基于覆盖组播网络的实时视频传输方案的设计  

Design of Overlay Multicast Network for Real-time Video Stream in Mine

作　　者：程德强[1] 钱建生[1] 田隽[1] 

机构地区：[1]中国矿业大学信息与电气工程学院,徐州221008

出　　处：《电信科学》2006年第8期63-67,共5页Telecommunications Science

基　　金：国家自然科学基金资助项目(No.70533050);中国矿业大学青年科研基金资助项目(No.F200423)

摘　　要：本文设计了一种基于覆盖组播网络的流媒体传输系统,通过在网络中部署数据流转发中间服务器(intermediateserver,IMS),构建一层覆盖组播网络,实现流媒体的应用层组播,提高数据传输效率,减少数据网络冗余;同时通过度和延时受限的路由算法,均衡网络流量;根据视频编码的特点,在应用层进行网络过滤,自适应调节视频发送码率,避免了网络阻塞,保证了流媒体的可靠传输。本系统部署简单,通过现场测试,达到了较好的效果。Transmitting real-time video streams on the current network of a coal mine is easy to cause network congestion, which has become a obstacle to develop video monitoring systems in mine. In this paper, an overlay muhicast network to transmit video stream is proposed. By the allocation of distributed intermediate server, an overlay network is constructed, which can improve the data-transmitting efficiency, and minimize the redundant packets in the network. By the use of degree-bounded and relay-bounded routing algorithm, the network is balanced. Also, according to the characteristics of video encoding, a network filter is designed to adjust the bit rate of transmitting video to avoid the network congestion and guarantee the reliable transmission of video stream. The system can be implemented easily, and performs a good performance in practice.

关 键 词：视频流媒体 覆盖网络 组播 矿区 

分 类 号：TP393[自动化与计算机技术—计算机应用技术] TP393.4[自动化与计算机技术—计算机科学与技术]