4 Overview

29.5323GPP5G Multicast-Broadcast Session Management Services5G SystemRelease 17Stage 3TS

4.1 Introduction

Within the 5GC, the MB-SMF offers services to the SMF, AMF, AF/AS, MBSF and NEF via the Nmbsmf service based interface (see 3GPP TS 23.501 [2], 3GPP TS 23.502 [3] and 3GPP TS 23.247 [14]).

Figure 4.1-1 provides the reference model (in service based interface representation and in reference point representation), with focus on the MB-SMF and the scope of the present specification.

Figure 4.1-1: Reference model – MB-SMF

N11mb is the reference point between MB-SMF and AMF.

N16mb is the reference point between MB-SMF and SMF.

N29mb is the reference point between MB-SMF and NEF.

Nmb1 is the reference point between MB-SMF and MBSF.

Nmb13 is the reference point between MB-SMF and AF/AS.

The functionalities supported by the MB-SMF are listed in clause 5.3.2.2 of 3GPP TS 23.247 [14].