Đây là bộ sách tiếng anh cho dân công nghệ thông tin chuyên về bảo mật,lập trình.Thích hợp cho những ai đam mê về công nghệ thông tin,tìm hiểu về bảo mật và lập trình.
JOCHEN SCHILLER JOCHEN SCHILLER SCHILLER Second Edition Second Edition Second Edition The mobile communications market remains the fastest growing segment of the global computing and communications business.The rapid progress and convergence of the field has created a need for new techniques and solutions, knowledgeable professionals to create and implement them, and courses to teach the background theory and technologies while pointing the way towards future trends. In this book Jochen Schiller draws on his extensive experience to provide a thorough grounding in mobile communications, describing the state of the art in industry and research while giving a detailed technical background to the area.The book covers all the important aspects of mobile and wireless communications from the Internet to signals, access protocols and cellular systems, emphasizing the key area of digital data transfer. It uses a wide range of examples and other teaching aids, making it suitable for self-study and university classes. The book begins with an overview of mobile and wireless applications, covering the history and market, and providing the foundations of wireless transmission and Medium Access Control. Four different groups of wireless network technologies are then covered: telecommunications systems, satellite systems, broadcast systems and wireless LAN.The following chapters about the network and transport layers address the impairments and solutions using well-known Internet protocols such as TCP/IP in a mobile and wireless environment.The book concludes with a chapter on technologies supporting applications in mobile networks, focusing on the Web and the Wireless Application Protocol (WAP). Each chapter concludes with a set of exercises for self-study (with solutions available to instructors) and references to standards, organizations and research work related to the topic. New to this edition ➤ Integration of higher data rates for GSM (HSCSD, GPRS) ➤ New material on 3rd generation (3G) systems with in-depth discussion of UMTS/W-CDMA ➤ Addition of the new WLAN standards for higher data rates: 802.11a, b, g and HiperLAN2 ➤ Extension of Bluetooth coverage to include IEEE 802.15, profiles and applications ➤ Increased coverage of ad-hoc networking and wireless profiled TCP ➤ Migration of WAP 1.x and i-mode towards WAP 2.0 Jochen Schiller is head of the Computer Systems and Telematics Working Group in the Institute of Computer Science, Freie Universität Berlin, and a consultant to several companies in the networking and communications business. His research includes mobile and wireless communications, communication architectures and operating systems for embedded devices, and QoS aspects of communication systems. Cover image © Photonica ADDISON-WESLEY A Pearson Education book ADDISON WESLEY www.pearson-books.com Schiller_ppr 9/19/07 3:38 PM Page 1 Mobile Communications 01Prelims 8804 (i-xx) 30/5/03 11:03 am Page i 01Prelims 8804 (i-xx) 30/5/03 11:03 am Page ii Jochen H. Schiller Mobile Communications Second Edition 01Prelims 8804 (i-xx) 30/5/03 11:03 am Page iii PEARSON EDUCATION LIMITED Edinburgh Gate Harlow CM20 2JE Tel:+44 (0)1279 623623 Fax:+44 (0)1279 431059 Website: www.pearsoned.co.uk First Published in Great Britain 2000 Second edition 2003 © Pearson Education Limited 2003 ISBN 0 321 12381 6 The right of Jochen Schiller to be identified as author of this work has been asserted by him in accordance with the Copyright, Designs, and Patents Act 1988. All rights reserved; no part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise without either the prior written permission of the Publishers or a licence permitting restricted copying in the United Kingdom issued by the Copyright Licensing Agency Ltd, 90 Tottenham Court Road, London W1T 4LP. The programs in this book have been included for their instructional value. The publisher does not offer any warranties or representations in respect of their fitness for a particular purpose, nor does the publisher accept any