In this paper we address the emerging application of mobility to DVB-RCS systems.

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Satellite payloads are becoming much more complex with the evolution towards multimedia applications. Moreover satellite lifetime increases while standard and services evolve faster, necessitating a hardware platform that can evolves for not developing new systems on each change. The same problem occurs in terrestrial systems like mobile networks and a foreseen solution is the software dejned radio technology. In this paper we describe a way of introducing this concept at satellite level to offer to operators the required jlexihility of the system. The digitalfunctions enabling this technology, the hardware components implementing the functions and the reconjigurution processes are detailed. We show that elements of the software radio for satellites exist and that this concept is feasible.

The use of satellites for air traffic management purposes offers many benefits for the future aeronautical communications infrastructure. Satellites can provide seamless and nearly global coverage over land masses, oceans, and remote areas with a reduced terrestrial infrastructure. Research and Development for a new satellite based air-ground data link has been endorsed by the EU Transport Council. It is widely shared among stakeholders that use of this satellite link in dense continental airspace requires new performance standards, which calls for a new ATMdedicated satellite communication standard and the supporting satellite capacity. This paper provides a characterization of the future data communication traffic profile and derives initial bandwidth estimation for a satellite system providing the service in the ECAC region.