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首页> 外文期刊>IEEE Transactions on Broadcasting >Evaluation of Background Push Content Download Services to Mobile Devices Over DVB Networks
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Evaluation of Background Push Content Download Services to Mobile Devices Over DVB Networks

机译：评估DVB网络上向移动设备的后台推送内容下载服务

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摘要

This paper proposes a multicast content download service based on the use of residual network capacity to push multimedia content to available local storage in personal multimedia devices. The service under study is based on the FLUTE protocol. Specifically, FLUTE packets fill the spare capacity in the IP tunnels reserved for the primary streaming service (opportunistic insertion). The paper also evaluates the use of application layer–forward error correction (AL-FEC) parity to overcome transmission errors, object multiplexing to send the most popular multimedia contents more frequently and cache management policies that consider user preferences to keep in storage the most useful items. The service has been evaluated through simulations and measurements performed with an application prototype based on the DVB-H standards. The results show that AL-FEC enables the use of residual capacity for background content download services. In turn, AL-FEC, as well as object multiplexing, improves the relation between the number of content items and the overall access time. Moreover, results show that high percentages of requests can be served from the local cache of the service, provided that it is possible to estimate the popularity of content items and the user preferences.
机译：本文提出了一种基于剩余网络容量的组播内容下载服务，以将多媒体内容推送到个人多媒体设备中的可用本地存储中。研究中的服务基于FLUTE协议。具体来说，FLUTE数据包填充了预留给主要流服务的IP隧道中的备用容量（机会插入）。本文还评估了使用应用层前向纠错（AL-FEC）奇偶校验来克服传输错误，对象多路复用以更频繁地发送最受欢迎的多媒体内容以及考虑用户偏好以保持存储最有效的缓存管理策略。项目。通过使用基于DVB-H标准的应用程序原型进行的仿真和测量对服务进行了评估。结果表明，AL-FEC可以将剩余容量用于后台内容下载服务。反过来，AL-FEC以及对象多路复用可改善内容项数与总体访问时间之间的关系。此外，结果表明，只要可以估计内容项的受欢迎程度和用户偏好，就可以从服务的本地缓存中满足较高百分比的请求。

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