Throughput Modeling of Differentiation Schemes for IEEE 802.11e MAC Protocol
Throughput Modeling of Differentiation Schemes for IEEE 802.11e MAC Protocol
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DOI：
10.1109/vtcfall.2012.6399249
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发表时间：
2012-12
期刊：
影响因子：
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通讯作者：
F. Peng;K. Shafiee;Victor C. M. Leung
中科院分区：
文献类型：
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作者：
F. Peng;K. Shafiee;Victor C. M. Leung
最近对IEEE802.11e服务质量（QoS）感知增强分布式协调功能（EDCA）的分析需要很大程度的复杂性，这使得很难将其应用于评估EDCA支持的服务差异化机制的广泛参数设置，包括争用窗口（CW）和仲裁帧间空间（AIFS）机制。在本文中，我们提出了一个改进的分析模型，用于分析AIFS和CW分化方案下EDCA的吞吐量。将问题分解为两个易于求解的马尔可夫链，并用数值方法联合求解，从而简化了模型。我们在广泛的系统参数范围内提供仿真和分析结果，以证明所提出模型的准确性。该模型实现简单，可用于一般配置环境下的EDCA评价。研究结果有助于在802.11e增强型分布式信道访问中合理设计参数，以实现特定应用所需的QoS支持。
Most recent analyses on IEEE802.11e quality of service (QoS)-aware enhanced distributed coordination function (EDCA) require a large degree of complexity, making it difficult to apply them to a wide range of parameter settings for the evaluation of service differentiation mechanisms supported in EDCA, including the Contention Window (CW) and Arbitration Inter-Frame Space (AIFS) mechanisms. In this paper, we propose an improved analytical model to analyze the throughput of EDCA with AIFS and CW differentiation schemes. The model is simplified by decomposing the problem into two easily solved Markov chains that can jointly be solved by numerical method. We present simulation and analytical results over a broad range of system parameters to demonstrate the accuracy of the proposed model. The model is simple to implement and can be applied to general configuration circumstances for the evaluation of EDCA. The results are valuable to facilitate proper design of parameters in 802.11e enhanced distributed channel access for the QoS support required by specific applications.