Optimization of WiMax modulation scheme with a cross layer erasure code

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 resu...

• Type: Conference
• Year: 2009
• Where: WOWMOM
• Authors: Lei Zhang, Patrick Sénac, Roksana Boreli, Michel Diaz
• Keywords: Modulation Adaptation, Modulation Adaptation Mechanism, Modulation Adaptation Technique, Multimedia, WOWMOM 2009