摘要
服务组合可以将网络上多种异构服务重新组合,形成新的业务.本文在流媒体应用中,采用三层服务组合架构,通过检测用户点播行为的改变,触发流媒体服务组合自适应调整,以最小化用户整体点播延迟为目标,在保证用户QoS的同时,最大化利用服务器现有的资源,从而扩充服务器服务能力,降低用户点播的拒绝率.试验仿真结果表明流媒体服务集群系统性能得到了大幅度的提高.
Services composition can be a variety of heterogeneous network services will be reorganize to form a new business.This paper discusses the service composition in the streaming media application.A three layers model is adopted to describe the service composition in streaming media system.The algorithm tests the user demand behavioral change to minimize the delay of all user demand.Streaming media service composition adjusts user paths of services,which will expanding the server Service ability to maximize use of existing server resources,reduce the refuse rates and ensuring the QoS of user.The simulation results show that the proposed method of service composition largely improves the performance of the streaming media system.
出处
《小型微型计算机系统》
CSCD
北大核心
2010年第9期1702-1706,共5页
Journal of Chinese Computer Systems
基金
国家自然科学基金项目(60774038)资助
国家"八六三"高技术研究发展计划项目(2008AA01A317)资助
国家"八六三"计划项目(2008AA01A318)资助
关键词
服务组合
用户行为
服务迁移
流媒体服务
多业务系统
service composition
user behavior
service migrate
media streaming service
multi-service system