End-to-end delay analysis and admission control in 802.11 DCF WLANs
End-to-end delay analysis and admission control in 802.11 DCF WLANs
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DOI：
10.1016/j.comcom.2005.08.006
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发表时间：
2006-04
期刊：
影响因子：
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通讯作者：
A. Banchs;P. Serrano;A. Azcorra
中科院分区：
文献类型：
--
作者：
A. Banchs;P. Serrano;A. Azcorra
在本文中，我们首先提出一个分析模型来研究饱和条件下 802.11 DCF WLAN 中回退延迟的分布。我们表明，通过我们的方法，可以准确有效地计算退避延迟低于给定阈值的概率。然后，我们扩展退避延迟分布模型来分析端到端延迟，并基于此分析提出一种准入控制算法。该算法在语音站和数据站的混合环境中进行了评估，仿真结果证实该算法有效地为语音站提供了端到端的时延保证。该算法还根据计算成本进行了评估，并显示对于运行时使用来说足够高效。
In this paper, we first present an analytical model to study the distribution of the backoff delay in an 802.11 DCF WLAN under saturation conditions. We show that, with our method, the probability that the backoff delay is below a given threshold can be computed accurately and efficiently. Then, we extend our backoff delay distribution model to analyze the end-to-end delay, and propose an admission control algorithm based on this analysis. The proposed algorithm is evaluated in a mixed environment with voice and data stations, and simulation results confirm that it effectively provides voice stations with end-to-end delay guarantees. The algorithm is also evaluated in terms of computational cost and shown to be efficient enough for run-time usage.