随着 Internet的迅猛发展 ,多媒体应用种类和数量的增加 ,网上电子商务活动的开展 ,Internet上的服务质量(Qo S,Quality of Service)问题已越来越受到重视 .本文综述了 Internet上 Qo S研究工作的一些最新进展 ,这些工作从网络的不同层次上给予了 Qo S的支持 ,协同合作提供 End- To- End的 Qo S.最后讨论了该领域的当前研究热点及进一步研究方向 . With the rapid development of the Internet, the increase of types and quantities of multimedia applications, the development of online e-commerce activities, and the problem of quality of service (QoS) over the Internet, more and more attention has been paid to .In this paper, Some recent developments in research work have been supported by Qo S at different levels of the network and collaborated to provide End-To-End Qo S. Finally, the current research hotspots and further research directions in this field are discussed.