# US 12,598,522 B2 · Sidelink radio link management > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,598,522 B2 - Document ID: US12598522B2 - Status: Granted - Kind: B2 - Application number: 19/040,149 - Filed: 2025-01-29 - Published: 2025-05-29 - Granted: 2026-04-07 - Earliest claimed: 2022-08-09 - Assignees: Ofinno, LLC - Applicants: Ofinno, LLC - Inventors: Kyungmin Park; Jongwoo Hong; Esmael Hejazi Dinan; SungDuck Chun; Hyoungsuk Jeon; Taehun Kim; Jian Xu - Web page: https://patentgrep.com/patent/US12598522B2 ## CPC - H04W 36/0079: {in case of hand-off failure or rejection} - H04W 76/14: Direct-mode setup - H04L 1/1812: Hybrid protocols; Hybrid automatic repeat request [HARQ] - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04W 76/19: Connection re-establishment - 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 A first wireless device receives, from a base station, one or more messages indicating a threshold number of radio link control (RLC) packet retransmissions associated with a sidelink radio link failure, wherein: the first wireless device has a radio resource control (RRC) connection with a second wireless device; a first logical channel is associated with one or more first carrier frequencies; and a second logical channel is associated with one or more second carrier frequencies. After a number of retransmissions of an RLC packet associated with the first logical channel reaches a threshold number, the first wireless device determines a connection failure of the RRC connection and transmits, to a base station, an indication of the connection failure. ## Claims ### Claim 1 A method comprising: receiving, by a first wireless device from a base station, one or more messages indicating a threshold number of radio link control (RLC) packet retransmissions associated with a sidelink radio link failure, wherein: the first wireless device has a radio resource control (RRC) connection with a second wireless device; a first logical channel is associated with one or more first carrier frequencies; and a second logical channel is associated with one or more second carrier frequencies; transmitting by the first wireless device to the second wireless device: first packets associated with the first logical channel via the one or more first carrier frequencies; and second packets associated with the second logical channel via the one or more second carrier frequencies, wherein the second packets are duplications of the first packets; after a number of retransmissions of an RLC packet associated with the first logical channel reaches the threshold number, determining, by the first wireless device, a connection failure of the RRC connection between the first wireless device and the second wireless device; and transmitting, to the base station, an indication of the connection failure associated with the second wireless device. ### Claim 2 (depends on 1) The method of claim 1, wherein the connection failure of the RRC connection between the first wireless device and the second wireless device comprises the sidelink radio link failure. ### Claim 3 (depends on 1) The method of claim 1, wherein determining the connection failure is based on the threshold number being reached for at least one logical channel of at least one carrier frequency. ### Claim 4 (depends on 3) The method of claim 3, wherein the at least one carrier frequency comprises the one or more first carrier frequencies and the one or more second carrier frequencies. ### Claim 5 (depends on 3) The method of claim 3, wherein the at least one logical channel of every carrier frequency comprises the first logical channel and the second logical channel. ### Claim 6 (depends on 1) The method of claim 1, wherein the first wireless device communicates a hybrid automatic repeat request (HARQ) feedback and/or a sidelink control information (SCI) with the second wireless device. ### Claim 7 (depends on 6) The method of claim 6, wherein the HARQ feedback and/or the SCI is: communicated via a primary carrier frequency; or not communicated via a non-primary carrier frequency. ### Claim 8 A first wireless device comprising one or more processors and memory storing instructions that, when executed by the one or more processors, cause the first wireless device to: receive, from a base station, one or more messages indicating a threshold number of radio link control (RLC) packet retransmissions associated with a sidelink radio link failure, wherein: the first wireless device has a radio resource control (RRC) connection with a second wireless device; a first logical channel is associated with one or more first carrier frequencies; and a second logical channel is associated with one or more second carrier frequencies; transmit, to the second wireless device: first packets associated with the first logical channel via the one or more first carrier frequencies; and second packets associated with the second logical channel via the one or more second carrier frequencies, wherein the second packets are duplications of the first packets; after a number of retransmissions of an RLC packet associated with the first logical channel reaches the threshold number, determine a connection failure of the RRC connection between the first wireless device and the second wireless device; and transmit, to the base station, an indication of the connection failure associated with the second wireless device. ### Claim 9 (depends on 8) The first wireless device of claim 8, wherein the connection failure of the RRC connection between the first wireless device and the second wireless device is the sidelink radio link failure. ### Claim 10 (depends on 8) The first wireless device of claim 8, wherein determining the connection failure is based on the threshold number being reached for at least one logical channel of at least one carrier frequency. ### Claim 11 (depends on 10) The first wireless device of claim 10, wherein the at least one carrier frequency comprises the one or more first carrier frequencies and the one or more second carrier frequencies. ### Claim 12 (depends on 10) The first wireless device of claim 10, wherein the at least one logical channel of every carrier frequency comprises the first logical channel and the second logical channel. ### Claim 13 (depends on 8) The first wireless device of claim 8, wherein the first wireless device communicates a hybrid automatic repeat request (HARQ) feedback and/or a sidelink control information (SCI) with the second wireless device. ### Claim 14 (depends on 13) The first wireless device of claim 13, wherein the HARQ feedback and/or the SCI is: communicated via a primary carrier frequency; or not communicated via a non-primary carrier frequency. ### Claim 15 A non-transitory computer-readable medium comprising instructions that, when executed by one or more processors of a first wireless device, cause the first wireless device to: receive, from a base station, one or more messages indicating a threshold number of radio link control (RLC) packet retransmissions associated with a sidelink radio link failure, wherein: the first wireless device has a radio resource control (RRC) connection with a second wireless device; a first logical channel is associated with one or more first carrier frequencies; and a second logical channel is associated with one or more second carrier frequencies; transmit, to the second wireless device: first packets associated with the first logical channel via the one or more first carrier frequencies; and second packets associated with the second logical channel via the one or more second carrier frequencies, wherein the second packets are duplications of the first packets; after a number of retransmissions of an RLC packet associated with the first logical channel reaches the threshold number, determine a connection failure of the RRC connection between the first wireless device and the second wireless device; and transmit, to the base station, an indication of the connection failure associated with the second wireless device. ### Claim 16 (depends on 15) The non-transitory computer-readable medium of claim 15, wherein the connection failure of the RRC connection between the first wireless device and the second wireless device is the sidelink radio link failure. ### Claim 17 (depends on 15) The non-transitory computer-readable medium of claim 15, wherein determining the connection failure is based on the threshold number being reached for at least one logical channel of at least one carrier frequency. ### Claim 18 (depends on 17) The non-transitory computer-readable medium of claim 17, wherein the at least one carrier frequency comprises the one or more first carrier frequencies and the one or more second carrier frequencies. ### Claim 19 (depends on 17) The non-transitory computer-readable medium of claim 17, wherein the at least one logical channel of every carrier frequency comprises the first logical channel and the second logical channel. ### Claim 20 (depends on 15) The non-transitory computer-readable medium of claim 15, wherein the first wireless device communicates a hybrid automatic repeat request (HARQ) feedback and/or a sidelink control information (SCI) with the second wireless device.