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应用科学学报 ›› 2013, Vol. 31 ›› Issue (1): 41-47.doi: 10.3969/j.issn.0255-8297.2013.01.007

• 通信工程 • 上一篇    下一篇

IEEE 802.11 DCF协议性能分析模型

钟萍， 施海彬， 庄玉祥， 石江宏， 陈辉煌   

  1. 厦门大学信息科学与技术学院，福建厦门361005
  • 收稿日期:2011-07-09 修回日期:2011-09-16 出版日期:2013-01-31 发布日期:2013-01-31
  • 作者简介:钟萍，博士，研究方向：无线自组织网、无线传感网接入协议，E-mail: apple.zhong@yahoo.com.cn；石江宏，副教授，博导，研 究方向：数字移动通信系统、自组织网络接入技术，E-mail: shijh@xmu.edu.cn；陈辉煌，教授，博导，研究方向：通信与信息系 统、电路与系统，E-mail: hhchen@xmu.edu.cn
  • 基金资助:

    福建省科技重大专项基金(No.2007HZ0003)；福建省自然科学基金(No.2010J01347)资助

Performance Analysis Model for IEEE 802.11 Distributed Coordination Function Protocol

ZHONG Ping, SHI Hai-bin, ZHUANG Yu-xiang, SHI Jiang-hong, CHEN Hui-huang   

  1. School of Information Science and Technology, Xiamen University, Xiamen 361005, Fujian Province, China
  • Received:2011-07-09 Revised:2011-09-16 Online:2013-01-31 Published:2013-01-31

PDF

2291

被引次数

9

摘要： 提出了一种改进的二维Markov链模型用于分析IEEE 802.11 DCF协议. 该模型不仅考虑实际应用中饱和业务量和非饱和业务量的情况，而且考虑DCF协议的退避计时器的冻结状态和有限的重传次数. 通过对该Markov链模型稳定状态的求解并结合M/M/1/K排队模型，导出了DCF系统性能的理论模型. 仿真结果表明，该理论模型能够精确地预测广义IEEE 802.11 DCF协议的系统性能.

关键词: 无线局域网, IEEE 802.11, 分布式协调功能, Markov链模型

Abstract: This paper proposes an improved two-dimensional Markov chain model for the performance analysis of the IEEE 802.11 DCF protocol. The model is applicable to both saturated and unsaturated traffic conditions. Moreover, it extends the existing models to take into account previously-ignored MAC layer factors such as backoff freezing and limited times of retry. In addition, by deriving the stationary state of the Markov model and considering an M/M/1/K queuing model, we further derive a theoretical model for evaluating performance of the general IEEE 802.11 DCF protocols. Accuracy of the proposed theoretical model is validated with simulation results.

Key words: wireless local area network, IEEE 802.11, distributed coordination function, Markov chain model

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