@inproceedings{86bf4b29496f4a5ebb0e7309a7aed65c,
title = "Offline downloading in China: A comparative study",
abstract = "Although Internet access has become more ubiquitous in recent years, most users in China still suffer from low-quality connections, especially when downloading large files. To address this issue, hundreds of millions of China's users have resorted to technologies that allow for {"}offline downloading{"}, where a proxy is employed to pre-download the user's requested file and then deliver the file at her convenience. In this paper, we examine two typical implementations of offline downloading: the cloud-based approach and the smart AP (access point) based approach. Using a large-scale dataset collected from a major cloud-based system and comprehensive benchmarks of popular smart APs, we find that the two approaches are complementary while also being subject to distinct performance bottlenecks. Driven by these results, we design and implement a proof-of-concept middleware called ODR (Offline Downloading Redirector) to help users get rid of performance bottlenecks. We feel that offline downloading has broad applicability to other areas of the world that lack broadband penetration. By deploying offline downloading technologies, coupled with our proposed ODR middleware, the Internet experiences for users in many parts of the world can be improved.",
keywords = "Cloud storage, DTN, Internet, Offline downloading, Smart AP",
author = "Zhenhua Li and Christo Wilson and Tianyin Xu and Yao Liu and Zhen Lu and Yinlong Wang",
note = "Funding Information: This work is supported by the High-Tech Research and Development Program of China ({"}863-China Cloud{"} Major Program) under grant 2015AA01A201, the China NSF under grant 61471217, the US NSF under grant CNS-1319019, the China Postdoctoral Science Fund under grant 2014M550735, and the CCF-Tencent Open Fund under grant AGR20150201. We would like to thank our shepherd Vyas Sekar and the Tencent Xuanfeng team for their valuable help. Publisher Copyright: {\textcopyright} 2015 ACM.; ACM Internet Measurement Conference, IMC 2015 ; Conference date: 28-10-2015 Through 30-10-2015",
year = "2015",
month = oct,
day = "28",
doi = "10.1145/2815675.2815688",
language = "English (US)",
series = "Proceedings of the ACM SIGCOMM Internet Measurement Conference, IMC",
publisher = "Association for Computing Machinery",
pages = "473--486",
booktitle = "IMC 2015 - Proceedings of the 2015 ACM Internet Measurement Conference",
address = "United States",
}