Multiple Access for ATM-Based Multiservice Satellite Networks
نویسندگان
چکیده
In this paper we present and evaluate a hybrid-modular multiple access protocol for ATM transmission in a multiservice satellite system. Given appropriate synchronization and Doppler (shift) compensation, the protocol components can cope with the dynamics of the satellite constellation and are suitable to both mobile and fixed user environments. The general protocol framework is first given with an adaptive random-reservation protocol which can on principle support all ATM service classes over low earth orbit (LEO), medium earth orbit (MEO) and geostationary earth orbit (GEO) satellites while providing the required Quality of Service (QoS). In a second step, an optimized MAC protocol module for bandwidth-efficient support of rt-VBR traffic over LEO satellites is presented. The simulation based performance evaluation proves that the protocols allow to efficiently use statistical multiplexing of ATM traffic over the air interface, both for real-time and non-real-time bursty traffic.
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