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IEEE802.11 DCF退避机制分析和改进 被引量：6

Analysis and Improvement of the Backoff Mechanism Used in IEEE 802.11 DCF
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摘要 引入二维马尔科夫模型,对退避时隙选择概率分布对IEEE802.11DCF系统性能的影响进行了理论分析,并提出了一种简单有效的退避时隙选择改进方案.仿真结果证明,该方案能够有效提高IEEE802.11的饱和吞吐量. IEEE802.11 is the most popular WLAN standard based on CSMA/CA. The primary Medium Access Control （MAC） protocol of IEEE802.11 is the contention-based distributed coordination function （DCF） which adopts uniform distribution for backoff process. In this paper, a Markov model is introduced to analyze the impact of backoff time distribution on system performance of IEEE802.11 DCF. A simple and effective mechanism for backoff time distribution is then proposed. Simulation results show that this mechanism can effectively improve saturation throughput.
作者 陈羽中
机构地区 中国科学技术大学信息处理中心
出处 《应用科学学报》 CAS CSCD 北大核心 2006年第1期10-14,共5页 Journal of Applied Sciences
基金 国家"863"高技术研究发展计划(2002AA783043)资助项目 中国科学院知识创新工程(cxjj-91)
关键词 分布协调功能 退避时隙选择概率分布 饱和吞吐量 distributed coordination function backoff time distribution saturation throughput
分类号 TP393.1 [自动化与计算机技术—计算机应用技术]
  • 相关文献

参考文献6

  • 1IEEE Std 802.11-1997, IEEE 802.11 wireless LAN medium access control (MAC) and physical layer (PHY) specifications[S].
  • 2Bianchi G. Performance analysis of the IEEE802. 11 distributed coordination function [ J ]. IEEE JSAC, 2000, 18(3) : 535 - 547.
  • 3Ni Qiang. Modeling and analysis of slow CW decrease for IEEE802.11 WLAN. Processdings of IEEE PIMRC 2003[C] .Beijing, China, 2003. 2: 1717- 1721.
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  • 5Cali F, Conti M. IEEE 802. 11 protocol: Design and performance evaluation of an adaptive backoff mechanism [J].IEEE JSAC, 2000, 18(9) :1774 - 1786.
  • 6李云,隆克平,吴诗其,陈前斌.IEEE802.11 DCF性能分析及改进[J].电子学报,2003,31(10):1446-1451. 被引量：10

二级参考文献10

  • 1IEEE Std.802.11. Wireless LAN Medium Access Control and Physical Layer Specifications[S]. 1999 Edition.
  • 2IEEE Std.802. 11a.Wireless LAN Medium Access Control and Physical Layer Specifications High-Speed Physical Layer in the 5 GHz Band[S]. 1999 Edition.
  • 3IEEE Draft 802. 11b/D8.0. Wireless LAN Medium Access Control and physical Layer Specifications: Higher Speed Physical Layer(PHY) Extension in the 2.4GHz band[S] .Sept.2001.
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共引文献9

同被引文献25

引证文献6

二级引证文献7

应用科学学报
2006年 第1期

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