# US 12,120,763 B2 · Mapping of TID and link in multi-link > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,120,763 B2 - Document ID: US12120763B2 - Status: Granted - Kind: B2 - Application number: 18/210,913 - Filed: 2023-06-16 - Published: 2023-10-19 - Granted: 2024-10-15 - Earliest claimed: 2019-07-02 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Insun Jang; Jeongki Kim; Jinsoo Choi; Suhwook Kim; Sungjin Park; Taewon Song - Web page: https://patentgrep.com/patent/US12120763B2 ## CPC - H04W 28/0263: {involving mapping traffic to individual bearers or channels, e.g. traffic flow template [TFT]} - H04W 76/15: Setup of multiple wireless link connections - H04L 1/1621: {Group acknowledgement, i.e. the acknowledgement message defining a range of identifiers, e.g. of sequence numbers} - H04W 72/1263: Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows - H04W 76/11: Allocation or use of connection identifiers - H04L 1/1614: {using bitmaps} - 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) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract In a wireless local area network (LAN) system, a station (STA) may transmit a first physical protocol data unit (PPDU) including information indicating that a first traffic identifier (TID) is mapped to a first link and a second TID is mapped to a second link. The STA may transmit traffic pertaining to the first TID through only the first link, and traffic pertaining to the second TID through only the second link. ## Claims ### Claim 1 A method in a wireless local area network (WLAN) system, the method comprising: transmitting, by a first multilink device (MLD) to a second MLD, a management frame comprising a multi-link element and a Traffic Identifier (TID)-to-link mapping element, wherein the multi-link element includes a control field related to whether TID-to-link mapping is supported and a value of the control field is set based on whether the TID-to-link mapping is supported, and wherein the TID-to-link mapping element includes a first link mapping information field indicating at least one link on which a frame belonging to a first TID is allowed to be transmitted, and a value of the first TID is one of zero (0) to seven (7); transmitting, by the first MLD to the second MLD, an Add Block Acknowledgment (ADDBA) request frame indicating the first TID for which a block acknowledgment (BA) agreement is being set up; and in response to the ADDBA request frame, receiving, by the first MLD from the second MLD, an ADDBA response frame, wherein an BA agreement for the first TID is established between the first MLD and the second MLD based on the ADDBA request frame and the ADDBA response frame, and wherein based on the BA agreement for the first TID, a data frame for the first TID is exchanged between the first MLD and the second MLD on any link to which the first TID is mapped. ### Claim 2 (depends on 1) The method of claim 1, wherein the ADDBA request frame includes at least one parameter for transmitting a BA signal related to the first TID. ### Claim 3 (depends on 1) The method of claim 1, wherein the first multilink MLD is a non-access point MLD and includes at least one non-access point station. ### Claim 4 (depends on 1) The method of claim 1, wherein the second multilink MLD is an access point MLD and includes at least one access point station. ### Claim 5 (depends on 1) The method of claim 1, wherein the management frame is transmitted on one of a 2.4 GHz link, a 5 GHz link, and a 6 GHz link. ### Claim 6 A first multilink device (MLD) in a wireless local area network (WLAN) system, comprising: a memory; and a processor operatively coupled to the memory, wherein the processor is adapted to: transmit, to a second MLD, a management frame comprising a multi-link element and a Traffic Identifier (TID)-to-link mapping element, wherein the multi-link element includes a control field related to whether TID-to-link mapping is supported and a value of the control field is set based on whether the TID-to-link mapping is supported, and wherein the TID-to-link mapping element includes a first link mapping information field indicating at least one link on which a frame belonging to the first TID is allowed to be transmitted, and a value of the first TID is one of zero (0) to seven (7); transmit, to the second MLD, an Add Block Acknowledgment (ADDBA) request frame indicating the first TID for which a block acknowledgment (BA) agreement is being set up; and in response to the ADDBA request frame, receive, from the second MLD, an ADDBA response frame, wherein an BA agreement for the first TID is established between the first MLD and the second MLD based on the ADDBA request frame and the ADDBA response frame, and wherein based on the BA agreement for the first TID, a data frame for the first TID is exchanged between the first MLD and the second MLD on any link to which the first TID is mapped. ### Claim 7 (depends on 6) The first MLD of claim 6, wherein the ADDBA request frame includes at least one parameter for transmitting a BA signal related to the first TID. ### Claim 8 (depends on 6) The first MLD of claim 6, wherein the first multilink MLD is a non-access point MLD and includes at least one non-access point station. ### Claim 9 (depends on 6) The first MLD of claim 6, wherein the second multilink MLD is an access point MLD and includes at least one access point station. ### Claim 10 (depends on 6) The first MLD of claim 6, wherein the management frame is transmitted on one of a 2.4 GHz link, a 5 GHz link, and a 6 GHz link. ### Claim 11 A first multilink device (MLD) in a wireless local area network (WLAN) system, comprising: a memory; and a processor operatively coupled to the memory, wherein the processor is adapted to: receive, from a second MLD, a management frame comprising a multi-link element and a Traffic Identifier (TID)-to-link mapping element, wherein the multi-link element includes a control field related to whether TID-to-link mapping is supported and a value of the control field is set based on whether the TID-to-link mapping is supported, and wherein the TID-to-link mapping element includes a first link mapping information field indicating at least one link on which a frame belonging to the first TID is allowed to be transmitted; receive, from the second MLD, an Add Block Acknowledgment (ADDBA) request frame indicating the first TID for which a block acknowledgment (BA) agreement is being set up; and in response to the ADDBA request frame, transmit, to the second MLD, an ADDBA response frame, wherein an BA agreement for the first TID is established between the first MLD and the second MLD based on the ADDBA request frame and the ADDBA response frame, and wherein based on the BA agreement for the first TID, a data frame for the first TID is exchanged between the first MLD and the second MLD on any link to which the first TID is mapped. ### Claim 12 (depends on 11) The first MLD of claim 11, wherein the ADDBA request frame includes at least one parameter for transmitting a BA signal related to the first TID. ### Claim 13 (depends on 11) The first MLD of claim 11, wherein the first multilink MLD is an access point MLD and includes at least one access point station. ### Claim 14 (depends on 11) The first MLD of claim 11, wherein the second multilink MLD is a non-access point MLD and includes at least one non-access point station. ### Claim 15 (depends on 11) The first MLD of claim 11, wherein the Association Request frame is transmitted on one of a 2.4 GHz link, a 5 GHz link, and a 6 GHz link.