Frequency re-use over a high number of narrow spotbeams is the key enabling solution towards the terabit/s satellite capacity in future broadband satellite communications. In this context, the adopted frequency plan plays a key role in determining the system performance, because the impact of co-channel interference may significantly affect the signal quality. Recent studies have indicated non-uniform spatial distribution of the user traffic demand, and hence, prove that uniform beam sizing and frequency/power allocation fails to meet the user traffic demand in hot spots. Furthermore, as the user traffic demand distribution is not only spatially non-uniform, but also temporally varying, static optimisation approaches may fail to cope sufficiently well with the time-varying nature of the user traffic demand. Future broadband satellite networks will need control mechanisms that dynamically and globally (i.e., global within in the whole designated service area) allocate satellite and ground communication resources - power/frequency/time - in line with the recent observation/prediction of user traffic demand distribution across the service area.
- German Aerospace Center (DLR) (Research Institute, Germany)
The project is closed: 30/06/2015