Telecommunications - Böcker

This volume is the most comprehensive reference work on visual communications to date. An international group of well-known experts in the field provide up-to-date and in-depth contributions on topics such as fundamental theory, international standards for industrial applications, high definition television, optical communications networks, and VLSI design. The book includes information for learning about both the fundamentals of image/video compression as well as more advanced topics in visual communications research. In addition, the Handbook of Visual Communications explores the latest developments in the field, such as model-based image coding, and provides readers with insight into possible future developments. Displays comprehensive coverage from fundamental theory to international standards and VLSI design Includes 518 pages of contributions from well-known experts Presents state-of-the-art knowledge--the most up-to-date and accurate information on various topics in the field Provides an extensive overview of international standards for industrial applications

Voice over Internet Protocol (VoIP) has recently evolved from a simple capability for transporting voice communications into a much more powerful technology capable of changing the way voice applications are constructed, delivered, marketed and sold. Whilst VoIP has clearly provided a focus for much debate within the telecommunications industry, there has been a clear gulf between hype and reality. However the questions now being asked have migrated from 'Will it work?' to 'What will the industry look like when it is delivered at scale?'In Voice over IP: systems and solutions, Richard Swale has brought together key contributors from within the BT Group and externally, to cover all of the important issues surrounding telephony over IP networks. This authoritative book examines VoIP as a technology and its consideration within the industry, the motivations for VoIP networks, a review of the status of the major components of a VoIP network and their development, and both current and emerging applications. VoIP technology blurs the boundaries between fixed, mobile and multimedia communications and the implications are explored and discussed.The primary market for this comprehensive book is telecommunications engineers and developers, service providers and regulators. However, all those with a technical or business interest in this rapidly developing area of communications technology will also find this book highly relevant.

The business of telecommunications is undergoing a period of change driven by changes in regulation, increasing demands for services and the development of new access technologies. The market structure of telecommunications is evolving rapidly as new and existing players strive to compete in an increasingly volatile market, while the advent of new data services is placing greater demands on the network as operators strive to offer new broadband services. Underpinning much of this change is the access technology itself, not only in the transitional form of copper twisted pairs, but also increasingly through the use of new fibre, radio and copper systems. The dominant cost of most telecommunication networks is the access network itself, which typically can demand up to 80% of the total investment required.This book presents an overview of the access network and discusses the technologies that are available. It begins with an introductory chapter defining terms and technologies and goes on to discuss each technology in turn, not only from a technology viewpoint but with a view on how it might be best deployed. Chapters are also included on planning systems, network management, DSL, fibre access networks, optical access networks, fixed wireless access, broadband, wireless LANs, UMTS, and SDH in the access network.

Many organisations are transforming their businesses through the development of information and communications technologies. The security of this e-commerce is now a key enabler for businesses, and this book presents an overview of current and future infrastructures for e-business security.Coverage includes XML security mechanisms and next generation Public Key Infrastructures (PKIs), as well as digital archiving and wireless security, which is set to be a huge growth area with the full roll-out of 3G mobile networks. TETRA security, firewalls and Virtual Private Network (VPN) technologies are all discussed to provide business solutions for end-to-end secure networking.This book is essential reading for professionals, researchers and managers involved in the implementation of security in communications systems.

In today's increasingly competitive communications environment, Quality of Service (QoS) is of paramount importance in the battle to win market share. However, the enhanced expectations of customers and the introduction of many new services and technologies makes comprehending and meeting customer requirements a real challenge. Building on the issues covered in Quality of Service in Telecommunications (1997), this book examines the technical, service and human issues that need to be addressed in order to provide a level of QoS that will meet those requirements. One key objective is to increase the reader's understanding of the importance of QoS and to show how the concepts presented can be applied to the reader's own circumstances. The book provides a comprehensive overview of definitions and standards, frameworks and models, network performance, internet, mobile and satellite services, the impact on customers, external drivers, economics, fraud and security and future trends. The authors, established experts in their fields, have wide-ranging experience in both UK and US telecommunications companies, reflecting the global nature of this industry and the universal concept of QoS.

