# US 12,772,328 B2 · Method and apparatus for sidelink communication > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,772,328 B2 - Document ID: US12772328B2 - Status: Granted - Kind: B2 - Application number: 18/283,973 - Filed: 2021-04-01 - Published: 2024-05-16 - Granted: 2026-10-20 - Earliest claimed: 2021-04-01 - Assignees: Lenovo (Beijing) Limited - Applicants: Lenovo (Beijing) Limited - Inventors: Jing Han; Congchi Zhang; Ran Yue; Mingzeng Dai; Lianhai Wu; Haiming Wang - Web page: https://patentgrep.com/patent/US12772328B2 ## CPC - H04W 76/28: Discontinuous transmission [DTX]; Discontinuous reception [DRX] - H04W 72/25: between terminals via a wireless link, e.g. sidelink - 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 Embodiments of the present application relate to methods and apparatuses for sidelink (SL) communication. According to an embodiment of the present application, a method may include: obtaining, by a remote device, a plurality of SL DRX configurations for SL communication; determining, by the remote device, one or more SL DRX configurations from the plurality of SL DRX configurations for a medium access control (MAC) layer of the remote device; and in the case that there is SL data associated with DRX in the remote device, transmitting the SL data from the remote device based on active time derived in each of the one or more SL DRX configurations. Embodiments of the present application determine three kinds of granularity for SL DRX configuration for broadcast and groupcast communication and propose how to determine SL DRX configuration for three kinds of granularity. ## Claims ### Claim 1 A method performed by a user equipment (UE), the method comprising: obtaining a plurality of sidelink (SL) discontinuous reception (DRX) configurations for SL communication, wherein the plurality of SL DRX configurations are configured based at least in part on a quality of service (QoS) related parameter; obtaining, at a medium access control (MAC) layer of the UE from a higher layer of the UE, a mapping relationship between the QoS related parameter and at least one layer 2 (L2) destination identity (ID) associated with the MAC layer of the UE; determining, at the MAC layer of the UE and based at least in part on the mapping relationship, one or more SL DRX configurations of the plurality of SL DRX configurations for the at least one L2 destination ID associated with the MAC layer of the UE; and transmitting SL data based at least in part on respective active times associated with the one or more SL DRX configurations. ### Claim 2 (depends on 1) The method of claim 1, wherein the one or more SL DRX configurations comprise the plurality of SL DRX configurations, and wherein transmitting the SL data comprises: selecting, during a logical channel prioritization (LCP) procedure, an L2 destination ID associated with an SL DRX configuration of the one or more SL DRX configurations, wherein the SL DRX configuration is in at least one active time of the respective active times. ### Claim 3 A user equipment (UE) for wireless communication, comprising: at least one memory; and at least one processor coupled with the at least one memory and configured to cause the UE to: obtain a plurality of sidelink (SL) discontinuous reception (DRX) configurations for SL communication, wherein the plurality of SL DRX configurations are configured based at least in part on a quality of service (QoS) related parameter; obtain, at a medium access control (MAC) layer of the UE from a higher layer of the UE, a mapping relationship between the QoS related parameter and at least one layer 2 (L2) destination identity (ID) associated with the MAC layer of the UE; determine, at the MAC layer of the UE and based at least in part on the mapping relationship, one or more SL DRX configurations of the plurality of SL DRX configurations for the at least one L2 destination ID associated with the MAC layer of the UE; and receive SL data based at least in part on respective active times associated with the one or more SL DRX configurations. ### Claim 4 (depends on 3) The UE of claim 3, wherein the one or more SL DRX configurations comprise the plurality of SL DRX configurations, wherein an L2 destination ID associated with an SL DRX configuration of the one or more SL DRX configurations is selected during a logical channel prioritization (LCP) procedure, and wherein the SL DRX configuration is in at least one active time of the respective active times. ### Claim 5 (depends on 3) The UE of claim 3, wherein to determine the one or more SL DRX configurations, the at least one processor is configured to cause the UE to: determine, for respective logical channels of a plurality of logical channels and at a radio resource control (RRC) layer of the UE, at least one SL DRX configuration from the plurality of SL DRX configurations based at least in part on a first additional mapping relationship between the QoS related parameter and a sidelink radio bearer (SLRB) and a second additional mapping relationship between the SLRB and the respective logical channels. ### Claim 6 (depends on 5) The UE of claim 5, wherein the at least one processor is further configured to cause the UE to: determine, for the respective logical channels and at the RRC layer, one SL DRX configuration from the at least one SL DRX configuration based at least in part on a pre-defined rule. ### Claim 7 (depends on 3) The UE of claim 3, wherein one or more logical channels are selected during a logical channel prioritization (LCP) procedure, and wherein respective SL DRX configurations associated with the one or more logical channels are in at least one active time of the respective active times. ### Claim 8 (depends on 3) The UE of claim 3, wherein the one or more SL DRX configurations are determined for respective L2 destination IDs of the at least one L2 destination ID at a radio resource control (RRC) layer of the UE. ### Claim 9 (depends on 3) The UE of claim 3, wherein the plurality of SL DRX configurations are configured based at least in part on one or more of a sidelink radio bearer (SLRB), a radio link control (RLC) bearer, or a logical channel (LCH), and wherein to determine the one or more SL DRX configurations, the at least