# US 12,015,455 B2 · Capability information reporting method, precoding matrix indicator feedback method and communication device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,015,455 B2 - Document ID: US12015455B2 - Status: Granted - Kind: B2 - Application number: 17/382,400 - Filed: 2021-07-22 - Published: 2021-11-11 - Granted: 2024-06-18 - Earliest claimed: 2019-01-22 - Assignees: Vivo Mobile Communication Co., Ltd. - Applicants: Vivo Mobile Communication Co., Ltd. - Inventors: Yuan Shi - Web page: https://patentgrep.com/patent/US12015455B2 ## CPC - H04B 7/0417: Feedback systems - H04B 7/063: {Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection} - H04B 7/0626: {Channel coefficients, e.g. channel state information [CSI]} - H04B 7/0628: {Diversity capabilities} - H04B 7/0632: {Channel quality parameters, e.g. channel quality indicator [CQI]} - H04B 7/0639: {Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection} - H04W 8/24: Transfer of terminal data - H04B: TRANSMISSION - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A capability information reporting method includes: reporting capability information, the capability information being used to indicate whether a terminal supports a first capability, and the first capability being a capability of supporting that a PMI subband size is less than a CQI subband size. ## Claims ### Claim 1 A capability information reporting method, applied to a terminal, comprising: reporting capability information, wherein the capability information is used to indicate whether the terminal supports a first capability, and the first capability is a capability of supporting that a precoding matrix indicator (PMI) subband size is less than a channel quality indicator (CQI) subband size; and if the capability information does not comprise indication information of the first capability, the capability information indicates that the terminal does not support the first capability. ### Claim 2 (depends on 1) The method according to claim 1, wherein in a case where the capability information indicates that the terminal supports the first capability, the capability information comprises second indication information used to indicate a minimum PMI subband size supported by the terminal. ### Claim 3 (depends on 2) The method according to claim 2, wherein the second indication information is used to indicate a maximum R value supported by the terminal, and the maximum R value is a value obtained by dividing the CQI subband size by the minimum PMI subband size. ### Claim 4 (depends on 3) The method according to claim 3, wherein the second indication information occupies 1 bit. ### Claim 5 (depends on 1) The method according to claim 1, wherein the terminal proactively reports the capability information, or the terminal reports the capability information after receiving capability request information sent by a network device. ### Claim 6 A terminal, comprising: a memory, a processor, and a program stored in the memory and executable on the processor, wherein the program, when executed by the processor, causes the terminal to perform: reporting capability information, wherein the capability information is used to indicate whether the terminal supports a first capability, and the first capability is a capability of supporting that a precoding matrix indicator (PMI) subband size is less than a channel quality indicator (CQI) subband size; and if the capability information does not comprise indication information of the first capability, the capability information indicates that the terminal does not support the first capability. ### Claim 7 (depends on 6) The terminal according to claim 6, wherein in a case where the capability information indicates that the terminal supports the first capability, the capability information comprises second indication information used to indicate a minimum PMI subband size supported by the terminal. ### Claim 8 (depends on 7) The terminal according to claim 7, wherein the second indication information is used to indicate a maximum R value supported by the terminal, and the maximum R value is a value obtained by dividing the CQI subband size by the minimum PMI subband size. ### Claim 9 (depends on 8) The method according to claim 8, wherein the second indication information occupies 1 bit. ### Claim 10 (depends on 6) The terminal according to claim 6, wherein the terminal reports the capability information, or the terminal reports the capability information after receiving capability request information sent by a network device. ### Claim 11 A non-transitory computer-readable storage medium, wherein the non-transitory computer-readable storage medium stores a computer program, and the computer program, when executed by a processor of a terminal, causes the terminal to perform: reporting capability information, wherein the capability information is used to indicate whether the terminal supports a first capability, and the first capability is a capability of supporting that a precoding matrix indicator (PMI) subband size is less than a channel quality indicator (CQI) subband size; and if the capability information does not comprise indication information of the first capability, the capability information indicates that the terminal does not support the first capability. ### Claim 12 (depends on 11) The non-transitory computer-readable storage medium according to claim 11, wherein in a case where the capability information indicates that the terminal supports the first capability, the capability information comprises second indication information used to indicate a minimum PMI subband size supported by the terminal. ### Claim 13 (depends on 12) The non-transitory computer-readable storage medium according to claim 12, wherein the second indication information is used to indicate a maximum R value supported by the terminal, and the maximum R value is a value obtained by dividing the CQI subband size by the minimum PMI subband size. ### Claim 14 (depends on 13) The non-transitory computer-readable storage medium according to claim 13, wherein the second indication information occupies 1 bit. ### Claim 15 (depends on 11) The non-transitory computer-readable storage medium according to claim 11, wherein the terminal reports the capability information, or the terminal reports the capability information after receiving capability request information sent by a network device.