, applied to a network device, the device comprising:

[0164] A second sending module is configured to send CSI reporting configuration information to the terminal, where the CSI reporting configuration information is associated with multiple reference signal resources;

[0165] The second receiving module is configured to receive CSI sent by the terminal based on the CSI reporting configuration information, where the CSI includes a first number of reference signal resource indications, where the first number is at least two.

[0166] In a seventh aspect, the present disclosure provides a processor-readable storage medium, wherein the processor-readable storage medium stores a computer program, wherein the computer program is used to cause a computer to execute the CSI reporting method described in any one of the first aspects, or the computer program is used to cause a computer to execute the CSI reporting method described in any one of the second aspects.

[0167] The present disclosure provides a CSI reporting method, device, and apparatus. The terminal receives CSI reporting configuration information sent by a network device. The CSI reporting configuration information is associated with multiple reference signal resources. After measuring the multiple reference signal resources, the terminal obtains measurement results of each of the multiple reference signal resources. The measurement results include reference signal resource indications. The terminal then sends CSI to the network device based on the CSI reporting configuration information and the measurement results of each of the multiple reference signal resources. The CSI includes a first number of reference signal resource indications, and the first number is at least two. Since the network device associates multiple reference signal resources through the CSI reporting configuration information, the terminal can measure multiple reference signal resources at one time, and then report at least two reference signal resource indications in one CSI feedback, so that the network device can obtain the channel characteristics of the analog beams corresponding to the at least two reference signal resource indications, flexibly realize multi-terminal paired transmission under multiple analog beams, and improve the flexibility of the CSI feedback method. BRIEF DESCRIPTION OF THE DRAWINGS

[0168] In order to more clearly illustrate the technical solutions in the present disclosure or related technologies, a brief introduction will be given below to the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0169] FIG1 is a flowchart of a CSI reporting method provided by an embodiment of the present disclosure;

[0170] FIG2 is a flowchart of a terminal reporting CSI based on CSI reporting configuration information and measurement results provided by an embodiment of the present disclosure;

[0171] FIG3 is a flowchart of discarding part of the CSI information provided by an embodiment of the present disclosure;

[0172] FIG4 is a schematic structural diagram of a terminal provided by an embodiment of the present disclosure;

[0173] FIG5 is a schematic diagram of the structure of a network device provided by an embodiment of the present disclosure;

[0174] FIG6 is a first structural diagram of a CSI reporting device provided in an embodiment of the present disclosure;

[0175] FIG7 is a second structural diagram of the CSI reporting device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0176] To make the objectives, technical solutions, and advantages of this disclosure more clear, the technical solutions of this disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of this disclosure, not all of them. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of this disclosure without creative effort shall fall within the scope of protection of this disclosure.

[0177] To avoid introducing multiple types and subtypes of feedback configurations, NR adopts a unified CSI feedback framework that can support different application scenarios. The CSI feedback framework decouples CSI measurement and CSI reporting and enables flexible Channel State Information-Reference Signal (CSI-RS) configuration and CSI reporting configuration.

[0178] Current CSI feedback methods only provide one simulated beam and its corresponding channel characteristics per feedback. Even with multiple feedback loops, it's possible that the channel characteristics corresponding to the same simulated beam will be fed back each time. Multiple feedback loops also result in significant feedback delays, rendering previously fed CSI ineffective.

[0179] Based on this, an embodiment of the present disclosure provides a CSI reporting method that feeds back the channel characteristics corresponding to multiple simulated beams during a CSI reporting process, thereby improving the flexibility of CSI reporting. The solution of the embodiment of the present disclosure will be described below with reference to the accompanying drawings.

[0180] FIG1 is a flowchart of a CSI reporting method provided by an embodiment of the present disclosure. The method is applied to a terminal. As shown in FIG1 , the method includes:

[0181] S11: Receive CSI reporting configuration information sent by a network device, where the CSI reporting configuration information is associated with multiple reference signal resources.

[0182] The network device sends CSI reporting configuration information to the terminal. The CSI reporting configuration information is used to indicate the terminal's CSI reporting. Specifically, the CSI reporting configuration information may include the configured reporting amount, the number of reporting amounts, the granularity of the reporting frequency, the reporting period, the reported uplink resources, and so on. The reporting amount indicates the reference signal resources reported by the terminal in the CSI, the number of reporting amounts indicates the number of reference signal resources reported in the CSI, the granularity of the reporting frequency indicates whether the terminal is configured for subband reporting or wideband reporting, the reporting period indicates the period of CSI reporting by the terminal, and the reported uplink resources indicate the uplink resources used by the terminal during CSI reporting.

[0183] The CSI reporting configuration information is associated with multiple reference signal resources. These multiple reference signal resources may include CSI-RS signal resources or synchronization signal block (SS / PBCH Block, SSB) signal resources, which is not limited in the embodiments of the present disclosure.

[0184] S12: Measure multiple reference signal resources to obtain measurement results of each of the multiple reference signal resources, where the measurement results include a reference signal resource indication.

[0185] The multiple reference signal resources associated with the CSI reporting configuration information are the reference signal resources to be measured by the terminal. After receiving the CSI reporting configuration information, the terminal can obtain the multiple reference signal resources associated with the CSI reporting configuration information, measure the multiple reference signal resources, and obtain measurement results for each of the multiple reference signal resources.

[0186] For the measurement result of any reference signal resource, the measurement result includes the reference signal resource indication of the reference signal resource, and may also include the rank indication (RI), channel quality indication (CQI), precoding matrix indication (PMI), etc. of the reference signal resource.

[0187] The reference signal resource indication represents the index of the corresponding reference signal resource, which is used to uniquely identify the reference signal resource. The reference signal resource indication may include a CSI-RS resource indication (CSI-RS Resource Indicator, CRI) or an SSB resource indication (SSBRI). Specifically, when the reference signal resource is a CSI-RS resource, the corresponding reference signal resource indication is a CRI; when the reference signal resource is an SSB resource, the corresponding reference signal resource indication is an SSBRI.

[0188] S13: Send CSI to the network device based on the CSI reporting configuration information and the measurement results of each of the multiple reference signal resources, where the CSI includes a first number of reference signal resource indications, and the first number is at least two.

[0189] In addition to associating multiple reference signal resources, the CSI reporting configuration information also indicates the measurement quantity reported by the terminal and the reporting method. After obtaining the measurement results of each of the multiple reference signal resources, the terminal determines reference signal resources that meet the requirements among the multiple reference signal resources and reports reference signal resource indicators for a first number of these reference signal resources in the CSI. The CSI then includes the first number of reference signal resource indicators, where the first number is at least two.

[0190] Optionally, the CSI may further include other measurement quantities of the first number of reference signal resources, for example, RI, CQI, PMI, etc., which is not limited in this embodiment of the present disclosure.

[0191] The CSI reporting method provided by the embodiment of the present disclosure is that the terminal receives CSI reporting configuration information sent by the network device, and the CSI reporting configuration information is associated with multiple reference signal resources. After measuring the multiple reference signal resources, the terminal obtains the measurement results of each of the multiple reference signal resources, and the measurement results include reference signal resource indications. Then, based on the CSI reporting configuration information and the measurement results of each of the multiple reference signal resources, the terminal sends CSI to the network device, and the CSI includes a first number of reference signal resource indications, and the first number is at least two. Since the network device associates multiple reference signal resources through the CSI reporting configuration information, the terminal can measure multiple reference signal resources at one time, and then report at least two reference signal resource indications in one CSI feedback, so that the network device can obtain the channel characteristics of the analog beams corresponding to the at least two reference signal resource indications, flexibly realize multi-terminal paired transmission under multiple analog beams, and improve the flexibility of the CSI feedback method.

[0192] The following describes an implementation scheme for a terminal to report CSI based on CSI reporting configuration information and respective measurement results of multiple reference signal resources with reference to FIG2 .

[0193] FIG2 is a flowchart of a terminal reporting CSI based on CSI reporting configuration information and measurement results according to an embodiment of the present disclosure. As shown in FIG2 , the flowchart includes:

[0194] S21. Determine a CSI reporting mode based on the CSI reporting configuration information. The CSI reporting mode includes a secondary reporting mode or a tertiary reporting mode.

[0195] The network device may configure a CSI reporting mode for the terminal through CSI reporting configuration information. In the embodiment of the present disclosure, the CSI reporting mode includes a secondary reporting mode or a tertiary reporting mode.

[0196] The secondary reporting method refers to reporting CSI to network devices using both Level 1 and Level 2 CSI. The Level 1 and Level 2 CSI contain different information. The information included in the Level 1 and Level 2 CSI together constitutes the information related to the reference signal resources to be reported. The information included in the Level 1 CSI is more important than the information included in the Level 2 CSI. Accordingly, the reporting priority of the Level 1 CSI is higher than that of the Level 2 CSI.

[0197] Based on the information included in the first-level CSI, the information included in the second-level CSI can be determined, and thus the size of the second-level CSI and the required resource overhead can be determined. For example, the first-level CSI may include a reference signal resource indicator (RSRI) and an RI. The RSRI indicates the reference signal resources. Based on the RSRI, the number of reference signal resources to be reported can be determined. The RI indicates the number of streams per reference signal resource. Based on the RSRI and RI, the information included in the second-level CSI, the size of the second-level CSI, and the resource overhead can be determined.

[0198] Optionally, after reporting the first level CSI, if it is determined based on the resource overhead required for the second level CSI that the uplink resources allocated by the network device to the terminal are insufficient to complete the CSI reporting, the information in the second level CSI may be selectively discarded.

[0199] The three-level reporting method refers to the method of reporting CSI to the network device through the first-level CSI, second-level CSI, and third-level CSI. The first-level CSI, second-level CSI, and third-level CSI include different information. The information included in the first-level CSI, second-level CSI, and third-level CSI together constitute the relevant information of the reference signal resources to be reported. The importance of the information included in the first-level CSI, the importance of the information included in the second-level CSI, and the importance of the information included in the third-level CSI decrease in descending order. Correspondingly, the reporting priority of the first-level CSI, the second-level CSI, and the third-level CSI decreases in descending order.

[0200] Based on the information included in the first-level CSI and the second-level CSI, the information included in the third-level CSI can be determined, and the size of the third-level CSI and the required resource overhead can be determined. Optionally, after reporting the first-level CSI and the second-level CSI, if it is determined based on the resource overhead required for the third-level CSI that the uplink resources allocated by the network device to the terminal are insufficient to complete the CSI reporting, the information in the third-level CSI can be selectively discarded.

[0201] In the embodiment of the present disclosure, the CSI reporting configuration information may include a parameter K, where K is a positive integer greater than 1. Therefore, the CSI reporting configuration information is used to indicate any one of the following 1.1 to 1.4:

[0202] 1.1. For each port type, the number of reference signal resource indicators to be reported in the reference signal resources corresponding to the port type is K.

[0203] In an embodiment of the present disclosure, CSI reporting configuration information is associated with multiple reference signal resources, each of which has its own port type, where the port type indicates the number of ports of the corresponding reference signal resource. The number of ports of a reference signal resource can be, for example, 8, 16, and so on. The port types of the multiple reference signal resources can be the same or different. Taking the example of x port types involved in the multiple reference signal resources associated with the CSI reporting configuration information, and the port type of any reference signal resource belonging to one of the x port types, item 1.1 indicates that, for each of the x port types, the CSI reporting configuration information is used to indicate that K reference signal resource indications need to be reported in the reference signal resource corresponding to the port type, and these K reference signal resource indications are used to indicate K reference signal resources of the port type.

[0204] 1.2. Among the multiple reference signal resources, the total number of reference signal resource indicators to be reported is K.

[0205] Item 1.2 indicates that, for multiple reference signal resources associated with the CSI reporting configuration information, the CSI reporting configuration information is used to indicate a total of K reference signal resource indications to be reported, and these K reference signal resource indications are used to indicate K reference signal resources among the multiple reference signal resources.

[0206] The difference between item 1.2 and item 1.1 is that item 1.1 is the CSI reporting configuration information that indicates the reference signal resource indications to be reported based on the port type dimension. If the port types involved in multiple reference signal resources include x, the total number of reference signal resource indications to be reported is x*K; item 1.2 indicates the total number of reference signal resource indications to be reported through CSI reporting configuration information. Regardless of the number of port types involved in multiple reference signal resources, the total number of reference signal resource indications to be reported is K.

[0207] 1.3. For each port type, the number of reference signal resource indicators to be reported in the reference signal resources corresponding to the port type is at most K.

[0208] Taking the case where the number of port types involved in the multiple reference signal resources associated with the CSI reporting configuration information includes x as an example, the port type of any reference signal resource belongs to one of the x port types. Then, item 1.3 indicates that, for each of the x port types, the CSI reporting configuration information is used to indicate that a maximum of K reference signal resource indications need to be reported in the reference signal resource corresponding to the port type, and these maximum K reference signal resource indications are used to indicate a maximum of K reference signal resources of the port type.

[0209] 1.4. Among the multiple reference signal resources, the total number of reference signal resource indicators to be reported is at most K.

[0210] Item 1.4 indicates that, for multiple reference signal resources associated with the CSI reporting configuration information, the CSI reporting configuration information is used to indicate that a total of at most K reference signal resource indications are reported, and each reference signal resource indication corresponds to one reference signal resource.

[0211] The difference between item 1.4 and item 1.3 is that item 1.3 is the CSI reporting configuration information that indicates the reference signal resource indications to be reported based on the port type dimension. If the port types involved in multiple reference signal resources include x, and the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is R (R is less than or equal to K), then the total number of reference signal resource indications to be reported is x*R; item 1.4 indicates through CSI reporting configuration information that the total number of reference signal resource indications to be reported is at most K. Regardless of the number of port types involved in multiple reference signal resources, the total number of reference signal resource indications to be reported is R.

[0212] Based on the above items 1.1 to 1.4, the CSI reporting method can be determined.

[0213] Optionally, for the above items 1.1 and 1.2, that is, when the CSI reporting configuration information indicates that for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is K, or when the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported in multiple reference signal resources is K, the CSI reporting method is a secondary reporting method.

[0214] Optionally, for the above items 1.3 and 1.4, that is, when the CSI reporting configuration information indicates that for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is at most K, or when the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported in multiple reference signal resources is at most K, the CSI reporting method is a secondary reporting method or a tertiary reporting method.

[0215] S22 : Based on the CSI reporting configuration information and the CSI reporting mode, determine information of CSI at each level from the measurement results of the plurality of reference signal resources.

[0216] Typically, CSI reporting configuration information can configure reporting quantities for terminals, including, for example, reference signal resource indication (RSRI), RI, PMI, CQI, and so on. The RSRI indicates the corresponding reference signal resource. RI represents the number of streams for each reference signal resource and also indicates the number of transport blocks corresponding to the reference signal resource. If the RI is greater than 4, the reference signal resource corresponds to two transport blocks. If the RI is less than or equal to 4, the reference signal resource corresponds to one transport block. The transport block is used for subsequent data transmission between the terminal and the network device.

[0217] The CSI reporting configuration information also configures the reporting frequency granularity, that is, whether the terminal reports wideband or subband. If wideband reporting is configured, a single wideband CQI is reported for the entire system bandwidth. If subband reporting is configured, the terminal reports a single wideband CQI for the entire system bandwidth, in addition to a subband CQI for each subband.

[0218] The CSI reporting configuration information may also configure corresponding codebook information for the terminal, such as a Type I codebook or a Type II codebook, and the reported PMI may be determined through the codebook information.

[0219] CSI reporting methods include secondary reporting and tertiary reporting. The following describes how to determine CSI information at each level based on these two different CSI reporting methods and CSI reporting configuration information.

[0220] In the case where the CSI reporting mode is a two-level reporting mode, the CSI includes first-level CSI and second-level CSI. The following describes the information included in the first-level CSI and the second-level CSI in different situations.

[0221] In the two-level reporting method, the information included in the first-level CSI is more important than the information included in the second-level CSI. The first-level CSI generally includes fixed overhead information, while the second-level CSI generally includes non-fixed overhead information. In the embodiments of the present disclosure, fixed overhead refers to the required uplink resources being known, while non-fixed overhead refers to the required uplink resources being uncertain.

[0222] For the secondary reporting method, the fixed overhead information may include, for example, the reference signal resource indication and RI, and the non-fixed overhead information may include, for example, the PMI and CQI; or, the fixed overhead information may include, for example, the reference signal resource indication, RI, the broadband part of the PMI and the broadband part of the CQI, and the non-fixed overhead information may include, for example, the subband part of the PMI and the subband part of the CQI; or, the fixed overhead information may include, for example, the reference signal resource indication, RI, part of the PMI information and part of the CQI information, and the non-fixed overhead information may include, for example, another part of the PMI information and another part of the CQI information.

