Method and apparatus for determining transmit power of PSFCH in NR V2X

A first device comprising:

• one or more processors;
• one or more transceivers;
• and
• one or more memories connected to the one or more processors and storing instructions,
• wherein the instructions, based on being executed by the one or more processors, cause the first device to:
• receive first sidelink control information (SCI) from a second device through a physical sidelink control channel (PSCCH);
• receive data, through a physical sidelink shared channel (PSSCH) related to the PSCCH, and a reference signal associated with the PSSCH;
• 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 associated with the PSSCH;
• determine first transmit power of a PSFCH transmitted on the PSFCH resource, based on the RSRP and second maximum transmit power related to the PSFCH,
• wherein the second maximum transmit power is a value obtained by multiplying first maximum transmit power of the first device by a scaling value configured based on a resource pool related to the PSFCH;
• and
• transmit the PSFCH to the second device based on the determined first transmit power of the PSFCH.

A processing device adapted to control a first device, the processing device comprising:

• one or more processors;
• and
• one or more memories connected to the one or more processors and storing instructions,
• wherein the instructions, based on being executed by the one or more processors, cause the first device to:
• receive first sidelink control information (SCI) from a second UE through a physical sidelink control channel (PSCCH);
• receive data, through a physical sidelink shared channel (PSSCH) related to the PSCCH, and a reference signal associated with the PSSCH;
• 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 associated with the PSSCH;
• determine first transmit power of a PSFCH transmitted on the PSFCH resource, based on the RSRP and second maximum transmit power related to the PSFCH,
• wherein the second maximum transmit power is a value obtained by multiplying first maximum transmit power of the first device by a scaling value configured based on a resource pool related to the PSFCH;
• and
• transmit the PSFCH to the second UE based on the determined first transmit power of the PSFCH.