Study on 5G System with Satellite Backhaul
The scope of this Technical Report is to study the following aspects of 5GS with satellite backhaul:
1: Architecture enhancements for support of a backhaul with changing delay (e.g. brought by ISL in satellite networks or changed satellite backhaul on the UP path), and possibly limited bandwidth in case of a gNB with satellite backhaul only (e.g. restricted by the maximum data rate of a satellite beam):
- Policy/QoS control enhancements based on the detected packet delivery latency and/or bandwidth of the satellite backhaul on the UP path;
- Exposure of backhaul information to AFs.
2: Architecture enhancements for support of UPF deployed on GEO satellite with gNB on the ground:
- Whether and how to enable satellite edge computing services via UPF on-board e.g. to reduce the latency for data transmission, and minimize the backhaul resources consumption.
- How to enhance local switch for UEs in a communication when they are served by UPF on-board, e.g. to reduce end to end delay comparing with existing 5G LAN local switch at PSA on the ground.