Abstract: This paper researches the technology and architecture of the real-time stream media transport in IP WAN, and quality control measure of media streams. A multi-layer transport architecture facing WWW is set up with agents in each transport note. Agents can be derived or canceled or changed in media streams system. In order to achieve the goal of transport stream media’s quality control, transport agents estimate the information of congestion in itself subnet, report the information to higher notes, and control the rate of media streams transport as well as accomplish media streams transport.

Key words: Wide area network (WAN), Stream media, Transport quality, Layered control

摘要： 研究了在广域IP网上实时传送媒体流的体系技术及传输中媒体流的质量控制措施，面向全网建立多层转发体系，在每个转发节点设置转发代理。系统对代理可实现派生、撤消或更换。转发代理完成对应媒体流的及时转发任务，实现对所在网络分支的拥塞状况自动检测、自动向上级节点报告、自动控制转发流的大小，达到对转发媒体流的质量控制。

关键词: 广域网, 流媒体, 传输质量, 分层控制

CLC Number: 

• TP393.2