I 上海交通大学工程硕士研究生学位论文 Abstract Along with the development munication, all users wish to communicate with others at every moment and in everywhere. Different users need different delay time and loss rate. work should provide different quality of service to different users. How to resolve this problem in the 3rd generation mobile system is an important issue. According to the research in the 3rd generation mobile system and the model of quality of service the research work mentioned in the paper is mainly about: 1. The research on Web QoS work QoS. Concepts, classification, protocols and key technology of Web QoS work QoS are presented; Integrated Services and Differentiated Services on TCP/work are studied in details. 2. The design of QoS-aware 3rd generation mobile system packet switched work. The technologies and system architechure of Differentiated Services QoS are analyzed in details. bine DiffServ and 3rd generation mobile packet system, DiffServ-based packet work is designed on the base of mobile work; the popular queue algorithms and queue