Design and analysis of an adaptive backoff algorithm for IEEE 802.11 DCF mechanism

  • Authors:
  • Mouhamad Ibrahim;Sara Alouf

  • Affiliations:
  • INRIA, Sophia Antipolis, France;INRIA, Sophia Antipolis, France

  • Venue:
  • NETWORKING'06 Proceedings of the 5th international IFIP-TC6 conference on Networking Technologies, Services, and Protocols; Performance of Computer and Communication Networks; Mobile and Wireless Communications Systems
  • Year:
  • 2006

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Abstract

This paper presents an adaptive backoff algorithm for the contention-based Distributed Coordination Function (DCF) of the IEEE 802.11 standard. Relying on on-line measurements of the number of sources, the algorithm, called Adaptive BEB, judiciously sets the size of the minimal contention window to adapt to the congestion level in the shared medium. The paper also provides an extension to Adaptive BEB for enhancing its performance over noisy channels. In this extension, a simple EWMA filter is used to derive a Packet Error Rate estimator. The performance evaluation of our proposal is addressed via simulations.