# US 2024/0205121 A1 · Method and device used for wireless communication > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2024/0205121 A1 - Document ID: US20240205121A1 - Status: Published application - Kind: A1 - Application number: 18/504,171 - Filed: 2023-11-08 - Published: 2024-06-20 - Earliest claimed: 2022-11-16 - Assignees: Shanghai Langbo Communication Technology Company Limited - Inventors: Jinfang ZHANG; Xiaobo ZHANG - Web page: https://patentgrep.com/patent/US20240205121A1 ## CPC - H04L 43/0811: by checking connectivity - H04W 76/15: Setup of multiple wireless link connections - H04W 76/19: Connection re-establishment - H04W 76/20: Manipulation of established connections - H04W 80/02: Data link layer protocols - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract The present application provides a method and device for wireless communications. A first node receives a first message, the first message is used to configure at least first RLC bearer; receives a second message, the second message indicates that the at least first RLC bearer is a candidate of multiple radio bearers; monitors whether any RLC bearer in multiple RLC bearers is failed, and the multiple RLC bearers are associated with the multiple radio bearers; as a response to monitoring failure of a second RLC bearer, transmits a first data unit set through the first RLC bearer, the first data unit set belongs to a first radio bearer; the second RLC bearer is associated with the first radio bearer, the first radio bearer is one of the multiple radio bearers. The present application can reduce RLC bearer space while reducing service interruption and improving transmission robustness. ## Claims ### Claim 1 A first node for wireless communications, comprising: a first receiver, receiving a first message, the first message being used to configure at least a first RLC bearer; receiving a second message, the second message indicating that the at least first RLC bearer is a candidate of multiple radio bearers; monitoring whether any RLC bearer in multiple RLC bearers is failed, the multiple RLC bearers being associated with the multiple radio bearers; and a first processor, as a response to monitoring failure of a second RLC bearer, transmitting a first data unit set through the first RLC bearer, the first data unit set belonging to a first radio bearer; the second RLC bearer being associated with the first radio bearer, and the first radio bearer being one of the multiple radio bearers; the second RLC bearer being one of the multiple RLC bearers; wherein the second message is an RRC-layer signaling; the first data unit set comprises at least one data unit. ### Claim 2 (depends on 1) The first node according to claim 1, wherein each data unit in the first data unit set is used to generate a MAC subPDU, the MAC subPDU comprises a MAC subheader, the MAC subheader comprises a first field, a second field and a third field, the first field indicates that there exists the second field, and the second field indicates the first radio bearer; the third field indicates the first RLC bearer. ### Claim 3 (depends on 1) The first node according to claim 1, wherein at least one of serving cells allowed by the first RLC bearer does not belong to serving cells allowed by the second RLC bearer; wherein the first RLC bearer and the second RLC bearer belong to a same cell group. ### Claim 4 (depends on 1) The first node according to claim 1, wherein the first RLC bearer and the second RLC bearer belong to different cell groups. ### Claim 5 (depends on 1) The first node according to claim 1, comprising: the first processor, transmitting a third message, the third message indicating the second RLC bearer failure; wherein the third message is an RRC message. ### Claim 6 (depends on 5) The first node according to claim 5, wherein the third message indicates the first RLC bearer. ### Claim 7 (depends on 5) The first node according to claim 5, comprising: the first receiver, receiving a fourth message, the fourth message confirming that the first RLC bearer is associated with the first radio bearer; wherein the third message is used to trigger the fourth message; a transmission of the first data unit set is earlier than a reception of the fourth message. ### Claim 8 A second node for wireless communications, comprising: a first transmitter, transmitting a first message, the first message being used to configure at least a first RLC bearer; transmitting a second message, the second message indicating that the at least first RLC bearer is a candidate of multiple radio bearers; wherein whether any RLC bearer in multiple RLC bearers is failed is monitored, and the multiple RLC bearers are associated with the multiple radio bearers; when second RLC bearer failure is monitored, a first data unit set is transmitted through the first RLC bearer, the first data unit set belongs to a first radio bearer; the second RLC bearer is associated with the first radio bearer, and the first radio bearer is one of the multiple radio bearers; the second RLC bearer is one of the multiple RLC bearers; the second message is an RRC-layer signaling; the first data unit set comprises at least one data unit. ### Claim 9 (depends on 8) The second node according to claim 8, wherein each data unit in the first data unit set is used to generate a MAC subPDU, the MAC subPDU comprises a MAC subheader, the MAC subheader comprises a first field, a second field and a third field, the first field indicates that there exists the second field, and the second field indicates the first radio bearer; the third field indicates the first RLC bearer. ### Claim 10 (depends on 8) The second node according to claim 8, wherein at least one of serving cells allowed by the first RLC bearer does not belong to serving cells allowed by the second RLC bearer; wherein the first RLC bearer and the second RLC bearer belong to a same cell group. ### Claim 11 (depends on 8) The second node according to claim 8, wherein the first RLC bearer and the second RLC bearer belong to different cell groups. ### Claim 12 (depends on 8) The second node according to claim 8, comprising: a second processor, receiving a third message, the third message indicating the second RLC bearer failure; wherein the third message is an RRC message. ### Claim 13 (depends on 12) The second node according to claim 12, comprising: the first transmitter, transmitting a fourth message, the fourth message confirming that the first RLC bearer is associated with the first radio bearer; wherein the third message is used to trigger the fourth message; a transmission of the first data unit set is earlier than a reception of the fourth message. ### Claim 14 A method in a first node for wireless communications, comprising: receiving a first message, the first message being used to configure at least a first RLC bearer; receiving a second message, the second message indicating that the at least first RLC bearer is a candidate of multiple radio bearers; monitoring whether any RLC bearer in multiple RLC bearers is failed, the multiple RLC bearers being associated with the multiple radio bearers; and as a response to monitoring failure of a second RLC bearer, transmitting a first data unit set through the first RLC bearer, the first data unit set belonging to a first radio bearer; the second RLC bearer being associated with the first radio bearer, and the first radio bearer being one of the multiple radio bearers; the second RLC bearer being one of the multiple RLC bearers; wherein the second message is an RRC-layer signaling; the first data unit set comprises at least one data unit. ### Claim 15 (depends on 14) The method in a first node according to claim 14, wherein each data unit in the first data unit set is used to generate a MAC subPDU, the MAC subPDU comprises a MAC subheader, the MAC subheader comprises a first field, a second field and a third field, the first field indicates that there exists the second field, and the second field indicates the first radio bearer; the third field indicates the first RLC bearer. ### Claim 16 (depends on 14) The method in a first node according to claim 14, wherein at least one of serving cells allowed by the first RLC bearer does not belong to serving cells allowed by the second RLC bearer; wherein the first RLC bearer and the second RLC bearer belong to a same cell group. ### Claim 17 (depends on 14) The method in a first node according to claim 14, wherein the first RLC bearer and the second RLC bearer belong to different cell groups. ### Claim 18 (depends on 14) The method in a first node according to claim 14, comprising: transmitting a third message, the third message indicating the second RLC bearer failure; wherein the third message is an RRC message. ### Claim 19 (depends on 18) The method in a first node according to claim 18, wherein the third message indicates the first RLC bearer. ### Claim 20 (depends on 18) The method in a first node according to claim 18, comprising: receiving a fourth message, the fourth message confirming that the first RLC bearer is associated with the first radio bearer; wherein the third message is used to trigger the fourth message; a transmission of the first data unit set is earlier than a reception of the fourth message.