Abstract

Different users with diverse requirements need to share effciently the Up/Down Link UDL of a Low Earth Orbit LEO satellite constellation. Three types of services are assumed: real time (voice) services with strict constraints over the delay and the bandwidth, non real time (data) services delay tolerant but with bandwidth guarantees requirements and Best Effort services with no guarantees requirements. The scheme proposed consists in dedicating a certain amount of the total bandwidth for serving real time services, while the remaining bandwidth is shared according to a strict priority scheduling scheme between the two data services considered. All services are served as “bursts”. Markovian ON-OFF source models are considered, together with a Pareto distribution for data packet lengths with a cut-off at 1502 bytes. The impact of the amount of dedicated bandwidth for real time services on the performance measures of all traffic classes is evaluated.Key wordsAccess NetworksPerformance AnalysisSatellite Networks

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