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Internet Traffic Modeling and Capacity Evaluation in UMTS
Jahangir Dadkhah Chimeh,Mohammad Hakkak,Paeiz Azmi 보안공학연구지원센터 2008 International Journal of Hybrid Information Techno Vol.1 No.2
UMTS (Universal Mobile Telecommunications System) can be connected to the data networks. So Internet traffic services such as WWW browsing, email, ftp, SMTP (Simple Mail Transfer Protocol) should be handled by UMTS. Each of the traffic services has some specific properties but all of them obey a basic ON/OFF model. For a specific traffic user there is some unused (OFF) times between transmitted packets which we may use them for other services. In this paper based on the offered traffic services, models and parameters presented in 3GPP (3th Generation Partnership Project) we calculate ON and OFF time durations of the above traffic services in some different data rates, then calculate their corresponding activity factors. Finally we survey their impacts on the UMTS capacity and users. Simulation showed that the number of packet traffic users could be increased in comparison with circuit switch voice traffic users because they have lower Erlang traffic figures.
Delay Calculation of Internet Traffic in Mobile Systems
Seyed Mohammadreza Hashemiannejad,Aziz Mahmoodi,Jahangir Dadkhah Chimeh 보안공학연구지원센터 2009 International Journal of Multimedia and Ubiquitous Vol.4 No.4
An important QoS factor for wireless network planning is delay. We should provide enough resources (bandwidth) for conveying the traffic load. Next generation wireless networks is going to be an all IP network. In this path, voice will be changed to packet. In this paper we introduce a queuing model and a radio resource management algorithm which maximize the system throughput (users), then compute their delays and show this delay is less than the mentioned delay in the 3GPP standards.