Mobile virtual private networks (MVPNs) can provide remote users with easy, secure high-speed access to their enterprise network resources. There is a tremendous market opportunity for operators who can meet the needs of these users. Third-generation (3G) systems, such as Universal Mobile Telecommunications System (UMTS), and IEEE 802.11b wireless local area network (WLAN) systems have compleme...

One of the purposes of receive filtering in the Universal Mobile Telecommunication System (UMTS) terminal receiver is to provide channel selection selectivity. This enables the terminal to receive a desired signal in the presence of interfering signals. The worst case interference conditions in which an UMTS terminal still has to operate are defined by a number of conformance tests in the UMTS ...

Synopsis: This paper presents a network and functional architecture for the UMTS space segment. The transport of user data is done using ATM up to the BTS in the terrestrial segment and up to the FES in the satellite segment. The UMTS procedures and services are controlled by the MSCPs at the level of the LE, CSS, FES, and eventually on board the satellites. Many control entities implemented at...

The Universal Mobile Telecommunications System (UMTS) offers a panoply of 3G services. In addition to delivery of images, graphics and video communications, UMTS is used for such applications as banking and e-commerce and hence security is a critical concern. In the present paper, we are interested in the confidentiality feature in the UMTS Network Access. Ciphering when applied is performed in...

With the ever increasing penetration of IP technologies and the tremendous growth in wireless data traffic, the wireless industry is evolving the mobile core networks towards all IP technology. The 3 Generation Partnership Project (3GPP) is specifying an IP Multimedia Sub-system (IMS) in UMTS Release 5/6, which is adjunct to the UMTS Packet Switched (PS) GPRS CN. This IPbased network will allow...

In this paper, we present a synthetic traffic model for the Universal Mobile Telecommunication Systems (UMTS) based on measured trace data. The analysis and scaling process of the measured trace data with respect to different bandwidth classes constitutes the basic concept of the UMTS traffic characterization. Furthermore, we introduce an aggregated traffic model for UMTS networks that is analy...

The power consumption of wireless access networks will become an important issue in the coming years. In this paper the power consumption of base stations for mobile WiMAX, fixed WiMAX and UMTS is modelled. This power consumption is evaluated in relation to the coverage. For a physical bit rate of 2 Mbps, a power consumption of approximately 5600 W and a range of 1 km is obtained with UMTS. Fix...

The introduction of UMTS has fuelled the demand for mobile services having a range of QoS constraints. The mobile operator has the means to set network QoS levels but its final aim is to meet user satisfaction while minimizing resource consumption. In this article we study the relationship between UMTS network QoS levels and the user perception of QoS. We report our findings based on a subjecti...