# US 11,452,015 B2 · Method and apparatus for triggering transmission carrier reselection procedure for deactivated duplication in wireless communication system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,452,015 B2 - Document ID: US11452015B2 - Status: Granted - Kind: B2 - Application number: 17/254,838 - Filed: 2019-08-08 - Published: 2021-08-26 - Granted: 2022-09-20 - Earliest claimed: 2018-08-10 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Youngdae Lee; Taehun Kim; Jongwoo Hong - Web page: https://patentgrep.com/patent/US11452015B2 ## CPC - H04W 36/0027: {for a plurality of data sessions of end-to-end connections, e.g. multi-call or multi-bearer end-to-end data connections} - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04W 36/06: Reselecting a communication resource in the serving access point - H04W 72/1263: Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows - H04W 72/535: {based on resource usage policies} - H04W 80/02: Data link layer protocols - 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 and apparatus for triggering a transmission carrier reselection procedure for deactivated duplication in a wireless communication is provided. A wireless device selects a first carrier carrying a data unit, and selects a second carrier carrying a duplication of the data unit based on activation of the duplication of the data unit. The wireless device triggers a carrier reselection procedure based on deactivation of the duplication of the data unit. ## Claims ### Claim 1 A method performed by a wireless device configured to operate in a wireless communication system, the method comprising: receiving a configuration of one or more carriers from a network; activating and performing, at a packet data convergence protocol (PDCP) entity of the wireless device, a duplication of a data unit based on sending the data unit to both a first radio link control (RLC) entity and a second RLC entity, wherein the first RLC entity is associated with a first logical channel, and wherein the second RLC entity is associated with a second logical channel; selecting a first carrier, from the one or more carriers, related to the first logical channel; based on the duplication of the data unit, selecting a second carrier, from the one or more carriers, related to the second logical channel which is different from the first logical channel; performing a sidelink transmission of the data unit with the duplication on both the first carrier and the second carrier; and upon deactivation of the duplication of the data unit at the PDCP entity, triggering a carrier reselection based on i) the second carrier being selected only for the second logical channel and ii) data being not available for the second logical channel. ### Claim 2 (depends on 1) The method of claim 1, wherein triggering the carrier reselection comprises not selecting the second carrier. ### Claim 3 (depends on 1) The method of claim 1, wherein the data being not available for the second logical channel is based on whether the data is available in a layer-2 (L2) buffer or not. ### Claim 4 (depends on 3) The method of claim 3, wherein the L2 buffer includes a packet data convergence protocol (PDCP) buffer, a radio link control (RLC) buffer, or a hybrid automatic repeat request (HARD) buffer. ### Claim 5 (depends on 1) The method of claim 1, wherein the carrier reselection is triggered when the second carrier is selected for other logical channels as well as the second logical channel and data is not available for the other logical channels and the second logical channel. ### Claim 6 (depends on 1) The method of claim 1, wherein the carrier reselection is triggered when the second carrier is selected only either for the second logical channel or for deactivated or release logical channel. ### Claim 7 (depends on 1) The method of claim 1, wherein the wireless device is in communication with at least one of a user equipment, a network, and/or autonomous vehicles other than the wireless device. ### Claim 8 A wireless device configured to operate in a wireless communication system, the wireless device comprising: a memory; a transceiver; and a processor, operably coupled to the memory and the transceiver, and configured to perform operations comprising: receiving a configuration of one or more carriers from a network; activating and performing, at a packet data convergence protocol (PDCP) entity of the wireless device, a duplication of a data unit based on sending the data unit to both a first radio link control (RLC) entity and a second RLC entity, wherein the first RLC entity is associated with a first logical channel, and wherein the second RLC entity is associated with a second logical channel; selecting a first carrier, from the one or more carriers, related to the first logical channel; based on the duplication of the data unit, selecting a second carrier, from the one or more carriers, related to the second logical channel which is different from the first logical channel; performing a sidelink transmission of the data unit with the duplication on both the first carrier and the second carrier; and upon deactivation of the duplication of the data unit at the PDCP entity, triggering a carrier reselection based on i) the second carrier being selected only for the second logical channel and ii) data being not available for the second logical channel.