CGC:一种移动多媒体延迟优化分发策略  

CGC: a Delay-optimized Distribution Strategy for Mobile Multimedia

作　　者：刘然[1] 肖来东[1] 袁小群[1] 喻莉[1] 朱光喜[1] 

机构地区：[1]华中科技大学电子与信息工程系,武汉430074

出　　处：《小型微型计算机系统》2012年第12期2561-2565,共5页Journal of Chinese Computer Systems

基　　金：国家自然科学基金项目(60802009)资助;"十一五"国家重大专项(2009ZX03003-003;2010ZX03003-001)资助

摘　　要：近年来,随着移动互联网的普及,移动多媒体应用得到了巨大的发展.然而,由于移动通信网络结构的特殊性及运营控制策略等因素,传统互联网的多媒体分发技术在移动互联网环境下不能产生预期效果.提出一种新的移动多媒体内容分发体系架构,在普通的GGSN上增加了智能缓存,使移动用户可以就近获取多媒体服务.在此基础上,提出一种新颖的协作式GGSN智能缓存策略,GGSN智能缓存之间协同工作,在满足自身服务资源约束的条件下,最小化用户获取多媒体服务的延迟.实验结果表明:该策略不仅能有效降低多媒体服务延迟,还能很好地适应于用户的移动性.In recent years, with the popularization of mobile Internet, mobile multimedia applications have developed greatly. Howev- er, because of the particularity of mobile communication network structure and operation control strategy of the particularity of factors such as the Internet, multimedia delivery technologies on traditional Internet and are not well suited for mobile Interact environment. To this end, this paper puts forward a new mobile multimedia delivery architecture, and add smart cache to the ordinary GGSN, so that mobile users could be served by near-by GGSNs. On this basis, this paper also proposes a novel cooperative GGSN-SC caching strategy, in which GGSN-SCs collaborate with each other and minimize multimedia services retrieving delay of mobile users while meeting their own resource constraint conditions. Simulation results show that this strategy can effectively reduce the latency of multi- media services t and are well adapted to the user＇s mobility.

关 键 词：移动互联网 多媒体 协作式缓存 拉格朗日松弛 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]