基于IMS的E2E QOS控制机制  

An E2E QOS Control Mechanism Based on IMS

作　　者：林晖[1] 万晓榆[1] 樊自甫[1] 

机构地区：[1]重庆邮电学院下一代网络应用技术研究所

出　　处：《微计算机信息》2007年第3期37-39,共3页Control & Automation

基　　金：重庆市教委科学技术研究项目(KJ050512;KJ050513/KJ060514);重庆市科委自然科学基金项目(CSTC2005BB2054);重庆邮电学院青年教师基金项目(A2005-26)

摘　　要：3GPP提出的IMS用于提供各种实时多媒体业务,未来的实时多媒体服务将以视频、音频以及视频、音频的混合为主,对于实时性和延迟的要求很高,需要E2E的QOS的支持。文章分析了现有的IMS的QOS机制的实现以及存在的不足,提出了一种新的基于策略的E2EQOS机制。新的机制主要实现了IMS中的各个层次间的相互协作、SIP协议的扩展和PDF功能的改进,实现了对多媒体业务实时性的提高并且缩短了延迟。The IMS provides services for any type of IP communication whether it is voice or video telephony, video streaming, instant and multimedia messaging, multimedia gaming or virtual-realily. It is obvious that creating end-to-end QOS in heterogeneous wire-less-wired IMS networks in which the access to the IP core network can be accomplished via different kinds of access networks with different technologies is essential for supporting real time application and requiring end-to-end QOS support. This paper presents some fault aspects of provisioning QOS in the IMS environment.We also have defined new functionalities and some extension to the existing SIP signalling to resolve some of the existing problems existing in IMS that don't let end-to-end QOS control between dif-ferent technologies and domains.

关 键 词：SIP 基于策略 端到端服务质量 IP多媒体子系统 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]