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Optimization of WiMax modulation scheme with a cross layer erasure code

Zhang, Lei and Sénac, Patrick and Boreli, Roksana and Diaz, Michel Optimization of WiMax modulation scheme with a cross layer erasure code. (2009) In: WOWMOM 2009 - World of Wireless, Mobile and Multimedia Networks, 15-19 June 2009, Kos, Greece .

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Official URL: http://www.ics.forth.gr/wowmom09/

Abstract

WIMAX (Worldwide Interoperability for Microwave Access) is a promising new networking technology that potentially offers high speed and wide area wireless access services that complement consistently the 3G and WiFi access networks capabilities. The standard proposes an adaptive modulation scheme which allows WiMax nodes to communicate from various modulation coding schemes according to the link quality. However, the standard does not define a detailed link adaptation algorithm and currently, the most largely used modulation adaptation technique is based on a channel quality lookup table. We argue that this method is not able to make the best adaptation decisions and delivers a sub-optimal goodput in numerous communication contexts. In this paper, we propose a novel cross layer based modulation adaptation mechanism which incorporates the use of adaptive erasure code with the physical layer information to significantly improve the goodput and transmission efficiency. Simulation results show that our proposal adapts more efficiently to real environments and achieves a significant gain on the goodput delivered to mobile nodes.

Item Type:Conference or Workshop Item (Paper)
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:Other partners > Australian National University - ANU (AUSTRALIA)
French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE
Other partners > University of New South Wales - UNSW (AUSTRALIA)
Laboratory name:
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Deposited By: Lei ZHANG
Deposited On:12 Mar 2009 14:27

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