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计算机工程 ›› 2010, Vol. 36 ›› Issue (13): 122-124. doi: 10.3969/j.issn.1000-3428.2010.13.043

• 网络与通信 • 上一篇    下一篇

支持多类型业务的受限负载EDCA性能分析

鲁 冬1,朱容波2   

  1. (1. 河南职业技术学院信息工程系,郑州 450046;2. 中南民族大学计算机科学学院,武汉 430074)
  • 出版日期:2010-07-05 发布日期:2010-07-05
  • 作者简介:鲁 冬(1977-),男,讲师、硕士,主研方向:无线局域网,分布式信道接入;朱容波,博士、副教授
  • 基金资助:
    国家自然科学基金资助项目(60902053);湖北省自然科学基金资助项目(2008CDB339)

Performance Analysis of Finite Load EDCA Supporting Multi-class Traffic

LU Dong1, ZHU Rong-bo2   

  1. (1. Department of Information Engineering, Henan Vocational and Technical College, Zhengzhou 450046; 2. College of Computer Science, South-Central University for Nationalities, Wuhan 430074)
  • Online:2010-07-05 Published:2010-07-05

摘要: 无线局域网增强的分布式信道接入(EDCA)具有支持多类型业务的功能。为准确有效地分析EDCA机制的性能,提出一个考虑多类型业务的受限负载二维马尔可夫性能分析模型。该模型通过引入空闲、后回退等状态来精确刻画饱和与非饱和负载下系统的性能,并考虑EDCA重传次数、后碰撞过程等特征。仿真结果验证了模型的有效性,系统的最大吞吐量出现在非饱和负载情况下。

关键词: 性能模型, 增强的分布式信道访问, 无线局域网

Abstract: Enhanced Distributed Channel Access(EDCA) of Wireless Local Area Network(WLAN) can support multi-class traffic. In order to reveal the essence of EDCA mechanism, a bi-dimensional Markov model is proposed to depict the EDCA scheme under finite load. The proposed model employs idle and post backoff states to deduce the channel throughput under both unsaturation case and saturation case, which also considers all characteristics of IEEE 802.11e EDCA, including the retransmissions, post-collision process. Simulation results show the accuracy of the proposed model. The results also reveal that the maximum throughput is achieved at the unsaturation case.

Key words: performance model, Enhanced Distributed Channel Access(EDCA), Wireless Local Area Network(WLAN)

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