移动环境下的QoS保证技术  

Technology Providing QoS Guarantees under Mobile Environments

作　　者：黄奎[1] 孙利民[1] 吴志美[1] 

机构地区：[1]中国科学院软件研究所,北京100080

出　　处：《计算机科学》2002年第9期91-93,79,共4页Computer Science

基　　金：863计划课题(编号:2001AA112050); 中国科学院软件研资所基础研究课题(编号:CXK15348)

摘　　要：1 引言 各种Internet业务在全世界范围内的广泛应用推动了Internet技术的发展,IP协议原有的"尽力发送"机制已经不能很好地适应业务的需求,因此,IETF提出了资源预留协议和实时传输协议等来保证传输业务流的服务质量.同时,越来越多的移动用户要求能够连续无缝地接入Internet,为此I-ETF设计了移动IP协议以满足移动用户的需求.Providing QoS(Quality of Service) guarantees under mobile environments is the key to widespread application of mobile computing. Firstly,this paper summarizes the mechanism that provides QoS guarantees applied in fixed network,then discusses the effects on QoS of mobile environment and the problems whether Mobile QoS protocols are compatible with existing protocols such as Mobile IP. Secondly, existing technologies providing mobile QoS guarantees , especially Mobile Resource Reservation Protocol, are introduced, and the trend of research on mobile QoS guarantees is pointed out.Finally, we put forward a QoS framework supporting mobile multicast based on hierarchical structure of mobile agents.

关 键 词：服务质量 INTERNET 移动环境 QOS 通信链路质量 数据流 计算机网络 

分 类 号：TP393.4[自动化与计算机技术—计算机应用技术]