Method and device for performing wake-up for SL DRX operation in NR V2X

1 . A method comprising:

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

transmitting, by the first device to the second device, second SCI or data through the PSSCH,

wherein the first SCI includes a wake-up indication signal (WIS) field,

wherein an active time related to sidelink (SL) discontinuous reception (DRX) is activated based on the WIS field,

wherein, in the active time related to the SL DRX, sensing is performed for an entire sensing duration,

wherein, in an inactive time related to the SL DRX, sensing is performed for a part of a sensing duration,

wherein the WIS field is 1 bit,

wherein a target of the SL DRX is informed to the second device through the WIS field,

wherein the second SCI includes at least one of a part of a source ID or a part of a destination ID,

wherein, based on the WIS field, decoding is performed for the part of the source ID or the part of the destination ID,

wherein, based on that a target of at least one of the part of the source ID or the part of the destination ID is the second device, the active time related to the SL DRX is extended for the second device, and

wherein, based on that a target of at least one of all of the source ID or all of the destination ID is a third device through MAC header decoding, the active time that was extended for the second device based on the part of the source ID or the part of the destination ID is changed to an inactive time.

2 . The method of claim 1 , wherein the active time is activated after a slot for the PSCCH.

3 . The method of claim 1 , wherein, based on that the second device is a target of the SL DRX based on either a part of a source ID or a part of a destination ID and a hybrid automatic repeat request (HARQ) process ID, the active time related to the SL DRX is extended.

4 . The method of claim 1 , wherein the WIS field includes at least one of a hash value for at least one of a source ID or a destination ID or most significant bits (MSBs) for at least one of the source ID or the destination ID.

5 . The method of claim 1 , wherein a signal for triggering a sensing operation for the entire sensing duration is received from the second device.

6 . The method of claim 1 , wherein the sensing for the part of the sensing duration is performed based on a sensing timer related to the SL DRX.

7 . The method of claim 1 , wherein the sensing duration is located in a time domain before a threshold from an on-duration related to the SL DRX.

8 . The method of claim 1 , wherein sensing for selecting resources related to SL transmission is performed based on received signal strength indicator (RSSI), and

wherein SL resources that can collide are excluded from resources related to the SL transmission based on a result of the sensing and periods related to all SL resources.

9 . 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 by the at least one processor, cause the first device to perform operations comprising:

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

transmitting, to the second device, second SCI or data through the PSSCH,

wherein the first SCI includes a wake-up indication signal (WIS) field,

wherein an active time related to sidelink (SL) discontinuous reception (DRX) is activated based on the WIS field,

wherein, in the active time related to the SL DRX, sensing is performed for an entire sensing duration,

wherein, in an inactive time related to the SL DRX, sensing is performed for a part of a sensing duration,

wherein the WIS field is 1 bit,

wherein a target of the SL DRX is informed to the second device through the WIS field,

wherein the second SCI includes at least one of a part of a source ID or a part of a destination ID,

wherein, based on the WIS field, decoding is performed for the part of the source ID or the part of the destination ID,

wherein, based on that a target of at least one of the part of the source ID or the part of the destination ID is the second device, the active time related to the SL DRX is extended for the second device, and

wherein, based on that a target of at least one of all of the source ID or all of the destination ID is a third device through MAC header decoding, the active time that was extended for the second device based on the part of the source ID or the part of the destination ID is changed to an inactive time.

10 . The first device of claim 9 , wherein the active time is activated after a slot for the PSCCH.

11 . 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 by the at least one processor, cause a first device to perform operations comprising:

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

transmitting, to the second device, second SCI or data through the PSSCH,

wherein the first SCI includes a wake-up indication signal (WIS) field,

wherein an active time related to sidelink (SL) discontinuous reception (DRX) is activated based on the WIS field,

wherein, in the active time related to the SL DRX, sensing is performed for an entire sensing duration,

wherein, in an inactive time related to the SL DRX, sensing is performed for a part of a sensing duration,

wherein the WIS field is 1 bit,

wherein a target of the SL DRX is informed to the second device through the WIS field,

wherein the second SCI includes at least one of a part of a source ID or a part of a destination ID,

wherein, based on the WIS field, decoding is performed for the part of the source ID or the part of the destination ID,

wherein, based on that a target of at least one of the part of the source ID or the part of the destination ID is the second device, the active time related to the SL DRX is extended for the second device, and

wherein, based on that a target of at least one of all of the source ID or all of the destination ID is a third device through MAC header decoding, the active time that was extended for the second device based on the part of the source ID or the part of the destination ID is changed to an inactive time.