UMTS: The Fundamentals
Wiley, Jun 27, 2003 - Technology & Engineering - 324 pages
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.
Today′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). The higher bandwidth of UMTS also promises new services, such as video conferencing and promises to realise the Virtual Home Environment (VHE) in which a roaming user can have the same services to which the user is accustomed when at home or in the office, through a combination of transparent terrestrial and satellite connections.
∗ Provides an introduction to cellular networks and digital communications
∗ Covers the air interface, radio access network and core network
∗ Explains the Release ′99 specifications clearly and effectively
∗ Discusses UMTS services and future services beyond 3G
∗ Features numerous problems and solutions in order to aid understanding
Ideal for Academics and students on telecommunications, electronics and computer science courses, research and development engineers working in mobile/wireless communications and Cellular operators and technical consultants.
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Cellular Mobile Radio Networks
Standardisation and Spectrum
UMTS System Architecture
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3GPP Application architecture band bandwidth base station bit rate called CDMA cell cellular chip rate circuit-switched code sequence codec communication connection core network coverage data blocks data rate data stream data transmission Division Multiple Access downlink DPCCH DPCH DPDCH Figure fixed network frame frequency channel functions GGSN GPRS HiperLAN/2 implemented Integration Reference Point interference power interleaving Internet kbit/s link budget location area M-AP MAC layer mobile radio network mobile radio systems mobile station modulation Multiple Access network operator Node orthogonal packet-switched physical channels physical layer power control protocol stack QPSK radio interface RANAP RLC layer SGSN slot soft handover spectrum spreading codes spreading factor sublayer Supplementary Service switching Synchronisation Synchronisation Channel TDD mode TDMA technique Telecommunication management terminals traffic transmission rate transmitted transmitter power transport blocks transport channels transport format uplink user data user signals USIM UTRAN W-LANs wireless