# US 12,003,970 B2 · Spatial reuse indication method and wireless communications apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,003,970 B2 - Document ID: US12003970B2 - Status: Granted - Kind: B2 - Application number: 17/388,467 - Filed: 2021-07-29 - Published: 2021-11-18 - Granted: 2024-06-04 - Earliest claimed: 2019-01-30 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Zhongjiang Yan; Mao Yang; Yunbo Li - Web page: https://patentgrep.com/patent/US12003970B2 ## CPC - H04W 16/02: Resource partitioning among network components, e.g. reuse partitioning - H04W 74/002: {Transmission of channel access control information} - H04L 5/00: Arrangements affording multiple use of the transmission path - H04W 24/02: Arrangements for optimising operational condition - H04W 72/046: {the resource being in the space domain, e.g. beams} - H04W 74/0816: with collision avoidance - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract Embodiments of this application disclose a spatial reuse indication method and a wireless communications apparatus, thereby reducing a quantity of nodes that can participate in spatial reuse, reducing mutual interference between nodes in spatial reuse, and improving spatial reuse system performance. The method in some implementations includes a first access point generates a spatial reuse limitation indication and a spatial reuse group indication. The spatial reuse limitation indication can be used to indicate whether only a node in a spatial reuse group is allowed for spatial reuse and to indicate the spatial reuse group. The spatial reuse group includes one or more basic service sets. The first access point sends the spatial reuse limitation indication and the spatial reuse group indication. ## Claims ### Claim 1 A wireless communications apparatus, comprising: a memory and at least one processor, wherein the memory is coupled to the at least one processor, and the memory is configured to store one or more computer executable instructions, the at least one processor is configured to invoke the one or more computer executable instructions to perform operations comprising: generating a spatial reuse limitation indication and a spatial reuse group indication, wherein the spatial reuse limitation indication is used to indicate whether only a node in a spatial reuse group is allowed for spatial reuse, the spatial reuse group indication is used to indicate the spatial reuse group, and the spatial reuse group comprises one or more basic service sets; and sending the spatial reuse limitation indication and the spatial reuse group indication. ### Claim 2 (depends on 1) The wireless communications apparatus according to claim 1, wherein a first value of the spatial reuse limitation being set indicates that only the node in the spatial reuse group is allowed for spatial reuse; and a second value of the spatial reuse limitation being set indicates a node allowed for spatial reuse is not limited by the spatial reuse group. ### Claim 3 (depends on 1) The wireless communications apparatus according to claim 1, wherein the spatial reuse group indication comprises at least one of the following: an identifier of the one or more basic service sets, a color of the one or more basic service sets, or a bitmap corresponding to the one or more basic service sets. ### Claim 4 (depends on 1) The wireless communications apparatus according to claim 1, wherein the one or more basic service sets are comprised in one or more basic service set groups, and the spatial reuse group indication comprises at least one of the following: a group identifier of the one or more basic service set groups, or a bitmap corresponding to the one or more basic service set groups. ### Claim 5 (depends on 1) The wireless communications apparatus according to claim 1, wherein the spatial reuse limitation indication and the spatial reuse group indication are carried in a trigger frame, the spatial reuse group indication is carried in a padding part of the trigger frame, the padding part further comprises a special association identifier, and the special association identifier comprises an association identifier that is not allocated by a first access point to a station associated with the first access point. ### Claim 6 A wireless communications apparatus, comprising: a memory and at least one processor, wherein the memory is coupled to the at least one processor, and the memory is configured to store one or more computer executable instructions, the at least one processor is configured to invoke the one or more computer executable instructions to perform operations comprising: receiving a spatial reuse limitation indication and a spatial reuse group indication, wherein the spatial reuse limitation indication is used to indicate whether only a node in a spatial reuse group is allowed for spatial reuse, the spatial reuse group indication is used to indicate the spatial reuse group, and the spatial reuse group comprises one or more basic service sets; and determining, based on the spatial reuse limitation indication and the spatial reuse group indication, whether to perform spatial reuse based on a spatial reuse parameter. ### Claim 7 (depends on 6) The wireless communications apparatus according to claim 6, wherein, a first value of the spatial reuse limitation indication indicates that only the node in the spatial reuse group is allowed for spatial reuse; and, or if the spatial reuse limitation indication a second value of the spatial reuse limitation indication indicates that a node allowed for spatial reuse is not limited by the spatial reuse group. ### Claim 8 (depends on 6) The wireless communications apparatus according to claim 6, wherein the spatial reuse group indication comprises at least one of the following: an identifier of the one or more basic service sets, a color of the one or more basic service sets, or a bitmap corresponding to the one or more basic service sets. ### Claim 9 (depends on 6) The wireless communications