OpenFlow网络下SVC视频的多路径传输  

Multi-path Transmission of SVC Video in Open Flow Network

作　　者：柳寻 杨恩众 曾祥迟 杨坚[1] 

机构地区：[1]中国科学技术大学信息科学技术学院,合肥230027

出　　处：《计算机工程》2016年第7期77-81,共5页Computer Engineering

基　　金：国家自然科学基金资助面上项目"基于在线测量的网络化媒体服务系统自适应优化与控制"(61174062)

摘　　要：在单路通信方式下传输视频时,若传输路径上存在拥塞链路,视频传输将会受到很大影响。针对该问题,在Open Flow环境下设计一个可伸缩视频多路径传输系统。该系统包括Open Flow交换机、媒体服务器和控制器3个部分。媒体服务器发送可伸缩视频数据,网络控制器根据Edmonds-Karp算法得到每层视频流的路径,生成并下发流表至Open Flow交换机,完成数据转发,实现多路径传输。实验结果表明,与单路径传输相比,多路径传输可实现整个网络的负载均衡,有效降低可伸缩视频传输过程中的丢包率。Video transmission will be greatly affected if congestion link exists on the transmission path in single-path communication. This paper designs a multi-path transmission system of scalable video to solve the problem in OpenFlow network. The system consists of OpenFlow switch,media server and controller. Media server sends scalable video data. Controller acquires the path of each video streaming according to Edmonds-Karp algorithm,and generates and sends flow tables to OpenFlow switch. Then data forwarding and multi-path transmission are completed. Experimental results indicate that multi-path transmission can balance the loads of all network links and effectively reduce the packet loss rate of scalable video transmission compared with single-path transmission.

关 键 词：多路径 可伸缩视频编码 负载均衡 软件定义网络 丢包率 

分 类 号：TP37[自动化与计算机技术—计算机系统结构]