Sidelink positioning reference signal transmission with cross-pool resource reservation

1. A wireless communication device in a wireless communication network, comprising:

a transceiver;

a memory; and

a processor communicatively coupled to the transceiver and the memory, wherein the processor and the memory are configured to:

transmit a first sidelink-positioning reference signal (SL-PRS) resource reservation message within resources in a SL communication resource pool, wherein the first SL-PRS resource reservation message identifies a first SL-PRS resource within a SL-PRS resource pool, and the SL communication resource pool is different from the SL-PRS resource pool; and

transmit a first SL-PRS in the first SL-PRS resource within the SL-PRS resource pool.

2. The wireless communication device of claim 1 , wherein the SL-PRS resource pool is reserved for SL-PRS signaling and the SL communication resource pool is reserved for communication of at least one sidelink control or sidelink data.

3. The wireless communication device of claim 1 , wherein the first SL-PRS is transmitted in an absence of transmitting a control signal associated with the first SL-PRS in resources within the SL-PRS resource pool.

4. The wireless communication device of claim 1 , wherein the processor and the memory are further configured to:

receive a second SL-PRS resource reservation message within the resources in the SL communication resource pool from another wireless communication device, wherein the second SL-PRS resource reservation message identifies a second SL-PRS resource within the SL-PRS resource pool; and

select the first SL-PRS resource from resources within the SL-PRS resource pool that exclude the second SL-PRS resource.

5. The wireless communication device of claim 1 , wherein the first SL-PRS resource reservation message identifies a given time in the SL-PRS resource pool to transmit the first SL-PRS.

6. The wireless communication device of claim 1 , wherein the first SL-PRS resource reservation message identifies a starting resource element in the SL-PRS resource pool for transmission of the first SL-PRS.

7. The wireless communication device of claim 1 , wherein the first SL-PRS is mapped to the first SL-PRS resource in a comb pattern.

8. The wireless communication device of claim 1 , wherein the processor and the transceiver are further configured to at least one of:

transmit the first SL-PRS utilizing a given time resource of the SL-PRS resource pool over an entirety of a bandwidth of the SL-PRS resource pool; or

transmit the first SL-PRS utilizing the given time resource of the SL-PRS resource pool over a sub-band of the bandwidth of the SL-PRS resource pool.

9. The wireless communication device of claim 1 , wherein the processor and the transceiver are further configured to at least one of:

transmit the first SL-PRS in resources within the SL-PRS resource pool once,

transmit the first SL-PRS in resources within the SL-PRS resource pool more than once,

transmit the first SL-PRS as one of a predetermined plurality of transmitted respective SL-PRSs in a corresponding plurality of respective SL-PRS resource pools, or

transmit the first SL-PRS as one of a semi-statically configured transmission of a plurality of respective SL-PRSs in the corresponding plurality of respective SL-PRS resource pools.

10. The wireless communication device of claim 1 , wherein the wireless communication device is one of at least two wireless communication devices in a group of wireless communication devices that together utilize respective round trip time measurements, based on transmissions of respective SL-PRSs, including the first SL-PRS, to determine a physical location of the wireless communication device.

11. The wireless communication device of claim 1 , wherein the processor and the memory are further configured to:

reserve a different SL-PRS resource identified in a different SL-PRS resource reservation message for use by another wireless communication device.

12. The wireless communication device of claim 1 , wherein the processor and the memory are further configured to:

reserve the first SL-PRS resource in the first SL-PRS resource reservation message for a shared use by the wireless communication device and another wireless communication device.

13. A method of wireless communication at a wireless communication device in a wireless communication network comprising:

transmitting a first sidelink-positioning reference signal (SL-PRS) resource reservation message within resources in a SL communication resource pool, wherein the first SL-PRS resource reservation message identifies a first SL-PRS resource within a SL-PRS resource pool, and the SL communication resource pool is different from the SL-PRS resource pool; and

transmitting a first SL-PRS in the first SL-PRS resource within the SL-PRS resource pool.

14. The method of claim 13 , further comprising:

receiving a second SL-PRS resource reservation message in within the resources the SL communication resource pool from another wireless communication device, wherein the second SL-PRS resource reservation message identifies a second SL-PRS resource within the SL-PRS resource pool; and

selecting the first SL-PRS resource from resources within the SL-PRS resource pool that exclude the second SL-PRS resource.