This book explores some of the technological challenges in the application of digital communications technology in the home, including provision of fast, 'always on' internet connections. It looks at the ways consumers will use broadband access and what the key applications will be for provider and consumer. More broadly it aims to describe how communication to and within the home is evolving, and how people's lives are changing as they take advantage of the new technology and its applications.The expert contributors consider delivery mechanisms for broadband, connecting the home to external networks as well as connecting devices and applications within the home. They discuss how people use and relate to the technology, and how it should be developed to meet their evolving needs. Current applications are described and how new applications are being developed to take advantage of new digital technology. Finally two visionaries give their insights into aspects of the future for the home environment and how much it will be a digital home.This fascinating book provides balanced coverage of the issues surrounding this next phase of the development of communications and the Internet, which may transform our homes and the way we live. It will be of major interest to engineers and other professionals working in communications, IT, new technology and entertainment, as well as those active in research within a number of fields of technology.

Telecommunications Regulation examines the background to regulation and the work of the regulator. It discusses typical regulatory rules and the legal and administrative framework for regulation, and looks at regulatory strategies, market structures and approaches to price control. The book includes a number of case studies which show how regulators engage with such topical issues as interconnection and loop unbundling, and also features technical coverage of both numbering and number portability. Finally, it looks at new products and services such as virtual network operators, intelligent networks, radio spectrum and next generation networks, and considers the impact these might have on the future of regulation.A comprehensive, in-depth guide to the subject, this book will be a valuable resource for engineers and managers in the industry, as well as lawyers and economists needing an insight into current telecommunications regulation.

As the Information Age evolves, customers need communications of high quality, excellent value and widespread mobility. The response is to establish efficient networks carrying a wide range of services. Signalling is at the heart of this revolution, energising networks to meet customer expectations.This book gives an introduction to the principles of signalling systems along with an in-depth examination of their architecture. Modern signalling systems are described in detail, including Signalling System No.7 and the Digital Subscriber Systems, while older systems are outlined in the appendices. Chapters are devoted to signalling for mobile networks, intelligent networks and private networks. Signalling interworking, the role in network management and meeting broadband requirements are also covered. Internet technologies are coming to the fore and a chapter explains some common Internet Protocols and highlights the striking similarities with telecommunications systems. The glossary and list of abbreviations cut through the maze of jargon.The book will appeal to a wide range of readership. Reading the chapters in sequence will provide a comprehensive description of signalling. Communications experts will find the chapter summaries useful in selecting appropriate text. Experts in specialised areas of signalling can use the book to expand their range of knowledge.

Vast numbers of radio systems are now in use, and with new users and new uses constantly emerging, these systems have the potential to interfere with each other.National agencies are empowered to control the use of radio to ensure that systems within their jurisdiction do not disrupt each other's services. Interference may also arise between radio systems operating in different countries. An elaborate code of regulations has been agreed, under the aegis of the International Telecommunication Union, to facilitate cooperation between the national agencies to control interference across frontiers. The Union also provides the global forum for the standardisation of radio systems where this has been found to be desirable.For some kinds of radio system, especially broadcasting and land mobile radio, governments may also find it necessary to determine which of the organisations competing to provide radio facilities for public use should be licensed and which should not. This process is known as regulation.Intended as a handbook for administrators and engineers, this book reviews the processes of interference management, regulation of competing service providers and system standardisation for the control and use of the radio spectrum. At a time when telecommunication services and broadcasting are being liberalised in many countries, this book will also provide new operators of radio facilities, private and public, with valuable insights into the regulatory process.

There has been unprecedented development in data communications and services since the first edition of this book was published in 1986. In less than a decade the technology has advanced beyond all recognition and the first edition is now really no more than an interesting historical record. The second edition, published in 1989, reflected some of these developments and introduced the then emerging proposals for an integrated services digital network (ISDN). Since that date ISDN has become a fact and has already begun to be superseded by proposals and standards for a broadband ISDN (B-ISDN), offering greatly enhanced and flexible data rates over a public network based mainly on optical fibre transmission. Optical fibre technology is also being used in wide-area private digital networks and for high-capacity internetworking operations.This third edition has new chapters on broadband ISDN, wide-area internetworking and second generation (broadband) LANs and MANs. The chapters from the second edition on data services over cellular and broadcast radio have been retained and updated. The chapter on standards and interfaces has needed to be completely revised.The final chapter gives a network user's view of the likely scenario for the development of image networks in the foreseeable future. On the back cover of the second edition I commented that what four years ago appeared as simply speculation was now a reality. The same is true for this third edition. If there should be a fourth edition in another four years time, we should not be surprised to find that duplex visual image communication, as opposed to broadcast TV, has become an accepted part of our way of life.

