基于组播的多点会议及其SIP扩展研究  

Research of Multicast-based Multipoint Conference and Its SIP Extension

作　　者：景运瑜[1] 万晓榆[1] 樊自甫[1] 

机构地区：[1]重庆邮电大学下一代网络应用技术研究所,重庆400065

出　　处：《计算机工程》2007年第22期140-141,154,共3页Computer Engineering

基　　金：重庆市科委自然科学基金资助项目(CSTC2005BB2054);重庆市教委科学技术研究基金资助项目(KJ050512;KJ050513;KJ060514);重庆邮电大学青年教师基金资助项目(A2005-26)

摘　　要：Internet草案对于如何扩展SIP作了规定,在对多媒体会议的支持方面,通常都通过SIP的扩展来实现,但这些扩展采用单个会议成员服务器来保存会议成员状态,限制了会议系统的可控制性。该文主要针对该局限性,通过结合多媒体多点会议的组播模型,提出了一种支持多点会议的SIP协议扩展方法,并就该方法在保持会议成员一致性方面做了研究。Tbe Internet draft stipulates how SIP can be extended. SIP extension is often used to support multimedia conference. But such extension adopts a single conference member server to conserve the state that the conference member has, which restricts the controllability of conference system. Due to the shortage, by combining the multicast model of multimedia multipoint conference, this paper suggests a SIP extension method to support a multipoint conference, and studies the consistency of conference member.

关 键 词：会话初始化协议 多点会议 MCSIP 用户代理 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]