摘要
系统介绍了会话初始协议SIP,同时与H.323协议进行比较并分析其优势,以集中式多媒体会议体系结构为基本模型,介绍组成会议的基本元素中心节点Focus、混合器MIXER、会议策略服务器、会议通告服务等。在此基础上进一步细化会议流程,分析各会议元素的基本功能,描述会议的发起、加入、注销等控制过程,设计了视频会议系统模型。
In this article,Session Initiation Protocol（SIP） was introduced,and compared with H.323 Protocol,and its advantage was analyzed.With centralized video conference system as model,the basic elements,such as ＂Focus＂,＂Mixer＂,＂Conference Policy Server（CPS）＂,＂Conference Notification Service（CNS）＂ etc were introduced.The conference control process was described in detail,as well as the function of every elements and the control process such as initiation and joining.
出处
《农业网络信息》
2010年第12期31-33,共3页
Agriculture Network Information
基金
校企合作项目"信息安全综合告警系统研究"(编号20070411-17)
关键词
SIP
集中控制
视频会议
模型
SIP（Session Initiation Protocol）
centralized
video conference system
model