apparatus according to claim 6, wherein the one or more basic service sets are comprised in one or more basic service set groups, and the spatial reuse group indication comprises at least one of the following: a group identifier of the one or more basic service set groups, or a bitmap corresponding to the one or more basic service set groups. ### Claim 10 (depends on 6) The wireless communications apparatus according to claim 6, wherein the spatial reuse limitation indication and the spatial reuse group indication come from a first access point in a basic service set different from a basic service set in which the apparatus is located, and wherein, determining, based on the spatial reuse limitation indication and the spatial reuse group indication, whether to perform spatial reuse based on the spatial reuse parameter comprises: determining that the spatial reuse limitation indication is a first value and that the basic service set to which the apparatus belongs is comprised in the one or more basic service sets; and determining that the spatial reuse limitation indication is a second value and performing spatial reuse based on the spatial reuse parameter. ### Claim 11 (depends on 10) The wireless communications apparatus according to claim 10, further comprising: determining that the basic service set to which the apparatus belongs is comprised in the one or more basic service sets and performing spatial reuse based on the spatial reuse parameter. ### Claim 12 (depends on 10) The wireless communications apparatus according to claim 10, wherein the spatial reuse limitation indication and the spatial reuse group indication are carried in a trigger frame, the spatial reuse group indication is carried in a padding part of the trigger frame, the padding part comprises a special association identifier, and the special association identifier comprises an association identifier that is not allocated by the first access point to an apparatus associated with the first access point. ### Claim 13 (depends on 6) The wireless communications apparatus according to claim 6, wherein the spatial reuse limitation indication comes from a first access point in a basic service set different from a basic service set to which the apparatus belongs, and the spatial reuse group indication comes from a second access point in a basic service set the same as the basic service set to which the apparatus belongs, wherein determining, based on the spatial reuse limitation indication and the spatial reuse group indication, whether to perform spatial reuse based on the spatial reuse parameter comprises: determining that the basic service set to which the first access point belongs is comprised in the one or more basic service sets where the spatial reuse limitation indication is a first value; and, performing spatial reuse based on the spatial reuse parameter if the spatial reuse limitation is a second value. ### Claim 14 (depends on 13) The wireless communications apparatus according to claim 13, further comprising: performing spatial reuse based on the spatial reuse parameter wherein the basic service set to which the first access point belongs is comprised in the one or more basic service sets. ### Claim 15 A spatial reuse indication method, comprising: generating, by a first access point, a spatial reuse limitation indication and a spatial reuse group indication, wherein the spatial reuse limitation indication is used to indicate whether only a node in a spatial reuse group is allowed for spatial reuse, the spatial reuse group indication is used to indicate the spatial reuse group, and the spatial reuse group comprises one or more basic service sets; and sending, by the first access point, the spatial reuse limitation indication and the spatial reuse group indication. ### Claim 16 (depends on 15) The method according to claim 15, wherein, a first value of the spatial reuse limitation indication indicates that only the node in the spatial reuse group is allowed for spatial reuse; and wherein, a second value of the spatial reuse limitation indication indicates that a node allowed for spatial reuse is not limited by the spatial reuse group. ### Claim 17 (depends on 15) The method according to claim 15, wherein the spatial reuse group indication comprises at least one of the following: an identifier of the one or more basic service sets, a color of the one or more basic service sets, or a bitmap corresponding to the one or more basic service sets. ### Claim 18 (depends on 15) The method according to claim 15, wherein the spatial reuse limitation indication and the spatial reuse group indication are carried in a trigger frame, the spatial reuse group indication is carried in a padding part of the trigger frame, the padding part further comprises a special association identifier, and the special association identifier comprises an association identifier that is not allocated by the first access point to a station associated with the first access point. ### Claim 19 A spatial reuse indication method, comprising: receiving, by a station, a spatial reuse limitation indication and a spatial reuse group indication, wherein the spatial reuse limitation indication is used to indicate whether only a node in a spatial reuse group is allowed for spatial reuse, the spatial reuse group indication is used to indicate the spatial reuse group, and the spatial reuse group comprises one or more basic service sets; and determining, by the station based on the spatial reuse limitation indication and the spatial reuse group indication, whether to perform spatial reuse based on a spatial reuse parameter. ### Claim 20 (depends on 19) The method according to claim 19, wherein, a first value of the spatial reuse limitation indication indicates that only the node in the spatial reuse group is allowed for spatial reuse; and wherein, a second value of the spatial reuse limitation indication indicates that a node allowed for spatial reuse is not limited by the spatial reuse group.