Investigating Transparent Web Proxies in Cellular Networks
Investigating Transparent Web Proxies in Cellular Networks
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DOI：
10.1007/978-3-319-15509-8_20
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发表时间：
2015-03
期刊：
影响因子：
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通讯作者：
Xing Xu;Yurong Jiang;Tobias Flach;Ethan Katz-Bassett;D. Choffnes;R. Govindan
中科院分区：
文献类型：
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作者：
Xing Xu;Yurong Jiang;Tobias Flach;Ethan Katz-Bassett;D. Choffnes;R. Govindan
人们越来越多地使用移动的设备作为他们访问互联网的主要手段。虽然众所周知，蜂窝网络运营商使用中间盒，但他们的行为细节及其对Web性能的影响却知之甚少。本文提出了一个分析代理的行为和透明的Web代理如何与HTTP流量在四个主要的美国手机运营商。我们发现，所有四个运营商都使用这些代理来访问HTTP流量，但它们在是否执行对象缓存，流量重定向，图像压缩和连接重用方面有所不同。例如，一些透明代理单方面降低图像质量，这提高了对象获取时间，但可能会损害用户满意度。我们还发现，这些代理不一定提高性能的移动的Web工作负载的对象提取时间，即，我们观察到显着的好处，只有当流量大小是大的，服务器和代理之间的路径表现出大的延迟和/或损失。
People increasingly use mobile devices as their primary means to access the Internet. While it is well known that cellular network operators employ middleboxes, the details of their behavior and their impact on Web performance are poorly understood. This paper presents an analysis of proxy behavior and how transparent Web proxies interact with HTTP traffic in four major US cell carriers. We find that all four carriers use these proxies to interpose on HTTP traffic, but they vary in terms of whether they perform object caching, traffic redirection, image compression, and connection reuse. For example, some transparent proxies unilaterally lower the quality of images, which improves object fetch time but may hurt user satisfaction. We also find that these proxies do not necessarily enhance performance for mobile Web workloads in terms of object fetch times; namely, we observe noticeable benefits only when flow sizes are large and the path between the server and proxy exhibits large latency and/or loss.