Architecture system definition is analysed in this project. As starting point have been defined several scenarios
- Satellite as simple backhaul of 5G base station
- Satellite as support of aggregated non-3GPP access
- Satellite interconnecting 5GC located on board HAPS
Additionally, other variants could be proposed, by implementing some technology enablers previously described within the Satellite Backhauled HAPS architecture. Firstly, a transparent satellite payload is assumed, New Radio is used over the satellite backhaul link.
Then the most advanced technology is assumed, with regenerative payloads (more suitable for implementation with LEO constellation). A complete 5G integration level is achieved.
Finally, ground UEs are not 3GPP managed UEs but are instead any generic device equipped with a wireless connection (could be some WIFI access, WIMAX (802.16), other communication standard, or possibly a dedicated future waveform operating in its authorized frequency band, shared or not) allowing the connection to the HAPS. Ground UEs and HAPS are logically under a pseudo LAN model, as studied in 3GPP TR 22.821 considering a home (residential) LAN case