4.1 General concept

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

Ranging based service provides the distance between two UEs or more UEs and/or the direction of one UE (i.e. Target UE) from another UE (i.e. Reference UE) via PC5 operations.

Sidelink Positioning provides absolute location, relative position, or Ranging information of a UE by using PC5 for the positioning. A Located UE can be used to determine the absolute location of a Target UE using Sidelink Positioning.

The operation of Ranging/Sidelink Positioning can be performed with either Network-assisted Operation or UE-only Operation:

– In the Network-assisted Operation, 5GC NF(s) is involved for the service request handling and result calculation.

– In the UE-only Operation, the service request handling and result calculation are performed by UE.

The Ranging/Sidelink Positioning service request can be initiated by a UE (i.e. SL Positioning Client UE, Target UE, SL Reference UE), a 5GC NF, an LCS Client or an AF.