Session-Based Cloud Video Delivery Networks in Mobile Internet
Session-Based Cloud Video Delivery Networks in Mobile Internet
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DOI：
10.6138/jit.2017.18.7.20161128
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发表时间：
2017-12
影响因子：
1.6
通讯作者：
Dianjie Lu;Bin Hu;Xiangwei Zheng;Hong Liu;Guijuan Zhang
中科院分区：
文献类型：
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作者：
Dianjie Lu;Bin Hu;Xiangwei Zheng;Hong Liu;Guijuan Zhang
云视频交付网络（C-VDN）最近受到了相当大的关注。与传统的视频交付网络不同，C-VDN可以提供可扩展的资源，而无需投资基础设施部署。然而，由于移动的用户和视频的动态特性，现有的C-VDN策略不能很好地应用于移动的Internet。此外，云资源约束下的代理站点选择和交付路径构建是另一个具有挑战性的问题。本文提出了基于会话的云视频传输网络框架来解决这些问题。该框架考虑了移动的用户的移动性和视频的变化，分别采用图扩展和会话构造。此外，我们制定的协调替代网站的选择和交付路线建设作为一个混合整数规划。由于这是一个非确定性多项式时间问题，我们放松了整数约束，并设计了一个启发式算法来获得最优解。仿真实验表明，我们提出的算法是有效的性能和租金成本。
Cloud video delivery networks (C-VDNs) have been receiving considerable attention recently. Different from traditional video delivery networks, C-VDNs can provide scalable resources without the need to invest on infrastructure deployment. However, current C-VDN strategies cannot be readily applied to mobile Internet because of the dynamic characteristics of mobile users and videos. Moreover, dealing with the surrogate site selection and delivery path building under cloud resource constraints is another challenging problem. We propose the session-based cloud video delivery network framework to solve these problems. This framework considers the mobility of mobile users and the changing of videos by employing graph extension and session construction, respectively. Furthermore, we formulate the coordination of surrogate site selection and delivery route building as a mixed integer program. We relax the integer constraints and design a heuristic algorithm to obtain the optimal solution because this is a nondeterministic-polynomial time problem. Simulation experiments show that our proposed algorithm is efficient in terms of both performance and rental cost.