[0223] Among them, when the configured codebook information is Type I codebook, the wideband part of CQI and PMI belongs to the information in the first-level CSI, and the subband part of CQI and PMI belongs to the information in the second-level CSI; when the configured codebook information is Type II codebook, part of the CQI and PMI information belongs to the information in the first-level CSI, and the other part of the CQI and PMI information belongs to the information in the second-level CSI.

[0224] Correspondingly, for the secondary reporting method, the first-level CSI may include a reference signal resource indication and RI, and the second-level CSI may include a PMI and a CQI; or, the first-level CSI may include a reference signal resource indication, RI, a wideband part of the PMI, and a wideband part of the CQI, and the second-level CSI may include a subband part of the PMI and a subband part of the CQI; or, the first-level CSI may include a reference signal resource indication, RI, part of the PMI information, and part of the CQI information, and the second-level CSI may include another part of the PMI information and another part of the CQI information.

[0225] The following describes the information included in the first-level CSI and the second-level CSI in the secondary reporting mode with reference to specific examples.

[0226] 2.1. When the CSI reporting configuration information indicates that, for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is K, the terminal adopts a two-level reporting method, wherein, for each port type, the first-level CSI includes reference signal resource indications of the K reference signal resources corresponding to the port type.

[0227] In one possible implementation, the CSI reporting configuration information is also used to indicate reporting of RI. In the case where the CSI reporting mode is a secondary reporting mode, the first-level CSI may include, in addition to the reference signal resource indications of K reference signal resources corresponding to each port type, M RIs, where M is a positive integer greater than or equal to 1 and less than or equal to K.

[0228] Taking a case where multiple reference signal resources include a total of n port types as an example, optionally, the first-level CSI includes reference signal resource indications of K reference signal resources corresponding to each port type (i.e., reference signal resource indications of n*K reference signal resources) and M RIs, and the second-level CSI may include the PMI and CQI corresponding to each of the reference signal resource indications of these n*K reference signal resources;

[0229] Optionally, the first-level CSI includes the reference signal resource indications of the n*K reference signal resources, M RIs, and the wideband part of the PMI and the wideband part of the CQI corresponding to each of the reference signal resource indications of the n*K reference signal resources. The second-level CSI may include the subband part of the PMI and the subband part of the CQI corresponding to each of the reference signal resource indications of the n*K reference signal resources.

[0230] Optionally, the first-level CSI may include the reference signal resource indications of the n*K reference signal resources, M RIs, partial information of the PMI corresponding to the reference signal resource indications of the n*K reference signal resources, and partial information of the CQI, and the second-level CSI may include another part of the PMI information corresponding to the reference signal resource indications of the n*K reference signal resources and another part of the CQI information.

[0231] The following example A is used to illustrate the implementation of item 2.1.

[0232] Example A:

[0233] The network device configures the terminal to report CSI. The multiple reference signal resources associated with the CSI reporting configuration information include four 16-port CSI-RS resources and four 8-port CSI-RS resources, corresponding to the first through eighth CSI-RS resources, respectively. Different CSI-RS resources implicitly correspond to different simulated beams. The network device uses the CSI reporting configuration information to configure the terminal's reporting parameters, including CRI, RI, PMI, and CQI. PMI uses the Rel-16 Type II codebook and is configured for subband CQI feedback.

[0234] The CSI reporting configuration information further indicates that for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is K=2. Based on this, it can be determined that the CSI reporting method is a secondary reporting method. Since the multiple reference signal resources are all CSI-RS resources, the corresponding reference signal resource indication is CRI. Since the port types involved in the multiple reference signal resources include 16-port and 8-port port types, the number of reference signal resource indications to be reported in the reference signal resources of each port type is K=2, that is, the CSI-RS resource for 16 ports needs to report 2 CRIs, and the CSI-RS resource for 8 ports needs to report 2 CRIs.

[0235] After receiving the CSI reporting configuration information, the terminal measures the four 16-port CSI-RS resources and the four 8-port CSI-RS resources respectively. One implementation method is that the terminal measures the Reference Signal Receiving Power (RSRP) of each of the four 16-port CSI-RS resources, sorts them according to the measurement results, and determines the two 16-port CSI-RS resources with the largest RSRP. Assuming they are the first and second CSI-RS resources, the corresponding resource indexes are CRI1 and CRI2. Similarly, the terminal measures the RSRP of each of the four 8-port resources, sorts them according to the measurement results, and determines the two 8-port CSI-RS resources with the largest RSRP. Assuming they are the sixth and eighth CSI-RS resources, the corresponding resource indexes are CRI6 and CRI8.

[0236] Furthermore, the terminal calculates the RI, PMI and CQI of each of the four determined CSI-RS resources. According to the CSI reporting configuration information, subband reporting is adopted, assuming that there are 8 subbands in total. Since the maximum number of streams (rank) of the Rel-16 TypeII codebook is 2, the value of RI is less than or equal to 4. As mentioned above, when the value of RI is less than or equal to 4, the reference signal resource corresponds to one transport block, and when the value of RI is greater than 4, the reference signal resource corresponds to two transport blocks. When the CSI reporting configuration information is configured as subband CQI feedback, the terminal reports a wideband CQI for the entire system bandwidth. In addition, the terminal also reports a subband CQI for each subband. Therefore, in this example, each CSI-RS resource corresponds to a transport block, and its CQI includes 1 wideband CQI and 8 subband CQIs. Using the corresponding CSI calculation method, the information included in the first-level CSI and the information included in the second-level CSI can be obtained.

[0237] The information included in the first-level CSI can be found in Table 1 below:

[0238] Table 1

[0239] As shown in Table 1, for each port type, the first-level CSI includes reference signal resource indicators (CRIs) for the K reference signal resources corresponding to that port type. For a 16-port port type, the first-level CSI includes two CRIs corresponding to each of the 16 ports, namely, CRI1 and CRI2 in Table 1. For an 8-port port type, the first-level CSI includes two CRIs corresponding to each of the 8 ports, namely, CRI6 and CRI8 in Table 1. Furthermore, the first-level CSI also includes M RIs, namely, RI1, RI2, RI6, and RI8. Optionally, each CRI uses 3-bit feedback, and each RI uses 1-bit feedback.

[0240] Further, referring to Table 1, the first-level CSI also includes the wideband CQI and 8 subband CQIs of transport block 1 corresponding to each CRI, as well as the wideband parameters of the PMI corresponding to each CRI. The wideband parameters of the PMI represent the total number of non-zero coefficients in all layers.

[0241] The information included in the second-level CSI can be found in Table 2 below:

[0242] Table 2

[0243] The second-level CSI includes non-fixed overhead information, as shown in Table 2. In Example A, the non-fixed overhead information includes the PMI corresponding to the reference signal resource indicator. For each port type, the second-level CSI includes the PMIs corresponding to the K reference signal resources corresponding to that port type. The PMIs are grouped into Group 0, Group 1, and Group 2. As shown in Table 1, the K reference signal resources corresponding to each port type include CRI1 and CRI2 for 16 ports, and CRI6 and CRI8 for 8 ports. Therefore, the second-level CSI includes the following information: PMI Group 0, PMI Group 1, and PMI Group 2 for CRI1; PMI Group 0, PMI Group 1, and PMI Group 2 for CRI2; PMI Group 0, PMI Group 1, and PMI Group 2 for CRI6; and PMI Group 0, PMI Group 1, and PMI Group 2 for CRI8. In each embodiment of the present disclosure, group 0 includes spatial basis vector indication, rotation factor and the strongest coefficient indication (Strongest Coefficient Indicator, SCI) of each layer; group 1 includes frequency domain basis vector indication, initial value indication of the intermediate basis vector set, reference amplitude, high priority non-zero coefficient and non-zero coefficient position indication corresponding to the high priority non-zero coefficient; group 2 includes low priority non-zero coefficient and non-zero coefficient position indication corresponding to the low priority.

[0244] If the uplink resources allocated by the network device to the terminal, such as the size of the physical uplink shared channel (PUSCH) resources, are sufficient, the terminal directly feeds back the CSI to the network device.

[0245] After receiving the CSI, the network device obtains the channel information corresponding to analog beams 1, 2, 6, and 8. Furthermore, based on the CSI feedback from other terminals, multi-user (MU) scheduling can be performed on terminals that report the same analog beam. For example, if another terminal reports analog beam 2, the network device can use analog beam 2 to transmit for both terminals simultaneously.

[0246] 2.2. When the CSI reporting configuration information indicates multiple reference signal resources and the total number of reference signal resource indications to be reported is K, the terminal adopts a two-level reporting method, wherein the first-level CSI includes reference signal resource indications of K reference signal resources.

[0247] In one possible implementation, the CSI reporting configuration information is also used to indicate the reporting of RI. In the case where the CSI reporting method is a secondary reporting method, the first-level CSI may include, in addition to the reference signal resource indication of K reference signal resources, M RIs, where M is a positive integer greater than or equal to 1 and less than or equal to K.

[0248] Regardless of the number of port types of the multiple reference signal resources associated with the CSI reporting configuration information, optionally, the first-level CSI includes reference signal resource indicators of K reference signal resources and M RIs, and the second-level CSI includes the PMIs and CQIs corresponding to the reference signal resource indicators of the K reference signal resources.

[0249] Optionally, the first-level CSI includes reference signal resource indicators of the K reference signal resources, M RIs, and the wideband part of the PMI and the wideband part of the CQI corresponding to each of the reference signal resource indicators of the K reference signal resources; the second-level CSI may include the subband part of the PMI and the subband part of the CQI corresponding to each of the reference signal resource indicators of the K reference signal resources;

[0250] Optionally, the first-level CSI may include reference signal resource indications of the K reference signal resources, M RIs, partial information of the PMI corresponding to the reference signal resource indications of the K reference signal resources, and partial information of the CQI, and the second-level CSI may include another partial information of the PMI corresponding to the reference signal resource indications of the K reference signal resources and another partial information of the CQI.

[0251] The following examples B and C are used to illustrate the implementation of item 2.2.

[0252] Example B:

[0253] The network device configures the terminal to perform CSI reporting. The multiple reference signal resources associated with the CSI reporting configuration information include 8 16-port CSI-RS resources. Different CSI-RS resources here imply corresponding to different analog beams. The network device configures the terminal's reporting quantities including CRI, RI, PMI and CQI through the CSI reporting configuration information. Among them, PMI adopts the Rel-15 Type I (Type I) codebook and is configured for subband reporting. Further, the CSI reporting configuration information indicates the number K=4 of reference signal resource indications to be reported among the multiple reference signal resources. Since the multiple reference signal resources are all CSI-RS resources, the corresponding reference signal resource indication is CRI. That is, a total of 4 CRIs need to be reported. Based on this, it can be determined that the CSI reporting method is a secondary reporting method.

[0254] After receiving the CSI reporting configuration information, the terminal measures the eight 16-port CSI-RS resources. One implementation method is to measure the RSRP of each of the eight 16-port CSI-RS resources and sort them according to the results. The K = 4 CSI-RS resources with the largest RSRP values ​​are determined, and the resource indexes of these K = 4 CSI-RS resources, i.e., the corresponding four CRIs, are obtained. Assuming that the K = 4 results measured by the terminal are the first CSI-RS resource, the third CSI-RS resource, the fifth CSI-RS resource, and the seventh CSI-RS resource, the corresponding resource indexes are represented as CRI1, CRI3, CRI5, and CRI7.

[0255] Furthermore, the terminal calculates the RI, PMI, and CQI for each of the K=4 CSI-RS resources. According to the CSI reporting configuration information, subband reporting is adopted, assuming that there are 8 subbands in total. In this way, the 16-port PMI of each CSI-RS resource includes a wideband PMI and 8 subband PMIs. If the RI value is less than or equal to 4, each CSI-RS resource corresponds to one transport block, and its CQI includes 1 wideband CQI and 8 subband CQIs. If the RI value is greater than 4, each CSI-RS resource corresponds to two transport blocks, and each transport block corresponds to 1 wideband CQI and 8 subband CQIs. Taking the case where the RI value is greater than 4 as an example, the corresponding CSI calculation method is used to obtain the information included in the first-level CSI and the information included in the second-level CSI.

[0256] The information included in the first-level CSI can be found in Table 3 below:

[0257] Table 3

[0258] Please refer to Table 3. The first-level CSI includes reference signal resource indicators of K reference signal resources, namely CRI1, CRI3, CRI5 and CRI7. Furthermore, the first-level CSI also includes M RIs, namely RI1, RI3, RI5 and RI7. Optionally, each CRI uses 3-bit feedback and each RI uses 1-bit feedback. Since RI is greater than 4, each CSI-RS resource corresponds to two transport blocks. Further, please refer to Table 3. The first-level CSI also includes the wideband CQI and 8 subband CQIs of transport block 1 corresponding to each CRI, namely the wideband CQI and 8 subband CQIs of transport block 1 corresponding to CRI1, the wideband CQI and 8 subband CQIs of transport block 1 corresponding to CRI3, the wideband CQI and 8 subband CQIs of transport block 1 corresponding to CRI5, and the wideband CQI and 8 subband CQIs of transport block 1 corresponding to CRI7.

[0259] The information included in the second-level CSI can be found in Table 4 below:

[0260] Table 4

[0261] Please refer to Table 4. The reference signal resource indications of K reference signal resources are determined by the first-level CSI. The second-level CSI includes the wideband PMI and even subband PMI corresponding to the reference signal resource indications of these K reference signal resources, and the wideband CQI, odd subband CQI and even subband CQI of transport block 2 corresponding to the reference signal resource indications of these K reference signal resources.

[0262] If the uplink resources allocated by the network device to the terminal, such as the PUSCH resource size, are sufficient, the terminal directly feeds back the CSI to the network device.

[0263] After receiving the CSI, the network device obtains the channel information corresponding to analog beams 1, 3, 5, and 7. Further, based on the CSI feedback from other terminals, the terminals that feedback the same analog beam can be scheduled for MU.

[0264] Example C:

[0265] The network device configures the terminal to report CSI. The multiple reference signal resources associated with the CSI reporting configuration information include four 16-port CSI-RS resources and four 8-port CSI-RS resources. Different CSI-RS resources here imply corresponding to different analog beams. The network device configures the terminal's reporting quantities including CRI, RI, PMI, and CQI through the CSI reporting configuration information. Among them, PMI uses the Rel-15Type I codebook and is configured for broadband reporting. The CSI reporting configuration information further indicates the number K=4 reference signal resource indications to be reported among the multiple reference signal resources. Since the multiple reference signal resources are all CSI-RS resources, the corresponding reference signal resource indication is CRI. That is, a total of four CRIs need to be reported. Based on this, it can be determined that the CSI reporting method is a secondary reporting method.

[0266] After receiving the CSI reporting configuration information, the terminal measures the eight 16-port CSI-RS resources. One implementation method is to measure the RSRP of each of the eight 16-port CSI-RS resources and sort them based on the results. The K = 4 CSI-RS resources with the largest RSRP values ​​are determined, and the resource indexes of these K = 4 CSI-RS resources are obtained. Assuming that the K = 4 results measured by the terminal are the first CSI-RS resource, the third CSI-RS resource, the fifth CSI-RS resource, and the seventh CSI-RS resource, the corresponding resource indexes are represented as CRI1, CRI3, CRI5, and CRI7.

[0267] Furthermore, the terminal calculates the RI, PMI, and CQI for each of the K = 4 CSI-RS resources. Based on the CSI reporting configuration information, wideband reporting is used. Thus, each CSI-RS resource contains only the wideband PMI. If the RI value is less than or equal to 4, each CSI-RS resource corresponds to one transport block, and its CQI contains one wideband PMI. If the RI value is greater than 4, each CSI-RS resource corresponds to two transport blocks, and each transport block corresponds to one wideband CQI. Taking the case where all RI values ​​are greater than 4 as an example, the corresponding CSI calculation method is used to obtain the information included in the first-level CSI and the information included in the second-level CSI.

[0268] The information included in the first-level CSI can be found in Table 5 below:

[0269] Table 5

[0270] Please refer to Table 5, which illustrates a case where the first-level CSI only includes reference signal resource indications of K reference signal resources, namely CRI1, CRI3, CRI5 and CRI7. Optionally, each CRI uses 3-bit feedback.

