Method and device for determining priority of UL transmission in NR V2X

A first device configured to perform 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:
• transmit a plurality of physical sidelink control channels (PSCCHs) and a plurality of physical sidelink shared channels (PSSCHs), each being related to a corresponding one of the PSCCHs;
• determine at least one physical sidelink feedback channel (PSFCH) resource related to the plurality of PSSCHs;
• obtain sidelink (SL) hybrid automatic repeat request (HARQ) feedback information related to each of the plurality of PSSCHs;
• and
• determine a priority value of a physical uplink control channel (PUCCH), based on SL HARQ feedback information, wherein the priority value of the PUCCH is determined to be a smallest priority value among a plurality of priority values corresponding to the plurality of PSSCHs, and whether the PUCCH is or is not transmitted is based on the determined priority value of the PUCCH.

An apparatus configured to control a first user equipment (UE) performing wireless communication, the apparatus comprising:

• one or more processors;
• and
• one or more memories operably connected to the one or more processors and storing instructions, wherein the one or more processors execute the instructions to:
• transmit a plurality of physical sidelink control channels (PSCCHs) and a plurality of physical sidelink shared channels (PSSCHs), each being related to a corresponding one of the PSCCHs;
• determine at least one physical sidelink feedback channel (PSFCH) resource related to the plurality of PSSCHs;
• obtain sidelink (SL) hybrid automatic repeat request (HARQ) feedback information related to each of the plurality of PSSCHs;
• and
• determine a priority value of a physical uplink control channel (PUCCH), based on SL HARQ feedback information, wherein the priority value of the PUCCH is determined to be a smallest priority value among a plurality of priority values corresponding to the plurality of PSSCHs, and whether the PUCCH is or is not transmitted is based on the determined priority value of the PUCCH.