liability for any loss or damage (other than for personal injury or death) arising from their use. All trademarks used herein are the property of their respective owners. The use of any trademark in this text does not vest in the author or publisher any trademark ownership rights in such trademarks, nor does the use of such trademarks imply any affiliation with or endorsement of this book by such owners. British Library Cataloguing-in-Publication Data A catalogue record for this book is available from the British Library. Library of Congress Cataloging in Publication Data A catalog record for this book is available from the Library of Congress. 10 9 8 7 6 5 4 3 2 1 08 07 06 05 04 Text design by barker/hilsdon @ compuserve.com Typeset by Pantek Arts Ltd., Maidstone, Kent Printed and bound in Great Britain by Biddles Ltd, www.biddles.co.uk The publishers’ policy is to use paper manufactured from sustainable forests. 01Prelims 8804 (i-xx) 30/5/03 11:03 am Page iv To my students and Cora 01Prelims 8804 (i-xx) 30/5/03 11:03 am Page v 1 01Prelims 8804 (i-xx) 30/5/03 11:03 am Page vi Contents About the author xiv Preface xv Acknowledgements xix 1 Introduction 1 1.1 Applications 3 1.1.1 Vehicles 3 1.1.2 Emergencies 4 1.1.3 Business 4 1.1.4 Replacement of wired networks 5 1.1.5 Infotainment and more 5 1.1.6 Location dependent services 6 1.1.7 Mobile and wireless devices 7 1.2 A short history of wireless communication 9 1.3 A market for mobile communications 15 1.4 Some open research topics 16 1.5 A simplified reference model 18 1.6 Overview 20 1.7 Review exercises 23 1.8 References 23 2 Wireless transmission 25 2.1 Frequencies for radio transmission 26 2.1.1 Regulations 27 2.2 Signals 31 2.3 Antennas 32 2.4 Signal propagation 35 2.4.1 Path loss of radio signals 36 2.4.2 Additional signal propagation effects 37 2.4.3 Multi-path propagation 39 01Prelims 8804 (i-xx) 30/5/03 11:03 am Page vii 2.5 Multiplexing 41 2.5.1 Space division multiplexing 41 2.5.2 Frequency division multiplexing 43 2.5.3 Time division multiplexing 44 2.5.4 Code division multiplexing 45 2.6 Modulation 46 2.6.1 Amplitude shift keying 48 2.6.2 Frequency shift keying 49 2.6.3 Phase shift keying 49 2.6.4 Advanced frequency shift keying 50 2.6.5 Advanced phase shift keying 51 2.6.6 Multi-carrier modulation 53 2.7 Spread spectrum 54 2.7.1 Direct sequence spread spectrum 56 2.7.2 Frequency hopping spread spectrum 59 2.8 Cellular systems 61 2.9 Summary 64 2.10 Review exercises 65 2.11 References 66 3Medium access control 69 3.1 Motivation for a specialized MAC 70 3.1.1 Hidden and exposed terminals 70 3.1.2 Near and far terminals 71 3.2 SDMA 72 3.3 FDMA 72 3.4 TDMA 73 3.4.1 Fixed TDM 74 3.4.2 Classical Aloha 75 3.4.3 Slotted Aloha 76 3.4.4 Carrier sense multiple access 76 3.4.5 Demand assigned multiple access 77 3.4.6 PRMA packet reservation multiple access 78 3.4.7 Reservation TDMA 79 3.4.8 Multiple access with collision avoidance 79 3.4.9 Polling 82 3.4.10 Inhibit sense multiple access 82 3.5 CDMA 82 3.5.1 Spread Aloha multiple access 87 Mobile communicationsviii 01Prelims 8804 (i-xx) 30/5/03 11:03 am Page viii 3.6 Comparison of S/T/F/CDMA 89 3.7 Review exercises 91 3.8 References 92 4Telecommunications systems 93 4.1 GSM 96 4.1.1 Mobile services 98 4.1.2 System architecture 100 4.1.3 Radio interface 105 4.1.4 Protocols 110 4.1.5 Localization and calling 113 4.1.6 Handover 117 4.1.7 Security 120 4.1.8 New data services 122 4.2 DECT 130 4.2.1 System architecture 131 4.2.2 Protocol architecture 132 4.3 TETRA 134 4.4 UMTS and IMT-2000 136 4.4.1 UMTS releases and standardization 141 4.4.2 UMTS system architecture 142 4.4.3 UMTS radio interface 143 4.4.4 UTRAN 149 4.4.5 Core network 151 4.4.6 Handover 154 4.5 Summary 156 4.6 Review exercises 158 4.7 References 160 5 Satellite systems 165 5.1 History 165 5.2 Applications 166 5.3 Basics 169 5.3.1 GEO 173 5.3.2 LEO 174 5.3.3 MEO 175 Contents ix 01Prelims 8804 (i-xx) 30/5/03 11:03 am Page ix [...]