Method and device for transmitting or receiving information relating to SL DRX active time in NR V2X

1 . A method comprising:

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

starting, by the first device, resource selection in a first slot;

determining, by the first device, a selection window, based on the first slot;

transmitting, by the first device to the second device, a first sidelink control information (SCI) including information related to resources; and

transmitting, by the first device, information for extending the active time of the second device to the second device through a first physical sidelink control channel (PSCCH) or a first physical sidelink shared channel (PSSCH) related to the first PSCCH, based on a gap between packet delay budget (PDB) and a next resource indicated by the first SCI being less than or equal to a first level.

2 . The method of claim 1 , wherein the information for extending the active time of the second device is transmitted through a medium access control (MAC) control element (CE) or radio resource control (RRC) signaling or SCI.

3 . The method of claim 1 , further comprising

transmitting, by the first device, second SCI for scheduling a second PSSCH and third SCI to the second device through a second PSCCH, based on a first resource,

wherein the second SCI includes information related to a second resource and information for allowing the second device to perform an SL DRX operation based on resource information between a time domain of the first resource and a time domain of the second resource.

4 . The method of claim 1 , wherein the information for extending the active time of the second device is not transmitted through the first PSCCH or the first PSSCH related to the first PSCCH, based on the gap between the PDB and the next resource indicated by the first SCI being greater than the first level.

5 . The method of claim 1 , wherein the information for extending the active time of the second device includes information for waking up the second device after a time point at which the active time ends, and includes information for disabling an SL DRX operation based on resource information included in second SCI to be transmitted to the second device.

6 . The method of claim 1 , wherein information for extending the active time of the second device is transmitted to the second device through the first PSCCH or the first PSSCH related to the first PSCCH, based on that a time point at which a time domain of the selection window ends is prior to a first time point.

7 . The method of claim 6 ,

wherein the first slot is a slot which exists within an inactive time of the second device, and

wherein resource reselection based on pre-emption or re-evaluation is started in the first slot, and

wherein the first time point is the same time point as a time point at which the active time of the second device ends, or is a time point prior to the time point at which the active time of the second device ends.

8 . The method of claim 7 , further comprising

transmitting, by the first device, second SCI for scheduling of a second PSCCH or third SCI to the second device through a second PSCCH, based on a first resource, the second SCI including information related to a second resource,

wherein the second SCI includes information for allowing the second device to perform an SL DRX operation based on resource information between a time domain of the first resource and a time domain of the second resource.

9 . The method of claim 6 , wherein the information for extending the active time of the second device further includes information on an awake time of the second device after wake-up of the second device.

10 . The method of claim 9 , wherein the information on the awake time of the second device further includes information for enabling an SL DRX operation based on resource information included in the second SCI to be transmitted to the second device, after the awake time of the second device expires.

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:

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

starting resource selection in a first slot;

determining a selection window, based on the first slot;

transmitting, to the second device, a first sidelink control information (SCI) including information related to resources; and

transmitting information for extending the active time of a second UE to the second UE through a first physical sidelink control channel (PSCCH) or a first physical sidelink shared channel (PSSCH) related to the first PSCCH, based on that a gap between packet delay budget (PDB) and a next resource indicated by the first SCI being less than or equal to a first level.

12 . The first device of claim 11 , wherein the information for extending the active time of the second device is transmitted through a medium access control (MAC) control element (CE) or radio resource control (RRC) signaling or SCI.

13 . The first device of claim 11 , wherein the operations further comprise:

transmitting second SCI for scheduling a second PSSCH and third SCI to the second device through a second PSCCH, based on a first resource,

wherein the second SCI includes information related to a second resource and information for allowing the second device to perform an SL DRX operation based on resource information between a time domain of the first resource and a time domain of the second resource.

14 . A processing 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 a first device to perform operations comprising:

obtaining a sidelink (SL) discontinuous reception (DRX) configuration including information related to an active time of a second device;

starting resource selection in a first slot;

determining a selection window, based on the first slot;

transmitting, to the second device, a first sidelink control information (SCI) including information related to resources; and

transmitting information for extending the active time of a second UE to the second UE through a first physical sidelink control channel (PSCCH) or a first physical sidelink shared channel (PSSCH) related to the first PSCCH, based on a gap between packet delay budget (PDB) and a next resource indicated by the first SCI being less than or equal to a first level.