Method and apparatus for determining transmit power of psfch in nr v2x

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:
• receive first sidelink control information (SCI) from a second device through a physical sidelink control channel (PSCCH);
• receive a reference signal and data from the second device through a physical sidelink shared channel (PSSCH) related to the PSCCH;
• determine a physical sidelink feedback channel (PSFCH) resource, based on a subchannel and a slot related to the PSSCH;
• measure reference signal received power (RSRP) based on the reference signal received through the PSSCH related to the PSFCH resource;
• determine first transmit power of a PSFCH transmitted on the PSFCH resource, based on the RSRP;
• and
• transmit the PSFCH to the second device based on the determined first transmit power of the PSFCH.

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:
• receive first sidelink control information (SCI) from a second UE through a physical sidelink control channel (PSCCH);
• receive a reference signal and data from the second UE through a physical sidelink shared channel (PSSCH) related to the PSCCH;
• determine a physical sidelink feedback channel (PSFCH) resource, based on a subchannel and a slot related to the PSSCH;
• measure reference signal received power (RSRP) based on the reference signal received through the PSSCH related to the PSFCH resource;
• determine first transmit power of a PSFCH transmitted on the PSFCH resource, based on the RSRP;
• and
• transmit the PSFCH to the second UE based on the determined first transmit power of the PSFCH.