Method and apparatus for performing SL DRX operation in NR V2X

Inventors: Giwon Park (Seoul, KR); Seungmin Lee (Seoul, KR); Seoyoung Back (Seoul, KR); Jongwoo Hong (Seoul, KR)

Assignee: LG ELECTRONICS INC.

H04W72/25 H04L1/1851 H04W76/28

View Patent ↗

Loading inventors, assignments & file history…

Monitor This Case

Get email alerts when status or documents change.

Order Certified Copies

Most orders are placed with the USPTO same day — all within 24 business hours.

Order via The Patent Place →

Pre-filled with this patent's details

Quick Facts

Patent No.: US 12707478
App. No.: 18/290,428
Granted: Aug 11, 2026
Kind: B2

External Links

USPTO Patent Center↗ Full Patent PDF↗

Abstract

Provided are a method for performing wireless communication by a first device, and an apparatus for supporting same. The method may comprise the steps of: receiving information related to a configured grant (CG) from a base station through at least one of downlink control information (DCI) and a radio resource control (RRC) message; on the basis of a first sidelink (SL) resource in a period allocated by the CG, transmitting second sidelink control information (SCI) and first SCI for scheduling a physical sidelink shared channel (PSSCH) to a second device through a physical sidelink control channel (PSCCH); and on the basis of the first SL resource in the period, transmitting the second SCI and a medium access control (MAC) protocol data unit (PDU) to the second device through the PSSCH.

Claims (40)

1 . A method comprising:

receiving, by a first device from a base station, information regarding a maximum number of sidelink (SL) transmissions related to a configured grant (CG);

transmitting, by the first device to a second device, through a physical sidelink control channel (PSCCH), first sidelink control information (SCI) for scheduling of a physical sidelink shared channel (PSSCH) and second SCI; and

transmitting, by the first device to the second device, through the PSSCH, the second SCI and a medium access control (MAC) protocol data unit (PDU),

wherein the first SCI, the second SCI, and the MAC PDU are transmitted based on a first SL resource within a period of the CG, and

wherein, based on that a number of SL transmissions performed within the period is less than the maximum number of SL transmissions, information related to an active state is included in the first SCI or the second SCI.

2 . The method of claim 1 , wherein the information related to the active state is information requesting the second device to operate in the active state.

3 . The method of claim 1 , wherein retransmission of the MAC PDU is monitored by the second device within an active time based on the information related to the active state.

4 . The method of claim 1 , wherein, based on the information related to the active state, a SL discontinuous reception (DRX) hybrid automatic repeat request (HARQ) round trip time (RTT) timer is started by the second device, and a SL DRX retransmission timer is started by the second device after the SL DRX HARQ RTT timer expires.

5 . The method of claim 1 , wherein the number of SL transmissions includes a number of dropped SL transmissions and a number of performed SL transmissions.

6 . The method of claim 1 , wherein the number of SL transmissions includes a number of performed SL transmissions and does not include a number of dropped SL transmissions.

7 . The method of claim 1 , wherein, based on that HARQ feedback is disabled for the MAC PDU, the information related to the active state is included in the first SCI or the second SCI.

8 . The method of claim 1 , wherein, based on that the maximum number of SL transmissions is less than a number of SL resources within the period allocated by the CG, the information related to the active state is included in the first SCI or the second SCI.

9 . The method of claim 1 , wherein information related to a physical uplink control channel (PUCCH) resource is received from the base station.

10 . The method of claim 9 , further comprising:

transmitting, by the first device to the base station, negative acknowledgment (NACK) based on the PUCCH resource; and

receiving, by the first device from the base station, downlink control information (DCI) including information related to a second SL resource for retransmission of the MAC PDU,

wherein the second SL resource is allocated to be included in an active time in which the second device operates in the active state based on the information related to the active state.

11 . A first device, comprising:

at least one transceiver;

at least one processor; and

at least one memory connected to the at least one processor and storing instructions that, based on being executed, cause the first device to perform operations comprising:

receiving, from a base station, information regarding a maximum number of sidelink (SL) transmissions related to a configured grant (CG);

transmitting, to a second device, through a physical sidelink control channel (PSCCH), first sidelink control information (SCI) for scheduling of a physical sidelink shared channel (PSSCH) and second SCI; and

transmitting, to the second device, through the PSSCH, the second SCI and a medium access control (MAC) protocol data unit (PDU),

wherein the first SCI, the second SCI, and the MAC PDU are transmitted based on a first SL resource within a period of the CG, and

12 . The first device of claim 11 , wherein the information related to the active state is information requesting the second device to operate in the active state.

13 . The first device of claim 11 , wherein retransmission of the MAC PDU is monitored by the second device within an active time based on the information related to the active state.

14 . The first device of claim 11 , wherein, based on the information related to the active state, a SL discontinuous reception (DRX) hybrid automatic repeat request (HARQ) round trip time (RTT) timer is started by the second device, and a SL DRX retransmission timer is started by the second device after the SL DRX HARQ RTT timer expires.

15 . A processing device comprising:

at least one processor; and

at least one memory connected to the at least one processor and storing instructions that, based on being executed, cause a first device to perform operations comprising:

receiving, from a base station, information regarding a maximum number of sidelink (SL) transmissions related to a configured grant (CG)-information related to a configured grant (CG), through at least one of downlink control information (DCI) or a radio resource control (RRC) message;

transmitting, to the second device, through the PSSCH, the second SCI and a medium access control (MAC) protocol data unit (PDU),

wherein the first SCI, the second SCI, and the MAC PDU are transmitted based on a first SL resource within a period of the CG, and

16 . The processing device of claim 15 , wherein the information related to the active state is information requesting the second device to operate in the active state.

17 . The processing device of claim 15 , wherein retransmission of the MAC PDU is monitored by the second device within an active time based on the information related to the active state.