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首页> 外文会议>2019 10th International Conference on Dependable Systems, Services and Technologies >Experimental Evaluation of Performance Anomaly in Mixed Data Rate IEEE802.11ac Wireless Networks
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Experimental Evaluation of Performance Anomaly in Mixed Data Rate IEEE802.11ac Wireless Networks

机译：混合数据速率IEEE802.11ac无线网络中性能异常的实验评估

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摘要

IEEE 802.11 wireless local area networks (WLANs) are shared networks, which use contention-based distributed coordination function (DCF) to share access to wireless medium. The performance of DCF mechanism depends on the network load, number of wireless nodes and their data rates. The throughput unfairness also known as performance anomaly is inherent in the very nature of mixed-data rate Wi-Fi networks. This unfairness exhibits itself through the fact that slow clients consume more airtime to transfer a given amount of data, leaving less airtime for fast clients. In this paper, we evaluate the performance anomaly of mixed rate wireless networks and present the results of practical experiments benchmarking throughput of a mixed rate 802.11ac wireless network. These results clearly show that even the most recent wireless standard still suffers from the airtime consumption unfairness. At the end of the paper we analyse related works offering possible solutions and discuss our approach to evade performance degradation in mixed data rate Wi-Fi environments.
机译：IEEE 802.11无线局域网（WLAN）是共享网络，它们使用基于竞争的分布式协调功能（DCF）共享对无线介质的访问。 DCF机制的性能取决于网络负载，无线节点数及其数据速率。吞吐量不公平（也称为性能异常）是混合数据速率Wi-Fi网络的本质所固有的。这种不公平表现在以下事实上：缓慢的客户端会花费更多的通话时间来传输给定数量的数据，而对于快速的客户端则会保留较少的通话时间。在本文中，我们评估了混合速率无线网络的性能异常，并提出了对混合速率802.11ac无线网络的吞吐量进行基准测试的实际实验结果。这些结果清楚地表明，即使是最新的无线标准仍然遭受通话时间消耗不公平的困扰。在本文的最后，我们分析了提供可能解决方案的相关工作，并讨论了在混合数据速率Wi-Fi环境中避免性能下降的方法。

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