Journal of South China University of Technology (Natural Science Edition) ›› 2010, Vol. 38 ›› Issue (10): 57-60,67.doi: 10.3969/j.issn.1000-565X.2010.10.011

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

Unsaturated Performance of IEEE 802.11 DCF Based on Queuing Networks

Xie Hong-gang  Xiao Jin-sheng  Yi Ben-shun   

  1. School of Electronic Information,Wuhan University,Wuhan 430072,Hubei,China
  • Received:2010-01-29 Revised:2010-03-29 Online:2010-10-25 Published:2010-10-25
  • Contact: 谢红刚（1973-），男，博士生，主要从事无线网络资源优化研究． E-mail:honggang．xie@gmail．com
  • About author:谢红刚（1973-），男，博士生，主要从事无线网络资源优化研究．
  • Supported by:

    湖北省自然科学基金资助项目（2009cdb328）; 武汉大学自主科研项目（6082003）

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Abstract:

In order to evaluate the performance of IEEE 802.11 distributed coordination function（DCF） with unsaturated traffic,the procedure of DCF backoff and the queuing buffer of media access control（MAC） layer are modeled,and a model based on closed queuing networks is established.Then,the expressions describing the transmission rate and the throughput under unsaturated traffic load are deduced by employing the proposed model,and the effects of the terminal number,the traffic load and the package size on the network performance are analyzed.Simulated results show that the proposed model can effectively evaluate the unsaturated performance of DCF.

Key words: queuing networks, unsaturated throughput, performance analysis, distributed coordination function