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A comparative simulation study of rate adaptation algorithms in wireless LANs

机译：无线局域网速率适配算法的比较仿真研究

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摘要

Wireless channel condition varies quickly and unpredictably, which is the main reason leading to the low performance of 802.11 wireless local area networks. One effective way to overcome the above problem is rate adaptation, which adaptively selects an appropriate transmission rate according to current channel conditions. A number of rate adaptation algorithms have been proposed in the literatures. However, few of them have been thoroughly evaluated by simulations. It is necessary to conduct a comparative study of these rate adaptation mechanisms, to have a comprehensive view about their impacts on the performance of applications in different channel conditions. In this paper, we perform an extensive comparative simulation study on several well-known rate adaptation algorithms based on ns-3. We quantify their performance for aggregate network throughput in the following two environments: collision-concerned and mobility-concerned. This work is an important step to understand the behaviour of different rate adaptation algorithms.
机译：无线信道状况变化迅速且无法预测，这是导致802.11无线局域网性能低下的主要原因。克服上述问题的一种有效方法是速率适配，其根据当前信道条件自适应地选择合适的传输速率。文献中已经提出了许多速率自适应算法。但是，其中很少有通过模拟进行全面评估的。有必要对这些速率适应机制进行比较研究，以全面了解它们对不同信道条件下应用性能的影响。在本文中，我们对几种基于ns-3的著名速率自适应算法进行了广泛的比较仿真研究。我们在以下两个环境中针对总网络吞吐量量化其性能：冲突相关和移动性。这项工作是了解不同速率自适应算法行为的重要一步。

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