METHOD AND APPARATUS FOR NR V2X RESOURCE SELECTION

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

a transceiver configured to receive, from a second UE via a sidelink, signals including information to select resources for at least one of aperiodic traffic or periodic traffic; and

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

decode sidelink control information (SCI) from the information included in the signals,

perform, over a sensing window, a signal measurement of the received signals,

identify a resource selection window based on a latency requirement, and

reserve the resources for the at least one of aperiodic traffic or periodic traffic in a frequency domain and a time domain based on the decoded SCI and a result of the signal measurement, the resources being identified within a resource selection window,

wherein the transceiver is further configured to transmit, to the second UE via the sidelink, the at least one of aperiodic traffic or periodic traffic using the reserved resources.

2 . The first UE of claim 1 , wherein the latency requirement is configured by a network entity using a higher layer signaling or pre-determined by the first UE.

3 . The first UE of claim 1 , wherein the resources for the periodic traffic are determined by a resource reservation interval, and wherein the resources for the aperiodic traffic are determined based on a channel occupancy time.

4 . The first UE of claim 1 , wherein the transceiver is further configured to transmit the SCI including a preemption indication, wherein the preemption indication indicates the resources to be selected, by the first UE, for the at least one of aperiodic traffic or periodic traffic.

5 . The first UE of claim 4 , wherein the at least one of aperiodic traffic or periodic traffic transmitted by the first UE has a higher priority to use the resources than traffic of the second UE.

6 . The first UE of claim 1 , wherein:

the resources for the aperiodic traffic are reserved by a first resource allocation operation,

the resources for the periodic traffic are reserved by a second resource allocation operation, and

the first resource allocation operation and the second resource allocation operation are performed in a same resource pool for the resources for the at least one of aperiodic traffic or periodic traffic.

7 . The first UE of claim 1 , wherein:

the resources for the aperiodic traffic are reserved by a first resource allocation operation,

the resources for the periodic traffic are reserved by a second resource allocation operation, and

the first resource allocation operation and the second resource allocation operation are performed in different resource pools for the resources for the at least one of aperiodic traffic or periodic traffic.

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

a transceiver configured to:

transmit, to a first UE via a sidelink, signals including information to select resources for at least one of aperiodic traffic or periodic traffic,

receive, from the first UE, the at least one of aperiodic traffic or periodic traffic using resources,

wherein:

sidelink control information (SCI) from the information included in the signals is decoded,

a signal measurement of the transmitted signals, over a sensing window, is performed,

a resource selection window is identified based on a latency requirement, and

the resources are reserved for the at least one of aperiodic traffic or periodic traffic in a frequency domain and a time domain based on the decoded SCI and a result of the signal measurement, the resources being identified within a resource selection window.

9 . The second UE of claim 8 , wherein the latency requirement is configured by a network entity using a higher layer signaling or pre-determined by the first UE.

10 . The second UE of claim 8 , wherein the resources for the periodic traffic are determined by a resource reservation interval, and wherein the resources for the aperiodic traffic are determined based on a channel occupancy time.

11 . The second UE of claim 8 , wherein the transceiver is further configured to receive the SCI including a preemption indication, wherein the preemption indication indicates the resources to be selected, by the first UE, for the at least one of aperiodic traffic or periodic traffic.

12 . The second UE of claim 11 , wherein the at least one of aperiodic traffic or periodic traffic transmitted by the first UE has a higher priority to use the resources than traffic of the second UE.

13 . The second UE of claim 8 , wherein:

the resources for the aperiodic traffic are reserved by a first resource allocation operation,

the resources for the periodic traffic are reserved by a second resource allocation operation, and

the first resource allocation operation and the second resource allocation operation are performed in a same resource pool for the resources for the at least one of aperiodic traffic or periodic traffic.

14 . The second UE of claim 8 , wherein:

the resources for the aperiodic traffic are reserved by a first resource allocation operation,

the resources for the periodic traffic are reserved by a second resource allocation operation, and

the first resource allocation operation and the second resource allocation operation are performed in different resource pools for the resources for the at least one of aperiodic traffic or periodic traffic.

15 . A method of a first user equipment (UE) in a wireless communication system, the method comprising:

receiving, from a second UE via a sidelink, signals including information to select resources for at least one of aperiodic traffic or periodic traffic;

decoding sidelink control information (SCI) from the information included in the signals;

performing, over a sensing window, a signal measurement of the received signals;

identifying a resource selection window based on a latency requirement;

reserving the resources for the at least one of aperiodic traffic or periodic traffic in a frequency domain and a time domain based on the decoded SCI and a result of the signal measurement, the resources being identified within a resource selection window; and

transmitting, to the second UE via the sidelink, the at least one of aperiodic traffic or periodic traffic using the reserved resources.

16 . The method of claim 15 , wherein the latency requirement is configured by a network entity using a higher layer signaling or pre-determined by the first UE.

17 . The method of claim 15 , wherein the resources for the periodic traffic are determined by a resource reservation interval, and wherein the resources for the aperiodic traffic are determined based on a channel occupancy time.

18 . The method of claim 15 , further comprising transmitting the SCI including a preemption indication, wherein the preemption indication indicates the resources to be selected, by the first UE, for the at least one of aperiodic traffic or periodic traffic, wherein the at least one of aperiodic traffic or periodic traffic transmitted by the first UE has a higher priority to use the resources than traffic of the second UE.

19 . The method of claim 15 , wherein:

the resources for the aperiodic traffic are reserved by a first resource allocation operation,

the resources for the periodic traffic are reserved by a second resource allocation operation, and

the first resource allocation operation and the second resource allocation operation are performed in a same resource pool for the resources for the at least one of aperiodic traffic or periodic traffic.

20 . The method of claim 15 , wherein:

the resources for the aperiodic traffic are reserved by a first resource allocation operation,

the resources for the periodic traffic are reserved by a second resource allocation operation, and

the first resource allocation operation and the second resource allocation operation are performed in different resource pools for the resources for the at least one of aperiodic traffic or periodic traffic.