Virtual Speed Test: an AP Tool for Passive Analysis of Wireless LANs
Virtual Speed Test: an AP Tool for Passive Analysis of Wireless LANs
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DOI：
10.1109/infocom.2019.8737598
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发表时间：
2019-04
期刊：
影响因子：
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通讯作者：
Peshal B. Nayak;S. Pandey;E. Knightly
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文献类型：
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作者：
Peshal B. Nayak;S. Pandey;E. Knightly
互联网速度测试通过测量10 MB的TCP上传和下载吞吐量来评估端到端网络性能。虽然此类测试提供了有关网络运行状况的有价值的见解，但它们对网络管理员用处不大，因为(1)结果仅在执行测试的客户端上可用，(2)测试可能使网络饱和，从而增加负载并降低其他客户端的性能。在本文中，我们提出了虚拟速度测试，这是一个基于测量的框架，使AP能够估计其关联的任何客户端的速度测试结果，而不需要任何特殊目的的探测，没有最终用户的合作，并且纯粹基于AP处的被动可观察参数。我们使用商用硬件实施了虚拟速度测试，将其部署在办公室和住宅环境中，并在不同网络负载和通道条件下进行了跨越多天的测量。总体而言，与地面真实速度测试相比，虚拟速度测试的平均估计误差不到6%，但开销为零，结果可在AP获得。
Internet speed tests assess end-to-end network performance by measuring throughput for 10s of MB of TCP uploads and downloads. While such tests provide valuable insights into network health, they are of little use to network administrators since (1) the results are only available on the client that performs the test and (2) the tests can saturate the network, increasing load and worsening performance for other clients. In this paper, we present virtual speed test, a measurement based framework that enables an AP to estimate speed test results for any of its associated clients without any special-purpose probing, with zero end-user co-operation and purely based on passively observable parameters at the AP. We implemented virtual speed test using commodity hardware, deployed it in office and residential environments, and conducted measurements spanning multiple days having different network loads and channel conditions. Overall, virtual speed test has mean estimation error less than 6% compared to ground truth speed tests, yet with zero overhead, and outcomes available at the AP.