【摘要】 从IP网络多媒体组播协议体系结构出发,在网络协议、传输协议和应用协议方面,讨论组播协议的特点、功能和实现方法。在传输层讨论RTP/RTCP协议的设计原则,以适用于IP上的视频会议;在应用层讨论设计组播服务器时相关的协议及产品;在网络层由实现了IGMP的路由器组成Mbone,组播用户通过IGMP加入组播组,以达到合理利用网络带宽.并给出实例。组播技术还在继续发展,IGMP协议的V3版IGMPV3在路由器的层次上提供了对源路由组播的支持。更多还原

【Abstract】 To analyze the multimedia multicast protocols from the system structure in the application protocols, transport protocols , network protocols, this paper discussed their features , functions and realization methods. In the transport layer, discussed the design principles in the RTP/RTCP for the video meeting on IP network. In the application layer, discussed the productions and protocols in point of multicast server designing . Mbone is made up of the routers by supporting IGMP in the network layer. Multicast users can join the group for using network bandwidth in reason and are given an example. IGMPV3 supported root routing multicast in the routers in the developing multicast technology .更多还原