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应用科学学报 ›› 2006, Vol. 24 ›› Issue (2): 165-170.

• 论文 • 上一篇    下一篇

IEEE802.11a WLAN中DCF性能分析

陈羽中, 杨丙卿, 开彩红, 刘政凯   

  1. 中国科学技术大学信息处理中心, 安徽合肥 230026
  • 收稿日期:2005-01-05 修回日期:2005-03-14 出版日期:2006-03-31 发布日期:2006-03-31
  • 作者简介:陈羽中,博士生,研究方向:无线局域网,Email:yzchen@mail.ustc.edu.cn;刘政凯,教授,博导,研究方向:图像处理与多媒体通信,E-mail:zhengkai@ustc.edu.cn
  • 基金资助:
    中国科学院知识创新工程(cxjj-91);国家"863"高技术研究发展计划资助项目(2002AA783043)

Saturation Throughput and Delay Analysis of DCF in IEEE 802.11a WLAN

CHEN Yu-zhong, YANG Bing-qing, KAI Cai-hong, LIU Zheng-kai   

  1. Information Processing Center, University of Science and Technology of China, Hefei 230026, China
  • Received:2005-01-05 Revised:2005-03-14 Online:2006-03-31 Published:2006-03-31

PDF

74

被引次数

5

摘要： 引入二维马尔科夫模型,对DCF的两种传输方式:基本接入方式和RTS/CTS方式,在IEEE802.11a WLAN中的饱和吞吐量和传输时延性能进行了理论分析和仿真,理论分析和仿真结果表明,与低速IEEE802.11WLAN中的情况相反,在IEEE802.11a WLAN中,基本接入方式在多数情况下比RTS/CTS方式更有效.

关键词: DCF, IEEE802.11a, 饱和吞吐量, 传输时延

Abstract: IEEE 802.11a is a popular high-speed WLAN standard with a data rate up to 54 Mps.The basic Medium Access Control (MAC) protocol of IEEE 802.11a is the contention-based distributed coordination function.DCF includes two access mechanisms:basic access mechanism and RTS/CTS access mechanism.In this paper, an analysis and comparison of saturation throughput and access delay of these two access mechanisms in IEEE 802.11a WLAN is conducted by introducing a two-dimensional Markov model.The study reveals that, in contradiction to the situation in IEEE 802.11 WLAN, basic access mechanism is always more effective than RTS/CTS mechanism in high-speed IEEE 802.11a WLAN.

Key words: IEEE802.11a, saturation throughput, access delay, DCF

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