4 Overview

29.5423GPP5G SystemRelease 18Session management services for Non-IP Data Delivery (NIDD)Stage 3TS

4.1 Introduction

Within the 5GC, the SMF offers services to the NF service consumers via the Nsmf service based interface (see 3GPP TS 23.501 [2] and 3GPP TS 23.502 [3]).

Figure 4.1-1 provides the reference model (in service based interface representation and in reference point representation), with focus on the services specified within the present specification.

Figure 4.1-1: Reference model – SMF

N29 is the reference point between the (H-)SMF and the NEF.

The functionalities supported by the SMF are listed in clause 6.2.2 of 3GPP TS 23.501 [2].