ABSTRACT
The third generation of mobile communication technology is developed rapidly, its indexes of various fields are being perfected constantly, QoS is an important index of the communication system, it determines users' satisfaction. The systematic requisition for QoS of the third generation of mobile communication of survey in the article, QoS structure of UMTS network and QoS which bear the weight of the business of every component are realized, the rank , classification of QoS of the mobile communication system, parameter and attribute of QoS. Among them, and bear the weight of in the business in QoS structure, UTRAN introducing UMTS while making up emphatically and key network, and their QoS deals with the mechanism; In the classification of QoS , have described the mutual function of kind and attribute of various fields emphatically. Have also introduced an important component of the systematic service quality of the third generation of mobile communication in addition - -Wireless resource management, its systematic service quality for guaranteeing , get the cover area of planning and offer the systematic capacity to have important guarantee function ; To wireless resource management, we controlled, switched over, admitted controlling , load controlling , horse's resource allocation, divided into groups in the power separately the inserting machine respect has carried on more exhaustive argumentation.And introduces a new algorithm :synthesis call admission algorithm(S-CAC);A new technology:high speed downlink packet access(HSDPA).
Key words: the thirdgeneration mobile communicationsystem，QoS ，UMTS ， wireless resource management