[0271] The information included in the second-level CSI can be found in Table 6 below:

[0272] Table 6

[0273] Please refer to Table 6, which illustrates a situation in which the second-level CSI includes the RI corresponding to each of the reference signal resource indications of K reference signal resources, the wideband PMI corresponding to each of the reference signal resource indications of K reference signal resources, the wideband CQI of the transport block 1 corresponding to the reference signal resource indications of the K reference signal resources, and the wideband CQI of the transport block 2 corresponding to the reference signal resource indications of the K reference signal resources.

[0274] If the uplink resources allocated by the network device to the terminal, such as the PUSCH resource size, are sufficient, the terminal directly feeds back the CSI to the network device.

[0275] After receiving the CSI, the network device obtains the channel information corresponding to analog beams 1, 3, 5, and 7. Further, based on the CSI feedback from other terminals, the terminals that feedback the same analog beam can be scheduled for MU.

[0276] 2.3. When the CSI reporting configuration information indicates that for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is at most K, the terminal adopts a two-level reporting method, wherein, for each port type, the first-level CSI includes reference signal resource indications of R reference signal resources corresponding to the port type, where R is a positive integer greater than or equal to 1 and less than or equal to K.

[0277] In one possible implementation, the CSI reporting configuration information is also used to indicate reporting of RI. In the case where the CSI reporting mode is a secondary reporting mode, the first-level CSI may include, in addition to the reference signal resource indication of up to K reference signal resources corresponding to each port type, M RIs, where M is a positive integer greater than or equal to 1 and less than or equal to K.

[0278] Optionally, for item 2.3, that is, when the CSI reporting configuration information indicates that the number of reference signal resource indications to be reported in each port type is at most K, for the first-level CSI, based on information of the CSI at each level, sending CSI to the network device includes:

[0279] Sending the first level CSI to the network device based on a bitmap, where the number of bits in the bitmap is determined based on the number of the plurality of reference signal resources;

[0280] and / or,

[0281] The first level CSI is sent to the network device based on a plurality of information fields, where the number of the plurality of information fields is determined based on the number of reference signal resource indications included in the CSI.

[0282] Taking a case where multiple reference signal resources include a total of n port types as an example, optionally, the first-level CSI includes reference signal resource indications of R reference signal resources corresponding to each port type (i.e., reference signal resource indications of n*R reference signal resources) and M RIs, and the second-level CSI may include the PMI and CQI corresponding to each of the reference signal resource indications of these n*R reference signal resources;

[0283] Optionally, the first-level CSI includes the reference signal resource indications of the n*R reference signal resources, the M RIs, and the wideband part of the PMI and the wideband part of the CQI corresponding to each of the reference signal resource indications of the n*R reference signal resources. The second-level CSI may include the subband part of the PMI and the subband part of the CQI corresponding to each of the reference signal resource indications of the n*R reference signal resources.

[0284] Optionally, the first-level CSI may include the reference signal resource indications of the n*R reference signal resources, M RIs, partial information of the PMI corresponding to each of the reference signal resource indications of the n*R reference signal resources, and partial information of the CQI, and the second-level CSI may include another partial information of the PMI corresponding to each of the reference signal resource indications of the n*R reference signal resources and another partial information of the CQI.

[0285] The following example D is used to illustrate the implementation of item 2.3.

[0286] Example D:

[0287] The network device configures the terminal to perform CSI reporting. The multiple reference signal resources associated with the CSI reporting configuration information include 4 16-port CSI-RS resources and 4 8-port CSI-RS resources, corresponding to the 1st CSI-RS resource to the 8th CSI-RS resource respectively. Different CSI-RS resources here imply different analog beams. The network device configures the terminal's reporting quantities including CRI, RI, PMI and CQI through the CSI reporting configuration information. Among them, PMI adopts the Rel-16 Type II codebook and is configured as subband CQI feedback. Further, the CSI reporting configuration information indicates that for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is at most K, and K=2. Based on this, it can be determined that the CSI reporting method is a secondary reporting method or a tertiary reporting method. In Example D, the CSI reporting method is introduced as a secondary reporting method.

[0288] Since multiple reference signal resources are CSI-RS resources, the corresponding reference signal resource indicators are CRIs. Since the multiple reference signal resources involve two port types, 16-port and 8-port, the number of reference signal resource indicators to be reported for each port type is at most K. That is, a maximum of two CRIs are reported for a 16-port CSI-RS resource, and a maximum of two CRIs are reported for an 8-port CSI-RS resource. CSI reporting is a two-level reporting method.

[0289] After receiving the CSI reporting configuration information, the terminal measures the RSRP of each of the four 16-port CSI-RS resources and the four 8-port CSI-RS resources. Based on the RSRP measurement results, the terminal determines that only one CSI-RS resource meets the RSRP threshold, assuming it is the second CSI-RS resource, indexed as CRI2. Simultaneously, the terminal measures the RSRP of each of the four 8-port CSI-RS resources and determines that only one CSI-RS resource meets the RSRP threshold, assuming it is the sixth CSI-RS resource, indexed as CRI6. The RSRP threshold can be configured by the network device or determined by the terminal itself.

[0290] The terminal then calculates the RI, PMI, and CQI for each of the two CSI-RS resources. Based on the CSI reporting configuration, subband reporting is used, assuming there are eight subbands. Since the maximum rank of the Rel-16 Type II codebook is 2, the RI value is less than or equal to 2. Therefore, each CSI-RS resource corresponds to a transport block, and its CQI includes one wideband CQI and eight subband CQIs. Using the corresponding CSI calculation method, the information included in the first-level CSI and the second-level CSI is obtained.

[0291] The first-level CSI can be transmitted in the form of a bit map or information field.

[0292] Method 1: The first-level CSI is transmitted using a bitmap. The number of bits in the bitmap is determined by the number of CSI-RS resources associated with the CSI reporting configuration information. RI is reported using eight 3-bit indicator fields. For unselected CSI-RS resources, the corresponding RI value is 0.

[0293] Table 7

[0294] Please refer to Table 7, which illustrates the information included in the first-level CSI when the first-level CSI is transmitted via a bitmap. The first row corresponds to the reporting of the CRI, which is 8 bits in total; the second row corresponds to the reporting of the RI, which is 24 bits in total, with each RI value being 3 bits. The first and second rows indicate CRI2 and CRI6, as well as RI2 and RI6. Furthermore, the first-level CSI also includes the wideband CQI and 8 subband CQIs for transport block 1 corresponding to each reference signal resource indication, as well as the wideband parameters of the PMI corresponding to each reference signal resource indication.

[0295] Method 2: The first-level CSI is transmitted using information fields. The number of information fields is determined by the number of reference signal resource indicators included in the CSI. In one implementation, the CRI for each port number is reported using K (N+1) bits, where N is determined by the logarithm of the number of CSI-RS resources associated with the corresponding port number. The RI is reported using K 3-bit bits. This is as follows:

[0296] Table 8

[0297] Please refer to Table 8, which illustrates the information included in the first-level CSI when the first-level CSI is transmitted via the information field. Based on the above configuration, the CRI for the 16-port CSI-RS resource is reported using K = 2 3-bit indicators. Each 3-bit field corresponds to a CRI, with the first bit indicating whether the CRI field is valid, and the remaining 2 bits indicating the CRI value. For example, in this embodiment, a 0 in the first bit indicates that the CRI field is valid. The first two CRI fields are 16-port CSI-RS resource indication fields, corresponding to CRI2 and the invalid field, respectively. The last two CRI fields are 8-port CSI-RS resource indication fields, corresponding to CRI6 and the invalid field, respectively. CRI2 and CRI6, as well as RI2 and RI6, are indicated in the first and second rows. Furthermore, the first-level CSI also includes the wideband CQI and 8 subband CQIs for transport block 1 corresponding to each reference signal resource indication, as well as the wideband parameters of the PMI corresponding to each reference signal resource indication.

[0298] The information included in the second-level CSI can be found in Table 9 below:

[0299] Table 9

[0300] Referring to Table 9, for each port type, the second-level CSI includes the PMIs corresponding to the reference signal resource indicators of the R reference signal resources corresponding to that port type, where the PMIs are grouped into Group 0, Group 1, and Group 2. As shown in Table 9, the R reference signal resource indicators corresponding to each port type include CRI2 for 16 ports and CRI6 for 8 ports. Therefore, the second-level CSI includes the following information: PMI Group 0, PMI Group 1, and PMI Group 2 corresponding to CRI2, and PMI Group 0, PMI Group 1, and PMI Group 2 corresponding to CRI6.

[0301] If the uplink resources allocated by the base station to the terminal, such as the PUSCH size, are sufficient, the terminal directly feeds back the above result to the base station. Other processes are similar to those in embodiments 1 and 2 and will not be described in detail.

[0302] If the uplink resources allocated by the network device to the terminal, such as the PUSCH resource size, are sufficient, the terminal directly feeds back the CSI to the network device.

[0303] After receiving the CSI, the network device obtains the channel information corresponding to the simulated beams 2 and 6. Further, based on the CSI fed back by other terminals, the terminals that feed back the same simulated beam can be scheduled for MU.

[0304] 2.4. When the CSI reporting configuration information indicates multiple reference signal resources and the number of reference signal resource indications to be reported is at most K, the terminal adopts a two-level reporting method, where the first-level CSI includes reference signal resource indications of R reference signal resources.

[0305] Optionally, for item 2.4, that is, when the CSI reporting configuration information indicates that the number of reference signal resource indications to be reported is at most K, for the first-level CSI, based on information of the CSI at all levels, sending CSI to the network device includes:

[0306] Sending the first level CSI to the network device based on a bitmap, where the number of bits in the bitmap is determined based on the number of the plurality of reference signal resources;

[0307] and / or,

[0308] The first level CSI is sent to the network device based on a plurality of information fields, where the number of the plurality of information fields is determined based on the number of reference signal resource indications included in the CSI.

[0309] In one possible implementation, the CSI reporting configuration information is also used to indicate the reporting of RI. In the case where the CSI reporting method is a secondary reporting method, the first-level CSI may include, in addition to the reference signal resource indication of up to K reference signal resources, M RIs, where M is a positive integer greater than or equal to 1 and less than or equal to K.

[0310] Regardless of the number of port types of the multiple reference signal resources associated with the CSI reporting configuration information, the first-level CSI optionally includes at most K (for example, R) reference signal resource indicators and M RIs, and the second-level CSI includes the PMIs and CQIs corresponding to the reference signal resource indicators of the R reference signal resources.

[0311] Optionally, the first-level CSI includes reference signal resource indicators of the R reference signal resources, M RIs, and the wideband part of the PMI and the wideband part of the CQI corresponding to each of the reference signal resource indicators of the R reference signal resources; the second-level CSI may include the subband part of the PMI and the subband part of the CQI corresponding to each of the reference signal resource indicators of the R reference signal resources;

[0312] Optionally, the first-level CSI may include reference signal resource indications of the R reference signal resources, M RIs, partial information of the PMI corresponding to each of the reference signal resource indications of the R reference signal resources, and partial information of the CQI, and the second-level CSI may include another partial information of the PMI corresponding to each of the reference signal resource indications of the R reference signal resources and another partial information of the CQI.

[0313] The following example E is used to illustrate the implementation of item 2.4.

[0314] Example E:

[0315] The network device configures the terminal to perform CSI reporting. The multiple reference signal resources associated with the CSI reporting configuration information include 8 16-port CSI-RS resources. Different CSI-RS resources here imply corresponding to different analog beams. The network device configures the terminal's reporting quantities including CRI, RI, PMI and CQI through the CSI reporting configuration information. Among them, PMI adopts the Rel-15 Type I codebook and is configured for subband reporting. Further, the CSI reporting configuration information indicates that the number of reference signal resource indications to be reported among the multiple reference signal resources is at most K, and K=4. Since the multiple reference signal resources are all CSI-RS resources, the corresponding reference signal resource indication is CRI. That is, a total of 4 CRIs need to be reported. Based on this, it can be determined that the CSI reporting method is a secondary reporting method or a tertiary reporting method. In Example E, the CSI reporting method is described as a secondary reporting method.

[0316] After receiving the CSI reporting configuration information, the terminal measures the eight 16-port CSI-RS resources. One implementation method is to measure the RSRP of each of the eight 16-port CSI-RS resources. Based on the results, the terminal determines that only three CSI-RS resources meet the RSRP threshold. The RSRP threshold can be configured by the network equipment or determined by the terminal itself. Therefore, the terminal determines to report three CSI-RS resources and obtains the resource indexes of these three CSI-RS resources. Assuming that the three CSI-RS resources to be reported by the terminal are the third CSI-RS resource, the fifth CSI-RS resource, and the seventh CSI-RS resource, the corresponding resource indexes are represented as CRI3, CRI5, and CRI7.

[0317] Furthermore, the terminal calculates the RI, PMI, and CQI of each of the three CSI-RS resources. According to the CSI reporting configuration information, subband reporting is adopted, assuming that there are 8 subbands in total. In this way, the 16-port PMI of each CSI-RS resource includes a wideband PMI and 8 subband PMIs. If the RI value is less than or equal to 4, each CSI-RS resource corresponds to one transport block, and its CQI includes 1 wideband CQI and 8 subband CQIs. If the RI value is greater than 4, each CSI-RS resource corresponds to two transport blocks, and each transport block corresponds to 1 wideband CQI and 8 subband CQIs. Taking the case where the RI value is greater than 4 as an example, the corresponding CSI calculation method is used to obtain the information included in the first-level CSI and the information included in the second-level CSI.

[0318] The first-level CSI can be transmitted in the form of a bit map or information field.

[0319] Method 1: The first-level CSI is transmitted using a bitmap. The number of bits in the bitmap is determined by the number of CSI-RS resources associated with the CSI reporting configuration information. RI is reported using eight 3-bit indicator fields. For unselected CSI-RS resources, the corresponding RI value is 0.

[0320] When the first-level CSI is transmitted in a bitmap format, the information included in the first-level CSI can be found in Table 10 below:

[0321] Table 10

[0322] Table 10 illustrates the information included in the first-level CSI when transmitting the first-level CSI via a bitmap. In Table 10, the first row corresponds to the CRI reporting, totaling 8 bits; the second row corresponds to the RI reporting, totaling 24 bits, with each RI value taking 3 bits. Furthermore, as shown in Table 10, the first-level CSI also includes the wideband CQI and eight subband CQIs for transport block 1 corresponding to each CRI.

[0323] Method 2: The first-level CSI is transmitted using information fields. The number of information fields is determined by the number of reference signal resource indicators included in the CSI. In one implementation, the CRI is reported using K (N+1) bits, where N is determined by the logarithm of the number of CSI-RS resources associated with the report. The RI is reported using K 3-bit bits.

[0324] When the first-level CSI is transmitted in the form of an information field, the information included in the first-level CSI can be referred to in the following Table 11:

[0325] Table 11

[0326] Please refer to Table 11, which shows the information included in the first-level CSI when the first-level CSI is transmitted by means of an information field. According to the above configuration, CRI reporting uses K=4 4-bit indications. Each 4-bit corresponds to a CRI, the first bit of which indicates whether the CRI field is valid, and the remaining 3 bits indicate the value of the CRI. For example, in this embodiment, the first bit is 0, indicating that the CRI field is valid, that is, the first three CRI fields correspond to CRI3, CRI5, and CRI7, respectively. The fourth CRI field is invalid. For the valid CRI field, the corresponding RI value is reported. Furthermore, the first-level CSI also includes the wideband CQI and 8 sub-band CQIs of the transport block 1 corresponding to each reference signal resource indication.

[0327] The information included in the second-level CSI can be found in Table 12 below:

[0328] Table 12

[0329] Please refer to Table 12. For each port type, the second-level CSI includes partial information of the PMI and CQI corresponding to the reference signal resource indication of the R reference signal resources corresponding to the port type, wherein for any reference signal resource indication, the PMI corresponding to the reference signal resource indication includes the wideband PMI, odd subband PMI and even subband PMI, and the partial information of the CQI corresponding to the reference signal resource indication includes the wideband CQI, odd subband CQI and even subband CQI of the transport block 2 corresponding to the reference signal resource.

[0330] If the uplink resources allocated by the network device to the terminal, such as the PUSCH resource size, are sufficient, the terminal directly feeds back the CSI to the network device.

[0331] After receiving the CSI, the network device obtains the channel information corresponding to analog beams 1, 3, 5, and 7. Further, based on the CSI feedback from other terminals, the terminals that feedback the same analog beam can be scheduled for MU.