Since ATM was identified by the CCITT in 1988 as the target transfer mode for broadband communications, there has been considerable research activity on the topic world-wide. Within Europe, the RACE programme of the European Community has brought together experts from a wide variety of organisations to work on several projects. This book results from the work of one of those projects.Aimed at those interested in ATM generally, or those needing to understand the issues in designing or implementing broadband networks, the book draws on the results of the research project to present a description of ATM from a network point of view. Starting with the principles of ATM, it goes on to cover topics such as network performance, network structure, evolution and interworking. It also discusses more general issues including numbering, charging and the need for intelligence in the network. It concludes by explaining the current position on traffic engineering for broadband ATM networks.

One of the many problems facing designers of fibre systems is the basic question of how best to transmit analogue-sourced signals; either on dedicated point-to-point links or as part of mixed-mode traffic on a predominantly digital fibre service network. This book discusses the fundamental principles involved and describes a variety of techniques and applications. The chapters have been contributed by invited researchers with expertise in a range of areas and outline the latest methods and analytical approaches, components and systems.The general topics covered include subcarrier multiplexing (SCM) and coherent techniques, transmissions of TV signals, soliton and pulse time modulation methods and performance assessment of subcarrier multiplexed optical systems. Specific technological and system component issues addressed include generation and delivery of millimetre-waves over fibre systems for mobile communications, tuned optical receivers for fibre SCM systems and optical fibre amplifiers, and wavelength division multiplexing (WDM).Written by leading authorities in their fields, this graduate level text should be of interest to all scientists and engineers concerned with transmission of analogue-sourced information over fibre systems.

ISDN presents a new challenge for educators and trainers. This book provides an introduction to the technology for educators interested firstly in whether to use it and secondly in how to use it. The first three chapters discuss practical, educational and strategic issues related to these two questions. The following ten chapters provide case studies of education and training uses of ISDN technologies in Europe, the US and Australia. These involve videoconferencing, audiographics, desktop conferencing and image banks. The book concludes with a large glossary of explanatory material.

This topical book builds upon an earlier IEE text Personal & mobile radio systems, by the same editor, which set out the fundamental issues in a discipline that appeared to have global expansion potential. That potential has now become a reality, and something more than a new edition of the previous book was needed to bring it up to date. This book is completely new, drawing on the experience and the many intensive studies that have been concentrated in this field in the past five years.The book gives a clear and detailed insight into the fundamental problems and solutions found in modern personal communications: service requirements, coverage problems, multipath interference, cellular architectures and signalling, network management, data and supplementary services, satellite services. In particular it describes the approach of the GSM methodology, as one of the most intensively developed standards, to some of these problems, although the same principles also apply to DCS 1800 and other technologies.

This updated and extended new edition has been compiled from the course material of the highly successful IEE Vacation School of the same name. The vacation school was designed to give a broad introduction to the subject of satellite communications and provide the background knowledge and tools of the trade for those entering the field. The 3rd edition of the book continues this theme and up-to-date information on mobile and personal satellite constellations, navigation and positioning, and military and small satellite systems has been added, as well as a look to future Ka-band multimedia systems. We have also included updated ITU information and sections on history, organisation and the satellite business. The book differs from others on the subject in its pragmatic and engineering-oriented approach. The contributors are all current practitioners from industry or academics specialising in the field.The book is ideal for undergraduate or postgraduate students and practising engineers meeting the subject for the first time. However, it also providers the breadth and detail that make it suitable as a reference text.

