4.2.4 Service-based interfaces

23.5863GPPArchitectural Enhancements to support Ranging based services and Sidelink PositioningRelease 18TS

Nlmf: In addition to the relevant services defined in TS 23.273 [8], if the LMF support SL Positioning and Ranging-based service, it may be used to provide service to other NFs related to it.

Nudm: In addition to the relevant services defined in TS 23.501 [2] for Nudm, in the case of SL Positioning and Ranging-based service, services provided by UDM are used to get the related subscription information to AMF during Initial registration procedure or UE Configuration Update (UCU) procedure to inform AMF subscription information has changed.

Npcf: In addition to the relevant services defined in TS 23.501 [2] for Npcf, in the case of SL Positioning and Ranging-based service, services provided by H-PCF are used to provide SL Positioning and Ranging Service related parameters to V-PCF for UE and NG-RAN in the roaming case.

Nudr: In addition to the relevant services defined in TS 23.501 [2] for Nudr, in the case of SL Positioning and Ranging-based service, services provided by UDR are used to notify the PCF and the UDM of the update of the SL Positioning and Ranging-based service related information.

Namf: In addition to the relevant services defined in TS 23.501 [2] for Namf, in the case of SL Positioning and Ranging-based service, services provided by AMF are consumed by PCF to provide the SL Positioning and Ranging-based service related parameters for the UE and the NG-RAN to AMF, and to enable the AMF create or update UE context related to SL Positioning and Ranging-based service.