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IEEE80211无线网络中DCF模式媒介服务状态分析

DOI: 10.13190/jbupt.201104.101.147, PP. 101-104

Keywords: 无线局域网,分布式协调功能,服务状态,隐藏节点

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Abstract:

IEEE80211标准的分布式协调功能(DCF)模式下,节点通过竞争获得无线媒介的访问权,导致媒介服务时间远大于数据帧传输时间.通过深入分析数据帧传输、数据帧碰撞以及媒介空闲3种媒介状态的转换情况,采用近似二项分布建立媒介状态描述模型,获得了媒介服务时间估计值.仿真结果表明,所建立的模型能够准确地衡量给定网络状态下的媒介服务时间.

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