Method for transmitting sidelink harq feedback in wireless communication system

A method of transmitting a sidelink hybrid automatic repeat request (HARQ) feedback by a user equipment (UE) in a wireless communication system, the method comprising:

• generating and configuring an HARQ codebook based on a configuration related to a Uu link;
• receiving a physical sidelink feedback channel (PSFCH) from another UE;
• and
• transmitting a sidelink HARQ feedback related to the PSFCH based on the configured HARQ codebook to a base station (BS),
• wherein a type of an HARQ codebook for the sidelink HARQ feedback is configured to be the same as a type of an HARQ codebook for a Uu link HARQ feedback.

A user equipment (UE) for transmitting a sidelink hybrid automatic repeat request (HARQ) feedback in a wireless communication system, the UE comprising:

• a memory;
• and
• a processor coupled to the memory,
• wherein the processor is configured to generate and configure an HARQ codebook based on a configuration related to a Uu link, receive a physical sidelink feedback channel (PSFCH) from another UE, and transmit a sidelink HARQ feedback related to the PSFCH based on the configured HARQ codebook to a base station (BS), and
• wherein a type of an HARQ codebook for the sidelink HARQ feedback is configured to be the same as a type of an HARQ codebook for a Uu link HARQ feedback.