Journal of Computer Science and Technology

, Volume 18, Issue 5, pp 607–614 | Cite as

IEEE 802.11 Distributed Coordination Function: Enhancement and analysis

  • Wu HaiTao 
  • Lin Yu 
  • Cheng ShiDuan 
  • Peng Yong 
  • Long KePing 


IEEE 802.11 Medium Access Control (MAC) is proposed to support asynchronous and time bounded delivery of radio packets. Distributed Coordination Function (DCF), which uses Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) and binary slotted exponential backoff, is the basis of the 802.11 MAC. This paper proposes a throughput enhancement for DCF by adjusting the Contention Window (CW) setting scheme. Moreover, an, analytical model based on Markov chain is introduced to compute the enhanced throughput. The accuracy of the model and the enhancement of the proposed scheme are verified by elaborate simulations.




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Copyright information

© Science Press, Beijing China and Allerton Press Inc. 2003

Authors and Affiliations

  • Wu HaiTao 
    • 1
  • Lin Yu 
    • 1
  • Cheng ShiDuan 
    • 1
  • Peng Yong 
    • 1
  • Long KePing 
    • 1
  1. 1.National Key Lab of Switching Technology and Telecommunication NetworksBeijing University of Posts and TelecommunicationsBeijingP. R. China

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