摘要
会话启动协议研究工作组提出3种协议功能扩展方式:方法扩展、头部扩展和消息体扩展。文章深入探讨了包含这3种扩展方法的事件通告机制,给出了基于这一机制的自动回叫业务实例,并讨论了该机制的安全性。
IETF SIPPING (Session Initiation Protocol Investigation) working group has propo sed 3 approaches to extend the base functions of SIP: method extension, header e xtension and body extension. The article goes deeply into the SIP event notifica tion mechanism involving these three approaches. An example is given to illustra te the automatic 'call-back' service based on this mechanism. Considerations on the security of the mechanism are also included.
出处
《中兴通讯技术》
2003年第5期40-43,共4页
ZTE Technology Journal
