Operation method and device related to sidelink drx and initial transmission in wireless communication system

An operation method of a reception (RX) user equipment (UE) related to sidelink discontinuous reception (DRX) in a wireless communication system, the operation method comprising:

• establishing a PC5 connection with a transmission (TX) UE by the RX UE;
• and
• receiving a sidelink signal transmitted through a resource based on resource allocation information from the TX UE by the RX UE,
• wherein, based on that a resource related to initial transmission of the TX UE does not overlap an active time of the RX UE, the RX UE receives the initial transmission in a resource related to retransmission.

A transmission (TX) user equipment (UE) in a wireless communication system, the TX UE comprising:

• at least one processor;
• and
• at least one computer memory operatively connected to the at least one processor and configured to store instructions that when executed causes the at least one processor to perform operations including:
• establishing a PC5 connection with a reception (RX) UE by the TX UE;
• receiving a physical downlink control channel (PDCCH) including resource allocation information from a base station (BS) by the TX UE;
• and
• transmitting a sidelink signal through a resource based on the resource allocation information to the RX UE by the TX UE,
• wherein, based on that a resource related to initial transmission does not overlap an active time of the RX UE, the TX UE performs the initial transmission using a resource related to retransmission.

A processor for performing operations for a transmission (TX) user equipment (UE) in a wireless communication system, the operations including:

• establishing a PC5 connection with a reception (RX) UE by the TX UE;
• receiving a physical downlink control channel (PDCCH) including resource allocation information from a base station (BS) by the TX UE;
• and
• transmitting a sidelink signal through a resource based on the resource allocation information to the RX UE by the TX UE,
• wherein, based on that a resource related to initial transmission does not overlap an active time of the RX UE, the TX UE performs the initial transmission using a resource related to retransmission.

A non-volatile computer-readable storage medium for storing at least one computer program including an instruction for causing at least one processor to perform operations for a transmission (TX) user equipment (UE) when being executed by the at least one processor, the operations comprising:

• establishing a PC5 connection with a reception (RX) UE by the TX UE;
• receiving a physical downlink control channel (PDCCH) including resource allocation information from a base station (BS) by the TX UE;
• and
• transmitting a sidelink signal through a resource based on the resource allocation information to the RX UE by the TX UE,
• wherein, based on that a resource related to initial transmission does not overlap an active time of the RX UE, the TX UE performs the initial transmission using a resource related to retransmission.