# US 12,604,352 B2 · Link availability and status indication for multi-link operation in WLAN > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,604,352 B2 - Document ID: US12604352B2 - Status: Granted - Kind: B2 - Application number: 17/147,322 - Filed: 2021-01-12 - Published: 2021-07-15 - Granted: 2026-04-14 - Earliest claimed: 2020-01-13 - Assignees: Apple Inc. - Applicants: Apple Inc. - Inventors: Jinjing Jiang; Yong Liu; Tianyu Wu; Su Khiong Yong; Jarkko L. Kneckt - Web page: https://patentgrep.com/patent/US12604352B2 ## CPC - H04W 72/541: using the level of interference - H04W 76/15: Setup of multiple wireless link connections - H04W 24/08: Testing, {supervising or monitoring} using real traffic - H04W 76/11: Allocation or use of connection identifiers - H04W 76/30: Connection release - H04W 84/12: WLAN [Wireless Local Area Networks] - 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 relates to methods for conducting multilink communications between wireless devices over a wireless local area network (WLAN). A wireless device determines link availability for multiple wireless links of the wireless device. The wireless device transmits link availability information for the multiple wireless links of the wireless device using a first wireless link of the wireless device. ## Claims ### Claim 1 An apparatus, comprising: a processor configured to, when executing instructions stored in a memory, perform operations comprising: determining, based at least in part on link availability of a plurality of wireless links of a wireless device being unknown and one of a power consumption preference configuration of the wireless device or one or more in-device co-existence conditions of the wireless device, the link availability for the plurality of wireless links of the wireless device; generating, based at least in part on the determined link availability for the plurality of wireless links of the wireless device, link availability information, wherein the link availability information includes operating mode indication information for one or more wireless links of the plurality of wireless links of the wireless device; and transmitting the link availability information for the plurality of wireless links of the wireless device using a first wireless link of the wireless device. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the link availability information is provided using one or more of: a management frame generated by a media access control (MAC) layer of the wireless device; or one or more A-Control subfields. ### Claim 3 (depends on 1) The apparatus of claim 1, wherein the link availability information is provided using a bitmap included in one or more A-Control subfields, wherein the bitmap includes, for a respective wireless link of the plurality of wireless links, a binary indication of whether the respective wireless link is available. ### Claim 4 (depends on 3) The apparatus of claim 3, wherein a position in the bitmap is mapped to a Link ID for a respective wireless link of the plurality of wireless links. ### Claim 5 (depends on 1) The apparatus of claim 1, wherein the link availability information includes, for each respective wireless link of the plurality of wireless links represented by a Link ID, an indication of an operating mode for the respective wireless link. ### Claim 6 A method, comprising: determining, based at least in part on link availability of a plurality of wireless links of a wireless device being unknown and one of a power consumption preference configuration of the wireless device or one or more in-device co-existence conditions of the wireless device, the link availability for the plurality of wireless links of the wireless device; generating, based at least in part on the determined link availability for the plurality of wireless links of the wireless device, link availability information, wherein the link availability information includes operating mode indication information for one or more wireless links of the plurality of wireless links of the wireless device; and transmitting the link availability information for the plurality of wireless links of the wireless device using a first wireless link of the wireless device. ### Claim 7 (depends on 6) The method of claim 6, further comprising: selecting a first one or more wireless links to communicate with a second wireless device by selecting one or more wireless links of the plurality of wireless links of the wireless device indicated to be available by the link availability information; and communicating with the second wireless device using the first one or more wireless links. ### Claim 8 (depends on 7) The method of claim 7, wherein the method further comprises: stopping communicating with the second wireless device using a wireless link indicated to be unavailable by the link availability information based at least in part on the link availability information. ### Claim 9 (depends on 7) The method of claim 7, wherein the method further comprises: receiving link status information for one or more wireless links of the second wireless device; wherein the selecting the first one or more wireless links to communicate with the second wireless device is further based at least in part on the link status information. ### Claim 10 (depends on 9) The method of claim 9, wherein the link status information includes frequency channel information and busy duration information. ### Claim 11 (depends on 9) The method of claim 9, wherein the link status information includes link ID information and busy duration information. ### Claim 12 A baseband processor of a wireless device, wherein the baseband processor is configured to perform operations comprising: determining, based at least in part on link availability of a plurality of wireless links of the wireless device being unknown and one of a power consumption preference configuration of the wireless device or one or more in-device co-existence conditions of the wireless device, the link availability for the plurality of wireless links of the wireless device; generating, based at least in part on the determined link availability for the plurality of wireless links of the wireless device, link availability information, wherein the link availability information includes operating mode indication information for one or more wireless links of the plurality of wireless links of the wireless device; and transmitting the link availability information for the plurality of wireless links of the wireless device using a first wireless link of the wireless device. ### Claim 13 (depends on 12) The baseband processor of claim 12, wherein the link availability information is provided using one or more of: a management frame generated by a media access control (MAC) layer of the wireless device; or one or more A-Control subfields. ### Claim 14 (depends on 12) The baseband processor of claim 12, wherein the link availability information includes a link ID bitmap, wherein the link ID bitmap includes a 1-bit indicator of link availability for a respective link ID of a plurality of link IDs. ### Claim 15 (depends on 12) The baseband processor of claim 12, wherein the link availability information includes operating mode indication information for each of a plurality of link IDs of the wireless device. ### Claim 16 (depends on 12) The baseband processor of claim 12, wherein the baseband processor is further configured to perform operations comprising: receiving link availability information for a plurality of wireless links of a second wireless device; communicating with the second wireless device using a wireless link indicated to be available by the link availability information for the plurality of wireless links of the second wireless device based at least in part on the link availability information for the plurality of wireless links of the second wireless device. ### Claim 17 (depends on 12) The baseband processor of claim 12, wherein the baseband processor is further configured to perform operations comprising: receiving link availability information for a plurality of wireless links of a second wireless device; stopping communicating with the second wireless device using a wireless link indicated to be unavailable by the link availability information for the plurality of wireless links of the second wireless device based at least in part on the link availability information for the plurality of wireless links of the second wireless device. ### Claim 18 (depends on 12) The baseband processor of claim 12, wherein the baseband processor is further configured to perform operations comprising: transmitting link status information for a second wireless link of the wireless device using the first wireless link, wherein the link status information includes busy duration information and one or more of link ID information for the second wireless link or channel information for a frequency channel of the second wireless link. ### Claim 19 (depends on 12) The baseband processor of claim 12, wherein the plurality of wireless links include IEEE 802.11 based wireless links. ### Claim 20 (depends on 12) The baseband processor of claim 12, wherein the link availability information is provided using a bitmap included in one or more A-Control subfields, wherein the bitmap includes, for a respective wireless link of the plurality of wireless links, a binary indication of whether the respective wireless link is available.