# US 11,122,578 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 11,122,578 B2 - Document ID: US11122578B2 - Status: Granted - Kind: B2 - Application number: 15/956,952 - Filed: 2018-04-19 - Published: 2018-08-23 - Granted: 2021-09-14 - Earliest claimed: 2015-10-20 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Jun Zhu; Yingpei Lin; Jun Luo; Jiyong Pang - Web page: https://patentgrep.com/patent/US11122578B2 ## CPC - H04W 72/541: using the level of interference - H04B 7/02: Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas (RAKE receivers H04B1/7115) - H04B 7/0697: {using spatial multiplexing} - H04J 11/005: {of intercell interference} - H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 5/0073: {Allocation arrangements that take into account other cell interferences} - H04L 5/0092: {Indication of how the channel is divided} - H04W 52/00: Power management {, e.g. Transmission Power Control [TPC] or power classes} - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W 74/0816: with collision avoidance - H04L 5/0037: {Inter-user or inter-terminal allocation} - H04W 84/12: WLAN [Wireless Local Area Networks] - H04W 92/10: between terminal device and access point, i.e. wireless air interface - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION - H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract The present invention discloses a data transmission method and apparatus. The method includes: generating, by the primary access point, spatial reuse transmission signaling, the spatial reuse transmission signaling is used to indicate a reuse transmission device of the spatial reuse link to perform data transmission based on the spatial reuse link according to the spatial reuse transmission signaling; sending, by the primary access point, the spatial reuse transmission signaling. According to the data transmission method and apparatus in embodiments of the present invention, mutual interference between the primary link and the spatial reuse link during data transmission can be reduced, and transmission quality can be improved. ## Claims ### Claim 1 A primary apparatus, comprising: at least one processor; one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to obtain information indicating spatial reuse transmission, wherein the information indicating spatial reuse transmission indicates whether or not a spatial reuse transmission apparatus of a spatial reuse link is allowed to perform spatial reuse transmission by using all or some of time-frequency resources of a primary link; wherein the information indicating spatial reuse transmission occupies 4 bits, wherein, when value of the 4 bits is 0, the information indicating spatial reuse transmission indicates that spatial reuse transmission is prohibited, and wherein one value of the 4 bits, which is different from 0, indicates an allowed maximum interference power; and a transceiver coupled to the at least one processor, the transceiver configured to send the information indicating spatial reuse transmission. ### Claim 2 (depends on 1) The primary apparatus according to claim 1, wherein the primary apparatus is a primary access point, and wherein the programming instructions are for execution by the at least one processor to generate the information indicating spatial reuse transmission. ### Claim 3 (depends on 1) The primary apparatus according to claim 1, wherein the primary apparatus is a primary station, and wherein the programming instructions are for execution by the at least one processor to generate the information indicating spatial reuse transmission. ### Claim 4 (depends on 1) The primary apparatus according to claim 1, wherein the primary apparatus is a primary station, wherein the programming instructions are for execution by the at least one processor to make the transceiver to receive a trigger frame, and wherein the trigger frame carries the information indicating spatial reuse transmission. ### Claim 5 A primary access point, comprising: at least one processor; one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to generate a trigger frame, wherein the trigger frame carries information indicating spatial reuse transmission which indicates whether or not a spatial reuse transmission apparatus of a spatial reuse link is allowed to perform spatial reuse transmission by using all or some of time-frequency resources of a primary link; wherein the information indicating spatial reuse transmission occupies 4 bits, wherein, when value of the 4 bits is 0, the information indicating spatial reuse transmission indicates that spatial reuse transmission is prohibited, and wherein one value of the 4 bits, which is different from 0, indicates an allowed maximum interference power; and a transceiver coupled to the at least one processor, the transceiver configured to send the trigger frame. ### Claim 6 A spatial reuse transmission apparatus, comprising: at least one processor; a transceiver coupled to the at least one processor, the transceiver configured to receive information indicating spatial reuse transmission, wherein the information indicating spatial reuse transmission indicates whether or not a spatial reuse transmission apparatus of a spatial reuse link is allowed to perform spatial reuse transmission by using all or some of time-frequency resources of a primary link; wherein the information indicating spatial reuse transmission occupies 4 bits, wherein, when value of the 4 bits is 0, the information indicating spatial reuse transmission indicates that spatial reuse transmission is prohibited, and wherein one value of the 4 bits, which is different from 0, indicates an allowed maximum interference power; and one or more memories coupled to the at least one processor and storing programming instructions for execution by the at least one processor to perform spatial reuse transmission according to the information indicating spatial reuse transmission.