[0332] In the case of a three-level CSI reporting method, CSI includes first-level CSI, second-level CSI, and third-level CSI. The following describes the information included in the first-level CSI, second-level CSI, and third-level CSI in different situations.

[0333] In the three-level reporting method, the information included in the first-level CSI and the second-level CSI is more important than the information included in the third-level CSI. The first-level CSI and the second-level CSI usually include fixed overhead information, while the third-level CSI usually includes non-fixed overhead information.

[0334] For the three-level reporting method, the fixed overhead information may include, for example, the reference signal resource indication and RI, and the non-fixed overhead information may include, for example, the PMI and the CQI; or, the fixed overhead information may include, for example, the reference signal resource indication, RI, the broadband part of the PMI and the broadband part of the CQI, and the non-fixed overhead information may include, for example, the subband part of the PMI and the subband part of the CQI; or, the fixed overhead information may include, for example, the reference signal resource indication, RI, part of the PMI information and part of the CQI information, and the non-fixed overhead information may include, for example, another part of the PMI information and another part of the CQI information.

[0335] The first-level CSI includes the number of reference signal resources. When the configured codebook is a Type I codebook, the wideband portion of the CQI and PMI is included in the second-level CSI, while the subband portion is included in the third-level CSI. When the configured codebook is a Type II codebook, part of the CQI and PMI is included in the second-level CSI, while the remaining part is included in the third-level CSI.

[0336] Correspondingly, for the three-level reporting method, the second-level CSI may include a reference signal resource indication and RI, and the third-level CSI may include a PMI and a CQI; or, the second-level CSI may include a reference signal resource indication, RI, a wideband part of the PMI, and a wideband part of the CQI, and the third-level CSI may include a subband part of the PMI and a subband part of the CQI; or, the second-level CSI may include a reference signal resource indication, RI, part of the PMI information, and part of the CQI information, and the third-level CSI may include another part of the PMI information and another part of the CQI information.

[0337] The following describes the information included in the first-level CSI, the second-level CSI, and the third-level CSI in the three-level reporting mode with reference to specific examples.

[0338] 3.1. When the CSI reporting configuration information indicates that, for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is at most K, then, for each port type, the first-level CSI includes the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type, and the second-level CSI includes reference signal resource indications of R reference signal resources corresponding to each port type, where R is a positive integer greater than or equal to 1 and less than or equal to K.

[0339] In one possible implementation, the CSI reporting configuration information is also used to indicate reporting of RI. In the case where the CSI reporting mode is a three-level reporting mode, the second-level CSI may include, in addition to the reference signal resource indications of the R reference signal resources corresponding to each port type, M RIs, where M is a positive integer greater than or equal to 1 and less than or equal to K.

[0340] Taking the case where multiple reference signal resources include a total of n port types as an example, optionally, the first-level CSI includes the number of reference signal resource indications of R reference signal resources corresponding to each port type (i.e., the reference signal resource indications of n*R reference signal resources), the second-level CSI includes the reference signal resource indications of the n*R reference signal resources and M RIs, and the third-level CSI may include the PMI and CQI corresponding to each of the reference signal resource indications of the n*R reference signal resources;

[0341] Optionally, the first-level CSI includes the number of reference signal resource indicators of the n*R reference signal resources, the second-level CSI includes the reference signal resource indicators of the n*R reference signal resources, M RIs, and the wideband part of the PMI and the wideband part of the CQI corresponding to each of the reference signal resource indicators of the n*R reference signal resources, and the third-level CSI may include the subband part of the PMI and the subband part of the CQI corresponding to each of the reference signal resource indicators of the n*R reference signal resources;

[0342] Optionally, the first-level CSI includes the number of reference signal resource indications of the n*R reference signal resources, the second-level CSI may include the reference signal resource indications of the n*R reference signal resources, M RIs, partial information of the PMI corresponding to the reference signal resource indications of the n*R reference signal resources, and partial information of the CQI, and the third-level CSI may include another part of the PMI corresponding to the reference signal resource indications of the n*R reference signal resources and another part of the CQI.

[0343] The following example F is used to illustrate the implementation of item 3.1.

[0344] Example F:

[0345] The network device configures the terminal to report CSI. The multiple reference signal resources associated with the CSI reporting configuration information include four 16-port CSI-RS resources and four 8-port CSI-RS resources, corresponding to the 1st CSI-RS resource to the 8th CSI-RS resource respectively. Different CSI-RS resources here imply different analog beams. The network device configures the terminal's reporting quantities including CRI, RI, PMI and CQI through the CSI reporting configuration information. Among them, PMI adopts the Rel-16 Type II codebook and is configured as subband CQI feedback. Further, the CSI reporting configuration information indicates that for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is at most K, and K=2. Since multiple reference signal resources are CSI-RS resources, the corresponding reference signal resource indication is CRI. Because the multiple reference signal resources involve two port types, 16-port and 8-port, the number of reference signal resource indicators to be reported in each port type of reference signal resource is at most K. That is, a 16-port CSI-RS resource reports a maximum of 2 CRIs, and an 8-port CSI-RS resource reports a maximum of 2 CRIs. Based on this, it can be determined whether the CSI reporting mode is a secondary reporting mode or a tertiary reporting mode. Example F uses the tertiary reporting mode as an example.

[0346] After receiving the CSI reporting configuration information, the terminal measures the RSRP of each of the four 16-port CSI-RS resources and the four 8-port CSI-RS resources. Based on the RSRP measurement results, the terminal determines that only one CSI-RS resource meets the RSRP threshold, assuming it is the second CSI-RS resource, indexed as CRI2. Simultaneously, the terminal measures the RSRP of each of the four 8-port CSI-RS resources and determines that only one CSI-RS resource meets the RSRP threshold, assuming it is the sixth CSI-RS resource, indexed as CRI6. The RSRP threshold can be configured by the network device or determined by the terminal itself.

[0347] Furthermore, the terminal calculates the RI, PMI, and CQI for each of the two CSI-RS resources. Based on the CSI reporting configuration, subband reporting is used, assuming there are eight subbands. Since the maximum rank of the Rel-16 Type II codebook is 2, the RI value is less than or equal to 2. Therefore, each CSI-RS resource corresponds to a transport block, and its CQI includes one wideband CQI and eight subband CQIs. Using the corresponding CSI calculation method, the information included in the first-level CSI, the second-level CSI, and the third-level CSI is obtained.

[0348] The first-level CSI can be transmitted in the form of a bit map or information field.

[0349] Method 1: The first-level CSI is transmitted using a bitmap. The number of bits in the bitmap is determined by the number of CSI-RS resources associated with the CSI reporting configuration information. The number of bits in this bitmap is equal to the number of CSI-RS resources for each port number associated with the report.

[0350] When the first-level CSI is transmitted in a bitmap format, the information included in the first-level CSI can be found in Table 13 below:

[0351] Table 13

[0352] Please refer to Table 13, which illustrates the information included in the first-level CSI when the first-level CSI is transmitted via a bitmap. The first 4 bits correspond to the 16-port CSI-RS resource, and the last 4 bits correspond to the 8-port CSI-RS resource. Based on Table 13, it can be seen that for the 16-port reference signal resource, the number of CRIs reported is 1, and for the 8-port reference signal resource, the number of CRIs reported is 1.

[0353] Method 2: The first-level CSI is transmitted using information fields. The number of information fields is determined by the number of reference signal resource indicators included in the CSI. The number of bits in this field is determined by the logarithm of the number of CSI-RS resources for each port number associated with the report.

[0354] When the first-level CSI is transmitted in the form of an information field, the information included in the first-level CSI can be referred to in the following Table 14:

[0355] Table 14

[0356] Please refer to Table 14, which illustrates the information included in the first-level CSI when the first-level CSI is transmitted via the information field. Since each port is configured with four CSI-RS resources, each field in this feedback uses two bits. Based on Table 14, for a 16-port reference signal resource, the number of reported CRIs is L = 1, and for an 8-port reference signal resource, the number of reported CRIs is L = 1.

[0357] The information included in the second-level CSI can be found in Table 15 below:

[0358] Table 15

[0359] As shown in Table 15, the second-level CSI includes the wideband CQI and eight subband CQIs for transport block 1 corresponding to each reference signal resource indication, as well as the wideband parameters of the PMI corresponding to each reference signal resource indication. Each CRI uses 2 bits for feedback, and each RI uses 1 bit for feedback.

[0360] The information included in the third-level CSI can be found in Table 16 below:

[0361] Table 16

[0362] Referring to Table 16, for each port type, the third-level CSI includes the PMIs corresponding to the reference signal resource indicators of the R reference signal resources corresponding to that port type, where the PMIs are grouped into Group 0, Group 1, and Group 2. As shown in Table 16, the R reference signal resource indicators corresponding to each port type include CRI2 for 16 ports and CRI6 for 8 ports. The second-level CSI includes the following information: PMI Group 0, PMI Group 1, and PMI Group 2 corresponding to CRI2, and PMI Group 0, PMI Group 1, and PMI Group 2 corresponding to CRI6.

[0363] If the uplink resources allocated by the network device to the terminal, such as the PUSCH resource size, are sufficient, the terminal directly feeds back the CSI to the network device.

[0364] After receiving the CSI, the network device obtains the channel information corresponding to the simulated beams 2 and 6. Further, based on the CSI fed back by other terminals, the terminals that feed back the same simulated beam can be scheduled for MU.

[0365] 3.2. When the CSI reporting configuration information indicates multiple reference signal resources and the total number of reference signal resource indications to be reported is at most K, the first-level CSI includes the total number of reference signal resource indications to be reported, and the second-level CSI includes the reference signal resource indications of R reference signal resources.

[0366] In one possible implementation, the CSI reporting configuration information is also used to indicate the reporting of RI. In the case where the CSI reporting method is a three-level reporting method, the second-level CSI may include, in addition to the reference signal resource indication of R reference signal resources, M RIs, where M is a positive integer greater than or equal to 1 and less than or equal to K.

[0367] Regardless of the number of port types of the multiple reference signal resources associated with the CSI reporting configuration information, the first-level CSI optionally includes reference signal resource indications of at most K (taking R as an example, the number of reference signal resource indications, which are included in the second-level CSI) R reference signal resources, and may further include M RIs. The third-level CSI includes the PMIs and CQIs corresponding to the reference signal resource indications of the R reference signal resources.

[0368] Optionally, the first-level CSI includes at most K (taking R as an example, the number of reference signal resource indications), the second-level CSI includes the reference signal resource indications of the R reference signal resources, M RIs, and the wideband part of the PMI and the wideband part of the CQI corresponding to each of the reference signal resource indications of the R reference signal resources. The third-level CSI may include the subband part of the PMI and the subband part of the CQI corresponding to each of the reference signal resource indications of the R reference signal resources;

[0369] Optionally, the first-level CSI includes at most K (taking R as an example, the number of reference signal resource indications), the second-level CSI may include reference signal resource indications of the R reference signal resources, M RIs, partial information of the PMI corresponding to each of the reference signal resource indications of the R reference signal resources, and partial information of the CQI, and the third-level CSI may include another partial information of the PMI corresponding to each of the reference signal resource indications of the R reference signal resources and another partial information of the CQI.

[0370] The following example G is used to illustrate the implementation of item 3.2.

[0371] Example G:

[0372] The network device configures the terminal to perform CSI reporting. The multiple reference signal resources associated with the CSI reporting configuration information include 8 16-port CSI-RS resources. Different CSI-RS resources here imply corresponding to different analog beams. The network device configures the terminal's reporting quantities including CRI, RI, PMI and CQI through the CSI reporting configuration information. Among them, PMI adopts the Rel-16 Type II codebook and is configured as subband CQI feedback. Further, the CSI reporting configuration information indicates that the number of reference signal resource indications to be reported among the multiple reference signal resources is at most K, K=4. Since the multiple reference signal resources are all CSI-RS resources, the corresponding reference signal resource indication is CRI. That is, a maximum of 4 CRIs are reported. Based on this, it can be determined that the CSI reporting method is a secondary reporting method or a tertiary reporting method. In Example G, the CSI reporting method is introduced as a tertiary reporting method.

[0373] After receiving the CSI reporting configuration information, the terminal measures the eight 16-port CSI-RS resources. One implementation method is to measure the RSRP of each of the eight 16-port CSI-RS resources. Based on the measurement results, the terminal determines that only two CSI-RS resources meet the RSRP threshold. The RSRP threshold can be configured by the network equipment or determined by the terminal itself. Therefore, the terminal determines to report two CSI-RS resources and obtains the resource indexes for these two CSI-RS resources. Assuming that the two results measured by the terminal are the third and fifth CSI-RS resources, the corresponding resource indexes are denoted as CRI3 and CRI5.

[0374] Furthermore, the terminal calculates the RI, PMI, and CQI for each of the two CSI-RS resources. Based on the CSI reporting configuration, subband reporting is used, assuming there are eight subbands. Since the maximum rank of the Rel-16 Type II codebook is 2, the RI value is less than or equal to 2. Thus, each CSI-RS resource corresponds to a transport block, and its CQI includes one wideband CQI and eight subband CQIs. Using the corresponding CSI calculation method, the information included in the first-level CSI, the second-level CSI, and the third-level CSI is obtained.

[0375] The first-level CSI can be transmitted in the form of a bit map or information field.

[0376] Method 1: The first-level CSI is transmitted using a bitmap. The number of bits in this part is equal to the number of CSI-RS resources associated with this report.

[0377] When the first-level CSI is transmitted in a bitmap format, the information included in the first-level CSI can be found in Table 17 below:

[0378] Table 17

[0379] Table 17 illustrates the information included in the first-level CSI when the first-level CSI is transmitted via a bitmap. Since eight CSI-RS resources are configured, this bitmap uses eight bits. Table 17 shows that the number of CRIs reported is two.

[0380] Method 2: The first-level CSI is transmitted using the information field. The number of bits in this part is determined by the logarithm of the number of CSI-RS resources associated with the report.

[0381] When the first-level CSI is transmitted in the form of an information field, the information included in the first-level CSI can be referred to in Table 18 below:

[0382] Table 18

[0383] See Table 18, which illustrates the information included in the first-level CSI when the first-level CSI is transmitted via the information field. Since eight CSI-RS resources are configured, this feedback uses three bits. Based on Table 18, the number of CRIs reported is two.

[0384] The information included in the second-level CSI can be found in Table 19 below:

[0385] Table 19

[0386] As shown in Table 19, the second-level CSI includes the wideband CQI and eight subband CQIs for transport block 1 corresponding to each reference signal resource indicator, as well as the wideband parameters of the PMI corresponding to each reference signal resource indicator. Each CRI uses 3 bits for feedback, and each RI uses 1 bit for feedback.

[0387] The information included in the third-level CSI can be found in Table 20 below:

[0388] Table 20

[0389] Referring to Table 20, the third-level CSI includes the PMIs corresponding to the reference signal resource indicators of R reference signal resources, where the PMIs are grouped into Group 0, Group 1, and Group 2. As shown in Table 20, the R reference signal resource indicators include CRI3 and CRI5. The third-level CSI includes the following information: PMI Group 0, PMI Group 1, and PMI Group 2 corresponding to CRI3, and PMI Group 0, PMI Group 1, and PMI Group 2 corresponding to CRI5.

[0390] If the uplink resources allocated by the network device to the terminal, such as the PUSCH resource size, are sufficient, the terminal directly feeds back the CSI to the network device.

[0391] After receiving the CSI, the network device obtains the channel information corresponding to simulated beams 3 and 5. Further, based on the CSI feedback from other terminals, the terminals that feedback the same simulated beam can be scheduled for MU.

[0392] For Examples A through G, it is assumed that the number of CRI reports is the same as the number of RI reports. If multiple RI reports have the same value, only RIs with different values ​​can be reported. In this case, the number of RI reports can be smaller than the number of CRI reports.

[0393] S23: Send CSI to the network device based on the information of CSI at each level.

[0394] In S22, how to determine CSI information at each level based on CSI reporting configuration information and CSI reporting mode is described in conjunction with Examples A to G. After determining CSI information at each level, CSI can be sent to the network device based on the CSI information at each level.

[0395] The network device allocates uplink resources to the terminal for reporting CSI. If the uplink resources allocated by the network device are greater than or equal to the uplink resources required for CSI transmission, the terminal reports CSI at all levels based on the allocated uplink resources. If the uplink resources allocated by the network device are less than the uplink resources required for CSI transmission, the terminal needs to discard some CSI information. This process is described below with reference to Figure 3.

