The need for serving numerousrequests with different Quality of Service QoSrequirements on the Up/Down Link UDL of a LowEarth Orbit LEO satellite constellation justifies theproposal of a burst level service in this context. Infact, the UDL is a scarce resource that needstherefore to be shared efficiently. Serving requestsat the call level appears to be bandwidth wastefulsince resources are still allocated to acommunication even during silence periods. A burstlevel service on the other hand allows for anincrease in resources utilization while still providingfor QoS requirements. In the context of this study,three service classes are considered: voice service, areal time service with very strict constraints overthe delay and the bandwidth, data service withguarantees but with less stringent requirementsthan what is required for voice, and best effort BEservice with no guarantees requirements. A newform of movable boundary approach, operatingexclusively at the burst level, is used in order toaccommodate a greater number of communicationsof each class. Different techniques for varying theboundary value are proposed and analyzed.
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