IEEE 802.11a DCF协议吞吐量与时延性能分析

doi:10.13190/jbupt.201006.43.gaof

北京邮电大学学报 ›› 2010, Vol. 33 ›› Issue (6): 43-47.doi: 10.13190/jbupt.201006.43.gaof

IEEE 802.11a DCF协议吞吐量与时延性能分析

高峰,高泽华,文柳,张兵,徐大雄

光通信与光电子学教育部重点实验室（北京邮电大学），北京 100876

收稿日期:2010-01-28 修回日期:2010-03-23 出版日期:2010-12-28 发布日期:2011-01-07
通讯作者: 高峰 E-mail:gfbupt@sina.com

Performance Analysis of WLAN Based on IEEE 802.11a

Received:2010-01-28 Revised:2010-03-23 Online:2010-12-28 Published:2011-01-07
Contact: Feng GAO E-mail:gfbupt@sina.com

摘要/Abstract

摘要：

为了准确评估IEEE 80211a系统性能，指导同层规划工作，提出了改进二维Markov模型. 从成帧效率和分布式协调功能（DCF）协议效率2个方面对IEEE 802.11a 无线局域网（WLAN）的性能进行分析，得出饱和条件下系统归一化吞吐率和平均分组时延，并以此为基础，给出了不同节点数条件下，基本接入模式和请求发送/确认发送（RTS/CTS）模式切换门限值，使网络性能达到最优.

关键词: IEEE 802.11a, 分布式协调功能, 马尔可夫, 请求发送/确认发送门限

Abstract:

To improve the accuracy of evaluation on IEEE 802.11a data service supporting capacity and guide network planning work, a modified twodimensional Markov chain model of the backoff window scheme is proposed. By analyzing the IEEE 802.11a wireless local area network (WLAN) system performance in the aspect of framing efficiency and distributed coordination function (DCF) efficiency, the normalized system throughput and average packet delay under the condition of saturation are found. On the basis of that, the handoff thresholds for basic access mode and request to send/clear to send (RTS/CTS) mode for diverse number of nodes are given, thus the system performance is optimized.

Key words: IEEE 802.11a, distributed coordination function, Markov, request to send/clear to send threshold

中图分类号:

TN925.93

高峰,高泽华,文柳,张兵,徐大雄. IEEE 802.11a DCF协议吞吐量与时延性能分析[J]. 北京邮电大学学报, 2010, 33(6): 43-47.

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IEEE 802.11a DCF协议吞吐量与时延性能分析

Performance Analysis of WLAN Based on IEEE 802.11a

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