Abstract
This paper presents a mechanism for dynamic rate control of satellite integrated services, based on a cross-layer approach, utilising link quality feedback from the satellite terminals. The mechanism, namely, satellite resource management system (SRMS) relies on the adaptive coding and modulation (ACM) capabilities of DVB-S2 in order to perform real-time adjustments on the physical, network and services layer and optimise the usage of satellite spectrum. The functionality of the SRMS is discussed along with its implementation in the frame of the IST IMOSAN Project. Simulation results are presented, involving modelled rain fading and prioritised heterogeneous services, which illustrate the efficiency of the proposed solution against current static transmission schemes.
Highlights
Satellite platforms are the only medium for the provision of integrated/triple-play services in cases where terrestrial networks are inadequate, for example, in rural and underdeveloped regions or in long-range transportation media
Their high-capacity and wide-coverage capabilities are in a sense counterbalanced by the high cost of the satellite spectrum, which has a direct impact on the end-user costs [1]
A significant step towards this optimisation has been the introduction of the DVB-S2 specification, featuring nearShannon-limit performance along with adaptive coding and modulation (ACM) [2] to compensate for variations in satellite link quality, caused by several factors, such as attenuation due to rain and atmospheric gases, scintillation, depolarisation, and interference [3, 4]
Summary
Satellite platforms are the only medium for the provision of integrated/triple-play services in cases where terrestrial networks are inadequate, for example, in rural and underdeveloped regions or in long-range transportation media. Their high-capacity and wide-coverage capabilities are in a sense counterbalanced by the high cost of the satellite spectrum, which has a direct impact on the end-user costs [1]. A crosslayer approach, extending to the services layer, is required as the one proposed in [6], but at this time including physicallayer adaptation This is achieved by the proposed satellite resource management system (SRMS), currently under development in the frame of the EU-funded IST IMOSAN (FP6IST-027457) project
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