Fast-Start Video Delivery in Future Internet Architectures with Intra-domain Caching
Fast-Start Video Delivery in Future Internet Architectures with Intra-domain Caching
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DOI：
10.1007/s11036-016-0694-8
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发表时间：
2016-03
影响因子：
3.8
通讯作者：
Zhi Liu;M. Dong;Bo Gu;Cheng Zhang;Yusheng Ji;Y. Tanaka
中科院分区：
文献类型：
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作者：
Zhi Liu;M. Dong;Bo Gu;Cheng Zhang;Yusheng Ji;Y. Tanaka
当前基于TCP/IP的网络正遭受IP的巨大使用。最近，内容中心网络（CCN）被提出作为未来网络架构的替代方案。在CCN中，经过身份验证和保护的数据本身是一个名称，可以在网络级别直接请求，而不是使用IP和DNS。此外，CCN中的路由器具有缓存能力。如果内容已经存储在路由器中，则最终用户可以从路由器而不是远程服务器获取数据，从而通过减少传输跳数来提高整体网络性能。视频在网络中扮演着越来越重要的角色，在网络流量中占据主导地位。每个视频请求的响应时间极大地影响了用户体验质量（QoE），如果用户在视频播放之前等待很长时间，甚至可能放弃所请求的视频服务。因此，如何在CCN中提供快速启动的视频交付至关重要。在本文中，我们的目标是为用户提供快速启动的视频交付在CCN。具体来说，我们设计了一个新的缓存策略，在拓扑感知CCN的流行感知视频缓存。我们建议使用可伸缩视频编码（SVC）的视频编码的快速启动视频传输和缓存每个视频层分别按照设计的缓存策略。给定用户分配的权重，等待时间和接收视频质量之间的权衡进行了研究。仿真结果表明，该方案在典型场景下的性能明显优于现有方案。
Current TCP/IP based network is suffering from the tremendous usage of IP. Recently,content centric network(CCN) is proposed as an alternative of the future network architecture. In CCN, data itself, which is authenticated and secured, is a name and can be directly requested at the network level instead of using IP and DNS. Moreover, routers in CCN have caching abilities. Then end users can obtain the data from routers instead of remote server if the content has been stored in the routers, thus the overall network performance could be improved by reducing the transmission hops. Orthogonally, video plays a more and more important role nowadays and dominates the network traffic. Response time of each video request greatly affects thequality of user experience(QoE), users may even abandon the requested video service if they have to wait for long time before the video playback. Hence how to provide fast-start video delivery in CCN is critical. In this paper, we target to provide users fast-start video delivery in CCN. Specifically, we design a new caching policy for popularity-aware video caching in topology-aware CCN. And we propose to encode the video usingscalable video coding(SVC) for fast-start video delivery and cache each video layer separately following the designed caching policies. Given an assigned weight by users, the tradeoff between the waiting time and received video quality is studied. Simulations are conducted to verify the performances and the results show that the proposed scheme outperforms state-of-the-art schemes significantly in typical scenarios.