Granted Patent B2

US 12,621,849 · App. 18/269,397 · Granted May 5, 2026

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

Assignee: LG Electronics Inc.

H04W72/25H04L1/1812H04L1/1854H04W72/12H04W76/28H04L1/1861

Abstract

Claims (39)

1 . A method comprising:

obtaining, by a first device, configuration information related to a sidelink discontinuous reception (SL DRX) including information related to an SL DRX cycle and information related to an active time;

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

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

determining, by the first device, a first physical sidelink feedback channel (PSFCH) resource within a first PSFCH slot, based on an index of a slot and an index of a subchannel, related to the first PSSCH; and

receiving, by the first device, from the second device, a first hybrid automatic repeat request (HARQ) feedback for the first MAC PDU based on the first PSFCH resource,

wherein, based on an interval between a time point of transmitting the first MAC PDU and a time point of receiving the first HARQ feedback being smaller than a threshold, the first device remains in an active time during the interval, and

wherein the threshold is determined based on a priority related to the first MAC PDU.

2 . The method of claim 1 , wherein, based on the first PSFCH slot being included within an inactive time at the time point of transmitting the first MAC PDU, the first device is transitioned to maintaining the active time during the interval between the time point of transmitting the first MAC PDU and the time point of receiving the first HARQ feedback.

3 . The method of claim 1 , wherein a timer related to SL DRX is started, based on transmitting the first MAC PDU, and

wherein the first device operates as an active time until the timer related to SL DRX expires.

4 . The method of claim 1 , further comprising:

transmitting, a third device, third SCI for scheduling a second PSSCH through a second PSCCH;

transmitting, to the third device, fourth SCI and a second MAC PDU through the second PSSCH,

wherein the first device is within an inactive time at a time point of receiving a second HARQ feedback for the second MAC PDU.

5 . The method of claim 4 , wherein the second MAC PDU is dropped, based on the second MAC PDU being a MAC PDU in which a HARQ feedback is enabled.

6 . The method of claim 4 , wherein the second MAC PDU is changed to a MAC PDU in which a HARQ feedback is disabled, based on the second MAC PDU being a MAC PDU in which a HARQ feedback is enabled.

7 . The method of claim 1 , wherein the first device receiving a HARQ feedback within an inactive time is allowed, based on at least one of a cast type, a service type, or a quality of service (QoS) requirement.

8 . 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:

obtaining configuration information related to a sidelink discontinuous reception (SL DRX) including information related to an SL DRX cycle and information related to an active time;

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

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

determining a first physical sidelink feedback channel (PSFCH) resource within a first PSFCH slot, based on an index of a slot and an index of a subchannel, related to the first PSSCH; and

receiving, from the second device, a first hybrid automatic repeat request (HARQ) feedback for the first MAC PDU based on the first PSFCH resource,

wherein, based on an interval between a time point of transmitting the first MAC PDU and a time point of receiving the first HARQ feedback being smaller than a threshold, the first device remains in an active time during the interval, and

wherein the threshold is determined based on a priority related to the first MAC PDU.

9 . 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 the at least one processor to control a first device to perform operations comprising:

obtaining configuration information related to a sidelink discontinuous reception (SL DRX) including information related to an SL DRX cycle and information related to an active time;

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

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

determining a first physical sidelink feedback channel (PSFCH) resource within a first PSFCH slot, based on an index of a slot and an index of a subchannel, related to the first PSSCH; and

receiving, from the second device, a first hybrid automatic repeat request (HARQ) feedback for the first MAC PDU based on the first PSFCH resource,

wherein, based on an interval between a time point of transmitting the first MAC PDU and a time point of receiving the first HARQ feedback being smaller than a threshold, the first device remains in an active time during the interval, and

wherein the threshold is determined based on a priority related to the first MAC PDU.

Assignments (1)

Continuity (3)

References Cited (20)