基于IMS的移动多媒体广播时移系统信令设计  

Signaling Design of IMS-based Time-shifting System for Mobile Multimedia Broadcast

作　　者：肖琳[1,2] 杨群[1,2] 曾学文[2] 王劲林[2] 

机构地区：[1]中国科学院研究生院,北京100039 [2]中国科学院声学所国家网络新媒体工程技术研究中心,北京100080

出　　处：《计算机工程》2009年第4期1-3,共3页Computer Engineering

基　　金：国家“863”计划基金资助项目“支持三重业务的地面电视无线回传关键技术与双向化方案研究”(2007AA01Z230)

摘　　要：提出一种基于IMS的移动多媒体广播时移系统架构,该架构融合广播网络和无线移动通信网络,为移动多媒体广播提供时移服务,实现服务与接入无关。设计基于SIP的时移信令流程来完成对时移业务的支撑。利用排队论方法对时移请求信令延迟进行理论分析,结果表明信令延迟能够满足实时性需求,证明该系统是完全可行的。This paper presents an IP Multimedia Subsystem（IMS）-based time-shifting system architecture for mobile multimedia broadcast. The architecture integrates broadcast network and wireless mobile communications network to provide time-shifting service for mobile multimedia broadcast, which achieves access independence. The Session Initialize Protocol（SIP）-based signaling flow is applied to support time-shifting service. This paper conducts a theoretical analysis of time-shifting signaling delay based on queuing theory. The results show that the signaling delay is acceptable according to the real-time requirements and proves that the system is feasible.

关 键 词：移动多媒体广播 时移系统 IP多媒体子系统 会话初始协议 延迟 

分 类 号：TN919.85[电子电信—通信与信息系统]