4 Overview

29.5033GPP5G SystemRelease 18Stage 3TSUnified Data Management Services

4.1 Introduction

Within the 5GC, the UDM offers services to the AMF, SMF, SMSF, NEF, GMLC, NWDAF, AUSF, HSS, GBA’s BSF, SMS-GMSC, DCCF and 5GDDNMF via the Nudm service-based interface (see 3GPP TS 23.501 [2], 3GPP TS 23.502 [3], 3GPP TS 23.288 [35], GPP TS 23.304 [57], 3GPP TS 23.540 [66], and 3GPP TS 33.503[64]).

Figure 4.1-1 provides the reference model (in service-based interface representation and in reference point representation), with focus on the UDM.

Figure 4.1-1: Reference model – UDM

The functionalities supported by the UDM are listed in clause 6.2.7 of 3GPP TS 23.501 [2].