摘要： 介绍了一个基于组播的网络频道系统的基本框架,以及此框架的优点。由于目前的主干网还不支Cool-Channels持组播,因此在系统中使用了隧道技术。文章详细介绍了系统中隧道的具体实现,包括隧道的建立、撤Cool-Channels销、维持以及多级隧道的概念和实现。还讨论了系统开发过程中遇到的一些问题及其解决方法。结果表明,这种组播和隧道相结合结构的系统具有较好的规模可扩展性,适合目前的网络状况。

关键词: IP组播, 网络多媒体, 网络频道, 隧道

Abstract: This paper introduces a multicast-based Internet channel system framework, Cool-Channels, and its advantage. Many networks do not support multicast now,so tunnel technique is used in Cool-Channels system. The paper discusses in detail about the implementation of tunnels, including the establishment, cancellation, keeping alive of tunnels, and the concept and implementation of multilevel tunnels. Several problems encountered in the development and their resolutions are also discussed. The result shows that this framework has better scalability, and is suitable to current network circumstances.

中图分类号: 

• TP393.03