4 Overview

29.5633GPP5G SystemHome Subscriber Server (HSS) services for interworking with Unified Data Management (UDM)Release 18Stage 3TS

4.1 Introduction

Within the 5GC, the HSS offers services to the UDM via the Nhss service-based interface (see 3GPP TS 23.501 [2], 3GPP TS 23.502 [3] and 3GPP TS 23.632 [8]).

Figure 4.1-1 provides the reference model in service-based interface representation with focus on the HSS.

Figure 4.1-1: Reference model – HSS