Method and apparatus for configuration and signaling of SL resources for inter-UE co-ordination

1. A user equipment (UE), comprising:

a processor configured to identify configuration information to enable inter-UE co-ordination for a sidelink (SL) resource pool; and

a transceiver operably coupled to the processor, the transceiver configured to:

transmit, to a target UE, a signal to trigger transmission of inter-UE co-ordination information, wherein the inter-UE co-ordination information is based on sensing at the target UE, and

receive the inter-UE co-ordination information from the target UE,

wherein the inter-UE co-ordination information indicates a plurality of resources including at least one of preferred resources and non-preferred resources,

wherein the preferred resources are resources available for SL transmission and the non-preferred resources are resources not available for SL transmission,

wherein the processor is further configured to:

determine a set of candidate SL resources based on the inter-UE co-ordination information, and

randomly select a SL resource within the determined set, and

wherein the transceiver is further configured to transmit a SL channel on the SL resource.

2. The UE of claim 1 , wherein:

the signal to trigger the transmission of inter-UE co-ordination information is included in SL control information (SCI) and a medium access control—control element (MAC-CE), and

the signal to trigger the transmission of inter-UE co-ordination information indicates a priority of the SL channel transmission.

3. The UE of claim 1 , wherein the trigger for the transmission of the inter-UE co-ordination information indicates a priority.

4. The UE of claim 1 , wherein the inter-UE co-ordination information indicates one or more resources reserved by decoded SL control information (SCI) in a sensing window.

5. The UE of claim 1 , wherein:

the processor is further configured to perform sensing, and

the set of candidate SL resources is an intersection of the preferred resources and the sensing.

6. A target user equipment (UE), comprising:

a processor configured to identify configuration information to enable inter-UE co-ordination for a sidelink (SL) resource pool; and

a transceiver operably coupled to the processor, the transceiver configured to receive, from another UE, a signal to trigger transmission of inter-UE co-ordination information, wherein the inter-UE co-ordination information is based on sensing at the target UE,

wherein the processor is further configured to determine, based on the configuration information and the signal to trigger the transmission of inter-UE co-ordination information, the inter-UE co-ordination information,

wherein the inter-UE co-ordination information indicates a plurality of resources including at least one of preferred resources and non-preferred resources,

wherein the preferred resources are resources available for SL transmission and the non-preferred resources are resources not available for SL transmission, and

wherein the transceiver is further configured to:

transmit the inter-UE co-ordination information, and

receive a SL channel on a SL resource in a set of candidate SL resources that are based on the inter-UE co-ordination information.

7. The target UE of claim 6 , wherein:

the signal to trigger the transmission of inter-UE co-ordination information is included in SL control information (SCI) and a medium access control—control element (MAC-CE), and

the signal to trigger the transmission of inter-UE co-ordination information indicates a priority of the SL channel reception.

8. The target UE of claim 6 , wherein the trigger for the transmission of the inter-UE co-ordination information indicates a priority.

9. The target UE of claim 6 , wherein the inter-UE co-ordination information indicates one or more resources reserved by decoded SL control information (SCI) in a sensing window.

10. The target UE of claim 6 , wherein the set of candidate SL resources is an intersection of the preferred resources and sensing at the other UE.

11. A method of operating a user equipment (UE), the method comprising:

identifying configuration information to enable inter-UE co-ordination for a sidelink (SL) resource pool;

transmitting, to a target UE, a signal to trigger transmission of inter-UE co-ordination information, wherein the inter-UE co-ordination information is based on sensing at the target UE;

receiving the inter-UE co-ordination information from the target UE, wherein:

the inter-UE co-ordination information indicates a plurality of resources including at least one of preferred resources and non-preferred resources, and

the preferred resources are resources available for SL transmission and the non-preferred resources are resources not available for SL transmission;

determining a set of candidate SL resources based on the inter-UE co-ordination information;

randomly selecting a SL resource within the determined set; and

transmitting a SL channel on the SL resource.

12. The method of claim 11 , wherein:

the signal to trigger the transmission of inter-UE co-ordination information is included in SL control information (SCI) and a medium access control—control element (MAC-CE), and

the signal to trigger the transmission of inter-UE co-ordination information indicates a priority of the SL channel transmission.

13. The method of claim 11 , wherein the trigger for the transmission of the inter-UE co-ordination information indicates a priority.

14. The method of claim 11 , wherein the inter-UE co-ordination information indicates one or more resources reserved by decoded SL control information (SCI) in a sensing window.

15. The method of claim 11 , further comprising:

performing sensing,

wherein the set of candidate SL resources is an intersection of the preferred resources and the sensing.