# US 12,191,976 B2 · Beam information indication 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 12,191,976 B2 - Document ID: US12191976B2 - Status: Granted - Kind: B2 - Application number: 18/158,298 - Filed: 2023-01-23 - Published: 2023-05-25 - Granted: 2025-01-07 - Earliest claimed: 2020-07-24 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Yu Wang; Yunfei Qiao; Xueliang Shi; Hejia Luo; Rong Li; Jun Wang - Web page: https://patentgrep.com/patent/US12191976B2 ## CPC - H04B 7/18513: {Transmission in a satellite or space-based system} - H04B 7/2041: {Spot beam multiple access} - H04B 7/0695: {using beam selection} - H04B 7/0857: {using maximum ratio combining techniques, e.g. signal-to- interference ratio [SIR], received signal strenght indication [RSS]} - H04B 7/088: {using beam selection} - H04B 7/10: Polarisation diversity; Directional diversity - H04W 72/046: {the resource being in the space domain, e.g. beams} - 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 This disclosure provides a beam information indication method and an apparatus. The terminal device obtains reference domain information of a plurality of beams and a first offset corresponding to each moment, to update beam domain information, where the first offset indicates an offset of domain information of the plurality of beams relative to the reference domain information of the plurality of beams. In technical solutions provided in this disclosure, domain information of the plurality of beams can be updated with low signaling overheads. The technical solutions may be applied to a satellite communication system, to implement interference management of satellite beams. ## Claims ### Claim 1 A beam information indication method, the method comprising: obtaining, by a first communication apparatus, a first offset, wherein the first offset indicates an offset of domain information of a plurality of beams relative to reference domain information of the plurality of beams, wherein the domain information comprises frequency domain information and polarization domain information, wherein each beam of the plurality of beams corresponds to a different color in color multiplexing information, and wherein each color corresponds to a different combination of a frequency mode and a polarization mode; and updating, by the first communication apparatus, the domain information of the plurality of beams based on the reference domain information of the plurality of beams and the first offset. ### Claim 2 (depends on 1) The method according to claim 1, wherein the first offset is an offset relative to a reference domain information identifier or the reference domain information. ### Claim 3 (depends on 1) The method according to claim 1, wherein the reference domain information is domain information obtained at a reference moment or domain information determined before a current moment. ### Claim 4 (depends on 1) The method according to claim 1, wherein the domain information is carried in a bandwidth part (BWP) information element. ### Claim 5 (depends on 1) The method according to claim 1, wherein the time domain information comprises a frame, a subframe, a slot, a mini-slot, or a symbol; wherein the frequency domain information comprises a frequency or a frequency channel number; and wherein the polarization domain information comprises at least one of left hand circular polarization (LHCP) or right hand circular polarization (RHCP). ### Claim 6 (depends on 1) The method according to claim 1, wherein the domain information of the plurality of beams is updated periodically, and the domain information comprises at least one of the reference domain information, the first offset, or a quantity of beams. ### Claim 7 (depends on 6) The method according to claim 6, wherein: reference domain information of the plurality of beams in a current period is different from reference domain information of the plurality of beams in a period before the current period; a value range of the first offset of the plurality of beams in a current period is different from that in a period before the current period; or a quantity of beams in a current period is different from a quantity of beams in a period before the current period. ### Claim 8 (depends on 1) The method according to claim 1, wherein the first communication apparatus does not obtain the reference domain information within a preset duration, the method further comprising: requesting, by the first communication apparatus, the reference domain information from a second communication apparatus. ### Claim 9 (depends on 1) The method according to claim 1, wherein the first offset is carried in a system information block (SIB). ### Claim 10 A beam information indication method, the method comprising: determining, by a second communication apparatus, a first offset, wherein the first offset indicates an offset of domain information of a plurality of beams relative to reference domain information of the plurality of beams, and the domain information comprises frequency domain information and polarization domain information, wherein each beam of the plurality of beams corresponds to a different color in color multiplexing information, and wherein each color corresponds to a different combination of a frequency mode and a polarization mode; and sending, by the second communication apparatus, the first offset. ### Claim 11 (depends on 10) The method according to claim 10, wherein the first offset is an offset relative to a reference domain information identifier or the reference domain information. ### Claim 12 (depends on 10) The method according to claim 10, wherein the reference domain information is domain information sent at a reference moment. ### Claim 13 (depends on 10) The method according to claim 10, wherein the domain information is carried in a bandwidth part (BWP) information element. ### Claim 14 (depends on 10) The method according to claim 10, wherein the time domain information comprises a frame, a subframe, a slot, a mini-slot, or a symbol; wherein the frequency domain information comprises a frequency or a frequency channel number; and wherein the polarization domain information comprises at least one of left hand circular polarization (LHCP) or right hand circular polarization (RHCP). ### Claim 15 (depends on 10) The method according to claim 10, wherein the domain information of the plurality of beams is updated periodically, and the domain information comprises at least one of the reference domain information, the first offset, or a quantity of beams. ### Claim 16 (depends on 15) The method according to claim 15, wherein: reference domain information of the plurality of beams in a current period is different from reference domain information of the plurality of beams in a period before the current period; a value range of the first offset of the plurality of beams in a current period is different from that in a period before the current period; or a quantity of beams in a current period is different from a quantity of beams in a period before the current period. ### Claim 17 (depends on 16) The method according to claim 16, further comprising: receiving, by the second communication apparatus, a request of a first communication apparatus; and sending, by the second communication apparatus, the reference domain information to the first communication apparatus. ### Claim 18 (depends on 10) The method according to claim 10, wherein the first offset is carried in a system information block (SIB) and is sent by the second communication apparatus via broadcasting. ### Claim 19 (depends on 1) A communication apparatus, comprising a logic circuit and an input/output interface, wherein the input/output interface is configured to input the first offset, and the logic circuit is configured to perform the method according to claim 1. ### Claim 20 (depends on 10) A communication apparatus, comprising a logic circuit and an input/output interface, wherein the input/output interface is configured to output the first offset, and the logic circuit is configured to perform the method according to claim 10.