摘要
文中介绍了ＩＰ组播的概念、Ｄ类ＩＰ地址以及ＩＰ组播的加入、退出，阐述了ＩＰ组播的路由两种路由表的构成以及各自的特点，讨论了ＩＰ组播的范围，对ＩＰ组播安全机制作了比较详细的描述，介绍了ＩＰ组播密钥管理，以及组播站点如何获得密钥并用它来进行ＩＰ安全组播．然后就ＩＰ组播的可靠传输进行了讨论，比较了ＩＰ组播的优缺点；然后介绍了ＩＰ组播的一种应用——Ｉｎｔｅｒｎｅｔ上的视频广播，详细说明了Ｉｎｔｅｒｎｅｔ上的视频广播网络的构成。
First introduced in the paper here is the concept of IP multicast and D class IP addresses. It is shown how an IP workstation can join and leave a multicast group, and maintain its membership in the multicast group. Routing in multicast is also different from that in unicast. The paper gives the forms of two different routing trees, and shows the differences of these trees. Then it shows the scope of IP multicast. Securities in multicast are discussed in detail. The paper also describes how the security keys are managed, how a workstation gets a key for secure multicast, and how the key is used in data transmission. Reliable data transmission in multicast is discussed too. The second part of the paper gives an example of using IP multicast\|IP TV. The architecture of IP TV is outlined, four kinds of workstations in IP TV are shown, and then its quality of service is discussed.
出处
《计算机研究与发展》
EI
CSCD
北大核心
1999年第10期1226-1231,共6页
Journal of Computer Research and Development
基金
国家"九五"攻关项目基金
关键词
组播
视频广播
INTERNET网
IP协议
多媒体
multicast, class D address, TV broadcast, key administration, reliable transmission
