面向网格的时移电视系统研究  

Grid-enabled Time-shifted TV Service Architecture

作　　者：向伟[1] 吴刚[1] 李俊[1] 

机构地区：[1]中国科学技术大学自动化系,安徽合肥230027

出　　处：《小型微型计算机系统》2007年第10期1740-1745,共6页Journal of Chinese Computer Systems

基　　金：国家"八六三"重大专项基金项目(2005AA103320)资助;新世纪优秀人才支持计划项目(NCET-04-0564)资助;安徽省优秀青年科技基金项目(04042046)资助.

摘　　要：基于网格技术提出了时移电视服务系统(GridTVOD,Time-shifted TV on demand based on grid).在GridTVOD系统中,系统组织基于Globus MDS,将视频服务器和服务节点组织为流媒体服务网格,视频数据传输采用P2P和Patching相结合,用户作为网格节点,在享受服务时,也作为服务端为其它节点提供服务.整个系统具有如下特点:1)采用流合并机制,有效地减少媒体服务器提供的基流数;2)采用分布式控制协议,系统具有良好的可扩展性;3)利用网格技术,为系统组织提供安全、有效的保障.A time-shifted TV service architecture based on grid was presented. In GridTVOD, media servers and service nodes composed a streaming media service grid, which was designed on the base of Globus MDS. The GridTVOD used a peer-to-peer approach to cooperatively stream video using patching techniques, in which each peer can serve as both a client and a mini-video server. It has the following properties：l）it utilizes a streaming combining mechanism to reduce the number of base streams in media server ;2） it utilizes a distributed control protocol in a scalable way ; 3）it utilized grid technologies to provide a secure and efficient guarantee for the organization of service.

关 键 词：服务网格 视频点播 补丁技术 对等网络 

分 类 号：TP37[自动化与计算机技术—计算机系统结构]