one processor is configured to cause the UE to: determine, at the MAC layer, the one or more SL DRX configurations to be the plurality of SL DRX configurations. ### Claim 10 (depends on 9) The UE of claim 9, wherein to determine the one or more SL DRX configurations, the at least one processor is configured to cause the UE to: determine, for respective L2 destination IDs of the at least one L2 destination ID, one SL DRX configuration associated with the respective L2 destination IDs based at least in part on a pre-defined rule, wherein the plurality of SL DRX configurations comprise the one SL DRX configuration, wherein an L2 destination ID of the at least one L2 destination ID is selected during a logical channel prioritization (LCP) procedure, and wherein an SL DRX configuration associated with the L2 destination ID is in at least one active time of the respective active times. ### Claim 11 A user equipment (UE) for wireless communication, comprising: at least one memory; and at least one processor coupled with the at least one memory and configured to cause the UE to: obtain a plurality of sidelink (SL) discontinuous reception (DRX) configurations for SL communication, wherein the plurality of SL DRX configurations are configured based at least in part on a quality of service (QoS) related parameter; obtain, at a medium access control (MAC) layer of the UE from a higher layer of the UE, a mapping relationship between the QoS related parameter and at least one layer 2 (L2) destination identity (ID) associated with the MAC layer of the UE; determine, at the MAC layer of the UE and based at least in part on the mapping relationship, one or more SL DRX configurations of the plurality of SL DRX configurations for the at least one L2 destination ID associated with the MAC layer of the UE; and transmit SL data based at least in part on respective active times associated with the one or more SL DRX configurations. ### Claim 12 (depends on 11) The UE of claim 11, wherein the one or more SL DRX configurations comprise the plurality of SL DRX configurations, and wherein to transmit the SL data, the at least one processor is configured to cause the UE to: select, during a logical channel prioritization (LCP) procedure, an L2 destination ID associated with an SL DRX configuration of the one or more SL DRX configurations, wherein the SL DRX configuration is in at least one active time of the respective active times. ### Claim 13 (depends on 11) The UE of claim 11, wherein to determine the one or more SL DRX configurations, the at least one processor is configured to cause the UE to: determine, for respective logical channels of a plurality of logical channels and at a radio resource control (RRC) layer of the UE, at least one SL DRX configuration from the plurality of SL DRX configurations based at least in part on a first additional mapping relationship between the QoS related parameter and a sidelink radio bearer (SLRB) and a second additional mapping relationship between the SLRB and the respective logical channels. ### Claim 14 (depends on 13) The UE of claim 13, wherein the at least one processor is further configured to cause the UE to: determine, for the respective logical channels and at the RRC layer, one SL DRX configuration from the at least one SL DRX configuration based at least in part on a pre-defined rule. ### Claim 15 (depends on 11) The UE of claim 11, wherein to transmit the SL data, the at least one processor is configured to cause the UE to: select one or more logical channels during a logical channel prioritization (LCP) procedure, wherein respective SL DRX configurations associated with the one or more logical channels are in at least one active time of the respective active times. ### Claim 16 (depends on 11) The UE of claim 11, wherein the one or more SL DRX configurations are determined for respective L2 destination IDs of the at least one L2 destination ID at a radio resource control (RRC) layer of the UE. ### Claim 17 (depends on 16) The UE of claim 16, wherein the one or more SL DRX configurations are based at least in part on a pre-defined rule. ### Claim 18 (depends on 11) The UE of claim 11, wherein the plurality of SL DRX configurations are configured based at least in part on one or more of a sidelink radio bearer (SLRB), a radio link control (RLC) bearer, or a logical channel (LCH), and wherein to determine the one or more SL DRX configurations, the at least one processor is configured to cause the UE to: determine, at the MAC layer, the one or more SL DRX configurations to be the plurality of SL DRX configurations. ### Claim 19 (depends on 18) The UE of claim 18, wherein to determine the one or more SL DRX configurations, the at least one processor is configured to cause the UE to: determine, for respective L2 destination IDs of the at least one L2 destination ID, one SL DRX configuration associated with the respective L2 destination IDs based at least in part on a pre-defined rule, wherein the plurality of SL DRX configurations comprise the one SL DRX configuration; and select an L2 destination ID of the at least one L2 destination ID during a logical channel prioritization (LCP) procedure, wherein an SL DRX configuration associated with the L2 destination ID is in at least one active time of the respective active times. ### Claim 20 A method performed by a user equipment (UE), the method comprising: obtaining a plurality of sidelink (SL) discontinuous reception (DRX) configurations for SL communication, wherein the plurality of SL DRX configurations are configured based at least in part on a quality of service (QoS) related parameter; obtaining, at a medium access control (MAC) layer of the UE from a higher layer of the UE, a mapping relationship between the QoS related parameter and at least one layer 2 (L2) destination identity (ID) associated with the MAC layer of the UE; determining, at the MAC layer of the UE and based at least in part on the mapping relationship, one or more SL DRX configurations of the plurality of SL DRX configurations for the at least one L2 destination ID associated with the MAC layer of the UE; and receiving SL data based at least in part on respective active times associated with the one or more SL DRX configurations.