Programme Element: ARTES 5.1
Tender nr.: AO 1-7492
Open from: 16 Apr 2013
Closes on: 11 Jun 2013
Objective: To develop control mechanisms that dynamically allocate satellite and ground communication resources and that dynamically balance user load in future broadband satellite networks with very high number of spotbeams - in the face of the user traffic demand that is both temporally and spatially varying.
Targeted Improvements: 30% improvement in bandwidth efficiency thanks to dynamic and time-varying resource allocation under some mild assumptions.
Frequency reuse over a high number of narrow beams is the key enabler towards the terabit/s-grade service provision in future broadband SATCOM. There are already studies to optimise beam sizes and frequency/power allocation to match the non-uniform spatial distribution of user traffic demand. However, the demand distribution is not only spatially, but also temporally varying. It is argued that future Ka-band multibeam satellite networks need control mechanisms that dynamically allocate satellite and ground communication resources - power/ frequency/time - in line with the recent observation/prediction of user traffic demand across the service area. It is also argued that accompanying control mechanisms are needed to balance user traffic demand across the adjacent spotbeams via dynamic load-balancing and handover techniques.
The reference system is a high-capacity transparent GEO satellite with very high number (200+) of spotbeams and (30+) gateways. The study shall consider various levels of on-board flexibility; including beam-hopping and flexible power/frequency allocation. As a baseline, load monitoring/prediction mechanisms, combinatorial optimisation techniques for global resource allocation, and joint-optimisation with packet-level scheduling shall be considered to maximise efficiency while maintaining acceptable adjacent/co-channel interference. It is well understood that sheer resource availability is not sufficient unless the resources are made available at the right location at the right time. In the return link of broadband systems, smart resource allocation strategies that try to minimise the intra-system interference will also be investigated. The proposed study is complementary to recent/on-going ARTES studies on resource management and fade mitigation techniques in multibeam satellite systems.