Title: A prediction-based scheduling mechanism for interconnection between WiMax and satellite networks

Authors: Anastasia Lygizou, Spyros Xergias, Nikos Passas, Lazaros Merakos

Addresses: Communication Networks Laboratory, Department of Informatics and Telecommunications, University of Athens, Panepistimiopolis, Ilisia, Athens 15784, Greece. ' Communication Networks Laboratory, Department of Informatics and Telecommunications, University of Athens, Panepistimiopolis, Ilisia, Athens 15784, Greece. ' Communication Networks Laboratory, Department of Informatics and Telecommunications, University of Athens, Panepistimiopolis, Ilisia, Athens 15784, Greece. ' Communication Networks Laboratory, Department of Informatics and Telecommunications, University of Athens, Panepistimiopolis, Ilisia, Athens 15784, Greece

Abstract: In this article, we describe and evaluate a scheduling mechanism that can be used in joint WiMax/satellite environments. The proposed mechanism consists of three parts. The first part requests satellite bandwidth based on an estimation of the needs of the WiMax network at the time the bandwidth is granted, the second part allocates bandwidth on the satellite channel, while the third distributes it to the WiMax users. Simulation results show considerably improved performance compared to a simpler mechanism without prediction, especially in terms of throughput and delay.

Keywords: DVB-RCS; digital video broadcasting; return channel satellite; IEEE 802.16; prediction; QoS; quality of service; satellite interactive networks; traffic scheduling; WiMax networks; satellite bandwidth; simulation; worldwide interoperability for microwave access; bandwidth allocation.

DOI: 10.1504/IJAACS.2009.024414

International Journal of Autonomous and Adaptive Communications Systems, 2009 Vol.2 No.2, pp.107 - 127

Published online: 03 Apr 2009 *

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