Performance Assessment of IEEE 802.11e EDCF Using Three-dimension Markov Chain Model

Performance Assessment of IEEE 802.11e EDCF Using Three-dimension Markov Chain Model
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发表时间：
2008
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通讯作者：
I. Hwang;Hsin-Hao Chang
I. Hwang;Hsin-Hao Chang
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其他
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作者：
I. Hwang;Hsin-Hao Chang

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新标准IEEE 802.11e被指定为支持无线局域网(WLAN)的服务质量。目前有关增强型分布式信道接入(EDCA)性能的研究仅限于竞争窗口(CW)，而忽略了仲裁帧间间隔(AIF)和重试限制的影响。基于三维马尔可夫链模型，提出了饱和条件下EDCA机制的AIFS操作、竞争窗口大小和重试限值区分的分析模型。该分析模型提供了对EDCA协议的深入理解和洞察，并通过大量的数值和仿真结果研究了不同参数对系统性能的影响。
The new standard IEEE 802.11e is specified to support quality-ofservice in wireless local area networks (WLAN). Recent research related to the Enhanced distributed channel access (EDCA) performance is only analyzed on the contention window (CW), but ignore the effect of arbitration inter-frame spaces (AIFS) and retry limits. This paper aims at providing an analytical model that captures the operation of the AIFSs, contention window sizes and retry limits differentiation for the EDCA mechanism under saturation condition based on a three-dimension Markov Chain model. The analytical model provides an in-depth understanding and insights into the EDCA protocol, and effectiveness of different parameters on the system performance is investigated through extensive numerical and simulation results.