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基于G/G/1排队模型的802.11 DCF延迟分析 被引量：4

Delay Analysis of 802.11 DCF Based on G/G/1 Queuing Model
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摘要 针对现有802.11 DCF分析模型在进行退避机制分析时不考虑周围节点状态的不足,提出了一种非饱和情况下IEEE 802.11 DCF协议的性能分析方法,推导出了以802.11 DCF为媒体访问控制(MAC)层协议的单跳无线网络中,MAC层的分组延迟及其抖动表达式,并分析了不同分组到达速率、节点数和退避窗口大小对MAC层分组冲突概率、延迟及其抖动的影响.仿真结果表明:MAC层的分组冲突概率、延迟及其抖动随着分组到达速率、节点数的增加而增加;以冲突概率的增加为代价,减小最小退避窗口可以减小MAC层的分组延迟及其抖动. As the existing models analyzing the back-off scheme in 802. 11 DCF can not effectively consider the neighbor nodes, this paper proposes a new approach to the performance analysis of unsaturated 802.11 DCF protocol, deduces the formulae of the MAC （Medium Access Control） layer delay and its delay in unsaturated single-hop 802.11 DCF network, and analyzes the effects of packet arrival rate, node number and collision window size on the MAC-layer transmission collision probability, the delay and the delay jitter. Simulated results indicate that the transmission collision probability, the delay and the delay jitter all increase with the packet arrival rate and the node number, and that the delay and the delay jitter both decrease with the minimum collision window size of DCF, following by an increase in the transmission collision probability.
作者 谢丽英 王洪江 韦岗
机构地区 华南理工大学电子与信息学院
出处 《华南理工大学学报（自然科学版）》 EI CAS CSCD 北大核心 2010年第1期49-53,58,共6页 Journal of South China University of Technology(Natural Science Edition)
基金 国家杰出青年科学基金资助项目(60625101) 国家"863"计划项目(2007AA01Z210) 广东省自然科学基金资助项目(07006488)
关键词 排队网络 分布式协调功能 延迟 延迟抖动 queuing network Distributed Coordination Function delay delay jitter
分类号 TP393.17 [自动化与计算机技术—计算机应用技术]
  • 相关文献

参考文献10

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二级参考文献12

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共引文献4

同被引文献45

  • 1吕娜,徐德民,邹向毅.一种无线Ad hoc网络MAC协议优化算法[J].计算机应用研究,2009,26(3):1026-1028. 被引量：3
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  • 6LI Jian, ZENG Xian-wen, SU Qing-gang. Performance investigation of backoff algorithms in multihop wireless networks[C]//Proc of the 9th International Conference for Young Computer Scientist. Washington DC:IEEE Computer Society, 2008:564-569.
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  • 8KWAK B J, SONG N O, MILLER L E. Performance analysis of exponential backoff[J].IEEE/ACM Trans on Networking, 2005, 13(2):343-355.
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引证文献4

二级引证文献2

华南理工大学学报（自然科学版）
2010年 第1期

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