The continuously growing of cellular net complexity, that followed the introduction of UMTS technology, has reduced the usefulness of traditional design tools, making them quite unworthy. The purpose of this paper is to illustrate a design tool for UMTS optimized net planning based on genetic algorithms. In particular, some utilities for 3G net designers, useful to respect important aspects (su...

The paper presents a new analytical method for blocking probability determination in the WCDMA interface of the UMTS network with priorities. In our considerations we use a new model of the full-availability group servicing PCT1 and PCT2 multi-rate traffic with priorities. The proposed scheme is applicable for cost-effective WCDMA resource management in 3G mobile networks and can be easily appl...

An improved technique with a fractional sampling based on two samples per chip, according to the Nyquist criterion, has been employed by the authors to enhance the performance in the code synchronization of UMTS (or W-CDMA) systems. In this paper, we investigate on the theoretical rationale of such a promising behavior. The performance is analyzed for several wireless channels, in the presence ...

With the increasing use of mobile and nomadic communication devices requirements for security and privacy are rising as well. Following brief surveys of existing approaches to mobility management, general security considerations for UMTS and confidential storing of location information we introduce the ideas and concepts behind the new ‘anonymous subscriber’ method for UMTS, largely based on ex...

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...

A system simulator for performance evaluation of adaptive antennas in UMTS FDD networks has been developed. The simulator is flexible, it uses realistic channel and system assumptions, and for a given scenario provides the maximum network capacity. The antenna types included in the simulator are switched lobe, phased array and adaptive array as well as conventional fixed sector antenna. Analyse...

The latest chapter in the annals of standardization skullduggery–or, so far, alleged standardization skullduggery– involves the Universal Mobile Telephone System (UMTS) standard. Broadcom Corp., a manufacturer of semiconductor ICs (chipsets) for communications applications, has sued Qualcomm Inc., another chipset manufacturer and the owner of patents essential to complying with the standard. Br...

In this paper, we are concerned with the performance evaluation of code allocation algorithms in Universal Mobile Telecommunication System (UMTS) networks. UMTS networks will offer multiple services (voice, data, video, etc.) with different quality-of-service (QoS) requirements to mobile users. In this paper, we evaluate the performance of different code (rate) allocation algorithms on the UMTS...