# US 12,225,613 B2 · Method and apparatus for processing radio-link failure, and computer storage medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,225,613 B2 - Document ID: US12225613B2 - Status: Granted - Kind: B2 - Application number: 17/779,541 - Filed: 2019-11-26 - Published: 2022-12-29 - Granted: 2025-02-11 - Earliest claimed: 2019-11-26 - Assignees: Beijing Xiaomi Mobile Software Co., Ltd. - Applicants: Beijing Xiaomi Mobile Software Co., Ltd. - Inventors: Xing Yang - Web page: https://patentgrep.com/patent/US12225613B2 ## CPC - H04W 76/19: Connection re-establishment - H04W 76/38: triggered by timers - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A method for processing radio-link failure is disclosed. The method includes: recording by user equipment (UE), a reason for a link failure when user equipment (UE) releases a radio resource control (RRC) connection due to expiration of an inactivity timer; and reporting failure information comprising the reason for the link failure. ## Claims ### Claim 1 A method for processing radio-link failure, performed by user equipment (UE) comprising: recording a reason for a link failure when user equipment (UE) releases a radio resource control (RRC) connection due to expiration of an inactivity timer; and reporting failure information comprising the reason for the link failure after the RRC connection is recovered. ### Claim 2 (depends on 1) The method according to claim 1, wherein the inactivity timer comprises: a data inactivity timer and/or a sidelink inactivity timer. ### Claim 3 (depends on 1) A non-transitory computer storage medium, storing an executable instruction, wherein when the executable instruction is executed by a processor, the processor implements the method for processing the radio-link failure according to claim 1. ### Claim 4 (depends on 1) The method for processing the radio-link failure according to claim 1, wherein reporting the failure information comprising the reason for the link failure after the RRC connection is recovered comprises: sending, after the RRC connection is recovered, a prompt message which indicates that the UE has the failure information; receiving a report instruction message returned based on the prompt message; and reporting the failure information comprising the reason for the link failure based on the report instruction message. ### Claim 5 (depends on 1) The method for processing the radio-link failure according to claim 1, wherein the failure information further comprises: timing duration information of the inactivity timer. ### Claim 6 (depends on 1) The method for processing the radio-link failure according to claim 1, wherein the failure information further comprises a serving cell identifier of a serving cell connected with the UE before the RRC connection is released, position information of the UE, a cell radio network temporary identifier (C-RNTI) provided by the serving cell for the UE, and a target cell identifier for handover. ### Claim 7 A method for processing radio-link failure, performed by base station, comprising: issuing inactivity timer information for an inactivity timer configured for user equipment (UE); receiving a prompt message indicating the UE has failure information sent from the UE; returning a report instruction message to the UE based on the prompt message, wherein the report instruction message is used for instructing to report the failure information; and receiving failure information comprising a reason for a link failure reported by the UE; wherein the reason for the link failure is recorded when a radio resource control (RRC) connection is released due to expiration of the inactivity timer. ### Claim 8 (depends on 7) The method for processing the radio-link failure according to claim 7, wherein the inactivity timer comprises: a data inactivity timer and/or a sidelink inactivity timer. ### Claim 9 (depends on 7) An apparatus for processing the radio-link failure, comprising: a processor, and a memory configured to store an executable instruction, and wherein the processor executes the executable instruction to implement the method for processing the radio-link failure according to claim 7. ### Claim 10 (depends on 7) The method for processing the radio-link failure according to claim 7, wherein the failure information further comprises timing duration information of the inactivity timer. ### Claim 11 (depends on 7) The method for processing the radio-link failure according to claim 7, wherein the failure information further comprises a serving cell identifier of a serving cell connected with the UE before the RRC connection is released, position information of the UE, a cell radio network temporary identifier (C-RNTI) provided by the serving cell for the UE, and a target cell identifier for handover. ### Claim 12 (depends on 7) The method for processing the radio-link failure according to claim 7, wherein the method further comprises: determining a failure link and the reason for the link failure according to the failure information, wherein the failure link is a radio link between a base station and the UE, and the reason for the link failure is RRC connection release caused by expiration of the inactivity timer; and determining, based on the reason for the link failure, a measure for optimizing the failure link. ### Claim 13 (depends on 7) A non-transitory computer storage medium, storing an executable instruction, wherein when the executable instruction is executed by a processor, the processor implements the method for processing the radio-link failure according to claim 7. ### Claim 14 An apparatus for processing radio-link failure, comprising: a processor; and a memory configured to store an executable instruction, wherein the processor is configured to: record a reason for a link failure when user equipment (UE) releases a radio resource control (RRC) connection due to expiration of an inactivity timer, and report failure information comprising the reason for the link failure after the RRC connection is recovered. ### Claim 15 (depends on 14) The apparatus for processing the radio-link failure according to claim 14, wherein the inactivity timer comprises at least one of a data inactivity timer or a sidelink inactivity timer. ### Claim 16 (depends on 14) The apparatus for processing the radio-link failure according to claim 14, the processor is configured to: send, after the RRC connection is recovered, a prompt message which indicates that the UE has the failure information; receive a report instruction message returned based on the prompt message; and report the failure information comprising the reason for the link failure based on the report instruction message. ### Claim 17 (depends on 14) The apparatus for processing the radio-link failure according to claim 14, wherein the failure information further comprises: timing duration information of the inactivity timer.