An Optimization Framework for QoS-Enabled Adaptive Video Streaming Over OpenFlow Networks
An Optimization Framework for QoS-Enabled Adaptive Video Streaming Over OpenFlow Networks
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DOI：
10.1109/tmm.2012.2232645
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发表时间：
2013-04
影响因子：
7.3
通讯作者：
Hilmi E. Egilmez;S. Civanlar;A. Tekalp
中科院分区：
文献类型：
--
作者：
Hilmi E. Egilmez;S. Civanlar;A. Tekalp
OpenFlow是一种可编程网络协议和相关硬件，旨在通过解耦路由的控制和转发层来有效地管理和引导流量。本文提出了一种分析框架，在控制层的转发决策的优化，使动态服务质量（QoS）在OpenFlow网络，并讨论了该框架的应用程序的QoS使能流的可伸缩编码的视频与两个QoS水平。我们提出并解决优化的动态QoS路由作为一个约束的最短路径问题，在这里，我们对待可伸缩编码视频的基础层作为一个级别-1的QoS流，而增强层可以被视为级别-2的QoS或尽力而为流。我们提供的实验结果表明，所提出的动态QoS框架实现了显着的改善，在各种编码配置和网络拥塞的情况下，可伸缩编码视频流的整体质量。
OpenFlow is a programmable network protocol and associated hardware designed to effectively manage and direct traffic by decoupling control and forwarding layers of routing. This paper presents an analytical framework for optimization of forwarding decisions at the control layer to enable dynamic Quality of Service (QoS) over OpenFlow networks and discusses application of this framework to QoS-enabled streaming of scalable encoded videos with two QoS levels. We pose and solve optimization of dynamic QoS routing as a constrained shortest path problem, where we treat the base layer of scalable encoded video as a level-1 QoS flow, while the enhancement layers can be treated as level-2 QoS or best-effort flows. We provide experimental results which show that the proposed dynamic QoS framework achieves significant improvement in overall quality of streaming of scalable encoded videos under various coding configurations and network congestion scenarios.