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提出了一种基于主动网络的视频分级传输方案(SVM-AN).服务器、客户端以及部署在网络中间的主动节点构建了分级多播结构,原始视频流在服务器端进行分级压缩与标记,客户端根据自身网络情况和处理能力申请合适的视频流,中间主动节点利用其处理能力过滤掉优先级较低的部分视频流,以满足异构网络用户对视频质量的不同需要.与接收端驱动的分层多播(RLM)方案的对比仿真结果表明:SVM-AN方案提供更稳定的带宽、端到端时延以及更小的分组丢失率,为接收端提供稳定的视频回放质量,也提高了网络的总体利用效率.
(SVM-AN) is proposed based on active network.The server, client and active nodes deployed in the network construct a hierarchical multicast structure, the original video stream is compressed and marked hierarchically on the server side, and the client End according to its own network conditions and processing capacity to apply for a suitable video stream, the middle of the active node using its processing power to filter out the lower priority video stream to meet the different needs of heterogeneous network users video quality with the receiver-driven The simulation results of hierarchical multicast (RLM) scheme show that the SVM-AN scheme provides more stable bandwidth, end-to-end delay and smaller packet loss rate, which provides the receiving end with stable video playback quality and improves The overall efficiency of the network.