Study on System enhancement for Proximity based Services (ProSe) in the 5G System (5GS); Phase 2
The scope of this Technical Report is to study and evaluate the possible architecture enhancements to the 5G Proximity-based Services (5G ProSe) system defined in TS 23.304 [3], based on the relevant Stage 1 requirements defined in TS 22.261 [4], TS 22.278 [5] and TS 22.115 [6] and determine which of the solutions can proceed to normative specifications.
This study will consider architecture enhancements in the following areas:
- Support of single NR PC5 hop UE-to-UE Relay for unicast.
- Enhancement of 5G ProSe UE-to-Network Relay functionality.
- Support of path switching between direct NR Uu communication path and direct NR PC5 communication path (i.e. non-relay case).