[0396] FIG3 is a flowchart of discarding part of CSI information provided by an embodiment of the present disclosure, as shown in FIG3 , including:

[0397] S31 : When the uplink resource allocated by the network device to the terminal is less than the uplink resource required for transmitting the CSI, determine the number of CSIs, where the number of CSIs is one or more.

[0398] The uplink resources allocated by the network device to the terminal are used to transmit CSI. If the uplink resources allocated by the network device to the terminal are greater than or equal to the uplink resources required to transmit CSI, the terminal can send the CSI to the network device based on the information of each level of CSI. For the second-level reporting method, the terminal sends the CSI to the network device based on the information of the first-level CSI and the second-level CSI. For the third-level reporting method, the terminal sends the CSI to the network device based on the information of the first-level CSI, the second-level CSI, and the third-level CSI.

[0399] When the uplink resources allocated by the network device to the terminal are less than the uplink resources required for transmitting the CSI, some information in the CSI needs to be discarded appropriately. In the embodiment of the present disclosure, the number of CSIs can be one or more, and the number of CSIs needs to be determined first.

[0400] S32: Determine a target CSI in the CSI based on the number of CSIs.

[0401] The target CSI is the CSI for which some information needs to be discarded. If there is only one CSI, this CSI is determined as the target CSI. If there are multiple CSIs, the terminal can determine the target CSI from the multiple CSIs based on their priorities.

[0402] The priorities of multiple CSIs can be determined by the terminal. For example, the priorities of multiple CSIs can be determined based on the order in which the multiple CSIs are reported. The earlier the CSI is reported, the higher the priority of the CSI, and the later the CSI is reported, the lower the priority of the CSI. Based on the priorities of the multiple CSIs, the CSI with the lowest priority among the multiple CSIs is determined as the target CSI. In the embodiments of the present disclosure, the target CSI is also determined in combination with the size of the uplink resources allocated by the network device to the terminal and the uplink resources required for the transmission of each CSI.

[0403] S33: discard all or part of the information in the last level CSI in the target CSI.

[0404] Among them, when the CSI reporting mode is a two-level reporting mode, the last level CSI is the second-level CSI; when the CSI reporting mode is a three-level reporting mode, the last level CSI is the third-level CSI.

[0405] Specifically, the terminal determines the reference signal resource indication priority of each of the first number of reference signal resource indications included in the target CSI, and determines a second number of target reference signal resource indications from the first number of reference signal resource indications based on the reference signal resource indication priorities, where the second number is less than or equal to the first number. Furthermore, information corresponding to the second number of target reference signal resource indications in the last-level CSI is discarded.

[0406] The information corresponding to the second number of target reference signal resource indicators in the last level of CSI may include wideband CSI, even subband CSI, odd subband CSI, or PMI. Therefore, for each target reference signal resource indicator, when the last level of CSI includes the wideband CSI, even subband CSI, and odd subband CSI corresponding to each target reference signal resource indicator, the terminal discards the information corresponding to the second number of target reference signal resource indicators in the last level of CSI, including: determining the bandwidth priority of the wideband CSI, even subband CSI, and odd subband CSI, respectively, with the bandwidth priorities of the wideband CSI, even subband CSI, and odd subband CSI decreasing in sequence; and discarding all or part of the information corresponding to the target reference signal resource indicator based on the bandwidth priority.

[0407] That is, for any target reference signal resource indication, the odd subband CSI corresponding to the target reference signal resource indication is discarded first, followed by the even subband CSI corresponding to the target reference signal resource indication, and finally the wideband CSI corresponding to the target reference signal resource indication. The target reference signal resource indication may be all or part of the reference signal resource indication included in the target CSI.

[0408] For each target reference signal resource indication, when the last level CSI includes the PMI corresponding to each target reference signal resource indication, the terminal discards the information corresponding to the second number of target reference signal resource indications in the last level CSI, including: determining the PMI grouping priority corresponding to the target reference signal resource indication; based on the PMI grouping priority, discarding all or part of the information corresponding to the target reference signal resource indication.

[0409] The PMI includes Group 0 PMI, Group 1 PMI, and Group 2 PMI. The PMI grouping priorities of Group 0 PMI, Group 1 PMI, and Group 2 PMI are descending in order. That is, for any target reference signal resource indication, the Group 2 PMI corresponding to the target reference signal resource indication is discarded first, followed by the Group 1 PMI corresponding to the target reference signal resource indication, and finally the Group 0 PMI corresponding to the target reference signal resource indication. The target reference signal resource indication may be all or part of the reference signal resource indication included in the target CSI.

[0410] The following describes an implementation scheme for discarding all or part of the information in the last level CSI in the target CSI with reference to a specific example.

[0411] If the uplink resources allocated by the network device to the terminal are less than the uplink resources required to transmit the CSI, the terminal will discard some of the information in the CSI. To ensure consistent understanding between the terminal and the network device, it is necessary to define a discard priority, with lower-priority information discarded first. Examples H through K are based on the CSI, with the reference signal resource indicator (CRI) and the number of CRIs included in the CSI being K.

[0412] Example H:

[0413] For the secondary reporting method, the second-level CSI will be divided into multiple priorities. For the tertiary reporting method, the third-level CSI will be divided into multiple priorities. Depending on the codebook type configured for reporting, one implementation method is to adopt the following discarding priorities respectively.

[0414] The following Table 21 illustrates the discarding priority of the second-level CSI of the secondary reporting mode or the third-level CSI of the three-level reporting mode when the Type I codebook is configured, where a smaller priority number indicates a higher priority.

[0415] Table 21

[0416] As shown in Table 21, the highest priority is priority 0, which includes the wideband CSI portion corresponding to each CRI in the CSI. For example, the wideband CSI in Example B includes the wideband PMI and the wideband CQI for transport block 2. Priority 1 includes the even subband CSI portion corresponding to each CRI in the CSI. For example, the even subband CSI in Example B includes the even subband PMI and the even subband CQI for transport block 2. Priority 2 includes the odd subband CSI portion corresponding to each CRI in the CSI. For example, the odd subband CSI in Example B includes the odd subband PMI and the odd subband CQI for transport block 2.

[0417] When discarding is required, the information in priority 2 is discarded first. If the feedback overhead after discarding is still greater than the uplink resources allocated by the network device, the information in priority 1 is discarded, and so on.

[0418] The following Table 22 illustrates the discarding priority of the second-level CSI in the secondary reporting mode or the third-level CSI in the three-level reporting mode when configured as the Type II codebook, where a smaller priority number indicates a higher priority.

[0419] Table 22

[0420] As shown in Table 22, the highest priority is priority 0, which includes the PMI portion of Group 0 corresponding to each CRI in the CSI. Priority 1 includes the PMI portion of Group 1 corresponding to each CRI in the CSI. Priority 2 includes the PMI portion of Group 2 corresponding to each CRI in the CSI. When discarding is required, information in priority 2 is discarded first. If the feedback overhead after discarding is still greater than the uplink resources allocated by the network device, information in priority 1 is discarded, and so on.

[0421] Example I:

[0422] For the secondary reporting method, the second-level CSI will be divided into multiple priorities. For the tertiary reporting method, the third-level CSI will be divided into multiple priorities. Depending on the codebook type configured for reporting, one implementation method is to adopt the following discarding priorities respectively.

[0423] The following Table 23 illustrates the discarding priority of the second-level CSI of the secondary reporting mode or the third-level CSI of the three-level reporting mode when the Type I codebook is configured, where the smaller the priority number, the higher the priority.

[0424] Table 23

[0425] As shown in Table 23, the highest priority is priority 0, which includes the wideband CSI portion corresponding to each CRI in the CSI. For example, the wideband CSI in Example B includes the wideband PMI and the wideband CQI of transport block 2. Priority 1 includes the even subband CSI portion corresponding to the first CRI in the CSI. Priority 2 includes the odd subband CSI portion corresponding to the first CRI in the CSI. Priority 3 includes the even subband CSI portion corresponding to the second CRI in the CSI. Priority 4 includes the odd subband CSI portion corresponding to the second CRI in the CSI. And so on. During the discarding process, information with lower priority is discarded first.

[0426] Table 24 below illustrates the discarding priority of the second-level CSI in the secondary reporting mode or the third-level CSI in the three-level reporting mode when configured as a Type II codebook, where a smaller priority number indicates a higher priority.

[0427] Table 24

[0428] As shown in Table 24, the highest priority is priority 0, which includes the PMI portion of Group 0 corresponding to each CRI in the CSI. Priority 1 includes the PMI portion of Group 1 corresponding to the first CRI in the CSI. Priority 2 includes the PMI portion of Group 2 corresponding to the first CRI in the CSI. Priority 3 includes the PMI portion of Group 1 corresponding to the second CRI in the CSI. Priority 4 includes the PMI portion of Group 2 corresponding to the second CRI in the CSI. And so on. During the discard process, information with lower priorities is discarded first.

[0429] Example J:

[0430] For the secondary reporting method, the second-level CSI will be divided into multiple priorities. For the tertiary reporting method, the third-level CSI will be divided into multiple priorities. Depending on the codebook type configured for reporting, one implementation method is to adopt the following discarding priorities respectively.

[0431] The following Table 25 illustrates the discarding priority of the second-level CSI of the secondary reporting mode or the third-level CSI of the three-level reporting mode when configured as Type I codebook, where the smaller the priority number, the higher the priority.

[0432] Table 25

[0433] As shown in Table 25, the highest priority is priority 0, which includes all CSI corresponding to the first reported CRI. For example, in Example B, this includes the wideband PMI, wideband CQI for transport block 2, even subband CSI, and odd subband CSI. Priority 1 includes all CSI corresponding to the second reported CRI. Priority 2 includes all CSI corresponding to the third reported CRI, and so on. This method discards CRIs in the order they were reported, with CSI corresponding to later CRIs discarded first.

[0434] Table 26 below illustrates the discarding priority of the second-level CSI in the secondary reporting mode or the third-level CSI in the three-level reporting mode when configured as a Type II codebook, where a smaller priority number indicates a higher priority.

[0435] Table 26

[0436] As shown in Table 26, the highest priority is priority 0, which includes the PMI portion of Group 0 corresponding to the first reported CRI. Priority 1 includes the PMI portion of Group 1 corresponding to the first reported CRI. Priority 2 includes the PMI portion of Group 2 corresponding to the first reported CRI. Priority 3 includes the PMI portion of Group 0 corresponding to the second reported CRI. Priority 4 includes the PMI portion of Group 1 corresponding to the second reported CRI. Priority 5 includes the PMI portion of Group 2 corresponding to the second reported CRI. And so on. During the discarding process, information with lower priorities is discarded first.

[0437] Example K:

[0438] Examples H to J illustrate implementations of discarding all or part of the information in the last level of CSI when the number of reported CSIs is 1. When multiple CSI reports are simultaneously available, the priorities among the multiple CSI reports need to be further considered.

[0439] Table 27 below illustrates the discarding priority of the second-level CSI in the secondary reporting mode or the third-level CSI in the three-level reporting mode when N CSI reports are configured as Type I codebook, where a smaller priority number indicates a higher priority.

[0440] Table 27

[0441] As shown in Table 27, the highest priority is priority 0, which includes the wideband CSI corresponding to each CRI in each reported CSI. Priority 1 includes the even subband CSI corresponding to each CRI in the first reported CSI. Priority 2 includes the odd subband CSI corresponding to each CRI in the first reported CSI. Priority 3 includes the even subband CSI corresponding to each CRI in the second reported CSI. Priority 4 includes the odd subband CSI corresponding to each CRI in the second reported CSI. And so on. During the discarding process, information with lower priority is discarded first.

[0442] Table 28 below illustrates the discarding priority of the second-level CSI in the secondary reporting mode or the third-level CSI in the three-level reporting mode when N CSI reports are configured as a Type II codebook, where a smaller priority number indicates a higher priority.

[0443] Table 28

[0444] As shown in Table 28, the highest priority is priority 0, which includes the PMI portion of group 0 corresponding to each CRI in each reported CSI. Priority 1 includes the PMI portion of group 1 corresponding to each CRI in the first reported CSI. Priority 2 includes the PMI portion of group 2 corresponding to each CRI in the first reported CSI. Priority 3 includes the PMI portion of group 1 corresponding to each CRI in the second reported CSI. Priority 4 includes the PMI portion of group 2 corresponding to each CRI in the second reported CSI. And so on. During the discarding process, information with lower priority is discarded first.

[0445] Table 29 below illustrates the discarding priority of the second-level CSI in the secondary reporting mode or the third-level CSI in the three-level reporting mode when N CSI reports are configured as a Type II codebook, where a smaller priority number indicates a higher priority.

[0446] Table 29

[0447] As shown in Table 29, the highest priority is priority 0, which includes the PMI portion of Group 0 corresponding to each CRI in each reported CSI. Priority 1 includes the PMI portion of Group 1 corresponding to the first CRI in the first reported CSI. Priority 2 includes the PMI portion of Group 2 corresponding to the first CRI in the first reported CSI. Priority 3 includes the PMI portion of Group 1 corresponding to the second CRI in the first reported CSI. Priority 4 includes the PMI portion of Group 2 corresponding to the second CRI in the first reported CSI. And so on. During the discarding process, information with lower priority is discarded first.

[0448] In summary, the solution of the embodiment of the present disclosure can report CSI through a secondary reporting method or a tertiary reporting method, feedback the CSI channel characteristics corresponding to multiple simulated beams in a single CSI report, support CSI reporting when the network device is unknown to the number of simulated beams reported by the terminal, and improve the flexibility of CSI reporting. By setting the corresponding priority, partial CSI information can be discarded when the uplink resources allocated by the network device are insufficient, and support CSI reporting under uplink resource conditions of different sizes, so that the network device can flexibly implement MU pairing transmission under different simulated beams.

[0449] FIG4 is a schematic diagram of the structure of a terminal provided by an embodiment of the present disclosure. As shown in FIG4 , the terminal includes a memory 420, a transceiver 400, and a processor 410, wherein:

[0450] The memory 420 is used to store computer programs; the transceiver 400 is used to send and receive data under the control of the processor 410; the processor 410 is used to read the computer program in the memory 420 and perform the following operations:

[0451] receiving CSI reporting configuration information sent by a network device, where the CSI reporting configuration information is associated with multiple reference signal resources;

[0452] measuring a plurality of reference signal resources to obtain measurement results for each of the plurality of reference signal resources, the measurement results including a reference signal resource indication;

[0453] Based on the CSI reporting configuration information and the measurement results of each of the multiple reference signal resources, CSI is sent to the network device, where the CSI includes a first number of reference signal resource indications, and the first number is at least two.

[0454] In FIG4 , the bus architecture may include any number of interconnected buses and bridges, specifically various circuits connected together by one or more processors represented by processor 410 and memory represented by memory 420. The bus architecture may also connect various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver 400 may be a plurality of components, including a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, such as a wireless channel, a wired channel, an optical cable, and the like. For different user devices, the user interface 430 may also be an interface capable of connecting external or internal devices as required, and the connected devices include but are not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

[0455] The processor 410 is responsible for managing the bus architecture and general processing, and the memory 420 can store data used by the processor 410 when performing operations.

[0456] In some embodiments, the processor 410 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or a complex programmable logic device (CPLD). The processor may also adopt a multi-core architecture.

[0457] The processor calls the computer program stored in the memory to execute any method provided by the embodiment of the present disclosure according to the obtained executable instructions. The processor and the memory can also be arranged physically separately.

[0458] In some embodiments, sending CSI to a network device based on CSI reporting configuration information and measurement results of each of a plurality of reference signal resources includes:

[0459] Determine a CSI reporting mode based on the CSI reporting configuration information, where the CSI reporting mode includes a secondary reporting mode or a tertiary reporting mode;

[0460] Determine CSI information of each level from measurement results of multiple reference signal resources based on CSI reporting configuration information and CSI reporting mode;

[0461] Based on the information of CSI at each level, CSI is sent to the network device.

[0462] In some embodiments, the CSI reporting configuration information is used to indicate any of the following:

[0463] For each port type, the number of reference signal resource indicators to be reported in the reference signal resources corresponding to each port type is K;

[0464] The total number of reference signal resource indications to be reported among the multiple reference signal resources is K;

[0465] For each port type, the number of reference signal resource indicators to be reported in the reference signal resources corresponding to each port type is at most K;

[0466] The total number of reference signal resource indications to be reported among the multiple reference signal resources is at most K;

[0467] K is a positive integer greater than 1.

