4 Overview

29.5533GPP5G ProSe Anchor Services5G SystemRelease 18Stage 3TS

The Prose Anchor Function (PAnF) is the network entity in the 5G Core Network (5GC) supporting security procedure over Control Plane for the 5G ProSe UE-to-Network relay as specified in 3GPP TS 33.503 [14]. Within the 5GC, the PAnF offers services to the AUSF via the Npanf service based interface.

Figure 4-1 provides the reference model (in service based interface representation and in reference point representation), with focus on the PAnF:

Figure 4-1: Reference model – PAnF

The PAnF supports the following functionalities:

– Storage and retrieval of ProSe context information of the 5G ProSe Remote UE;

– Checking whether the 5G ProSe Remote UE is authorized to use the UE-to-Network Relay service.