15. The method of claim 13 , further comprising at least one of:

transmitting the first SL-PRS utilizing a given time resource of the SL-PRS resource pool over an entirety of a bandwidth of the SL-PRS resource pool; or

transmitting the first SL-PRS utilizing the given time resource of the SL-PRS resource pool over a sub-band of the bandwidth of the SL-PRS resource pool.

16. The method of claim 13 , further comprising at least one of:

transmitting the first SL-PRS in the SL-PRS resource pool once,

transmitting the first SL-PRS in the SL-PRS resource pool more than once,

transmitting the first SL-PRS as one of a predetermined plurality of transmitted respective SL-PRSs in a corresponding plurality of respective SL-PRS resource pools, or

transmitting the first SL-PRS as one of a semi-statically configured transmission of a plurality of respective SL-PRSs in the corresponding plurality of respective SL-PRS resource pools.

17. The method of claim 13 , further comprising:

reserving a different SL-PRS resource identified in a different SL-PRS resource reservation message for use by another wireless communication device.

18. The method of claim 13 , further comprising:

reserving the first SL-PRS resource in the first SL-PRS resource reservation message for a shared use by the wireless communication device and another wireless communication device.

19. A wireless communication device in a wireless communication network, comprising:

a transceiver;

a memory; and

a processor communicatively coupled to the transceiver and the memory, wherein the processor and the memory are configured to utilize the transceiver to:

receive a first sidelink-positioning reference signal (SL-PRS) resource reservation message within resources in a SL communication resource pool, wherein the first SL-PRS resource reservation message identifies a first SL-PRS resource within a SL-PRS resource pool, and the SL communication resource pool is different from the SL-PRS resource pool; and

receive a first SL-PRS in the first SL-PRS resource within the SL-PRS resource pool.

20. The wireless communication device of claim 19 , wherein the SL-PRS resource pool is reserved for SL-PRS signaling and the SL communication resource pool is reserved for communication of at least one sidelink control or sidelink data.

21. The wireless communication device of claim 19 , wherein the first SL-PRS is received in an absence of receiving of a control signal associated with the first SL-PRS in resources within the SL-PRS resource pool.

22. The wireless communication device of claim 19 , wherein the processor and the memory are further configured to:

receive a second SL-PRS resource reservation message within the resources in the SL communication resource pool, wherein the second SL-PRS resource reservation message identifies a second SL-PRS resource within the SL-PRS resource pool; and

receive a second SL-PRS in the second SL-PRS resource within the SL-PRS resource pool, wherein the second SL-PRS resource is different from the first SL-PRS resource.

23. The wireless communication device of claim 19 , wherein the first SL-PRS resource reservation message identifies a given time in the SL-PRS resource pool corresponding to transmission of the first SL-PRS.

24. The wireless communication device of claim 19 , wherein the first SL-PRS resource reservation message identifies a starting resource element in the SL-PRS resource pool corresponding to transmission of the first SL-PRS.

25. The wireless communication device of claim 19 , wherein the first SL-PRS is mapped to the first SL-PRS resource in a comb pattern.

26. The wireless communication device of claim 19 , wherein the processor and the transceiver are further configured to least one of:

receive the first SL-PRS utilizing a given time resource of the SL-PRS resource pool over an entirety of a bandwidth of the SL-PRS resource pool; or

receive the first SL-PRS utilizing the given time resource of the SL-PRS resource pool over a sub-band of the bandwidth of the SL-PRS resource pool.

27. The wireless communication device of claim 19 , wherein the processor and the transceiver are further configured to least one of:

receive the first SL-PRS in the SL-PRS resource pool once,

receive the first SL-PRS in the SL-PRS resource pool more than once,

receive the first SL-PRS as one of a predetermined plurality of received respective SL-PRSs in a corresponding plurality of respective SL-PRS resource pools, or

receive the first SL-PRS as one of a semi-statically configured transmission of a plurality of respective SL-PRSs in the corresponding plurality of respective SL-PRS resource pools.

28. The wireless communication device of claim 19 , wherein the wireless communication device is one of at least two wireless communication devices in a group of wireless communication devices that together utilize respective round trip time measurements, based on transmissions of respective SL-PRSs, including the first SL-PRS, to determine a physical location of the wireless communication device.

29. The wireless communication device of claim 19 , wherein the first SL-PRS resource reserved in the first SL-PRS resource reservation message is reserved by the wireless communication device for use by another wireless communication device.

30. The wireless communication device of claim 19 , wherein the first SL-PRS resource reserved in the first SL-PRS resource reservation message reserves the first SL-PRS resource for shared use by the wireless communication device and another wireless communication device.