ATM via satellite: a framework and implementation
Wireless Networks - Special issue: hybrid and satellite communication networks
MB-ICBT Protocol Performance in Star-Configured VSAT Satellite Networks
ISCC '97 Proceedings of the 2nd IEEE Symposium on Computers and Communications (ISCC '97)
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The introduced gateway architecture for DVB-based geostationary satellite networks has been developed for the European Community project "GOECAST" (multiCAST over GEOstationary satellites) and aims at supporting the real-time (RT) traffic feeding the Gateway Earth Stations (GES). GESs provide the access to the satellite network to a large number of RT flows, whose delay constraints have to be guaranteed without affecting the lower priority traffic. A tight control on the queuing delays is obtained by the proposed scheduling scheme, while the proposed buffering scheme allows the scalability requirement to be met by means of a proper traffic aggregation criterion. Finally, the 'stolen slot' concept is introduced: whenever the RT traffic transmission rate is lower than the nominal rate, the 'stolen-slot' procedure allows the utilisation of the leftover bandwidth, considering also the multicast issues. Simulations have been performed with the OPNET tool to test the effectiveness of the proposed schemes and algorithms.