[0468] In some embodiments, when the CSI reporting configuration information indicates that for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is K, or when the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported in multiple reference signal resources is K, the CSI reporting mode is a secondary reporting mode;

[0469] When the CSI reporting configuration information indicates that for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is at most K, or when the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported in multiple reference signal resources is at most K, the CSI reporting mode is the secondary reporting mode or the tertiary reporting mode.

[0470] In some embodiments, the CSI reporting method is a secondary reporting method. For the first-level CSI in the secondary reporting method, any one of the following conditions is met:

[0471] When the CSI reporting configuration information indicates that, for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is K, then, for each port type, the first-level CSI includes reference signal resource indications of the K reference signal resources corresponding to each port type;

[0472] In a case where the total number of reference signal resource indications to be reported among multiple reference signal resources indicated in the CSI reporting configuration information is K, the first-level CSI includes reference signal resource indications of the K reference signal resources;

[0473] When the CSI reporting configuration information indicates that, for each port type, the number of reference signal resources corresponding to each port type and the number of reference signal resource indications to be reported are both at most K, then, for each port type, the first-level CSI includes, for each port type, reference signal resource indications of R reference signal resources corresponding to each port type, where R is a positive integer greater than or equal to 1 and less than or equal to K.

[0474] When the CSI reporting configuration information indicates multiple reference signal resources and the total number of reference signal resource indications to be reported is at most K, the first-level CSI includes reference signal resource indications of R reference signal resources.

[0475] In some embodiments, when the CSI reporting configuration information indicates that, for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is at most K, or indicates that the total number of reference signal resource indications to be reported in multiple reference signal resources is at most K, for the first level CSI, based on information of the CSI at each level, sending the CSI to the network device includes:

[0476] Sending the first level CSI to the network device based on a bitmap, where the number of bits in the bitmap is determined based on the number of the plurality of reference signal resources;

[0477] and / or,

[0478] The first level CSI is sent to the network device based on a plurality of information fields, where the number of the plurality of information fields is determined based on the number of reference signal resource indications included in the CSI.

[0479] In some embodiments, the CSI reporting method is a three-level reporting method. For the first-level CSI and the second-level CSI in the three-level reporting method, any one of the following conditions is met:

[0480] When the CSI reporting configuration information indicates that, for a port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is at most K, then, for each port type, the first-level CSI includes the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type, and the second-level CSI includes reference signal resource indications of R reference signal resources corresponding to each port type, where R is a positive integer greater than or equal to 1 and less than or equal to K.

[0481] When the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported among multiple reference signal resources is at most K, the first-level CSI includes the total number of reference signal resource indications to be reported, and the second-level CSI includes the reference signal resource indications of R reference signal resources.

[0482] In some embodiments, the CSI reporting configuration information is further used to indicate a reporting rank indication, where:

[0483] When the CSI reporting mode is the secondary reporting mode, the first-level CSI also includes M rank indicators; M is a positive integer greater than or equal to 1 and less than or equal to K;

[0484] When the CSI reporting mode is a three-level reporting mode, the second-level CSI further includes M rank indicators.

[0485] In some embodiments, the processor is further configured to:

[0486] When the uplink resource allocated by the network device to the terminal is less than the uplink resource required for transmitting the CSI, determining the number of CSIs, where the number of CSIs is one or more;

[0487] Based on the number of CSIs, determine the target CSI in the CSIs;

[0488] In the target CSI, all or part of the information in the last level CSI is discarded;

[0489] Among them, when the CSI reporting mode is a two-level reporting mode, the last level CSI is the second-level CSI; when the CSI reporting mode is a three-level reporting mode, the last level CSI is the third-level CSI.

[0490] In some embodiments, determining a target CSI in the CSI based on the amount of CSI includes:

[0491] When the number of CSIs is one, the CSI is determined as the target CSI;

[0492] When there are multiple CSIs, the target CSI is determined among the multiple CSIs based on their priorities.

[0493] In some embodiments, in the target CSI, all or part of the information in the last level CSI is discarded, including:

[0494] determining a reference signal resource indication priority of each of the first number of reference signal resource indications included in the target CSI;

[0495] determining, based on the reference signal resource indication priority, a second number of target reference signal resource indications from the first number of reference signal resource indications, the second number being less than or equal to the first number;

[0496] Information corresponding to the second number of target reference signal resource indications in the last level of CSI is discarded.

[0497] In some embodiments, for each target reference signal resource indication, discarding information corresponding to a second number of target reference signal resource indications in the last level CSI includes:

[0498] Determine the bandwidth priority of wideband CSI, even subband CSI, and odd subband CSI, with the bandwidth priorities of wideband CSI, even subband CSI, and odd subband CSI decreasing in sequence; based on the bandwidth priority, discard all or part of the information corresponding to the target reference signal resource indication;

[0499] or,

[0500] Determine a PMI grouping priority corresponding to the target reference signal resource indication; and discard all or part of the information corresponding to the target reference signal resource indication based on the PMI grouping priority.

[0501] It should be noted here that the above-mentioned terminal provided in the embodiment of the present disclosure can implement all the method steps implemented by the method embodiment in which the execution subject is the terminal, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as those of the method embodiment will not be described in detail here.

[0502] FIG5 is a schematic diagram of the structure of a network device provided by an embodiment of the present disclosure. As shown in FIG5 , the network device includes a memory 520, a transceiver 500, and a processor 510, wherein:

[0503] The memory 520 is used to store computer programs; the transceiver 500 is used to send and receive data under the control of the processor 510; the processor 510 is used to read the computer program in the memory 520 and perform the following operations:

[0504] Send CSI reporting configuration information to the terminal, where the CSI reporting configuration information is associated with multiple reference signal resources;

[0505] Based on the CSI reporting configuration information, CSI sent by the terminal is received, where the CSI includes a first number of reference signal resource indicators, and the first number is at least two.

[0506] Specifically, the transceiver 500 is configured to receive and send data under the control of the processor 510 .

[0507] In FIG5 , the bus architecture may include any number of interconnected buses and bridges, specifically various circuits linked together by one or more processors represented by processor 510 and memory represented by memory 520. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver 500 may be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices over a transmission medium, such as a wireless channel, a wired channel, an optical cable, and the like. The processor 510 is responsible for managing the bus architecture and general processing, and the memory 520 may store data used by the processor 510 when performing operations.

[0508] Optionally, the processor 510 may be a CPU, an ASIC, an FPGA, or a CPLD, and the processor may also adopt a multi-core architecture.

[0509] The processor calls the computer program stored in the memory to execute any method provided by the embodiment of the present disclosure according to the obtained executable instructions. The processor and the memory can also be arranged physically separately.

[0510] In some embodiments, the CSI reporting configuration information is used to determine the CSI reporting mode and information of CSI at each level. Receiving CSI sent by the terminal based on the CSI reporting configuration information includes:

[0511] Based on the information of CSI at each level, the CSI sent by the terminal is received, wherein the CSI reporting method includes a secondary reporting method or a tertiary reporting method.

[0512] In some embodiments, the CSI reporting configuration information is used to indicate any of the following:

[0513] For each port type, the number of reference signal resource indicators to be reported in the reference signal resources corresponding to each port type is K;

[0514] The total number of reference signal resource indications to be reported among the multiple reference signal resources is K;

[0515] For each port type, the number of reference signal resource indicators to be reported in the reference signal resources corresponding to each port type is at most K;

[0516] The total number of reference signal resource indications to be reported among the multiple reference signal resources is at most K;

[0517] K is a positive integer greater than 1.

[0518] In some embodiments, when the CSI reporting configuration information indicates that for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is K, or when the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported in multiple reference signal resources is K, the CSI reporting mode is a secondary reporting mode;

[0519] When the CSI reporting configuration information indicates that for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is at most K, or when the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported in multiple reference signal resources is at most K, the CSI reporting mode is the secondary reporting mode or the tertiary reporting mode.

[0520] In some embodiments, the CSI reporting method is a secondary reporting method. For the first-level CSI in the secondary reporting method, any one of the following conditions is met:

[0521] When the CSI reporting configuration information indicates that, for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is K, then, for each port type, the first-level CSI includes reference signal resource indications of the K reference signal resources corresponding to each port type;

[0522] In a case where the total number of reference signal resource indications to be reported among multiple reference signal resources indicated in the CSI reporting configuration information is K, the first-level CSI includes reference signal resource indications of the K reference signal resources;

[0523] When the CSI reporting configuration information indicates that, for each port type, the number of reference signal resources corresponding to each port type and the number of reference signal resource indications to be reported are both at most K, then, for each port type, the first-level CSI includes, for each port type, reference signal resource indications of R reference signal resources corresponding to each port type, where R is a positive integer greater than or equal to 1 and less than or equal to K.

[0524] When the CSI reporting configuration information indicates multiple reference signal resources and the total number of reference signal resource indications to be reported is at most K, the first-level CSI includes reference signal resource indications of R reference signal resources.

[0525] In some embodiments, when the CSI reporting configuration information indicates that, for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is at most K, or indicates that the total number of reference signal resource indications to be reported in multiple reference signal resources is at most K, for the first level CSI, based on information of the CSI at each level, receiving the CSI sent by the terminal includes:

[0526] receiving, based on a bitmap, first-level CSI sent by the terminal, where the number of bits in the bitmap is determined based on the number of the plurality of reference signal resources;

[0527] and / or,

[0528] The first-level CSI sent by the terminal is received based on multiple information fields, where the number of the multiple information fields is determined based on the number of reference signal resource indicators included in the CSI.

[0529] In some embodiments, the CSI reporting method is a three-level reporting method. For the first-level CSI and the second-level CSI in the three-level reporting method, any one of the following conditions is met:

[0530] When the CSI reporting configuration information indicates that, for a port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is at most K, then, for each port type, the first-level CSI includes the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type, and the second-level CSI includes reference signal resource indications of R reference signal resources corresponding to each port type, where R is a positive integer greater than or equal to 1 and less than or equal to K.

[0531] When the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported among multiple reference signal resources is at most K, the first-level CSI includes the total number of reference signal resource indications to be reported, and the second-level CSI includes the reference signal resource indications of R reference signal resources.

[0532] In some embodiments, the CSI reporting configuration information is further used to indicate a reporting rank indication, where:

[0533] When the CSI reporting mode is the secondary reporting mode, the first-level CSI also includes M rank indicators; M is a positive integer greater than or equal to 1 and less than or equal to K;

[0534] When the CSI reporting mode is a three-level reporting mode, the second-level CSI further includes M rank indicators.

[0535] It should be noted here that the above-mentioned network device provided in the embodiment of the present disclosure can implement all the method steps implemented by the method embodiment in which the execution subject is the network device, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as those of the method embodiment will not be described in detail here.

[0536] FIG6 is a first structural diagram of a CSI reporting device provided in an embodiment of the present disclosure. As shown in FIG6 , the device includes:

[0537] A first receiving module 61 is configured to receive CSI reporting configuration information sent by a network device, where the CSI reporting configuration information is associated with multiple reference signal resources;

[0538] a measurement module 62, configured to measure a plurality of reference signal resources and obtain measurement results of each of the plurality of reference signal resources, the measurement results including a reference signal resource indication;

[0539] The first sending module 63 is configured to send CSI to the network device based on the CSI reporting configuration information and the measurement results of each of the multiple reference signal resources, where the CSI includes a first number of reference signal resource indications, and the first number is at least two.

[0540] In some embodiments, the first sending module 63 is specifically configured to:

[0541] Determine a CSI reporting mode based on the CSI reporting configuration information, where the CSI reporting mode includes a secondary reporting mode or a tertiary reporting mode;

[0542] Determine CSI information of each level from measurement results of multiple reference signal resources based on CSI reporting configuration information and CSI reporting mode;

[0543] Based on the information of CSI at each level, CSI is sent to the network device.

[0544] In some embodiments, the CSI reporting configuration information is used to indicate any of the following:

[0545] For each port type, the number of reference signal resource indicators to be reported in the reference signal resources corresponding to each port type is K;

[0546] The total number of reference signal resource indications to be reported among the multiple reference signal resources is K;

[0547] For each port type, the number of reference signal resource indicators to be reported in the reference signal resources corresponding to each port type is at most K;

[0548] The total number of reference signal resource indications to be reported among the multiple reference signal resources is at most K;

[0549] K is a positive integer greater than 1.

[0550] In some embodiments, when the CSI reporting configuration information indicates that for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is K, or when the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported in multiple reference signal resources is K, the CSI reporting mode is a secondary reporting mode;

[0551] When the CSI reporting configuration information indicates that for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is at most K, or when the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported in multiple reference signal resources is at most K, the CSI reporting mode is the secondary reporting mode or the tertiary reporting mode.

[0552] In some embodiments, the CSI reporting method is a secondary reporting method. For the first-level CSI in the secondary reporting method, any one of the following conditions is met:

[0553] When the CSI reporting configuration information indicates that, for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is K, then, for each port type, the first-level CSI includes reference signal resource indications of the K reference signal resources corresponding to each port type;

[0554] In a case where the total number of reference signal resource indications to be reported among multiple reference signal resources indicated in the CSI reporting configuration information is K, the first-level CSI includes reference signal resource indications of the K reference signal resources;

[0555] When the CSI reporting configuration information indicates that, for each port type, the number of reference signal resources corresponding to each port type and the number of reference signal resource indications to be reported are both at most K, then, for each port type, the first-level CSI includes, for each port type, reference signal resource indications of R reference signal resources corresponding to each port type, where R is a positive integer greater than or equal to 1 and less than or equal to K.

[0556] When the CSI reporting configuration information indicates multiple reference signal resources and the total number of reference signal resource indications to be reported is at most K, the first-level CSI includes reference signal resource indications of R reference signal resources.

[0557] In some embodiments, when the CSI reporting configuration information indicates that, for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is at most K, or when it indicates that the total number of reference signal resource indications to be reported in multiple reference signal resources is at most K, for the first-level CSI, the first sending module 63 is specifically configured to:

[0558] Sending the first level CSI to the network device based on a bitmap, where the number of bits in the bitmap is determined based on the number of the plurality of reference signal resources;

[0559] and / or,

[0560] The first level CSI is sent to the network device based on a plurality of information fields, where the number of the plurality of information fields is determined based on the number of reference signal resource indications included in the CSI.

[0561] In some embodiments, the CSI reporting method is a three-level reporting method. For the first-level CSI and the second-level CSI in the three-level reporting method, any one of the following conditions is met:

[0562] When the CSI reporting configuration information indicates that, for a port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is at most K, then, for each port type, the first-level CSI includes the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type, and the second-level CSI includes reference signal resource indications of R reference signal resources corresponding to each port type, where R is a positive integer greater than or equal to 1 and less than or equal to K.

[0563] When the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported among multiple reference signal resources is at most K, the first-level CSI includes the total number of reference signal resource indications to be reported, and the second-level CSI includes the reference signal resource indications of R reference signal resources.

[0564] In some embodiments, the CSI reporting configuration information is further used to indicate a reporting rank indication, where:

[0565] When the CSI reporting mode is the secondary reporting mode, the first-level CSI also includes M rank indicators; M is a positive integer greater than or equal to 1 and less than or equal to K;

[0566] When the CSI reporting mode is a three-level reporting mode, the second-level CSI further includes M rank indicators.

[0567] In some embodiments, the first sending module 63 is further configured to:

[0568] When the uplink resource allocated by the network device to the terminal is less than the uplink resource required for transmitting the CSI, determining the number of CSIs, where the number of CSIs is one or more;

[0569] Based on the number of CSIs, determine the target CSI in the CSIs;

[0570] In the target CSI, all or part of the information in the last level CSI is discarded;

[0571] Among them, when the CSI reporting mode is a two-level reporting mode, the last level CSI is the second-level CSI; when the CSI reporting mode is a three-level reporting mode, the last level CSI is the third-level CSI.

[0572] In some embodiments, the first sending module 63 is further configured to:

[0573] When the number of CSIs is one, the CSI is determined as the target CSI;

[0574] When there are multiple CSIs, the target CSI is determined among the multiple CSIs based on their priorities.

[0575] In some embodiments, the first sending module 63 is further configured to:

[0576] determining a reference signal resource indication priority of each of the first number of reference signal resource indications included in the target CSI;

[0577] determining, based on the reference signal resource indication priority, a second number of target reference signal resource indications from the first number of reference signal resource indications, the second number being less than or equal to the first number;

[0578] Information corresponding to the second number of target reference signal resource indications in the last level of CSI is discarded.

