Method and apparatus for determining candidate resource for partial sensing in NR V2X
Provided is an operation method of a first device ( 100 ) in a wireless communication system. The method may comprise the steps of: triggering resource selection for sidelink (SL) transmission; determining a selection window for the resource selection; and selecting, as at least one first candidate slot, at least one slot related to at least one first sensing slot.
1. A method for performing, by a first device, wireless communication, the method comprising:
performing first sensing for at least one first sensing slot;
triggering resource selection for a sidelink (SL) transmission;
determining a selection window for the resource selection; and
determining at least one slot within the selection window as at least one first candidate slot, based on a result of the first sensing.
2. The method of claim 1 , further comprising:
determining at least one second sensing slot, based on the at least one first candidate slot.
3. The method of claim 1 , wherein the selection window is determined in a resource pool in which a periodic transmission is allowed.
4. The method of claim 1 , wherein the at least one slot is determined as the at least one first candidate slot, based on the first sensing being period-based partial sensing (PBPS).
5. The method of claim 1 , wherein the SL transmission is an aperiodic transmission.
6. The method of claim 1 , further comprising:
determining at least one second sensing slot, based on the at least one first candidate slot,
wherein the at least one second sensing slot is included within a contiguous partial sensing (CPS) window.
7. The method of claim 6 , wherein the CPS window ends in a slot previous to the at least one first candidate slot by time determined based on processing time of the first device.
8. The method of claim 6 , wherein the CPS window starts at a slot previous to the at least one first candidate slot by a length of CPS window.
9. The method of claim 1 , further comprising:
performing partial sensing for at least one second sensing slot related to the at least one first candidate slot.
10. The method of claim 9 , further comprising:
determining at least one resource selection candidate resource within the resource selection window, based on a result of the partial sensing; and
selecting at least one transmission resource for the SL transmission, based on the at least one resource selection candidate resource.
11. The method of claim 10 , further comprising:
transmitting, to a second device, sidelink control information (SCI) for scheduling of a physical sidelink shared channel (PSSCH) through a physical sidelink control channel (PSCCH), based on the at least one transmission resource; and
transmitting, to the second device, a medium access control (MAC) protocol data unit (PDU) through the PSSCH, based on the at least one transmission resource.
12. The method of claim 1 , wherein the at least one first candidate slot is selected based on a threshold number related to the at least one first candidate slot.
13. The method of claim 12 , further comprising:
including at least one slot, within the selection window, other than a slot related to the at least one first sensing slot into the at least one first candidate slot, based on a number of the at least one first candidate slot being less than the threshold number related to the at least one first candidate slot.
14. A first device for performing wireless communication, the first device comprising:
one or more memories storing instructions;
one or more transceivers; and
one or more processors connected to the one or more memories and the one or more transceivers, wherein the one or more processors execute the instructions to:
perform first sensing for at least one first sensing slot
trigger resource selection for a sidelink (SL) transmission;
determine a selection window for the resource selection; and
determine at least one slot within the selection window as at least one first candidate slot, based on a result of the first sensing.
15. A device adapted to control a first user equipment (UE), the device comprising:
one or more processors; and
one or more memories operably connectable to the one or more processors and storing instructions, wherein the one or more processors execute the instructions to:
perform first sensing for at least one first sensing slot
trigger resource selection for a sidelink (SL) transmission;
determine a selection window for the resource selection; and
determine at least one slot within the selection window as at least one first candidate slot, based on a result of the first sensing.