组播应用模式及受控组播

组播是相对于传统的单播和广播而言的一种IP网络数据传输方式。因为组播能够有效地节约网络带宽、降低网络负载,所以组播广泛应用于实时数据传输、视频会议、远程教育和互联网直播等方面。介绍了组播的基本原理以及组播的三种应用模式:点对多点、多点对点、多点对多点;为了使组播业务适应电信级的可运营、可管理的要求,着重提出了受控组播应如何解决组播在信源管理、用户管理和组播安全控制三方面存在的问题。

Multicast Application Mode and Controlled Multicast

As the traditional unicast and broad cast,Multicast is also a kind of data transfer mode of IP network.Because multicast can save bandwidth,reduce network load,multicast is widely u sed on real time data transfer,video conferencing,dis-tance education and internet living broadcast .This paper introduces th e basic principle and three kinds of application modes of multicast:spot to multi -spot,multi -spot to spot,multi -spot to multi -spot.In order to make multicast business meet the demand of telecom business,this pap er points out that how to resolve reso urce management,user management an d security con-trol for controlled multicast.