Watching television over an IP network
Watching television over an IP network
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DOI：
10.1145/1452520.1452529
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发表时间：
2008-10
期刊：
影响因子：
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通讯作者：
M. Cha;P. Rodriguez;J. Crowcroft;S. Moon;X. Amatriain
中科院分区：
文献类型：
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作者：
M. Cha;P. Rodriguez;J. Crowcroft;S. Moon;X. Amatriain
半个世纪以来，电视一直是一种占主导地位、无处不在的大众媒体，推动了许多技术进步。尽管它的广泛使用和对新兴应用的重要性，但人们并不完全理解根深蒂固的电视观看习惯。这主要是因为难以在个别家庭大规模安装监测设备。最近互联网电视(IPTV)的蓬勃发展使我们能够监控整个网络的用户行为和网络使用情况。这样的分析可以为人们如何观看电视，以及底层网络和系统如何更好地适应未来的挑战提供更清晰的图景。在本文中，我们首次基于世界上最大的IPTV系统之一的网络跟踪对IPTV工作负载进行了分析。我们的数据集捕获了250,000个家庭在六个月内的渠道变更活动。我们描述了观看会话的属性、频道受欢迎程度动态、地理位置和频道切换行为。我们讨论了我们的发现对网络和系统的影响，包括对快速频道更改所需的支持。我们对运行中的IPTV系统的数据分析不仅对现有和未来的IPTV系统具有重要影响，而且对在更广泛的互联网上分发电视的开放式互联网电视分发系统的设计也具有重要意义，例如Joost和BBC的iPlayer。
For half a century, television has been a dominant and pervasive mass media, driving many technological advances. Despite its widespread usage and importance to emerging applications, the ingrained TV viewing habits are not completely understood. This was primarily due to the difficulty of instrumenting monitoring devices at individual homes at a large scale. The recent boom of Internet TV (IPTV) has enabled us to monitor the user behavior and network usage of an entire network. Such analysis can provide a clearer picture of how people watch TV and how the underlying networks and systems can better adapt to future challenges. In this paper, we present the first analysis of IPTV workloads based on network traces from one of the world's largest IPTV systems. Our dataset captures the channel change activities of 250,000 households over a six month period. We characterize the properties of viewing sessions, channel popularity dynamics, geographical locality, and channel switching behaviors. We discuss implications of our findings on networks and systems, including the support needed for fast channel changes. Our data analysis of an operational IPTV system has important implications on not only existing and future IPTV systems, but also the design of the open Internet TV distribution systems such as Joost and BBC's iPlayer that distribute television on the wider Internet.