[0579] In some embodiments, for each target reference signal resource indication, the first sending module 63 is further configured to:

[0580] Determine the bandwidth priority of wideband CSI, even subband CSI, and odd subband CSI, with the bandwidth priorities of wideband CSI, even subband CSI, and odd subband CSI decreasing in sequence; based on the bandwidth priority, discard all or part of the information corresponding to the target reference signal resource indication;

[0581] or,

[0582] Determine a PMI grouping priority corresponding to the target reference signal resource indication; and discard all or part of the information corresponding to the target reference signal resource indication based on the PMI grouping priority.

[0583] Specifically, the CSI reporting device provided in the embodiment of the present disclosure can implement all the method steps implemented in the above-mentioned method embodiment in which the execution subject is the terminal, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as those of the method embodiment will not be described in detail here.

[0584] FIG7 is a second structural diagram of a CSI reporting device provided in an embodiment of the present disclosure. As shown in FIG7 , the device includes:

[0585] A second sending module 71 is configured to send CSI reporting configuration information to a terminal, where the CSI reporting configuration information is associated with multiple reference signal resources;

[0586] The second receiving module 72 is configured to receive CSI sent by the terminal based on the CSI reporting configuration information, where the CSI includes a first number of reference signal resource indicators, where the first number is at least two.

[0587] In some embodiments, the CSI reporting configuration information is used to determine the CSI reporting mode and information of CSI at each level. The second receiving module 72 is specifically configured to:

[0588] Based on the information of CSI at each level, the CSI sent by the terminal is received, wherein the CSI reporting method includes a secondary reporting method or a tertiary reporting method.

[0589] In some embodiments, the CSI reporting configuration information is used to indicate any of the following:

[0590] For each port type, the number of reference signal resource indicators to be reported in the reference signal resources corresponding to each port type is K;

[0591] The total number of reference signal resource indications to be reported among the multiple reference signal resources is K;

[0592] For each port type, the number of reference signal resource indicators to be reported in the reference signal resources corresponding to each port type is at most K;

[0593] The total number of reference signal resource indications to be reported in the multiple reference signal resources is at most K;

[0594] The number of reference signal resource indicators to be reported is at most K;

[0595] K is a positive integer greater than 1.

[0596] In some embodiments, when the CSI reporting configuration information indicates that for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is K, or when the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported in multiple reference signal resources is K, the CSI reporting mode is a secondary reporting mode;

[0597] When the CSI reporting configuration information indicates that for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is at most K, or when the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported in multiple reference signal resources is at most K, the CSI reporting mode is the secondary reporting mode or the tertiary reporting mode.

[0598] In some embodiments, the CSI reporting method is a secondary reporting method. For the first-level CSI in the secondary reporting method, any one of the following conditions is met:

[0599] When the CSI reporting configuration information indicates that, for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is K, then, for each port type, the first-level CSI includes reference signal resource indications of the K reference signal resources corresponding to each port type;

[0600] In a case where the total number of reference signal resource indications to be reported among multiple reference signal resources indicated in the CSI reporting configuration information is K, the first-level CSI includes reference signal resource indications of the K reference signal resources;

[0601] When the CSI reporting configuration information indicates that, for each port type, the number of reference signal resources corresponding to each port type and the number of reference signal resource indications to be reported are both at most K, then, for each port type, the first-level CSI includes, for each port type, reference signal resource indications of R reference signal resources corresponding to each port type, where R is a positive integer greater than or equal to 1 and less than or equal to K.

[0602] When the CSI reporting configuration information indicates multiple reference signal resources and the total number of reference signal resource indications to be reported is at most K, the first-level CSI includes reference signal resource indications of R reference signal resources.

[0603] In some embodiments, when the CSI reporting configuration information indicates that, for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is at most K, or when it indicates that the total number of reference signal resource indications to be reported in multiple reference signal resources is at most K, for the first-level CSI, the second receiving module 72 is specifically configured to:

[0604] receiving, based on a bitmap, first-level CSI sent by the terminal, where the number of bits in the bitmap is determined based on the number of the plurality of reference signal resources;

[0605] and / or,

[0606] The first-level CSI sent by the terminal is received based on multiple information fields, where the number of the multiple information fields is determined based on the number of reference signal resource indicators included in the CSI.

[0607] In some embodiments, the CSI reporting method is a three-level reporting method. For the first-level CSI and the second-level CSI in the three-level reporting method, any one of the following conditions is met:

[0608] When the CSI reporting configuration information indicates that, for a port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type is at most K, then, for each port type, the first-level CSI includes the number of reference signal resource indications to be reported in the reference signal resources corresponding to each port type, and the second-level CSI includes reference signal resource indications of R reference signal resources corresponding to each port type, where R is a positive integer greater than or equal to 1 and less than or equal to K.

[0609] When the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported among multiple reference signal resources is at most K, the first-level CSI includes the total number of reference signal resource indications to be reported, and the second-level CSI includes the reference signal resource indications of R reference signal resources.

[0610] In some embodiments, the CSI reporting configuration information is further used to indicate a reporting rank indication, where:

[0611] When the CSI reporting mode is the secondary reporting mode, the first-level CSI also includes M rank indicators; M is a positive integer greater than or equal to 1 and less than or equal to K;

[0612] When the CSI reporting mode is a three-level reporting mode, the second-level CSI further includes M rank indicators.

[0613] Specifically, the CSI reporting device provided in the embodiment of the present disclosure can implement all the method steps implemented in the above-mentioned method embodiment in which the execution subject is a network device, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as those of the method embodiment will not be described in detail here.

[0614] It should be noted that the division of units / modules in the above-mentioned embodiments of the present disclosure is schematic and is merely a logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional units in the various embodiments of the present disclosure may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The above-mentioned integrated units may be implemented in the form of hardware or software functional units.

[0615] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the relevant technology or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) or a processor to execute all or part of the steps of the various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, etc. Various media that can store program codes.

[0616] In some embodiments, a computer-readable storage medium is further provided. The computer-readable storage medium stores a computer program, and the computer program is used to enable a computer to execute the CSI reporting method provided by the above-mentioned method embodiments.

[0617] Specifically, the above-mentioned computer-readable storage medium provided by the embodiment of the present disclosure can implement all the method steps implemented by the above-mentioned method embodiments, and can achieve the same technical effects. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0618] It should be noted that computer-readable storage media can be any available media or data storage devices that can be accessed by the processor, including but not limited to magnetic storage (such as floppy disks, hard disks, magnetic tapes, magneto-optical disks (MO), etc.), optical storage (such as CDs, DVDs, BDs, HVDs, etc.), and semiconductor storage (such as ROMs, EPROMs, EEPROMs, non-volatile memories (NAND FLASH), solid-state drives (SSDs), etc.).

[0619] It should also be noted that the terms "first," "second," and the like in the embodiments of the present disclosure are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present disclosure can be implemented in an order other than that illustrated or described herein. Furthermore, the terms "first" and "second" generally distinguish objects of the same type, and do not limit the number of objects. For example, the first object can be one or more.

[0620] In the embodiments of the present disclosure, the term "and / or" describes the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0621] In the embodiments of the present disclosure, the term "plurality" refers to two or more than two, and other quantifiers are similar thereto.

[0622] The technical solution provided by the embodiments of the present disclosure can be applicable to a variety of systems, especially 5G systems. For example, applicable systems may be global system of mobile communication (GSM) systems, code division multiple access (CDMA) systems, wideband code division multiple access (WCDMA) GPRS systems, LTE systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, advanced long term evolution (LTE-A) systems, universal mobile telecommunication systems (UMTS), worldwide interoperability for microwave access (WiMAX) systems, 5G NR systems, etc. These various systems include terminal devices and network equipment. The system may also include a core network part, such as an evolved packet system (EPS), a 5G system (5GS), etc.

[0623] The terminal device involved in the embodiments of the present disclosure may be a device that provides voice and / or data connectivity to a user, a handheld device with wireless connection function, or other processing device connected to a wireless modem. In different systems, the name of the terminal device may also be different. For example, in a 5G system, the terminal device may be called User Equipment (UE). A wireless terminal device can communicate with one or more core networks (CN) via a RAN. The wireless terminal device may be a mobile terminal device, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal device. For example, it may be a portable, pocket-sized, handheld, computer-built-in or vehicle-mounted mobile device that exchanges voice and / or data with a wireless access network. For example, a Personal Communication Service (PCS) phone, a cordless phone, a Session Initiated Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), and other devices. The wireless terminal device may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, an access point, a remote terminal device, an access terminal device, a user terminal device, a user agent, or a user device, but is not limited in the embodiments of the present disclosure.

[0624] The network device involved in the embodiments of the present disclosure may be a base station, which may include multiple cells providing services to terminals. Depending on the specific application scenario, the base station may also be called an access point, or may be a device in an access network that communicates with a wireless terminal device via one or more sectors on an air interface, or may be called another name. The network device may be used to interchange received air frames with IP packets, acting as a router between the wireless terminal device and the rest of the access network, which may include an IP communication network. The network device may also coordinate attribute management of the air interface. For example, the network device involved in the embodiments of the present disclosure may be a network device (Base Transceiver Station, BTS) in the Global System for Mobile communications (GSM) or Code Division Multiple Access (CDMA), or a network device (NodeB) in Wide-band Code Division Multiple Access (WCDMA), or an evolutionary network device (eNB or e-NodeB) in the LTE system, a 5G base station (gNB) in the 5G network architecture (next generation system), or a home evolved Node B (HeNB), a relay node, a femto, a pico, etc., which is not limited in the embodiments of the present disclosure. In some network structures, the network devices may include CU nodes and DU nodes, and the centralized unit and the distributed unit may also be geographically separated.

[0625] Network devices and terminal devices can each use one or more antennas for Multiple Input Multiple Output (MIMO) transmission. MIMO transmission can be single-user MIMO (SU-MIMO) or multi-user MIMO (MU-MIMO). Depending on the form and number of antenna combinations, MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO, or massive-MIMO. It can also use diversity transmission, precoding transmission, or beamforming transmission.

[0626] Those skilled in the art will appreciate that the embodiments of the present disclosure may be provided as methods, systems, or computer program products. Therefore, the present disclosure may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present disclosure may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage and optical storage, etc.) containing computer-usable program code.

[0627] The present disclosure is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present disclosure. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer-executable instructions. These computer-executable instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0628] These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the processor-readable memory produce a 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.

[0629] These processor-executable instructions may also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, whereby the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0630] Obviously, those skilled in the art may make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is intended to include these modifications and variations.

Claims

1. A method for reporting channel state information (CSI), applied to a terminal, the method comprising: Receiving CSI reporting configuration information sent by a network device, where the CSI reporting configuration information is associated with multiple reference signal resources; Measuring the multiple reference signal resources to obtain measurement results of the multiple reference signal resources respectively, where the measurement results include reference signal resource indications; Based on the CSI reporting configuration information and the measurement results of the multiple reference signal resources respectively, sending CSI to the network device, where the CSI includes a first number of reference signal resource indications, and the first number is at least two.

2. The method according to claim 1, wherein, The sending CSI to the network device based on the CSI reporting configuration information and the measurement results of the multiple reference signal resources respectively includes: Determining a CSI reporting manner based on the CSI reporting configuration information, where the CSI reporting manner includes a two-level reporting manner or a three-level reporting manner; Based on the CSI reporting configuration information and the CSI reporting manner, determining information of each level of CSI from the measurement results of the multiple reference signal resources respectively; Based on the information of each level of CSI, sending the CSI to the network device.

3. The method according to claim 2, wherein, The CSI reporting configuration information is used to indicate any one of the following: For each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to the port type is K; The total number of reference signal resource indications to be reported in the multiple reference signal resources is K; For each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to the port type is at most K; The total number of reference signal resource indications to be reported in the multiple reference signal resources is at most K; K is a positive integer greater than 1.

4. The method according to claim 3, wherein When the CSI reporting configuration information indicates that for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to the port type is K, or when the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported in the multiple reference signal resources is K, the CSI reporting manner is the two-level reporting manner; When the CSI reporting configuration information indicates that for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to the port type is at most K, or when the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported in the multiple reference signal resources is at most K, the CSI reporting manner is the two-level reporting manner or the three-level reporting manner.

5. The method according to claim 3, wherein For the first-level CSI in the two-level reporting manner, the CSI reporting manner being the two-level reporting manner satisfies any one of the following: When the CSI reporting configuration information indicates that for each port type, the number of reference signal resources to be reported among the reference signal resources corresponding to each port type is K, for each port type, the first-level CSI includes the reference signal resource indications of K reference signal resources corresponding to the port type respectively; When the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported among the multiple reference signal resources is K, the first-level CSI includes the reference signal resource indications of K reference signal resources; When the CSI reporting configuration information indicates that for each port type, the number of reference signal resources to be reported among the reference signal resources corresponding to each port type is at most K, for each port type, the first-level CSI includes the reference signal resource indications of R reference signal resources corresponding to the port type respectively, where R is a positive integer greater than or equal to 1 and less than or equal to K; When the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported among the multiple reference signal resources is at most K, the first-level CSI includes the reference signal resource indications of R reference signal resources; 6. The method according to claim 5, wherein When the CSI reporting configuration information indicates that for each port type, the number of reference signal resources to be reported among the reference signal resources corresponding to each port type is at most K, or indicates that the total number of reference signal resource indications to be reported among the multiple reference signal resources is at most K, for the first-level CSI, sending the CSI to the network device based on the information of each level of CSI includes: Sending the first-level CSI to the network device based on a bit map, where the number of bits of the bit map is determined based on the number of the multiple reference signal resources; and / or Sending the first-level CSI to the network device based on multiple information fields, where the number of the multiple information fields is determined based on the number of reference signal resource indications included in the CSI.

7. The method according to claim 3, wherein The CSI reporting mode is the three-level reporting mode. For the first-level CSI and the second-level CSI in the three-level reporting mode, any one of the following is satisfied: When the CSI reporting configuration information indicates that for a port type, the number of reference signal resources to be reported among the reference signal resources corresponding to the port type is at most K, for each port type, the first-level CSI includes the number of reference signal resources to be reported among the reference signal resources corresponding to the port type respectively, and the second-level CSI includes the reference signal resource indications of R reference signal resources corresponding to the port type respectively, where R is a positive integer greater than or equal to 1 and less than or equal to K; When the total number of reference signal resource indications to be reported in the CSI reporting configuration information indicating the multiple reference signal resources is at most K, the first-level CSI includes the total number of reference signal resource indications to be reported, and the second-level CSI includes the reference signal resource indications of R reference signal resources.

8. The method according to any one of claims 5-7, wherein The CSI reporting configuration information is further used to indicate a reporting rank indication, where: When the CSI reporting mode is the two-level reporting mode, the first-level CSI further includes M rank indications; M is a positive integer greater than or equal to 1 and less than or equal to K; When the CSI reporting mode is the three-level reporting mode, the second-level CSI further includes M rank indications.

9. The method according to any one of claims 2-7, wherein, The method further includes: When the uplink resources allocated by the network device for the terminal are less than the uplink resources required to transmit the CSI, determining the number of CSIs, where the number of CSIs is one or more; Based on the number of CSIs, determining a target CSI among the CSIs; In the target CSI, discarding all or part of the information in the last-level CSI; Among them, when the CSI reporting mode is the two-level reporting mode, the last-level CSI is the second-level CSI; when the CSI reporting mode is the three-level reporting mode, the last-level CSI is the third-level CSI.

10. The method according to claim 9, wherein, The determining the target CSI among the CSIs based on the number of CSIs includes: When the number of CSIs is one, determining the CSI as the target CSI; When the number of CSIs is multiple, determining the target CSI among the multiple CSIs based on the priorities of the multiple CSIs.

11. The method according to claim 9, wherein, The discarding all or part of the information in the last-level CSI in the target CSI includes: Determining the reference signal resource indication priorities of the first number of reference signal resource indications included in the target CSI; Based on the reference signal resource indication priorities, determining a second number of target reference signal resource indications among the first number of reference signal resource indications, where the second number is less than or equal to the first number; Discarding the information corresponding to the second number of target reference signal resource indications in the last-level CSI.

12. The method according to claim 11, wherein, For each target reference signal resource indication, the discarding the information corresponding to the second number of target reference signal resource indications in the last-level CSI includes: Determining the bandwidth priorities of the wideband CSI, the even sub-band CSI, and the odd sub-band CSI, where the bandwidth priorities of the wideband CSI, the even sub-band CSI, and the odd sub-band CSI decrease in sequence; based on the bandwidth priorities, discarding all or part of the information corresponding to the target reference signal resource indication; Or, Determining the precoding matrix indication (PMI) group priority corresponding to the target reference signal resource indication; based on the PMI group priority, discarding all or part of the information corresponding to the target reference signal resource indication.

