Resource selection method and apparatus for sidelink transmission
A method performed by a first user equipment includes identifying sidelink (SL) resource pool information, determining whether a hybrid automatic repeat request (HARQ) retransmission is configured based on the SL resource pool information, and selecting at least one resource for transmission of a physical sidelink shared channel (PSSCH) based on the determining that the HARQ retransmission is configured. The at least one resource is determined for ensuring a time gap, based on at least one of a period of resources configured for a physical sidelink feedback channel (PSFCH), an offset between a slot of a PSSCH transmission and a slot of a PSFCH reception, or a time required for reception and processing of the PSFCH plus a time required for SL retransmission preparation.
1. A method performed by a user equipment (UE), the method comprising:
identifying information for a resource pool;
identifying a resource allocation mode;
identifying physical sidelink feedback channel (PSFCH) information, wherein the PSFCH information includes information for a PSFCH period; and
performing a resource selection for transmission, by the UE, based on the information for the PSFCH period, a time required for PSFCH reception and decoding, and a time for retransmission preparation, in case that the resource allocation mode is resource allocation mode 2, and
wherein a time interval associated with the resource selection for transmission is defined as [n+T1, n+T2], where the TI is associated with a processing time for selection of a resource for transmission, and the T2 is associated with a packet delay budget.
2. The method of claim 1 , wherein the resource for transmission is selected further based on a time offset between a physical sidelink channel and the PSFCH.
3. The method of claim 1 , wherein the resource for transmission is selected on the resource pool.
4. The method of claim 1 , wherein the PSFCH information is associated with the resource pool.
5. A user equipment (UE) in a wireless communication system, the UE comprising:
a transceiver; and
at least one processor coupled to the transceiver and configured to:
identify information for a resource pool,
identify a resource allocation mode,
identify physical sidelink feedback channel (PSFCH) information, wherein the PSFCH information includes information for a PSFCH period, and
perform a resource selection for transmission, by the UE, based on the information for the PSFCH period, a time required for PSFCH reception and decoding, and a time for retransmission preparation, in case that the resource allocation mode is resource allocation mode 2, and
wherein a time interval associated with the resource selection for transmission is defined as [n+T1, n+T2], where the TI is associated with a processing time for selection of a resource for transmission, and the T2 is associated with a packet delay budget.
6. The UE of claim 5 , wherein the resource for transmission is selected further based on a time offset between a physical sidelink channel and the PSFCH.
7. The UE of claim 5 , wherein the resource for transmission is selected on the resource pool.
8. The UE of claim 5 , wherein the PSFCH information is associated with the resource pool.
9. A method performed by a base station, the method comprising:
transmitting information for a resource pool,
wherein physical sidelink feedback channel (PSFCH) information is identified by a user equipment (UE), the PSFCH information comprising information for a PSFCH period,
wherein a resource selection for transmission is performed by the UE, based on the information for the PSFCH period, a time required for PSFCH reception and decoding, and time for the retransmission preparation, in case of resource allocation mode 2, and
wherein a time interval associated with the resource selection for transmission is defined as [n+T1, n+T2], where the TI is associated with a processing time for selection of a resource for transmission, and the T2 is associated with a packet delay budget.
10. The method of claim 9 , wherein the resource for transmission is selected further based on a time offset between a physical sidelink channel and the PSFCH.
11. The method of claim 9 , wherein the resource for transmission is selected on the resource pool.
12. The method of claim 9 , wherein the PSFCH information is associated with the resource pool.
13. A base station in a wireless communication system, the base station comprising:
a transceiver; and
at least one processor coupled to the transceiver and configured to transmit information for a resource pool,
wherein physical sidelink feedback channel (PSFCH) information is identified by a user equipment (UE), the PSFCH information comprising information for a PSFCH period,
wherein a resource selection for transmission is performed by the UE, based on the information for the PSFCH period, a time required for PSFCH reception and decoding, and time for retransmission preparation, in case of resource allocation mode 2, and
wherein a time interval associated with the resource selection for transmission is defined as [n+T1, n+T2], where the TI is associated with a processing time for selection of a resource for transmission, and the T2 is associated with a packet delay budget.
14. The base station of claim 13 , wherein the resource for transmission is selected further based on a time offset between a physical sidelink channel and the PSFCH.
15. The base station of claim 13 , wherein the resource for transmission is selected on the resource pool.
16. The base station of claim 13 , wherein the PSFCH information is associated with the resource pool.