This book bridges the worlds of the economist, the engineer, the regulator and the manager. It outlines the technology of the subject in sufficient detail to provide an understanding of the industry's economics, and presents a comprehensive picture of the markets into which its products and services are sold.Service supply monopolies are dissolving under the combined pressures of technological change, managerial inventiveness and regulation, leading the industry into uncharted waters. Competition is appearing in the local loop. International telecommunications services have been among the fastest to change, both technologically and in market structure. These developments, along with resale operations and their associated cost structures are analysed, as are the comparative advantages of satellite and cable systems.There are good economic reasons for optimism about what these changes will bring, not least in more efficient pricing and resource allocation, but important matters of public welfare are at stake, and these too are discussed.Examples and statistics are drawn across the full range of the world's nations, offering insights which may be missed when concentrating on the rich countries alone. While the book is of most value to industry professionals, the clarity of its analysis makes it useful to anyone with a business or academic interest in telecommunications

This book explains how intelligence can be introduced into digital telephone networks. Beginning by outlining the basic principles of Intelligent Networks (IN), it tracks the application of the IN principle of separation of the service logic for advanced telephony services from the underlying call control infrastructures. The book explains how large public networks are updated to incorporate IN principles for advanced telephony services. This is illustrated using many practical examples which are set against a background of following the ETSI standards within the overall ITU-T framework of recommendations. This book is targeted at postgraduate telecommunications students, or engineers requiring a concise and practical introduction to IN.

Communications networks are now dominated by Internet protocol (IP) technologies. Every aspect of networking, from access to the core network to the surrounding operational support systems, has been radically affected by the rapid development of IP technologies.This book comprehensively reviews the design, provision and operations of carrier-scale Internet networks. A good balance between leading edge technology and many of the practical issues surrounding carrier-scale IP networks is presented, including: the challenges in building and scaling a carrier-scale IP network, how to physically build and maintain Points of Presence (PoP) around the world, core transmission networks for the new millenium, delivery of IP over broadband access technologies and wireless access, dial access platform, an overview of satellite access networks, operations for the IP environment, operational support systems for carrier-scale IP networks, IP address management, traffic engineering, and IP virtual private networks. This makes for essential reading for telecommunications engineers and managers, researchers and postgraduate students in this rapidly changing area of communications technology.

This book explores the future of mobile communications networks from 3G trials, developments and products, to what will follow in the future. The increasing demands for services and higher quality continue to drive forward the technological capabilities. The implications of increasing mobile customer numbers on a global scale are investigated, as well as the convergence of mobile and the Internet, which, it is envisaged, will provide the next massive growth burst to the mobile market and 3G networks.The book covers the evolution to support multimedia architecture from GSM to UMTS, voice and Internet multimedia in UMTS networks, 3G service control, the OSA API and related issues; and mobile standards which are a critical dependency for 3G and future developments. The book also explores the Virtual University Research Initiative on mobility, Virtual Centre of Excellence in mobile and personal communications, and BT's other mobile ventures and alliances in the mobile arena.This book is essential reading for telecommunications engineers and managers, researchers and postgraduate students in communications who need to understand the expanding market expectations and the technological solutions available in this dynamic field.

The book is devoted to advanced radiocommunication, discussing the merits and operational aspects of spread spectrum signalling. Spread spectrum modulation is emerging as one of the most important tools for combatting a wide range of problems usually encountered in radiocommunication. For military applications the signalling is able to resist difficulties deliberately introduced by an enemy, such as jamming and eavesdropping. For civil application, the efficient signal multiplexing and multipath rejection capability is of great interest. The price paid however is the need for very complex processing of the radio signals. This task put great challenges on new technologies and design, and it is only recently that operational systems have started to emerge from the laboratories.The book starts by comparing spread spectrum modulation and conventional modulation methods, and then discusses demodulation, which requires both special acquisition and synchronisation techniques. The electronic warfare scenario is introduced, discussing the principles of various spreading techniques and possible countermeasures. The coding for bandwidth spreading in a direct sequence spread spectrum system is treated by discussing the most common codes and their different figures of merit with respect to multipath, code division multiplexing and signal concealment. The book also illustrates the possible benefits, as well as limits to the use of new hardware technology to accomplish the various functions necessary for successful operation of a spread spectrum system. The effect of the propagation environment on spread spectrum is treated both analytically and through reported experiments and simulations. Finally the book considers the task of designing a complete communication network and discusses the usefulness and technology for additional interference suppressing techniques suitable to work with spread spectrum systems.

The IEE in association with the IEEE and IERE organised an international specialist seminar on Advanced Signal Processing in Radar, Sonar and Communications, in September 1984. The Seminar was held at the University of Warwick and this book contains a collection of the papers presented. Some of the material is of a tutorial nature while some of it represents the latest state-of-the-art. Inevitably, because signal processing is limited by the components available, the subject matter ranges from the individual components and their impact on signal processing, through to the design and assessment of complete systems. The individual contributions come from industry, educational establishments and government research laboratories in the UK and the USA. The order of presentation in the book mainly follows the order in which the papers were presented at the seminar.

