Method and device for performing SL communication on basis of assistance information in NR V2X

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:
• transmitting, to a second device through a physical sidelink control channel (PSCCH), first sidelink control information (SCI) including scheduling information for a physical sidelink shared channel (PSSCH), wherein the first SCI includes information related to frequency resource assignment, information related to time resource assignment, information related to a demodulation reference signal (DMRS) pattern, and information related to modulation and coding scheme (MCS);
• and
• transmitting, to the second device through the PSSCH, assistance information including a plurality of time resource indicator values (TRIVs), a plurality of frequency resource indicator values (FRIVs) and information related to reference time location,
• wherein the information related to the reference time location includes a first direct frame number (DFN) index and a first slot index, and
• wherein the assistance information is information for sidelink (SL) resource selection of the second device.

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:
• transmitting, to a second device through a physical sidelink control channel (PSCCH), first sidelink control information (SCI) including scheduling information for a physical sidelink shared channel (PSSCH), wherein the first SCI includes information related to frequency resource assignment, information related to time resource assignment, information related to a demodulation reference signal (DMRS) pattern, and information related to modulation and coding scheme (MCS);
• and
• transmitting, to the second device through the PSSCH, assistance information including a plurality of time resource indicator values (TRIVs), a plurality of frequency resource indicator values (FRIVs) and information related to reference time location,
• wherein the information related to the reference time location includes a first direct frame number (DFN) index and a first slot index, and
• wherein the assistance information is information for sidelink (SL) resource selection of the second device.