Computer Engineering and Applications ›› 2012, Vol. 48 ›› Issue (3): 99-101.

• 网络、通信、安全 • Previous Articles     Next Articles

Novel model for IEEE80.11 DCF performance analysis on unsaturated traffic

WANG Weiting1, XIAO Jinsheng2, XIE Honggang2   

  1. 1.The Jintan Municipal Office of State Administration of Taxation, Jintan,Jiangsu 213200, China
    2.School of Electronic Information, Wuhan University, Wuhan 430072, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2012-01-21 Published:2012-01-21

一种新的IEEE80.11 DCF有限负载性能分析模型


  1. 1.江苏省金坛市国家税务局信息中心,江苏 金坛 213200
    2.武汉大学 电子信息学院,武汉 430072

Abstract: A performance model based on closed queuing network is established to evaluate the performance of IEEE 802.11 MAC based on the Distributed Coordination Function(DCF) under the condition of unsaturated traffic, which utilizes carrier sense multiple access with collision avoidance(CSMA/CA). The principle of operation and the applicability of the queue networks model is described. The impact of both the number of terminals, traffic load and package size on the performance are analyzed. The expression of throughput and transmission probability under unsaturated traffic load is derived by employing the queuing model. Simulation results show that the model can evaluate the performance of DCF effectively.

Key words: Distributed Coordination Funtion(DCF), backoff process, queue networks, unsaturated throughput, performance evaluation

摘要: IEEE802.11的MAC协议采用基于CSMA/CA的DCF机制,针对该协议的非饱和性能理论评估问题,为DCF机制建立一个闭合排队网络模型。基于该排队模型推导出有限负载条件下无线网络传输率与吞吐量的表达式,并通过该模型理论分析了站点数量、传输负载、数据包大小对网络性能的影响。通过实验仿真结果与模型分析数据对比,验证了该模型能够有效地分析DCF机制的非饱和传输性能。

关键词: DCF机制, 退避过程, 排队网络, 非饱和吞吐量, 性能评估