Resource selection method and apparatus for sidelink transmission

1. A method performed by a user equipment (UE), the method comprising:

identifying information for a resource pool;

identifying a physical sidelink feedback channel (PSFCH) period within the resource pool; and

selecting 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.

2. The method of claim 1 , wherein the resource for transmission is selected on the resource pool.

3. 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.

4. The UE of claim 3 , wherein the resource for transmission is selected on the resource pool.

5. 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.

6. The method of claim 5 , wherein the resource for transmission is selected on the resource pool.

7. 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.

8. The base station of claim 7 , wherein the resource for transmission is selected on the resource pool.