Internet Traffic and Capacity Evaluation in UMTS Downlink

UMTS can be connected to data networks. So Internet traffic services such as WWW browsing, email, ftp, SMTP should be handled by UMTS. Each of the traffic services have some specific properties but all of them include a basic ON/OFF model. For a traffic service there is some unused (OFF) times between their transmitted packets which we may use them for other services. In this paper based on the offered traffic services and models presented in 3GPP we calculate ON and OFF time durations of the above traffic services then calculate their activity factors. Finally we survey their impacts on the UMTS capacity and users.