4 General

24.5543GPPProximity-services (ProSe) in 5G System (5GS) protocol aspectsRelease 17Stage 3TS

4.1 Overview

5G Proximity-based Services (ProSe) are services that can be provided by the 3GPP system based on UEs being in proximity to each other. In this release of the document, the 3GPP system enablers for 5G ProSe include the following functions:

a) 5G ProSe direct discovery;

b) 5G ProSe direct communication; and

c) 5G ProSe UE-to-network relay.

The above functions are applicable for both public safety UE and commercial UEs.

The security aspects for 5G ProSe features are specified in 3GPP TS 33.503 [34].