Configuration of sidelink positioning reference signals

1 . An apparatus comprising processing circuitry coupled to a memory, wherein the processing circuitry is configured to perform operations comprising:

receive a sidelink (SL) positioning reference signal (PRS) configuration information, wherein the SL-PRS configuration information is associated with one or more SL-PRS resources configured for one or more assisting user equipments (UEs) in a vicinity of a location assisted UE, wherein the SL-PRS resource configuration information is received as part of assistance data from a location management function (LMF) of a fifth-generation core network (5GC), wherein the assistance data further comprises an azimuth parameter and an elevation parameter associated with the SL-PRS resources for the one or more assisting UEs;

generate, for transmission, a reference signal (RS) reception capability, wherein the RS reception capability includes parameters for a Uu interface and a PC5 interface; and

measure SL-PRS transmitted from the one or more assisting UEs.

2 . The apparatus of claim 1 , wherein the one or more SL-PRS resources are configured on a same positioning frequency layer (PFL) as a downlink (DL)-PRS and share a same subcarrier spacing (SCS), cyclic prefix (CP), and DL-PRS-PointA as DL-PRS resources.

3 . The apparatus of claim 1 , wherein the one or more SL-PRS resources are configured on a same PFL as a DL-PRS and share a same DL-PRS-PointA, wherein the one or more SL-PRS resources have a first SCS and a first CP, and wherein DL-PRS resources have a second SCS and a second CP different than the first SCS and the first CP.

4 . The apparatus of claim 1 , wherein the one or more SL-PRS resources are configured on a different PFL than a DL-PRS.

5 . The apparatus of claim 1 , wherein the SL-PRS is configured to be spatially related to an SL-synchronization signal block (SSB), an SL physical sidelink control channel (PSCCH), an SL-channel state information (CSI)-reference signal (RS), or an SL physical sidelink shared channel (PSSCH) of the one or more assisting UEs or the UE.

6 . The apparatus of claim 1 , wherein the SL-PRS is configured to be spatially related to a DL-PRS, a DL-SSB, or a DL-CSI-RS received by the one or more assisting UEs or to a sounding reference signal (SRS) transmitted by the one or more assisting UEs.

7 . The apparatus of claim 1 , further comprising:

sending a request to the one or more assisting UEs to activate one of the SL-PRS resources.

8 . The apparatus of claim 1 , wherein, based on the UE being within a coverage area of a network, the SL-PRS resource configuration is received from a base station of the network, wherein the SL-PRS resource configuration is one of a UE specific configuration or a cell specific configuration.

9 . The apparatus of claim 1 , wherein, based on the UE being outside of a coverage area of a network, the UE receives the SL-PRS resource configuration prior to moving outside the coverage area of the network.

10 . The apparatus of claim 1 , wherein, based on the UE being outside of a coverage area of a network, the UE receives the SL-PRS resource configuration from one of the one or more assisting UEs.

11 . The apparatus of claim 1 , wherein the operations further comprise:

transmitting a request that the one or more assisting UEs transmit the SL-PRS to the UE.

12 . The apparatus of claim 1 , wherein the RS reception capability is transmitted to the one or more assisting UEs or a base station.

13 . An apparatus comprising processing circuitry coupled to a memory, wherein the processing circuitry is configured to perform operations comprising:

receive a sidelink (SL) positioning reference signal (PRS) configuration information, wherein the SL-PRS configuration information is associated with SL-PRS resources to be transmitted via a sidelink to a location assisted user equipment (UE) in a vicinity of a location assisting UE, wherein the SL-PRS configuration information is received as part of assistance data from a location management function (LMF) of a fifth-generation core network (5GC), wherein the assistance data further comprises an azimuth parameter and an elevation parameter associated with the SL-PRS resources for the location assisting UEs, and wherein the location assisted UE generates a reference signal (RS) reception capability which includes parameters for a Uu interface and a PC5 interface; and

generate, for transmission, SL-PRS to the location assisted UE based on the SL-PRS resource configuration.

14 . The apparatus of claim 13 , wherein, based on the location assisting UE being within a coverage area of a network, the SL-PRS resource configuration is received via one of a radio resource control (RRC) message or a positioning system information block (PosSIB).

15 . The apparatus of claim 13 , wherein, based on the location assisting UE being within a coverage area of a network and the SL-PRS resource configuration comprises multiple SL-PRS resources, the operations further comprise:

receiving a medium access control-control element (MAC-CE) or downlink control information (DCI) to indicate which one of the multiple SL-PRS resources is to be activated, wherein the MAC-CE or DCI further indicates a duration during which the one of the multiple SL-PRS resources is to be activated.

16 . The apparatus of claim 13 , wherein the receiving is performed while the location assisting UE is within a coverage area of a network, and wherein, based on the location assisting UE being outside of the coverage area of the network, the location assisting UE uses the SL-PRS resource configuration received when the location assisting UE was within the coverage area of the network.

17 . The apparatus of claim 13 , further comprising:

transmitting the SL-PRS resource configuration to the location assisted UE when the location assisted UE is outside of a coverage area of a network.

18 . The apparatus of claim 13 , wherein the operations further comprise:

receiving, from the location assisted UE, a request to transmit the SL-PRS.

19 . A non-transitory computer readable storage medium comprising a set of instructions, wherein the set of instructions when executed by a processor cause the processor of a user equipment (UE) to perform operations, comprising:

receive a sidelink (SL) positioning reference signal (PRS) configuration information, wherein the SL-PRS configuration information is associated with one or more SL-PRS resources configured for one or more assisting user equipments (UEs) in a vicinity of a location assisted UE, wherein the SL-PRS resource configuration information is received as part of assistance data from a location management function (LMF) of a fifth-generation core network (5GC), wherein the assistance data further comprises an azimuth parameter and an elevation parameter associated with the SL-PRS resources for the one or more assisting UEs;

generate, for transmission, a reference signal (RS) reception capability, wherein the RS reception capability includes parameters for a Uu interface and a PC5 interface; and

measure SL-PRS transmitted from the one or more assisting UEs.