# US 11,445,396 B2 · Channel measurement method and apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,445,396 B2 - Document ID: US11445396B2 - Status: Granted - Kind: B2 - Application number: 16/674,858 - Filed: 2019-11-05 - Published: 2020-02-27 - Granted: 2022-09-13 - Earliest claimed: 2017-10-10 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Wei Han; Huangping Jin; Ye Wu; Xiaoyan Bi - Web page: https://patentgrep.com/patent/US11445396B2 ## CPC - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports} - H04B 7/06: at the transmitting station - H04B 7/0626: {Channel coefficients, e.g. channel state information [CSI]} - H04L 1/06: using space diversity - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04L 5/0057: {Physical resource allocation for CQI} - H04L 25/02: Details {; arrangements for supplying electrical power along data transmission lines (systems for transmitting signals via power distribution lines H04B3/54)} - H04L 25/0202: {Channel estimation} - H04W 72/04: Wireless resource allocation - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION ## Abstract Embodiments of the present invention provide a channel measurement method and an apparatus. The method includes: for a to-be-measured frequency band that includes at least one reporting subband and 0 or more non-reporting subbands, obtaining channel state information of each reporting subband, where the channel state information of each reporting subband is obtained based on channel estimation, and the at least one reporting subband is included in reporting subbands that are contiguous in frequency domain, or the at least one reporting subband is included in reporting subbands that are not contiguous in frequency domain; and sending a measurement report of the to-be-measured frequency band to a transmit end device, where the measurement report includes the channel state information of one or more of the at least one reporting subband. ## Claims ### Claim 1 A channel measurement method, comprising: for a to-be-measured frequency band that comprises reporting subbands and at least one non-reporting subband, obtaining channel state information of each reporting subband, wherein the channel state information of each reporting subband is obtained based on channel estimation, and the reporting subbands are contiguous in frequency domain, or the reporting subbands are not contiguous in frequency domain; sending a measurement report of the to-be-measured frequency band to a transmit end device, wherein the measurement report comprises the channel state information of one or more of the reporting subbands; receiving dynamic signaling, wherein the dynamic signaling comprises a third information bitmap, and the third information bitmap is used to indicate an index of a first information bitmap or an index of a second information bitmap, wherein the information bit map is used to indicate the reporting subband and a non-reporting subband in the reporting band, wherein the second information bit map is used to a reporting subband group and non-reporting subband group; and selecting, based on an index indicator of the third information bitmap, the reporting subband and the non-reporting subband that are indicated by the first information bitmap or the reporting subband group and non-reporting subband group indicated by the second information bitmap; wherein the channel state information of the at least one non-reporting subband is based on the channel state information of the reporting subbands, and the channel state information of the at least one non-reporting subband is transmitted to the transmit end device. ### Claim 2 (depends on 1) The method according to claim 1, further comprising: receiving reporting subband configuration information from the transmit end device or searching for locally prestored reporting subband configuration information, wherein the reporting subband configuration information is used to indicate a reporting band and a subband that is a reporting subband in the reporting band; and determining at least one reporting subband in the reporting band based on the reporting subband configuration information. ### Claim 3 (depends on 2) The method according to claim 2, wherein the reporting subband configuration information further comprises reporting band indication information; and the reporting band indication information indicates a start position of the reporting subband and a quantity of the reporting subbands, or indicates a start position and an end position of the reporting subband. ### Claim 4 (depends on 2) The method according to claim 2, wherein a quantity of bits of the first information bitmap is the same as a quantity of actual reporting subbands, and all bits in the first information bitmap are used to indicate the reporting subband and the non-reporting subband; or a quantity of bits of the first information bitmap is the same as a maximum quantity of reporting subbands that is avowed by a system, and some or all bits in the first information bitmap are used to indicate the reporting subband and the non-reporting subband. ### Claim 5 (depends on 2) The method according to claim 2, wherein the reporting subband configuration information comprises reporting subband start position indication information and reporting subband decimation indication information; wherein the reporting subband start position indication information is used to indicate a start position of the reporting subband; and the reporting subband decimation indication information is used to instruct to decimate, from the start position of the reporting subband or from an offset of O subbands, first N subbands or last N subbands from every M contiguous subband as reporting subbands, wherein O, N and M are integers. ### Claim 6 (depends on 5) The method according to claim 5, wherein after the first N subbands or the last N subbands are decimated from every M contiguous subbands as the reporting subbands, reporting