4 Overview

29.5723GPP5G SystemLocation Management ServicesRelease 18Stage 3TS

The Location Management Function (LMF) is the network entity in the 5G Core Network (5GC) supporting the following functionality:

– Supports location determination for a UE.

– Obtains downlink location measurements or a location estimate from the UE.

– Obtains uplink location measurements from the NG RAN.

– Obtains non-UE associated assistance data from the NG RAN.

– Provides broadcast assistance data to UEs and forwards associated ciphering keys to an AMF.

Other functions of an LMF are listed in clause 4.3.8 of 3GPP TS 23.273 [19].

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

Figure 4-1: Reference model – LMF