UNLICENSED SIDELINK POSITIONING REFERENCE SIGNAL TRANSMISSION AND RESOURCE ALLOCATION
Various aspects of the present disclosure relate to unlicensed sidelink positioning reference signal transmission and resource allocation. An apparatus, such as a UE or other communication device, receives a resource allocation configuration to perform sidelink positioning reference signal (SL-PRS) transmission over unlicensed carriers. The resource allocation configuration can include at least resource block (RB) sets, subchannel sizes, subchannel numbers, and comb-sizes of multiple SL-PRSs. The UE transmits at least one SL-PRS over an unlicensed carrier based at least in part on the resource allocation configuration.
1 . A 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:
receive a resource allocation configuration to perform sidelink positioning reference signal (SL-PRS) transmission over unlicensed carriers, the resource allocation configuration comprising at least resource block (RB) sets, subchannel sizes, subchannel numbers, and comb-sizes of multiple SL-PRSs; and
transmit at least one SL-PRS over an unlicensed carrier based at least in part on the resource allocation configuration.
2 . The UE of claim 1 , wherein the at least one processor is configured to cause the UE to transmit the at least one SL-PRS over one or more unlicensed carriers to multiple communication devices based at least in part on the resource allocation configuration.
3 . The UE of claim 1 , wherein the at least one processor is configured to cause the UE to transmit the multiple SL-PRSs over one or more unlicensed carriers to multiple communication devices based at least in part on the resource allocation configuration.
4 . The UE of claim 1 , wherein the at least one processor is configured to cause the UE to transmit a resource allocation configuration request, and in response, receive the resource allocation configuration.
5 . The UE of claim 1 , wherein the resource allocation configuration is pre-configured by at least one of the UE or a communication device.
6 . The UE of claim 1 , wherein the UE is at least one of a target UE, an anchor UE with or without a known location, a server UE, a client UE, or a roadside unit.
7 . The UE of claim 1 , wherein the at least one processor is configured to cause the UE to transmit the at least one SL-PRS over the unlicensed carrier to a communication device, the communication device being at least one of a base station, a location server, a target UE, an anchor UE with or without a known location, a server UE, a client UE, or a roadside-unit.
8 . The UE of claim 1 , wherein the resource allocation configuration indicates a shared resource pool structure with at least one of RB sets defined for SL-PRS and associated sidelink control information, or the RB sets defined for sidelink data and the associated sidelink control information.
9 . The UE of claim 1 , wherein the resource allocation configuration indicates a shared resource pool structure with RB sets defined for SL-PRS, sidelink data, and associated sidelink control information.
10 . The UE of claim 1 , wherein the resource allocation configuration indicates a dedicated resource pool structure with RB sets defined for SL-PRS and associated sidelink control information.
11 . The UE of claim 1 , wherein the resource allocation configuration comprises at least one of a sidelink bandwidth part (BWP), a sidelink positioning resource pool defined in terms of the RB sets, a SL-PRS bandwidth indication, or an indication of contiguous physical resource block (PRB) resource allocation or interlaced PRS resource allocation.
12 . The UE of claim 1 , wherein a sidelink positioning RB set configuration comprises multiple interlaced transmissions for SL-PRS RB sets with a number of interlaces that are equally spaced according to a parameter that indicates the number of interlaces or RBs between each of the multiple interlaced RB transmissions.
13 . A processor for wireless communication, comprising:
at least one controller coupled with at least one memory and configured to cause the processor to:
receive a resource allocation configuration to perform sidelink positioning reference signal (SL-PRS) transmission over unlicensed carriers, the resource allocation configuration comprising at least resource block (RB) sets, subchannel sizes, subchannel numbers, and comb-sizes of multiple SL-PRSs; and
transmit at least one SL-PRS over an unlicensed carrier based at least in part on the resource allocation configuration.
14 . The processor of claim 13 , wherein the at least one controller is configured to cause the processor to transmit the at least one SL-PRS over one or more unlicensed carriers to multiple communication devices based at least in part on the resource allocation configuration.
15 . The processor of claim 13 , wherein the at least one controller is configured to cause the processor to transmit the multiple SL-PRSs over one or more unlicensed carriers to multiple communication devices based at least in part on the resource allocation configuration.
16 . The processor of claim 13 , wherein the at least one controller is configured to cause the processor to transmit a resource allocation configuration request, and in response, receive the resource allocation configuration.
17 . The processor of claim 13 , wherein the resource allocation configuration is pre-configured by at least one of a user equipment (UE) or a communication device.
18 . The processor of claim 13 , wherein the resource allocation configuration indicates a shared resource pool structure with at least one of RB sets defined for SL-PRS and associated sidelink control information, or the RB sets defined for sidelink data and the associated sidelink control information.
19 . A method performed by a user equipment (UE), the method comprising:
receiving a resource allocation configuration to perform sidelink positioning reference signal (SL-PRS) transmission over unlicensed carriers, the resource allocation configuration comprising at least resource block (RB) sets, subchannel sizes, subchannel numbers, and comb-sizes of multiple SL-PRSs; and
transmitting at least one SL-PRS over an unlicensed carrier based at least in part on the resource allocation configuration.
20 . A first communication device 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 first communication device to:
receive, from a second communication device, a resource allocation configuration to perform sidelink positioning reference signal (SL-PRS) transmission over unlicensed carriers, the resource allocation configuration comprising at least resource block (RB) sets, subchannel sizes, subchannel numbers, and comb-sizes of multiple SL-PRSs; and
transmit at least one SL-PRS to the second communication device over an unlicensed carrier based at least in part on the resource allocation configuration.