Assisted sensing for sidelink resource selection

1 . A user equipment (UE), comprising:

a transceiver configured to receive a physical sidelink (SL) control channel (PSCCH) or a physical SL shared channel (PSSCH) on a SL interface; and

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

perform a first sensing of the SL interface, and

determine first information, based on the first sensing, for selection of a first SL resource at a second UE,

wherein the transceiver is further configured to transmit the first information to the second UE, and

wherein the first information includes at least one of:

available resources for the first SL resource selection at the second UE, and

unavailable resources for the first SL resource selection at the second UE.

2 . The UE of claim 1 , wherein:

the transceiver is further configured to receive a configuration for a set of SL resources, and

the first SL resource is from the set of SL resources.

3 . The UE of claim 1 , wherein:

the first SL resource is activated for transmission of a first SL channel based on one of:

after pre-configuration or configuration by higher layers,

by a medium access control (MAC) control element (CE), and

by physical layer control signaling; and

the first SL resource is activated for one of:

a predetermined number of transmission occasions,

a configured time period, and

remains activated until deactivated.

4 . The UE of claim 1 , wherein:

the transceiver is further configured to receive an indication to transmit a first SL channel with the first information; and

the processor is further configured to, in response to the indication, one of:

perform the first sensing of the SL interface and provide the first information to the transceiver, and

provide the first information to the transceiver.

5 . The UE of claim 1 , wherein the first information includes at least one of:

available resources for the first SL resource selection,

unavailable resources for the first SL resource selection,

undetermined resources for the first SL resource selection, and

a SL reference signal received power (RSRP) threshold for determination of resources available for the first SL resource selection.

6 . The UE of claim 1 , wherein the transceiver is further configured to multiplex in a first SL channel, at least one of:

a location for the UE,

an indication of a second SL resource for transmission of a second SL channel with second information for a second SL resource selection, and

an indication of SL resources used by a third UE to transmit a third SL channel with third information for third SL resource selection.

7 . The UE of claim 1 , wherein the processor is further configured to:

select the first SL resource, and

determine the first information based on one of:

a slot where the processor selects the first SL resource for transmission of a first SL channel, and

a slot where the transceiver transmits the first SL channel.

8 . The UE of claim 7 , wherein the processor is further configured to:

re-select the first SL resource based on a second sensing for at least one of:

a re-evaluation check for the first SL resource, and

a preemption check for the first SL resource; and

re-determine the first information for the first SL resource selection based on a third sensing.

9 . A user equipment (UE), comprising:

a transceiver configured to receive first information for selection of a first sidelink (SL) resource from a first UE, wherein the first information includes at least one of:

available resources for the first SL resource selection at the UE, and

unavailable resources for the first SL resource selection at the UE; and

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

determine an applicability of the first information, and

select a second SL resource based on the first information when the first information is determined to be applicable,

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

10 . The UE of claim 9 , wherein the processor is further configured to:

perform a sensing of an SL interface, and

select the second SL resource further based on the sensing.

11 . The UE of claim 9 , wherein:

the first SL resource is activated for reception based on one of:

after pre-configuration or configuration by higher layers,

by a medium access control (MAC) control element (CE), and

by physical layer control signaling; and

the first SL resource is activated for one of:

a predetermined number of reception occasions,

a configured time period, and

remains activated until deactivated.

12 . The UE of claim 9 , wherein the transceiver is further configured to:

transmit a third SL channel that includes a request for the first information, and

receive a first SL channel in response to the request.

13 . The UE of claim 9 , wherein the first information includes at least one of:

available resources for the selection of the second SL resource,

unavailable resources for the selection of the second SL resource,

undetermined resources for the selection of the second SL resource,

a SL reference signal received power (RSRP) threshold for determination of resources available for the selection of the second SL resource,

a location of the first UE providing the first information,

an indication of a third SL resource for transmission of a third SL channel with a second information for the selection of the second SL resource, and

an indication of a fourth SL resource used by a second UE to transmit a fourth SL channel with a third information for the selection of the second SL resource.

14 . The UE of claim 9 , wherein:

the transceiver is further configured to receive information for at least one of:

a distance threshold,

a SL reference signal received power (RSRP) threshold, and

a pathloss threshold; and

the processor is further configured to determine the applicability of the first information based on at least one of:

a distance between the UE and the first UE relative to the distance threshold,

a SL reference signal received power (RSRP) of a first SL channel relative to the SL RSRP threshold, and

a pathloss between the UE and the first UE relative to the pathloss threshold.

15 . The UE of claim 9 , wherein:

the transceiver is further configured to receive the second SL channel from a second UE, wherein the second SL channel includes second information; and

the processor is further configured to select the second SL resource from the first information or the second information based on at least one of:

a first distance between the UE and the first UE and a second distance between the UE and the second UE,

a first SL reference signal received power (RSRP) of a first SL channel and a second SL RSRP of the second SL channel, and

a first pathloss between the UE and the first UE and a second pathloss between the UE and the second UE.

16 . The UE of claim 9 , wherein:

a first SL channel is received;

the transceiver is further configured to receive the second SL channel from a second UE;

the first and second SL channels include at least first and second available resources for SL resource selection in first and second resource selection windows, respectively, that overlap at least partially in time; and

the processor is further configured to determine available resources for the second SL resource selection based on resources from at least one of:

the first available resources that do not overlap in time with the second resource selection window,

the second available resources that do not overlap in time with the first resource selection window,

an intersection of the first available resources and the second available resources that overlap in time, and

a union of the first available resources and the second available resources that overlap in time.

17 . The UE of claim 9 , wherein:

a first SL channel is received;

the transceiver is further configured to receive the second SL channel from a second UE, wherein the first and second SL channels include first and second information that at least provide, respectively:

first and second available SL resources, and

first and second undetermined SL resources; and

the processor is further configured to determine available resources for the second SL resource selection based on one of:

a SL resource that is indicated in both the first and second available SL resources, and

a SL resource that is indicated in the first available SL resources and in the second undetermined SL resources or indicated in the second available SL resources and in the first undetermined SL resources.

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

receiving first information for selection of a first sidelink (SL) resource from a first UE, wherein the first information includes at least one of:

available resources for the first SL resource selection at the UE, and

unavailable resources for the first SL resource selection at the UE;

determining an applicability of the first information;

selecting a second SL resource based on the first information when the first information is determined to be applicable; and

transmitting a second SL channel on the second SL resource.

19 . The method of claim 18 , further comprising:

performing a sensing of an SL interface; and

selecting the second SL resource further based on the sensing.

20 . The method of claim 18 , further comprising:

transmitting a third SL channel that includes a request for the first information, and

receiving a first SL channel in response to the request.