Method and apparatus for transmitting and receiving information related to resource collision in NR V2X
Provided are a method by which a first apparatus performs wireless communication, and an apparatus supporting same. The method may comprise the steps of: receiving, via a first physical sidelink control channel (PSCCH), first sidelink control information (SCI) including information related to a plurality of sidelink (SL) resources which have been reserved by a second apparatus; receiving, via a second PSCCH, second SCI including information related to a plurality of SL resources which have been reserved by a third apparatus, wherein a first SL resource from among the plurality of SL resources which have been reserved by the second apparatus overlaps a second SL resource from among the plurality of SL resources which have been reserved by the third apparatus; determining a physical sidelink feedback channel (PSFCH) resource related to the first SL resource and the second SL resource; and transmitting, to the second apparatus or the third apparatus, information related to the overlap, on the basis of the PSFCH resource.
1. A method for performing wireless communication by a first device, the method comprising:
receiving, through a first physical sidelink control channel (PSCCH), first sidelink control information (SCI) including a first priority value and information related to a first resource reserved by a second device;
receiving, through a second PSCCH, second SCI including a second priority value and information related to a second resource reserved by a third device;
determining that the first resource and the second resource overlap;
determining a physical sidelink feedback channel (PSFCH) resource for PSFCH transmission with conflict information corresponding to the first resource; and
performing the PSFCH transmission with the conflict information to the second device.
2. The method of claim 1 , wherein a priority value for the PSFCH transmission with the conflict information is equal to a smallest priority value determined by the first SCI and the second SCI.
3. The method of claim 2 , wherein the priority value for the PSFCH transmission with the conflict information is equal to the smallest priority value among the first priority value determined by the first SCI and the second priority value determined by the second SCI.
4. The method of claim 1 , wherein the first SL resource belongs to a slot after a slot in which the first SCI is received, and the second resource belongs to a slot after a slot in which the second SCI is received.
5. The method of claim 1 , wherein, based on that the first priority value is greater than the second priority value, the PSFCH transmission with the conflict information is performed to the second device.
6. The method of claim 1 , wherein a priority value for PSFCH reception with the conflict information is equal to the first priority value determined by the first SCI.
7. The method of claim 1 , wherein, based on that the first priority value is equal to the second priority value, the PSFCH transmission with the conflict information is performed to the second device or the third device.
8. The method of claim 1 , wherein a set of PSFCH resources for the conflict information and a set of PSFCH resources for sidelink (SL) hybrid automatic repeat request (HARQ)-ACK information are configured, respectively.
9. The method of claim 1 , wherein a resource for transmission or reception of the first device overlaps with the first resource or the second resource.
10. The method of claim 1 , wherein the conflict information represents a conflict between transmissions by the second device and the third device on the first resource and the second resource.
11. The method of claim 1 , wherein the conflict information represents that the first device cannot perform SL reception on the first resource or the second resource.
12. The method of claim 1 , wherein a domain of the PSFCH resource includes a time domain, a frequency domain and a code domain.
13. The method of claim 1 , wherein the first resource reserved by the second device is a resource for the second device to perform SL transmission to the first device or the third device, and
wherein the second resource reserved by the third device is a resource for the third device to perform SL transmission to the first device or the second device.
14. A first device adapted to perform wireless communication, the 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, perform operations comprising:
receiving, through a first physical sidelink control channel (PSCCH), first sidelink control information (SCI) including a first priority value and information related to a first resource reserved by a second device;
receiving, through a second PSCCH, second SCI including a second priority value and information related to a second resource reserved by a third device;
determining that the first resource and the second resource overlap;
determining a physical sidelink feedback channel (PSFCH) resource for PSFCH transmission with conflict information corresponding to the first resource; and
performing the PSFCH transmission with the conflict information to the second device.
15. The first device of claim 14 , wherein a priority value for the PSFCH transmission with the conflict information is equal to a smallest priority value determined by the first SCI and the second SCI.
16. The first device of claim 15 , wherein the priority value for the PSFCH transmission with the conflict information is equal to the smallest priority value among the first priority value determined by the first SCI and the second priority value determined by the second SCI.
17. The first device of claim 14 , wherein a priority value for PSFCH reception with the conflict information is equal to the first priority value determined by the first SCI.
18. A processing device adapted to control a first device, the 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, perform operations comprising:
receiving, through a first physical sidelink control channel (PSCCH), first sidelink control information (SCI) including a first priority value and information related to a first resource reserved by a second device;
receiving, through a second PSCCH, second SCI including a second priority value and information related to a second resource reserved by a third device;
determining that the first resource and the second resource overlap;
determining a physical sidelink feedback channel (PSFCH) resource for PSFCH transmission with conflict information corresponding to the first resource; and
performing the PSFCH transmission with the conflict information to the second device.
19. The processing device of claim 18 , wherein a priority value for the PSFCH transmission with the conflict information is equal to a smallest priority value determined by the first SCI and the second SCI.
20. The processing device of claim 19 , wherein the priority value for the PSFCH transmission with the conflict information is equal to the smallest priority value among the first priority value determined by the first SCI and the second priority value determined by the second SCI.