is performed after priority sorting is performed on the decimated reporting subbands. ### Claim 7 (depends on 1) The method according to claim 1, wherein the channel state information is one of the following information: a channel quality indicator, a preceding matrix indicator, a rank indication, and a channel state information reference signal resource indicator. ### Claim 8 (depends on 1) The method according to claim 1, wherein the channel state information of the at least one non-reporting subband and the channel state information of the reporting subbands are of different types. ### Claim 9 (depends on 1) The method according to claim 1, wherein the measurement report of the to-be-measured frequency band to the transmit end device includes some but less than all of the channel state information of the at least one non-reporting subband. ### Claim 10 A receive end device, comprising: a processor, configured to: for a to-be-measured frequency band that comprises reporting subbands and at least one non-reporting subband, obtain channel state information of each reporting subband, wherein the channel state information of each reporting subband is obtained based on channel estimation, and the reporting subbands are contiguous in frequency domain, or the reporting subbands are not contiguous in frequency domain; and a transceiver, configured to: send a measurement report of the to-be-measured frequency band to a transmit end device, wherein the measurement report comprises the channel state information of one or more of the reporting subbands, wherein the channel state information of the at least one non-reporting subband is transmitted to the transmit end device; receive dynamic signaling, wherein the dynamic signaling comprises a third information bitmap, and the third information bitmap is used to indicate an index of a first information bitmap or an index of a second information bitmap, wherein the information bit map is used to indicate the reporting subband and a non-reporting subband in the reporting band, wherein the second information bit map is used to a reporting subband group and non-reporting subband group; and select, based on an index indicator of the third information bitmap, the reporting subband and the non-reporting subband that are indicated by the first information bitmap or the reporting subband group and non-reporting subband group indicated by the second information bitmap. ### Claim 11 (depends on 10) The receive end device according to claim 10, wherein the transceiver is further configured to: receive reporting subband configuration information from the transmit end device or search for locally prestored reporting subband configuration information, wherein the reporting subband configuration information is used to indicate a reporting band and a subband that is a reporting subband in the reporting band; and the processor is further configured to determine at least one reporting subband in the reporting band based on the reporting subband configuration information. ### Claim 12 (depends on 11) The receive end device according to claim 11, wherein the reporting subband configuration information comprises reporting subband indication information; and the reporting subband indication information comprises a first information bitmap, and the first information bitmap is used to indicate the reporting subband and a non-reporting subband in the reporting band. ### Claim 13 (depends on 12) The receive end device according to claim 12, wherein the reporting subband configuration information further comprises reporting band indication information; and the reporting band indication information indicates a start position of the reporting subband and a quantity of the reporting subbands, or indicates a start position and an end position of the reporting subband. ### Claim 14 (depends on 12) The receive end device according to claim 12, wherein a quantity of the first information bits is the same as a quantity of actual reporting subbands, and all bits in the first information bitmap are used to indicate the reporting subband and the non-reporting subband; or a quantity of the first information bits is the same as a maximum quantity of reporting subbands that is allowed by a system, and some or all bits in the first information bitmap are used to indicate the reporting subband and the non-reporting subband. ### Claim 15 (depends on 11) The receive end device according to claim 11, wherein the reporting subband configuration information comprises reporting subband start position indication information and reporting subband decimation indication information; wherein the reporting subband start position indication information is used to indicate a start position of the reporting subband; and the reporting subband decimation indication information is used to instruct to decimate, from the start position of the reporting subband or from an offset of O subbands, first N subbands or last N subbands from every M contiguous subband as reporting subbands, wherein O, N and M are integers. ### Claim 16 (depends on 15) The receive end device according to claim 15, wherein the processor is further configured to: after the first N subbands or the last N subbands are decimated from every M contiguous subbands as the reporting subbands, perform reporting after performing priority sorting on the decimated reporting subbands. ### Claim 17 (depends on 11) The receive end device according to claim 11, wherein the channel state information is one of the following information: a channel quality indicator, a precoding matrix indicator, a rank indication, and a channel state information reference signal resource indicator. ### Claim 18 (depends on 1) A chip, comprising: a processor, configured to invoke an instruction from a memory and execute the instruction stored in the memory, so that a communications device on which the chip is installed performs the method according to claim 1.