Efficient and Transparent Wi-Fi Offloading for HTTP(S) POSTs
Efficient and Transparent Wi-Fi Offloading for HTTP(S) POSTs
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DOI：
10.1109/tmc.2015.2442237
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发表时间：
2016-04
影响因子：
7.9
通讯作者：
Kévin Huguenin;E. L. Merrer;Nicolas Le Scouarnec;G. Straub
中科院分区：
文献类型：
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作者：
Kévin Huguenin;E. L. Merrer;Nicolas Le Scouarnec;G. Straub
随着在线（社交）分享、协作和备份平台的出现，移动用户产生了越来越多的数字数据，如文档、照片和视频，他们在移动中上传这些数据。蜂窝互联网连接（例如，3G/4G）使移动用户能够上传他们的数据，但会耗尽他们设备的电池并使移动服务提供商过载。Wi-Fi数据卸载克服了上述延迟容忍数据的问题。然而，这是以限制用户的移动性为代价的，因为在上传数据时，他们需要呆在给定的区域内。接入点的宽带连接的上行链路通常构成瓶颈，并导致长达数十分钟的等待时间。在本文中，我们提倡利用位于Wi-Fi接入点LAN上的常用设备的存储能力，通常是住宅网关，NAS单元或机顶盒，以减少等待时间。我们提出了Hoop，一个将上传任务卸载到此类设备上的系统。Hoop在http(s) post上无缝运行，这使得它具有高度通用性和广泛适用性；它还需要对网关和web服务器进行有限的更改，而不需要对现有的协议或浏览器进行更改。Hoop是安全的，在典型的设置中，可将等待时间减少多达46倍。我们分析了Hoop的安全性，并通过将用户的移动轨迹与依赖于主要国家isp的领先社区网络（即FON）的Wi-Fi接入点的位置相关联来评估其性能。我们表明，在实践中，与常规的Wi-Fi数据卸载相比，Hoop大大减少了照片拍摄和上传时间之间的延迟。我们还通过在无线路由器上实现Hoop来演示它的实用性。
With the emergence of online platforms for (social) sharing, collaboration and backing up, mobile users generate ever-increasing amounts of digital data, such as documents, photos, and videos, which they upload while on the go. Cellular Internet connectivity (e.g., 3G/4G) enables mobile users to upload their data but drains the battery of their devices and overloads mobile service providers. Wi-Fi data offloading overcomes the aforementioned issues for delay-tolerant data. However, it comes at the cost of constrained mobility for users, as they are required to stay within a given area while the data is uploaded. The up-link of the broadband connection of the access point often constitutes a bottleneck and incurs waiting times of up to tens of minutes. In this paper, we advocate the exploitation of the storage capabilities of common devices located on the Wi-Fi access point's LAN, typically residential gateways, NAS units or set-top boxes, to decrease the waiting time. We propose Hoop, a system for offloading upload tasks onto such devices. Hoop operates seamlessly on http(s) post , which makes it highly generic and widely applicable; it also requires limited changes on the gateways and on the web servers and none to existing protocols or browsers. Hoop is secure and, in a typical setting, reduces the waiting time by up to a factor of 46. We analyze the security of Hoop and evaluate its performance by correlating mobility traces of users with the position of the Wi-Fi access points of a leading community network (i.e., FON) that relies on major national ISPs. We show that, in practice, Hoop drastically decreases the delay between the time the photo is taken and the time it is uploaded, compared to regular Wi-Fi data offloading. We also demonstrate the practicality of Hoop by implementing it on a wireless router.