【摘要】 <正> 1 概述多媒体和现代网络技术的发展使流媒体应用(如视频会议、远程教育、视频点播等)成为下一代Internet服务的一个重要分支。流媒体传输持续时间长,并且用户对流媒体对象的访问往往呈现在特定黄金时段内,请求集中于少数热门对象,采用简单的多单播实现途径,一方面使得共享链路上可能存在多个复制数据报文,造成系统资源浪费并很快耗尽网络资更多还原

【Abstract】 The multicast of Streaming Media over the Internet is an important component of many current and future Internet applications. The heterogeneity and lacking of QoS guarantee make the application of this technique a challenge. In this paper, we analyze the difficulties in streaming media multicast design, survey technologies that have been proposed for it. We also discuss several congestion control and error control mechanisms. Finally we present some remained issues for further research.更多还原