# US 12,764,815 B2 · Data transmission 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 12,764,815 B2 - Document ID: US12764815B2 - Status: Granted - Kind: B2 - Application number: 18/153,616 - Filed: 2023-01-12 - Published: 2023-06-15 - Granted: 2026-10-13 - Earliest claimed: 2020-07-13 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Ming Gan; Dandan Liang; Yuchen Guo; Yunbo Li; Jian Yu - Web page: https://patentgrep.com/patent/US12764815B2 ## CPC - H04W 76/15: Setup of multiple wireless link connections - H04W 74/0816: with collision avoidance - H04W 74/0866: {using a dedicated channel for access} - H04W 76/11: Allocation or use of connection identifiers - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A data transmission method includes sending, by a first station in a first multi-link device, a third frame. The third frame indicates the first station enables a mode of sharing a quantity of spatial streams. The mode of sharing the quantity of spatial streams is used for enabling the first station to use the shared spatial streams. A quantity of shared spatial streams is a maximum quantity of shared spatial streams supported by the first multi-link device. The data transmission method also includes receiving, by the first station, a fourth frame. The fourth frame is used for responding to the third frame. ## Claims ### Claim 1 A data transmission method, comprising: sending, by a first station in a first multi-link device, a third frame, wherein the third frame indicates the first station enabled a sharing mode in which the first station is a shared station, the shared station shares spatial streams with another station in the first multi-link device, the sharing mode is used for enabling the first station to use the shared spatial streams for receiving or transmitting a physical layer protocol data unit (PPDU), and a quantity of the plurality of the shared spatial streams used by the first station is less than or equal to a maximum quantity of shared spatial streams supported by the first multi-link device, the third frame comprises a shared station field, and the shared station field indicates a plurality of stations in the sharing mode; and receiving, by the first station, a fourth frame, wherein the fourth frame is used for responding to the third frame. ### Claim 2 (depends on 1) The data transmission method according to claim 1, further comprising: receiving, by the first station, a fifth frame, wherein the fifth frame indicates the first station to disable the sharing mode; and sending, by the first station, a sixth frame, wherein the sixth frame is used for responding to the fifth frame. ### Claim 3 (depends on 1) The data transmission method according to claim 1, wherein the third frame further comprises at least one of a first field or a second field, the first field indicates, for each modulation and coding scheme (MCS) among a plurality of MCSs, a maximum quantity of spatial streams for reception supported by the first multi-link device, and the second field indicates, for each MCS among the plurality of MCSs, a maximum quantity of spatial streams for transmitting supported by the first multi-link device. ### Claim 4 (depends on 3) The data transmission method according to claim 3, wherein the first field is carried in a Supported EHT MCS and NSS Set field of the third frame. ### Claim 5 (depends on 3) The data transmission method according to claim 3, wherein the second field is carried in a Supported EHT MCS and NSS Set field of the frame. ### Claim 6 (depends on 1) The data transmission method according to claim 1, wherein the shared station field comprises a plurality of link identifier fields indicating the plurality of stations in the sharing mode. ### Claim 7 An apparatus, comprising: at least one processor; and a memory having instructions stored thereon that, when executed by the at least one processor, cause the apparatus to: cause a first station in a first multi-link device to send a third frame, wherein the third frame indicates the first station enabled a sharing mode in which the first station is a shared station, the shared station shares spatial streams with another station in the first multi-link device, the sharing mode is used for enabling the first station to use the shared spatial streams for receiving or transmitting a physical layer protocol data unit (PPDU), and a quantity of the plurality of the shared spatial streams used by the first station is less than or equal to a maximum quantity of shared spatial streams supported by the first multi-link device, the third frame comprises a shared station field, and the shared station field indicates a plurality of stations in the sharing mode; and receive a fourth frame, wherein the fourth frame is used for responding to the third frame. ### Claim 8 (depends on 7) The apparatus according to claim 7, wherein the apparatus is further caused to: cause the first station to process a fifth frame, wherein the fifth frame indicates the first station to disable the sharing mode; and cause the first station to send a sixth frame, wherein the sixth frame is used for responding to the fifth frame. ### Claim 9 (depends on 7) The apparatus according to claim 7, wherein the third frame further comprises at least one of a first field or a second field, the first field indicates, for each modulation and coding scheme (MCS) among a plurality of MCSs, a maximum quantity of spatial streams for reception supported by the first multi-link device, and the second field indicates, for each MCS among the plurality of MCSs, a maximum quantity of spatial streams for transmitting supported by the first multi-link device. ### Claim 10 (depends on 9) The apparatus according to claim 9, wherein the first field is carried in a Supported EHT MCS and NSS Set field of the third frame. ### Claim 11 (depends on 9) The apparatus according to claim 9, wherein the second field is carried in a Supported EHT MCS and NSS Set field of the frame. ### Claim 12 (depends on 7) The apparatus according to claim 7, wherein the shared station field comprises a plurality of link identifier fields indicating the plurality of stations in the sharing mode. ### Claim 13 A non-transitory computer-readable storage medium having instructions stored thereon that, when executed by a processor, cause an apparatus to: cause a first station in a first multi-link device to send a third frame, wherein the third frame indicates the first station enabled a sharing mode in which the first station is a shared station, the shared station shares spatial streams with another station in the first multi-link device, the sharing mode is used for enabling the first station to use the shared spatial streams for receiving or transmitting a physical layer protocol data unit (PPDU), and a quantity of the plurality of the shared spatial streams used by the first station is less than or equal to a maximum quantity of shared spatial streams supported by the first multi-link device, the third frame comprises a shared station field, and the shared station field indicates a plurality of stations in the sharing mode; and receive a fourth frame, wherein the fourth frame is used for responding to the third frame. ### Claim 14 (depends on 13) The non-transitory computer-readable storage medium according to claim 13, wherein the third frame further comprises at least one of a first field or a second field, the first field indicates, for each modulation and coding scheme (MCS) among a plurality of MCSs, a maximum quantity of spatial streams for reception supported by the first multi-link device, and the second field indicates, for each MCS among the plurality of MCSs, a maximum quantity of spatial streams for transmitting supported by the first multi-link device. ### Claim 15 (depends on 14) The non-transitory computer-readable storage medium according to claim 14, wherein the first field is carried in a Supported EHT MCS and NSS Set field of the third frame. ### Claim 16 (depends on 14) The non-transitory computer-readable storage medium according to claim 14, wherein the second field is carried in a Supported EHT MCS and NSS Set field of the frame. ### Claim 17 (depends on 13) The non-transitory computer-readable storage medium according to claim 13, wherein the shared station field comprises a plurality of link identifier fields indicating the plurality of stations in the sharing mode.