摘要
SIP协议是IETF提出的在IP网络上进行多媒体通信的应用层控制协议,本文通过SIP协议的背景、功能、网络元素、消息格式、视频会议中的信令控制、媒体能力协商、软交换通信机制、以及会话安全机制等几个方面进行研究分析,提出一种基于集中式多媒体会议架构下的终端设计方案,并对该SIP终端在集中式视频会议中的核心工作部分——会话过程、媒体能力协商和安全机制做概要性研究。
SIP is the IETF proposed protocol at IP network for multimedia communication＇s application layer control protocol. This article researches and analyses the background, functions, network elements, message formats, video conference signaling in the control of the media capacity of consultations, as well as softswitch communications mechanisms of SIP protocol. A centralized multimedia conference architecture design of terminals is provided, and general research is done for the core of the SIP terminal in centralized video conference the conversation process, the ability of media arrangement, and the security mechanisms.
出处
《西安邮电学院学报》
2009年第5期125-130,共6页
Journal of Xi'an Institute of Posts and Telecommunications