13. A method for reporting channel state information (CSI), applied to a network device, the method comprising: Sending CSI reporting configuration information to a terminal, the CSI reporting configuration information being associated with a plurality of reference signal resources; Receiving, based on the CSI reporting configuration information, the CSI sent by the terminal, the CSI including a first number of reference signal resource indications, the first number being at least two.

14. The method according to claim 13, wherein The CSI reporting configuration information is used to determine a CSI reporting manner and information of each level of CSI. The receiving, based on the CSI reporting configuration information, the CSI sent by the terminal includes: Receiving, based on the information of each level of CSI, the CSI sent by the terminal, wherein the CSI reporting manner includes a two-level reporting manner or a three-level reporting manner.

15. The method according to claim 14, wherein, The CSI reporting configuration information is used to indicate any one of the following: For each port type, the number of reference signal resource indications to be reported among the reference signal resources corresponding to the port type is K; The total number of reference signal resource indications to be reported among the plurality of reference signal resources is K; For each port type, the number of reference signal resource indications to be reported among the reference signal resources corresponding to the port type is at most K; The total number of reference signal resource indications to be reported among the plurality of reference signal resources is at most K; K is a positive integer greater than 1.

16. The method according to claim 15, wherein When the CSI reporting configuration information indicates that for each port type, the number of reference signal resource indications to be reported among the reference signal resources corresponding to the port type is K, or the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported among the plurality of reference signal resources is K, the CSI reporting manner is the two-level reporting manner; When the CSI reporting configuration information indicates that for each port type, the number of reference signal resource indications to be reported among the reference signal resources corresponding to the port type is at most K, or the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported among the plurality of reference signal resources is at most K, the CSI reporting manner is the two-level reporting manner or the three-level reporting manner.

17. The method according to claim 15, wherein The CSI reporting manner is the two-level reporting manner. For the first-level CSI in the two-level reporting manner, any one of the following is satisfied: When the CSI reporting configuration information indicates that for each port type, the number of reference signal resource indications to be reported among the reference signal resources corresponding to the port type is K, for each port type, the first-level CSI includes the reference signal resource indications of the K reference signal resources corresponding to the port type respectively; When the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported among the plurality of reference signal resources is K, the first-level CSI includes the reference signal resource indications of K reference signal resources; When the CSI reporting configuration information indicates that for each port type, the number of reference signal resources to be reported among the reference signal resources corresponding to each port type is at most K, for each port type, the first-level CSI includes reference signal resource indications of R reference signal resources respectively corresponding to the port type, where R is a positive integer greater than or equal to 1 and less than or equal to K; When the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported among the multiple reference signal resources is at most K, the first-level CSI includes reference signal resource indications of R reference signal resources.

18. The method according to claim 17, wherein When the CSI reporting configuration information indicates that for each port type, the number of reference signal resources to be reported among the reference signal resources corresponding to each port type is at most K, or indicates that the total number of reference signal resource indications to be reported among the multiple reference signal resources is at most K, for the first-level CSI, receiving the CSI sent by the terminal based on the information of each level of CSI includes: Receiving the first-level CSI sent by the terminal based on a bitmap, where the number of bits of the bitmap is determined based on the number of the multiple reference signal resources; And / or, Receiving the first-level CSI sent by the terminal based on multiple information fields, where the number of the multiple information fields is determined based on the number of reference signal resource indications included in the CSI.

19. The method according to claim 15, wherein, The CSI reporting method is the three-level reporting method. For the first-level CSI and the second-level CSI in the three-level reporting method, any one of the following is satisfied: When the CSI reporting configuration information indicates that for a port type, the number of reference signal resources to be reported among the reference signal resources corresponding to the port type is at most K, for each port type, the first-level CSI includes the number of reference signal resources to be reported among the reference signal resources corresponding to each port type, and the second-level CSI includes reference signal resource indications of R reference signal resources respectively corresponding to the port type, where R is a positive integer greater than or equal to 1 and less than or equal to K; When the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported among the multiple reference signal resources is at most K, the first-level CSI includes the total number of reference signal resource indications to be reported, and the second-level CSI includes reference signal resource indications of R reference signal resources.

20. The method according to any one of claims 17 - 19, wherein The CSI reporting configuration information is further used to indicate reporting of a rank indication, where: When the CSI reporting method is the two-level reporting method, the first-level CSI further includes M rank indications; M is a positive integer greater than or equal to 1 and less than or equal to K; When the CSI reporting method is the three-level reporting method, the second-level CSI further includes M rank indications.

21. A terminal, including a memory, a transceiver, and a processor; The memory is used to store a computer program; A transceiver for transmitting and receiving data under the control of the processor; A processor for reading a computer program in the memory and performing the following operations: Receiving channel state information CSI reporting configuration information sent by a network device, where the CSI reporting configuration information is associated with multiple reference signal resources; Measuring the multiple reference signal resources to obtain measurement results of each of the multiple reference signal resources, where the measurement results include reference signal resource indications; Based on the CSI reporting configuration information and the measurement results of each of the multiple reference signal resources, sending CSI to the network device, where the CSI includes a first number of reference signal resource indications, and the first number is at least two.

22. The terminal according to claim 21, wherein, The sending CSI to the network device based on the CSI reporting configuration information and the measurement results of each of the multiple reference signal resources includes: Determining a CSI reporting method based on the CSI reporting configuration information, where the CSI reporting method includes a two-level reporting method or a three-level reporting method; Based on the CSI reporting configuration information and the CSI reporting method, determining information of each level of CSI in the measurement results of each of the multiple reference signal resources; Sending the CSI to the network device based on the information of each level of CSI.

23. The terminal according to claim 22, wherein, The CSI reporting configuration information is used to indicate any one of the following: For each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to the port type is K; The total number of reference signal resource indications to be reported in the multiple reference signal resources is K; For each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to the port type is at most K; The total number of reference signal resource indications to be reported in the multiple reference signal resources is at most K; K is a positive integer greater than 1.

24. The terminal according to claim 23, wherein, When the CSI reporting configuration information indicates that for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to the port type is K, or when the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported in the multiple reference signal resources is K, the CSI reporting method is the two-level reporting method; When the CSI reporting configuration information indicates that for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to the port type is at most K, or when the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported in the multiple reference signal resources is at most K, the CSI reporting method is the two-level reporting method or the three-level reporting method.

25. The terminal according to claim 23, wherein, The CSI reporting method is the two-level reporting method. For the first-level CSI in the two-level reporting method, any one of the following is satisfied: When the CSI reporting configuration information indicates that for each port type, the number of reference signal resources to be reported among the reference signal resources corresponding to each port type is K, for each port type, the first-level CSI includes the reference signal resource indications of K reference signal resources corresponding to the port type respectively; When the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported among the multiple reference signal resources is K, the first-level CSI includes the reference signal resource indications of K reference signal resources; When the CSI reporting configuration information indicates that for each port type, the number of reference signal resources to be reported among the reference signal resources corresponding to each port type is at most K, for each port type, the first-level CSI includes the reference signal resource indications of R reference signal resources corresponding to the port type respectively, where R is a positive integer greater than or equal to 1 and less than or equal to K; When the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported among the multiple reference signal resources is at most K, the first-level CSI includes the reference signal resource indications of R reference signal resources; 26. The terminal according to claim 25, wherein, When the CSI reporting configuration information indicates that for each port type, the number of reference signal resources to be reported among the reference signal resources corresponding to each port type is at most K, or indicates that the total number of reference signal resource indications to be reported among the multiple reference signal resources is at most K, for the first-level CSI, the sending of the CSI to the network device based on the information of each level of CSI includes: Sending the first-level CSI to the network device based on a bitmap, where the number of bits of the bitmap is determined based on the number of the multiple reference signal resources; and / or Sending the first-level CSI to the network device based on multiple information fields, where the number of the multiple information fields is determined based on the number of reference signal resource indications included in the CSI.

27. The terminal according to claim 23, wherein, The CSI reporting method is the three-level reporting method. For the first-level CSI and the second-level CSI in the three-level reporting method, any of the following is satisfied: When the CSI reporting configuration information indicates that for a port type, the number of reference signal resources to be reported among the reference signal resources corresponding to the port type is at most K, for each port type, the first-level CSI includes the number of reference signal resources to be reported among the reference signal resources corresponding to the port type respectively, and the second-level CSI includes the reference signal resource indications of R reference signal resources corresponding to the port type respectively, where R is a positive integer greater than or equal to 1 and less than or equal to K; When the total number of reference signal resource indications to be reported, as indicated by the CSI reporting configuration information, in the multiple reference signal resources is at most K, the first-level CSI includes the total number of reference signal resource indications to be reported, and the second-level CSI includes reference signal resource indications of R reference signal resources.

28. The terminal according to any one of claims 25-27, wherein, The CSI reporting configuration information is further used to indicate a reporting rank indication, where: When the CSI reporting mode is the two-level reporting mode, the first-level CSI further includes M rank indications; M is a positive integer greater than or equal to 1 and less than or equal to K; When the CSI reporting mode is the three-level reporting mode, the second-level CSI further includes M rank indications.

29. The terminal according to any one of claims 22-27, wherein, The processor is further configured to: When the uplink resource allocated by the network device for the terminal is less than the uplink resource required to transmit the CSI, determine the number of CSIs, where the number of CSIs is one or more; Based on the number of CSIs, determine a target CSI among the CSIs; In the target CSI, discard all or part of the information in the last-level CSI; Wherein, when the CSI reporting mode is the two-level reporting mode, the last-level CSI is the second-level CSI; when the CSI reporting mode is the three-level reporting mode, the last-level CSI is the third-level CSI.

30. The terminal according to claim 29, wherein, The determining the target CSI among the CSIs based on the number of CSIs includes: When the number of CSIs is one, determining the CSI as the target CSI; When the number of CSIs is multiple, determining the target CSI among the multiple CSIs based on the priorities of the multiple CSIs.

31. The terminal according to claim 29, wherein, The discarding all or part of the information in the last-level CSI in the target CSI includes: Determining the reference signal resource indication priorities of the first number of reference signal resource indications included in the target CSI; Based on the reference signal resource indication priorities, determining a second number of target reference signal resource indications among the first number of reference signal resource indications, where the second number is less than or equal to the first number; Discarding the information corresponding to the second number of target reference signal resource indications in the last-level CSI.

32. The terminal according to claim 31, wherein, For each target reference signal resource indication, the discarding the information corresponding to the second number of target reference signal resource indications in the last-level CSI includes: Determining the bandwidth priorities of the wideband CSI, the even sub-band CSI, and the odd sub-band CSI, where the bandwidth priorities of the wideband CSI, the even sub-band CSI, and the odd sub-band CSI decrease in sequence; based on the bandwidth priorities, discarding all or part of the information corresponding to the target reference signal resource indication; Or, Determining the PMI group priority corresponding to the target reference signal resource indication; based on the PMI group priority, discarding all or part of the information corresponding to the target reference signal resource indication.

33. A network device, including a memory, a transceiver, and a processor; A memory for storing a computer program; A transceiver for transmitting and receiving data under the control of the processor; A processor for reading the computer program in the memory and performing the following operations: Sending channel state information CSI reporting configuration information to a terminal, where the CSI reporting configuration information is associated with multiple reference signal resources; Receiving CSI sent by the terminal based on the CSI reporting configuration information, where the CSI includes a first number of reference signal resource indications, and the first number is at least two.

34. The network device according to claim 33, wherein, The CSI reporting configuration information is used to determine a CSI reporting method and information of each level of CSI. The receiving the CSI sent by the terminal based on the CSI reporting configuration information includes: Receiving the CSI sent by the terminal based on the information of each level of CSI, where the CSI reporting method includes a two-level reporting method or a three-level reporting method.

35. The network device according to claim 34, wherein, The CSI reporting configuration information is used to indicate any one of the following: For each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to the port type is K; The total number of reference signal resource indications to be reported in the multiple reference signal resources is K; For each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to the port type is at most K; The total number of reference signal resource indications to be reported in the multiple reference signal resources is at most K; K is a positive integer greater than 1.

36. The network device according to claim 35, wherein When the CSI reporting configuration information indicates that for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to the port type is K, or when the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported in the multiple reference signal resources is K, the CSI reporting method is the two-level reporting method; When the CSI reporting configuration information indicates that for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to the port type is at most K, or when the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported in the multiple reference signal resources is at most K, the CSI reporting method is the two-level reporting method or the three-level reporting method.

37. The network device according to claim 35, wherein, The CSI reporting method is the two-level reporting method. For the first-level CSI in the two-level reporting method, any one of the following is satisfied: When the CSI reporting configuration information indicates that for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to the port type is K, for each port type, the first-level CSI includes the reference signal resource indications of the K reference signal resources corresponding to the port type respectively; When the total number of reference signal resource indications to be reported in the CSI reporting configuration information for the multiple reference signal resources is K, the first-level CSI includes the reference signal resource indications for K reference signal resources; When the CSI reporting configuration information indicates that for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to the port type is at most K, for each port type, the first-level CSI includes the reference signal resource indications for R reference signal resources corresponding to the port type respectively, where R is a positive integer greater than or equal to 1 and less than or equal to K; When the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported in the multiple reference signal resources is at most K, the first-level CSI includes the reference signal resource indications for R reference signal resources.

38. The network device according to claim 37, wherein, When the CSI reporting configuration information indicates that for each port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to the port type is at most K, or indicates that the total number of reference signal resource indications to be reported in the multiple reference signal resources is at most K, for the first-level CSI, receiving the CSI sent by the terminal based on the information of each level of CSI includes: Receiving the first-level CSI sent by the terminal based on a bitmap, where the number of bits of the bitmap is determined based on the number of the multiple reference signal resources; and / or Receiving the first-level CSI sent by the terminal based on multiple information fields, where the number of the multiple information fields is determined based on the number of reference signal resource indications included in the CSI.

39. The network device according to claim 35, wherein, The CSI reporting method is the three-level reporting method. For the first-level CSI and the second-level CSI in the three-level reporting method, any one of the following is satisfied: When the CSI reporting configuration information indicates that for a port type, the number of reference signal resource indications to be reported in the reference signal resources corresponding to the port type is at most K, for each port type, the first-level CSI includes the number of reference signal resource indications to be reported in the reference signal resources corresponding to the port type respectively, and the second-level CSI includes the reference signal resource indications for R reference signal resources corresponding to the port type respectively, where R is a positive integer greater than or equal to 1 and less than or equal to K; When the CSI reporting configuration information indicates that the total number of reference signal resource indications to be reported in the multiple reference signal resources is at most K, the first-level CSI includes the total number of reference signal resource indications to be reported, and the second-level CSI includes the reference signal resource indications for R reference signal resources.

40. The network device according to any one of claims 37-39, wherein, The CSI reporting configuration information is further used to indicate reporting a rank indication, where: When the CSI reporting method is the two-level reporting method, the first-level CSI further includes M rank indications; M is a positive integer greater than or equal to 1 and less than or equal to K; When the CSI reporting mode is the three - level reporting mode, the second - level CSI further includes M rank indicators.

41. A channel state information (CSI) reporting apparatus, applied to a terminal, the apparatus includes: A first receiving module, configured to receive CSI reporting configuration information sent by a network device, where the CSI reporting configuration information is associated with a plurality of reference signal resources; A measuring module, configured to measure the plurality of reference signal resources to obtain measurement results of the plurality of reference signal resources respectively, where the measurement results include reference signal resource indicators; A first sending module, configured to send CSI to the network device based on the CSI reporting configuration information and the measurement results of the plurality of reference signal resources respectively, where the CSI includes a first number of reference signal resource indicators, and the first number is at least two.

42. A channel state information (CSI) reporting apparatus, applied to a network device, the apparatus includes: A second sending module, configured to send CSI reporting configuration information to a terminal, where the CSI reporting configuration information is associated with a plurality of reference signal resources; A second receiving module, configured to receive CSI sent by the terminal based on the CSI reporting configuration information, where the CSI includes a first number of reference signal resource indicators, and the first number is at least two.

43. A processor - readable storage medium, where the processor - readable storage medium stores a computer program, and the computer program is used to cause a computer to execute the channel state information (CSI) reporting method according to any one of claims 1 to 12, or the computer program is used to cause a computer to execute the channel state information (CSI) reporting method according to any one of claims 13 to 20.

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