... done today 1.1.7 Mobile and wireless devices Even though many mobile and wireless devices are available, there will be many more in the future There is no precise classification of such devices, by size, shape, weight, or computing power Currently, laptops are considered the upper end of the mobile device range.3 The following list gives some examples of mobile and wireless devices graded by increasing... world wide web) onto mobile and wireless devices New applications and new mobile networks will bring ubiquitous multimedia computing to the mass market; radios, personal digital assistants (PDAs), laptops and mobile phones will converge and many different functions will be available on one device – operating on top of Internet technologies This book is an introduction to the field of mobile communications... http://www.booksites.net /schiller This book addresses people who want to know how mobile phone systems work, what technology will be next in wireless local area networks, and how mobility will influence applications, security, or IP networks Engineers working in fixed networks can see paths of migration towards mixed fixed /mobile networks The book follows a ‘tall and thin’ approach It covers a whole course in mobile communication,... people meet to play together 1.1.6 Location dependent services 5 Figure 1.2 Mobile and wireless services – always best connected 02Chap01 8804 (1-24) 6 30/5/03 11:03 am Page 6 Mobile communications Many research efforts in mobile computing and wireless networks try to hide the fact that the network access has been changed (e.g., from mobile phone to WLAN or between different access points) or that a wireless... additional mechanisms can be integrated to support a mobile device Intermediate results of calculations, state information, or cache contents could ‘follow’ the mobile node through the fixed network As soon as the mobile node reconnects, all information is available again This helps to reduce access delay and traffic within the fixed network Caching of data on the mobile device (standard for all desktop systems)... Communications – and welcome to the confusing, complex, but very interesting world of wireless and mobile technologies! In the last few years, we have all experienced the hype and frustration related to mobile technology Once praised as the Internet on the mobile phone, the frustration with third generation mobile phone systems came at the same time the dotcoms crashed The reader should remember that all... communications ● ● ● ● where it may be necessary to page a larger number of users reliably within short time Mobile phones: The traditional mobile phone only had a simple black and white text display and could send/receive voice or short messages Today, mobile phones migrate more and more toward PDAs Mobile phones with full color graphic display, touch screen, and Internet browser are easily available Personal... available system for mobile communication in some very remote places (NMT at 900 MHz followed in 1986) Several other national standards evolved and by the early 1980s Europe had more than a handful of different, completely incompatible analog mobile phone standards In accordance with the general idea of a European Union, the European countries decided to develop a pan-European mobile phone standard... Bechler, Stefan Dresler, Jochen Seitz, and Günter Schäfer I want to thank Hartmut Ritter for his support by taking over some of my daily routine work I also had help from Verena Rose and Elmar Dorner during the early stages of the course material I also want to thank the former head of the Institute of Telematics, Prof Gerhard Krüger, for giving me the freedom and support to set up the Mobile Communications... billions of embedded processors that have to communicate with, for instance, cameras, mobile phones, CD-players, headsets, keyboards, intelligent traffic signs and sensors This plethora of devices and applications show the great importance of mobile communications today Before presenting more applications, the terms mobile and ‘wireless’ as used throughout this book should be defined There are two different . JOCHEN SCHILLER JOCHEN SCHILLER SCHILLER Second Edition Second Edition Second Edition The mobile communications market remains. towards future trends. In this book Jochen Schiller draws on his extensive experience to provide a thorough grounding in mobile communications, describing