In this paper is studied the relation of WLAN, WIMAX and WCDMA towards UMTS in the point of whether these new technologies are the replacement or complementary to the UMTS. Currently, work is under way within ETSI to define a third generation mobile telecommunications system, known as the Universal Mobile Telecommunications System (UMTS), to be introduced in the early years of the 21st century....

This paper introduces a combined UMTS/NAVSAT receiver architecture. After a review of the state-of-the-art, a configurable UMTS/NAVSAT architecture is proposed. The investigated concept is based on a reconfigurable receive chain to prevent duplication of hardware, which will result in considerably lower costs. The biggest challenge in the design of NAVSAT receivers are the extremely tight noise...

The Universal Mobile Telecommunication Standard (UMTS) is continuously evolving to meet the growing demand of modern mobile and Internet applications for high capacity and advanced features in security and quality of service. Although admittedly enhanced in terms of security when compared to 2G systems, UMTS still has weaknesses that can lead to security incidents. In this paper we investigate ...

This paper presents results from co-existence measurements between multiple ultra wideband (UWB) transmitters and a UMTS mobile phone carried out at the Centre for Wireless Communications (CWC), University of Oulu, Finland. Two environments were explored with the measurements; an anechoic chamber, and inside a shelter (simulating cell boundary conditions). Large numbers of FCC compatible UWB tr...

This contribution presents an overview of the security of the 3 generation mobile radio system UMTS as currently standardised by the 3 Generation Partnership Project 3GPP. We discuss the underlying principles and show to which extent the security of 2 generation systems as GSM is improved and enhanced by UMTS. The UMTS Authentication and Key Agreement protocol, the security algorithms deployed ...

The recent European Telecommunications Standards Institute (ETSI) decision to endorse for the Universal Telecommunication Radio Access ??? (UTRA) techniques based upon wideband-CDMA approaches for terrestrial UMTS (T-UMTS) paired frequency duplexing band will certainly constitute an important driver to orientate the corresponding choice for the satellite UMTS (S-UMTS) component. In this paper i...

Universal Mobile Telecommunications System (UMTS) is a third-generation cellular network that enables high-speed wireless Internet access. It can provide maximum data-rates ranging from 64kb/s to 2Mb/s in different environmental types. UMTS is designed to provide access to the existing Internet services as well as to UMTS specific services. It will augment the existing capabilities of 2G mobile...

The Universal Mobile Telecommunications System (UMTS) has a number of service classes that require end-to-end QoS support. This requirement imposes on the design of the UMTS backbone bearer service as a part of the UMTS hierarchical QoS architecture. This paper presents a methodology of provisioning QoS in the UMTS backbone network based on the Differentiated Services (DiffServ) model, a relati...

UMTS networks promise to offer always on, ubiquitous connectivity with relatively low data rates for moderate to high mobility users in macro cell environments. On the other hand, IEEE 802. 11 (WLAN) offers much higher data rates, comparable to 3G and other wireless local area networks, to users with low mobility characteristics in smaller cell environments. Where UMTS/WLAN networks overlap, a ...

In this paper is studied the relation of WLAN, WIMAX and WCDMA towards UMTS in the point of whether these new technologies are the replacement or complementary to the UMTS. Currently, work is under way within ETSI to define a third generation mobile telecommunications system, known as the Universal Mobile Telecommunications System (UMTS), to be introduced in the early years of the 21st century....