Resource selection method and apparatus for sidelink transmission

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

• a transceiver;
• and
• at least one processor coupled with the transceiver and configured to:
• identify information for a resource pool,
• identify a physical sidelink feedback channel (PSFCH) period within the resource pool, and
• select a resource for transmission based on the PSFCH period, a time offset between a physical sidelink channel and a PSFCH, a time for a PSFCH reception and decoding, and a time for sidelink retransmission preparation, in case of resource allocation mode 2,
• wherein the resource for transmission is selected within a time interval [n+T1, n+T2], where n is a slot in which selecting the resource for transmission is triggered, T1 is associated with UE implementation, and T2 is associated with a packet delay budget.

A method performed by a base station, the method comprising:

• transmitting information for a resource pool,
• wherein a physical sidelink feedback channel (PSFCH) period is identified within the resource by at a user equipment (UE),
• wherein a resource for transmission is selected at the UE, based on the PSFCH period, a time offset between a physical sidelink channel and a PSFCH, a time for a PSFCH reception and decoding, and a time for sidelink retransmission preparation, in case of resource allocation mode 2, and
• wherein the resource for transmission is selected within a time interval [n+T1, n+T2], where n is a slot in which selecting the resource for transmission is triggered, T1 is associated with UE implementation, and T2 is associated with a packet delay budget.

A base station in a wireless communication system, the base station comprising:

• a transceiver;
• and
• at least one processor coupled with the transceiver and configured to:
• transmit information for a resource pool,
• wherein a physical sidelink feedback channel (PSFCH) period is identified within the resource pool at a user equipment (UE),
• wherein a resource for transmission is selected at the UE, based on the PSFCH period, a time offset between a physical sidelink channel and a PSFCH, a time requiredfor a PSFCH reception and decoding, and a time for sidelink retransmission preparation, in case of resource allocation mode 2, and
• wherein the resource for transmission is selected within a time interval [n+T1, n+T2], where n is a slot in which selecting the resource for transmission is triggered, T1 is associated with UE implementation, and T2 is associated with a packet delay budget.