# US 12,009,893 B2 · Methods and devices for reporting and processing channel state information, and storage medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,009,893 B2 - Document ID: US12009893B2 - Status: Granted - Kind: B2 - Application number: 17/266,740 - Filed: 2019-08-12 - Published: 2021-10-07 - Granted: 2024-06-11 - Earliest claimed: 2018-08-10 - Assignees: Zte Corporation - Applicants: Zte Corporation - Inventors: Yong Li; Hao Wu; Yu Ngok Li; Zhaohua Lu; Yijian Chen - Web page: https://patentgrep.com/patent/US12009893B2 ## CPC - H04B 7/0626: {Channel coefficients, e.g. channel state information [CSI]} - H04B 7/0641: {Differential feedback} - H04B 7/0456: Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting - H04B 7/0632: {Channel quality parameters, e.g. channel quality indicator [CQI]} - H04B 7/0634: {Antenna weights or vector/matrix coefficients} - H04B 7/0658: {Feedback reduction} - H04B 7/066: {Combined feedback for a number of channels, e.g. over several subcarriers like in orthogonal frequency division multiplexing [OFDM]} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04L 25/0204: {of multiple channels} - H04L 25/0228: {with direct estimation from sounding signals} - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract Provided are a method and device for reporting channel state information (CSI), a method and device for processing channel state information, and a storage medium. The method for reporting channel state information includes: dividing M subbands to be reported into two sets; determining a relative value between CSI of each subband in a second set and CSI of a reference subband corresponding to the each subband in the second set; and reporting CSI of each subband in a first set and the relative value of the each subband in the second set to a base station. ## Claims ### Claim 1 A method for reporting channel state information (CSI), comprising: dividing M subbands to be reported into two sets, wherein a first set comprises N of the M subbands, M is a positive integer greater than 1, N is a positive integer greater than or equal to 1, and M−N≥1; determining a relative value between CSI of each subband in a second set and CSI of a reference subband corresponding to the each subband in the second set; and reporting CSI of each subband in the first set and the relative value of the each subband in the second set to a base station; wherein dividing the M subbands to be reported into two sets comprises: calculating a channel quality indicator (CQI) value of each of the M subbands; selecting first N subbands having CQI values from high to low as subbands in the first set; and using remaining subbands among the M subbands other than the N subbands as subbands in the second set. ### Claim 2 (depends on 1) The method of claim 1, wherein the CSI comprises at least one of: a coefficient of a vector participating in forming precoding, a phase of the coefficient, or an amplitude of the coefficient. ### Claim 3 (depends on 1) The method of claim 1, wherein the reference subband corresponding to the each subband in the second set comprises at least one subband in the first set. ### Claim 4 (depends on 1) The method of claim 1, wherein the reference subband corresponding to the each subband in the second set comprises at least one subband in the first set or a subband adjacent to the each subband in the second set, wherein a reference subband of at least one subband in the second set is at least one subband in the first set. ### Claim 5 (depends on 1) The method of claim 1, wherein the first set comprises at least one of: a subband with a lowest frequency among the M subbands; a subband with a highest frequency among the M subbands; or a subband with a middle frequency among the M subbands, wherein a difference between a sequence number of the subband with the middle frequency and a sequence number of the subband with a lowest frequency among the M subbands is D1, a difference between the sequence number of the subband with the middle frequency and a sequence number of the subband with a highest frequency among the M subbands is D2, and an absolute value of a difference between D1 and D2 does not exceed 1. ### Claim 6 (depends on 1) The method of claim 1, wherein the relative value is a product of a numerical value of the relative value and a product factor of the relative value, wherein the product factor is a physical quantity having a direction. ### Claim 7 (depends on 6) The method of claim 6, further comprising: determining the product factor according to the CSI of the each subband in the first set. ### Claim 8 (depends on 1) The method of claim 1, wherein reporting the CSI of the each subband in the first set and the relative value of the each subband in the second set to the base station comprises: a number of bits used for reporting the CSI of the each subband in the first set being greater than a number of bits used for reporting the relative value of the each subband in the second set. ### Claim 9 (depends on 8) The method of claim 8, wherein reporting the CSI of the each subband in the first set and the relative value of the each subband in the second set to the base station comprises: in a case where the number of bits used for reporting the relative value of the each subband in the second set is 1, a zero state of the bit indicates that the CSI of the each subband in the second set is unchanged with respect to the CSI of the reference subband of the each subband in the second set, and a non-zero state of the bit indicates that the CSI of the each subband in the second set changes in a preset direction and by a preset magnitude with respect to the CSI of the reference subband of the each subband in the second set. ### Claim 10 A method for processing channel state information (CSI), comprising: receiving CSI of each subband in a first set and a relative value of each subband in a second set which are sent by a terminal, wherein the relative value is a relative value between CSI of the each subband in the second set and CSI of a reference subband corresponding to the each subband in the second set, a sum of a number of subbands in the first set and a number of subbands in the second set is M, and M is an integer greater than 1; and determining CSI of the each subband in the second set according to the relative value of the each subband in the second set and the CSI of the reference subband corresponding to the each subband in the second set; wherein the reference subband corresponding to the each subband in the second set comprises at least one subband in the first set or a subband adjacent to the each subband in the second set, wherein a reference subband of at least one subband in the second set is at least one subband in the first set; and wherein determining the CSI of the each subband in the second set according to the relative value of the each subband in the second set and the CSI of the reference subband corresponding to the each subband in the second set comprises: determining the CSI of the each subband in the second set by substituting the relative value of the each subband in the second set and CSI of the subband adjacent to the each subband in the second set into a second preset function. ### Claim 11 (depends on 10) The method of claim 10, wherein the CSI comprises at least one of: a coefficient of a vector participating in forming precoding, a phase of the coefficient, or an amplitudes of the coefficient. ### Claim 12 (depends on 10) The method of claim 10, wherein the reference subband corresponding to the each subband in the second set comprises at least one subband in the first set. ### Claim 13 (depends on 1) A device for reporting channel state information, comprising: a processor, a memory and a communication bus; wherein the communication bus is configured to implement connection and communication between the processor and the memory; and the processor is configured to execute a program for reporting channel state information stored in the memory to implement the method of claim 1. ### Claim 14 (depends on 10) A device for processing channel state information, comprising: a processor, a memory and a communication bus; wherein the communication bus is configured to implement connection and communication between the processor and the memory; and the processor is configured to execute a program for processing channel state information stored in the memory to implement the method of claim 10. ### Claim 15 (depends on 1) A non-transitory storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the method of claim 1. ### Claim 16 (depends on 10) A non-transitory storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the method of claim 10.