Internet区分服务及其几个热点问题的研究

Differentiated Services in the Internet: A Survey

综述了 Ｉｎｔｅｒｎｅｔ在区分服务（Ｄｉｆｆｅｒｅｎｔｉａｔｅｄ ｓｅｒｖｉｃｅｓ， Ｄｉｆｆｓｅｒｖ）研究方面的一些最新的工作，分析了 Ｄｉｆｆ－ｓｅｒｖ的体系结构、Ｄｉｆｆｓｅｒｖ的典型服务与技术，并着重论述了 Ｉｎｔｅｒｎｅｔ Ｄｉｆｆｓｅｒｖ所面临的问题，包括Ｄｉｆｆｓｅｒｙ与综合服务（Ｉｎｔｅｇｒａｔｅｄ ｓｅｒｖｉｃｅｓ， Ｉｎｔｓｅｒｖ）相结合的端到端服务质量（ＱｏＳ）提供机制、Ｄｉｆｆｓｅｒｖ网络中的组播（ｍｕｌｔｉｃａｓｔ）问题和Ｄｉｆｆｓｅｒｖ中带宽分配的公平性问题，及其进一步的研究方向。

This is a review paper on recent works about differentiated services (Diffserv) of Internet. A summary of the technologies considered in the literatures is presented. This paper mainly focuses on such research topics as the Diffserv architecture for the internet, the typical services and technologies of Diffserv, end--to-end QoS provisioning mechanism combining Diffserv and integrated services (Intserv), IP multicast in Diffserv networks, and the fairness considerations on bandwidth allocation in Diffserv networks. Research directions and open problems in this area are also discussed.