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arXiv 1708.04078cs.NIcs.DCcs.MM
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uStash:一种改进公交用户QoE的新型移动内容分发系统

uStash: a Novel Mobile Content Delivery System for Improving User QoE in Public Transport

Fang-Zhou Jiang, Kanchana Thilakarathna, Sirine Mrabet, Mohamed Ali Kaafar, Aruna Seneviratne

摘要:

移动数据流量呈指数级增长,并且当用户“在移动中”(例如在公共交通工具中)时高效地分发内容甚至更具挑战性。尽管在全球范围内正在成为普遍做法,但在通勤时使用移动设备访问内容(例如视频)既昂贵又不可靠。利用内容流行度和用户的不同网络连接的空间和时间相关性,我们提出了一种新的内容分发系统,\textit{uStash},它保证了更好的QoE关于访问延迟和使用成本。所提出的协作下载和内容存储方案为uStash提供商提供了通过蜂窝网络控制内容访问成本的灵活性。我们在概率框架中对uStash系统进行建模,从而分析得出协作下载的最佳部分。然后,我们使用现实生活中的跟踪驱动的模拟验证所提出的模型。特别是,我们使用来自6条不同路线上运行的22辆城际公交车和移动VoD服务提供商的数据集来表明,与通过用户的蜂窝网络连接下载的内容相比,uStash将每月蜂窝数据的成本降低了约50%,内容访问的预期延迟降低了60%。

英文摘要:

Mobile data traffic is growing exponentially and it is even more challenging to distribute content efficiently while users are "on the move" such as in public transport.The use of mobile devices for accessing content (e.g. videos) while commuting are both expensive and unreliable, although it is becoming common practice worldwide. Leveraging on the spatial and temporal correlation of content popularity and users' diverse network connectivity, we propose a novel content distribution system, \textit{uStash}, which guarantees better QoE with regards to access delays and cost of usage. The proposed collaborative download and content stashing schemes provide the uStash provider the flexibility to control the cost of content access via cellular networks. We model the uStash system in a probabilistic framework and thereby analytically derive the optimal portions for collaborative downloading. Then, we validate the proposed models using real-life trace driven simulations. In particular, we use dataset from 22 inter-city buses running on 6 different routes and from a mobile VoD service provider to show that uStash reduces the cost of monthly cellular data by approximately 50\% and the expected delay for content access by 60\% compared to content downloaded via users' cellular network connections.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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