# US 11,310,103 B2 · Method for handling radio link failure (RLF) and terminal device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,310,103 B2 - Document ID: US11310103B2 - Status: Granted - Kind: B2 - Application number: 16/987,938 - Filed: 2020-08-07 - Published: 2020-11-19 - Granted: 2022-04-19 - Earliest claimed: 2018-02-08 - Assignees: Guangdong Oppo Mobile Telecommunications Corp., Ltd. - Applicants: Guangdong Oppo Mobile Telecommunications Corp., Ltd. - Inventors: Cong Shi - Web page: https://patentgrep.com/patent/US11310103B2 ## CPC - H04L 1/1854: {Scheduling and prioritising arrangements} - H04L 41/0677: Localisation of faults - H04L 1/08: by repeating transmission, e.g. Verdan system {(H04L1/1858 and H04L1/189 take precedence)} - H04L 5/00: Arrangements affording multiple use of the transmission path - H04L 69/324: in the data link layer [OSI layer 2], e.g. HDLC - H04W 76/19: Connection re-establishment - H04L 1/1896: {ARQ related signaling} - H04L 1/22: using redundant apparatus to increase reliability - H04W 76/11: Allocation or use of connection identifiers - H04W 76/15: Setup of multiple wireless link connections - 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 Embodiments of the present application disclose a method for handling a radio link failure RLF and a terminal device. The method includes: in a case that data of a first radio bearer reaches a maximum number of retransmissions on a first radio link control RLC entity corresponding to the first radio bearer, deactivating, by a terminal device, a replication data transmission function of the first radio bearer, and/or, deactivating, by a terminal device, a replication data transmission function of a second radio bearer, where a carrier mapped by an RLC entity corresponding to the second radio bearer at least partially overlaps with a carrier mapped by the first RLC entity. ## Claims ### Claim 1 A method for handling a radio link failure (RLF), comprising: in a case that data of a first radio bearer reaches a maximum number of retransmissions on a first radio link control (RLC) entity corresponding to the first radio bearer, deactivating, by a terminal device, a replication data transmission function of the first radio bearer, and deactivating, by the terminal device, a replication data transmission function of a second radio bearer, wherein a carrier mapped by an RLC entity corresponding to the second radio bearer at least partially overlaps with a carrier mapped by the first RLC entity. ### Claim 2 (depends on 1) The method according to claim 1, wherein the deactivating, by the terminal device, the replication data transmission function of the first radio bearer comprises: stopping, by the terminal device, a packet data convergence protocol (PDCP) entity of the first radio bearer from replicating a PDCP protocol data unit (PDU); stopping, by the terminal device, delivering data to the first RLC entity; and delivering, by the terminal device, data to a second RLC entity corresponding to the first radio bearer. ### Claim 3 (depends on 1) The method according to claim 1, wherein the method further comprises: sending, by the terminal device, indication information to a network device, wherein the indication information comprises at least one of: indication information for indicating that a radio link failure RLF occurs on the first radio bearer, and indication information for indicating an identifier of a radio bearer whose replication data transmission function is deactivated by the terminal device. ### Claim 4 (depends on 1) The method according to claim 1, wherein the first radio bearer and the second radio bearer correspond to a same cell group or to different cell groups. ### Claim 5 (depends on 4) The method according to claim 4, wherein the cell group comprises at least one of: a master cell group (MCG) and a secondary cell group (SCG). ### Claim 6 (depends on 1) The method according to claim 1, wherein an operating mode of the first RLC entity is an acknowledged mode (AM), and an operating mode of the RLC entity corresponding to the second radio bearer is an acknowledged mode (AM) or an unacknowledged mode (UM). ### Claim 7 (depends on 1) The method according to claim 1, wherein the first RLC entity is a primary link of the first radio bearer, and the second RLC entity corresponding to the first radio bearer is a secondary link of the first radio bearer; or the first RLC entity is a secondary link of the first radio bearer, and the second RLC entity is a primary link of the first radio bearer. ### Claim 8 A terminal device, comprising: a processor and a memory, wherein the memory is used to store instructions, the processor is used to execute the instructions in the memory and is configured to: in a case that data of a first radio bearer reaches a maximum number of retransmissions on a first radio link control (RLC) entity corresponding to the first radio bearer, deactivate a replication data transmission function of the first radio bearer, and deactivate a replication data transmission function of a second radio bearer, wherein a carrier mapped by an RLC entity corresponding to the second radio bearer at least partially overlaps with a carrier mapped by the first RLC entity. ### Claim 9 (depends on 8) The terminal device according to claim 8, wherein the processor is specifically configured to: stop a packet data convergence protocol (PDCP) entity of the first radio bearer from replicating a PDCP protocol data unit (PDU); stop delivering data to the first RLC entity, and deliver data to a second RLC entity corresponding to the first radio bearer. ### Claim 10 (depends on 8) The terminal device according to claim 8, wherein the processor is configured to control an output interface to send indication information to a network device, wherein the indication information comprises at least one of: indication information for indicating that a radio link failure (RLF) occurs on the first radio bearer, and indication information for indicating an identifier of a radio bearer whose replication data transmission function is deactivated by the terminal device. ### Claim 11 (depends on 8) The terminal device according to claim 8, wherein the first radio bearer and the second radio bearer correspond to a same cell group or to different cell groups. ### Claim 12 (depends on 11) The terminal device according to claim 11, wherein the cell group comprises at least one of: a master cell group (MCG) and a secondary cell group (SCG). ### Claim 13 (depends on 8) The terminal device according to claim 8, wherein an operating mode of the first RLC entity is an acknowledged mode (AM), and an operating mode of the RLC entity corresponding to the second radio bearer is an acknowledged mode (AM) or an unacknowledged mode (UM). ### Claim 14 (depends on 8) The terminal device according to claim 8, wherein the first RLC entity is a primary link of the first radio bearer, and the second RLC entity corresponding to the first radio bearer is a secondary link of the first radio bearer; or the first RLC entity is a secondary link of the first radio bearer, and the second RLC entity is a primary link of the first radio bearer. ### Claim 15 (depends on 1) A non-transitory computer storage medium, used to store computer software instructions for executing the method for handling a radio link failure (RLF) according to claim 1. ### Claim 16 (depends on 15) The non-transitory computer storage medium according to claim 15, wherein the deactivating, by the terminal device, the replication data transmission function of the first radio bearer comprises: stopping, by the terminal device, a packet data convergence protocol (PDCP) entity of the first radio bearer from replicating a PDCP protocol data unit (PDU); stopping, by the terminal device, delivering data to the first RLC entity, and delivering, by the terminal device, data to a second RLC entity corresponding to the first radio bearer. ### Claim 17 (depends on 15) The non-transitory computer storage medium according to claim 15, wherein the computer software instructions are further used to execute the following step: sending, by the terminal device, indication information to a network device, wherein the indication information comprises at least one of: indication information for indicating that a radio link failure (RLF) occurs on the first radio bearer, and indication information for indicating an identifier of a radio bearer whose replication data transmission function is deactivated by the terminal device. ### Claim 18 (depends on 15) The non-transitory computer storage medium according to claim 15, wherein the first radio bearer and the second radio bearer correspond to a same cell group or to different cell groups. ### Claim 19 (depends on 18) The non-transitory computer storage medium according to claim 18, wherein the cell group comprises at least one of: a master cell group (MCG) and a secondary cell group (SCG).