The aim of this book is to give a clear and concise exposition of the principles and practice of satellite communications by describing the development of communications-satellite services. It will be useful both to engineers who have worked in other fields of telecommunication and to students.The book describes the development of communications satellite services and explains how satellites and earth stations have evolved to meet changing requirements. It deals in a simple but practical way with the physics and geometry of the geostationary orbit, and the construction and operation of satellites and launch vehicles. It gives a thorough analysis of the essential factors governing the quality of speech, data and television signals received via satellite. Particular attention is paid to growth areas in satellite communications, including analogue television transmission, digital methods of transmission of speech and data, the use of satellites for maritime, aeronautical and land-mobile communications and VSATs (very-small aperture terminals).

This book has been written with the intention of helping those who ore concerned with planning, ordering, managing and using telecommunications facilities in connection with their business activities, and who do not wish to obtain a detailed technical and mathematical knowledge of the subject. The various types of telecommunications traffic are analysed without recourse to the underlying theory, and the reader is introduced to the terminology and operation of modern telecommunications systems and networks. Particular attention is paid to the relationship between traffic-carrying capacity and cost, and to the importance of traffic measurement and forecasting as a means of matching equipment provision to demand. The role of performance targets is discussed and the book explains how a comparison between public-network tariff options and the cost of private system and network alternatives can ensure a cost-effective solution to any communications problem. The principles are demonstrated by simple worked examples and a detailed glossary of terms is included.

Signalling is the life-blood of telecommunications and common-channel signalling is the key to providing flexible and cost-effective services to customers. This book commences with the basics of signalling and then unveils the complexities of common-channel signalling systems. The book is written to appeal to a wide range of readership. The novice can build up a comprehensive understanding of signalling by systematically making progress through the book. Experts in telecommunications who wish to understand the specialist subject can select appropriate text, guided by the chapter summaries. Experts in signalling will find the book useful in extending their knowledge of a very broad subject. The glossary cuts through the maze of jargon.The book describes basic principles, channel-associated signalling systems and the CCITT Signalling System No. 6. However, the focus of the book is upon common-channel signalling and CCITT Signalling System No. 7 and the Digital Subscriber Signalling System No. 1 are described in detail. The latest techniques are explained including, for example, the form of signalling required for gaining access to remote databases. The interworking of common-channel signalling systems is also described.

Telecommunications Network Modelling, Planning and Design addresses sophisticated modelling techniques from the perspective of the communications industry and covers some of the major issues facing telecommunications network engineers and managers today. Topics covered include network planning for transmission systems, modelling of SDH transport network structures and telecommunications network design and performance modelling, as well as network costs, ROI modelling and QoS in 3G networks. This practical book will prove a valuable resource to network engineers and managers working in today's competitive telecommunications environment.

Over the last two decades, mobile telecommunications has grown dramatically, from a small niche technology to a massive industry. Mobile telephones are now ubiquitous, and the divisions between PCs, PDAs, mobile telephones and other mobile devices are becoming increasingly blurred. Against this background, the security of information of both the devices themselves, and the information handled by these devices, is becoming ever more important.Security for Mobility pulls together up to the minute research from an international group of academics and professionals working in industry. The main text of the book is divided into five parts - underlying technologies; network security; mobile code issues; application security; and the future. Each chapter of the book is the collaboration of different authors, including many of the leading European experts currently working within the field. Thus each chapter is self-contained and can be read independently, although there are many relationships between the various chapters.The book will be of interest to engineers and computer scientists working in security-related aspects of the communications, computing and telecommunications industries, as well as postgraduate students and academics working within these fields.

The world is charging towards the new network technologies of broadband and 3G, and new application technologies face the challenge of where they can be used. This book takes a pragmatic look at two particular application technologies - location and personalisation - and presents an understanding of the technical and business impact of these technologies. With a combination of overview papers, detailed technical case studies and a deep understanding of actual implementatio of these services within a telecommunications environment, this book will help those wishing to deliver improved services based on these capabilities. Other key topics covered include CRM and content management.