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UMTS (Universal Mobile Telecommunication System) is the third generation telecommunications system based on WCDMA. WCDMA (Wideband Code Division Multiple Access) is the radio interface for UMTS. WCDMA is characterised by use of a wider band than CDMA. It has additional advantages of high transfer rate, and increased system capacity and communication quality by statistical multiplexing, etc. WCDMA efficiently utilises the radio spectrum to provide a maximum data rate of 2 Mbit/s. UMTS (Universal Mobile Telecommunication System) will offer a consistent set of services to mobile computer and phone users no matter where they are located in the world. Based on the GSM (Global System for Mobile communication) communication standard, UMTS, endorsed by major standards bodies and manufacturers, is the planned standard for mobile users around the world by 2002. Todaya s cellular telephone systems are mainly circuit–switched, with connections always dependent on circuit availability. Packet–switched connection, using the Internet Protocol (IP), means that a virtual connection is always available to any other end point in the network. It will also make it possible to provide new services, such as alternative billing methods (pay–per–bit, pay–per–session, flat rate, asymmetric bandwidth, and others).

This book offers a comprehensive and detailed description of services and protocols of the systems. Particular attention is paid to the radio-related specifics required for establishment of a mobile communication system. All systems described have been implemented during research for analysis of their performance by event driven stochastic simulation under typical traffic loads. Consequently the similarities and differences between systems are described clearly and coherently. This book includes: expanded and updated chapter on GPRS/EDGE and performance evaluation results of EDGE and UMTS; completely new material in chapter 5; 3rd Generation Networks; revised and expanded chapter on Wireless Local Area Networks including a performance comparison of HIPERLAN/2 and IEEE 802.11a; new sections on Bluetooth, WAP and WML, Terrestrial Trunked Radio (ETSI/TETRA) and related systems; and, detailed analysis of GSM driven services, and Universal Personal Telecommunications.