Efficient support of Internet-based applications to mobile/nomadic users is a key feature of the thirdgeneration (3G) networks. In light of the shortage and the high cost of the T-UMTS spectrum, the operators are looking into the provision of integrated broadcast/multicast services through hybrid broadcast-UMTS systems. S-UMTS could play an important role in the efficient delivery of some UMTS ...

The Universal Mobile Telecommunication System (UMTS) is a third generation (3G) mobile communications system that provides a range of broadband services to the world of wireless and mobile communications. The UMTS delivers low-cost, mobile communications at data rates of up to 2 Mbps. It preserves the global roaming capability of second generation GSM/GPRS networks and provides new enhanced cap...

Universal Mobile Telecommunications System (UMTS) constitutes the premier 3 Generation (3G) wireless technology that is dominating over the global market. Multicasting is an efficient method of supporting group communication as it allows the transmission of packets to multiple destinations using fewer network resources. The need for broadcasting and multicasting in UMTS led to the definition of...

Abstract--In this paper the performance of WLAN is analyzed in the presences of UMTS nodes. To analyze this interference UMTS are nodes are moving using different trajectories. While moving UMTS nodes handoff (soft and hard) techniques are used in this paper. To analyze this effect OPNET modeler is used. The performance is compared In terms of load, media access delay and packet delay variation...

UMTS (Universal Mobile Telecommunications System) is the most expanding mobile technology nowadays. Evolution of networks proceeds with improvement of the core network and with integration of alternative wireless access networks. To improve present communication systems, an UMTS standard compliant simulation environment is essential. This paper introduces an UTRAN (UMTS Terrestrial Radio Access...

In this paper the effect of interference of UMTS is analysed on WLAN. The effect is analysed by varying the speed of UMTS nodes. To analyse this effect opnet modeler 14.5 is used. The interference is analysed in terms of Video traffic received, Voice traffic received and Load. Result shows that the better performance has been achieved in the absence of UMTS nodes as compare to their presence in...

This paper present an example of call control using the Session Initiation Protocol (SIP) for multimedia call management in the “all IP” architecture for the core network of UMTS. The first part of this publication gives an overview of the 3GPP IP-based UMTS core network. The second part introduces an interworking scenario between the UMTS core network and the SIP-enabled public Internet. The c...

The third generation UMTS auction in Germany raised an enormous amount of revenue, and at the same time achieved a more competitive market structure than other UMTS auctions in Europe. The present paper explains the design of that auction, and presents a game theoretic explanation of observed events during the crucial phase of that auction, which have puzzled several observers. In addition, the...

The paper presents results of research on effects long term continuous animals exposure to multi-frequency electromagnetic fields the mobile communication standards (GSM, UMTS and LTE). Prooxidant antioxidant activity was investigated in blood exposed Wistar rats. were continuously at frequencies 1800, 2100 2600 MHz with total power density 250 muW/cm2 (GSM-20%; UMTS-20%; LTE-60%). Peripheral s...

This document specifies an Extensible Authentication Protocol (EAP) mechanism for authentication and session key distribution using the UMTS AKA authentication mechanism. AKA is based on symmetric keys, and runs typically in a UMTS Subscriber Identity Module, a smart card like device. AKA provides also backward compatibility to GSM authentication, making it possible to use EAP AKA for authentic...