4 Overview

29.5653GPP5G SystemRelease 18Stage 3Time Sensitive Communication and Time Synchronization Function ServicesTS

4.1 Introduction

The Ntsctsf services are offered by the TSCTSF to support the Time Sensitive Communications and Time Synchronization.

The following services are specified:

– Ntsctsf_TimeSynchronization service;

– Ntsctsf_QoSandTSCAssistance service.

– Ntsctsf_ASTI service.

4.2 Service Architecture

The 5G System Architecture is defined in 3GPP TS 23.501 [2].

The known NF service consumers of the Ntsctsf services are the Application Function (AF) within the operator’s trust domain and the Network Exposure Function (NEF).

The Ntsctsf services are provided by the TSCTSF and consumed by the NF service consumers (e.g. AF, NEF), as shown in figure 4.2-1 for the SBI representation model and in figure 4.2-2 for the reference point representation model.

Figure 4.2-1: Ntsctsf services architecture, SBI representation

Figure 4.2-2: Ntsctsf services architecture, reference point representation