Receiving a sidelink positioning resource grant

1 . A method performed by an initiator User Equipment (“UE”), the method comprising:

triggering a sidelink positioning resource request by a higher-layer radio protocol;

requesting a set of sidelink resources from a radio access network (“RAN”), wherein requesting the set of sidelink resources from the RAN is based on triggered sidelink positioning associated with the initiator UE or a responder UE;

receiving a sidelink positioning resource grant for performing a sidelink positioning session with the responder UE, wherein the sidelink positioning resource grant is applicable to both the initiator UE and the responder UE, wherein the sidelink positioning resource grant is associated with source and destination physical layer sidelink positioning identifiers (“IDs”);

reserving a set of sidelink positioning resources, from the sidelink positioning resource grant, for performing the sidelink positioning session between the initiator UE and the responder UE; and

performing the sidelink positioning session using the reserved set of sidelink positioning resources.

2 . The method of claim 1 , wherein the sidelink positioning session comprises a ranging method applied in the sidelink.

3 . The method of claim 1 , wherein requesting the set of sidelink resources from the RAN comprises transmitting a ranging request, and wherein the sidelink positioning resource grant comprises a dynamic positioning grant issued to the initiator UE.

4 . The method of claim 1 , wherein requesting the set of sidelink resources from the RAN comprises transmitting a periodic ranging request, wherein the sidelink positioning resource grant comprises a configured positioning grant issued to the responder UE.

5 . The method of claim 4 , wherein the configured positioning grant is activated using RRC signaling.

6 . The method of claim 4 , wherein the configured positioning grant is activated using DCI signaling.

7 . The method of claim 1 , wherein receiving the sidelink positioning resource grant comprises receiving a configuration for a plurality of configured grants to the initiator UE, wherein a subset of the configured grants is used by the initiator UE and wherein a remainder of the configured grants is reserved for the responder UE.

8 . The method of claim 7 , wherein the plurality of configured grants are applicable to one or more configured combinations of unicast, groupcast or broadcast ranging methods.

9 . The method of claim 1 , wherein the source and destination physical layer IDs are derived corresponding to the initiator UE and responder UE, respectively.

10 . The method of claim 1 , wherein the source and destination physical layer IDs are implicitly derived based on one of:

layer-2 sidelink positioning IDs corresponding to the initiator UE and responder UE, respectively; or

a sidelink positioning transaction ID.

11 . The method of claim 1 , further comprising prioritizing the sidelink positioning resource request with a highest available priority, wherein a sidelink buffer status report is used to trigger a resource request to the RAN for SL positioning.

12 . The method of claim 1 , wherein a single or more combination of cyclic shifts is applied for a one-to-many ranging session according to a positioning reference signal (“PRS”) Type.

13 . The method of claim 1 , wherein performing the sidelink positioning session comprises establishing a standalone SL signaling radio bearer (“SRB”) and/or using a standalone SL positioning protocol for transmission and reception of sidelink positioning information, said standalone SL SRB being separate from the SL-SRB0, the SL-SL-SRB1, the SL-SRB2, and the SL-SRB3 signaling radio bearers described herein, said standalone SL positioning protocol being separate from LTE positioning protocol, LTE positioning protocol annex, and NR positioning protocol, NR positioning protocol annex.

14 . An initiator User Equipment (“UE”) for wireless communication, comprising:

at least one memory; and

at least one processor coupled with the at least one memory and configured to cause the UE to:

trigger a sidelink positioning resource request by a higher-layer radio protocol;

request a set of sidelink resources from a radio access network (“RAN”), wherein requesting the set of sidelink resources from the RAN is based on triggered sidelink positioning associated with the initiator UE or a responder UE;

receive a sidelink positioning resource grant for performing a sidelink positioning session with the responder UE, wherein the sidelink positioning resource grant is applicable to both the initiator UE and the responder UE, wherein the sidelink positioning resource grant is associated with source and destination physical layer sidelink positioning identifiers (“IDs”);

reserve a set of sidelink positioning resources, from the sidelink positioning resource grant, for performing the sidelink positioning session between the initiator UE and the responder UE; and

perform the sidelink positioning session using the reserved set of sidelink positioning resources.

15 . A base station for wireless communication, comprising:

at least one memory; and

at least one processor coupled with the at least one memory and configured to cause the base station to:

receive a request for a set of sidelink resources from an initiator UE, wherein the request is based on triggered sidelink positioning associated with the initiator UE or a responder UE;

transmit a sidelink positioning resource grant for performing a sidelink positioning session between the initiator UE and the responder UE, wherein the sidelink positioning resource grant is applicable to both the initiator UE and the responder UE, wherein the sidelink positioning resource grant is associated with a source and destination physical layer sidelink positioning identifier; and

receive a measurement report from the initiator UE, the measurement report associated with a sidelink positioning session between the initiator UE and the responder UE.

16 . The base station of claim 15 , wherein the sidelink positioning resource grant comprises a dynamic positioning grant issued to the initiator UE.

17 . The base station of claim 15 , wherein to receive the request, the at least one processor is configured to cause the base station to receive a periodic ranging request, wherein the sidelink positioning resource grant comprises a configured positioning grant issued to the responder UE.

18 . The base station of claim 17 , wherein the configured positioning grant is activated using RRC signaling.

19 . The base station of claim 17 , wherein the configured positioning grant is activated using DCI signaling.

20 . The base station of claim 15 , wherein to transmit the sidelink positioning resource grant, the at least one processor is configured to cause the base station to transmit a configuration for a plurality of configured grants to the initiator UE, wherein a subset of the configured grants is granted to the initiator UE and wherein a remainder of the configured grants is granted to the responder UE.