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AN INTRODUCTION TO LTE
LTE, LTE-ADVANCED, SAE
AND 4G MOBILE COMMUNICATIONS
Christopher Cox
Director, Chris Cox Communications Ltd, UK
A John Wiley & Sons, Ltd., Publication
This edition first published 2012 2012 John Wiley & Sons Ltd
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Library of Congress Cataloging-in-Publication Data
Cox, Christopher (Christopher Ian), 1965-
An introduction to LTE : LTE, LTE-advanced, SAE and 4G mobile communications / Christopher Cox. p. cm.
Includes bibliographical references and index. ISBN 978-1-119-97038-5 (cloth)
1. Long-Term Evolution (Telecommunications) 2. Mobile communication systems – Standards. I. Title. TK5103.48325.C693 2012
621.3845’6 – dc23
2011047216
A catalogue record for this book is available from the British Library.
Print ISBN: 9781119970385
Set in 10/12 Times by Laserwords Private Limited, Chennai, India
To my nieces, Louise and Zoe
Contents
Preface xvii
Acknowledgements xix
List of Abbreviations xxi
1 Introduction 1 1.1 Architectural Review of UMTS and GSM 1 1.1.1 High Level Architecture 1
1.1.2 Architecture of the Radio Access Network 2 1.1.3 Architecture of the Core Network 4 1.1.4 Communication Protocols 4
1.2 History of Mobile Telecommunication Systems 6 1.2.1 From 1G to 3G 6 1.2.2 Third Generation Systems 7
1.3 The Need for LTE 8 1.3.1 The Growth of Mobile Data 8 1.3.2 Capacity of a Mobile Telecommunication System 10 1.3.3 Increasing the System Capacity 11 1.3.4 Additional Motivations 11
1.4 From UMTS to LTE 11 1.4.1 High Level Architecture of LTE 11 1.4.2 Long Term Evolution 12 1.4.3 System Architecture Evolution 13
1.5 From LTE to LTE-Advanced 15 1.5.1 The ITU Requirements for 4G 15 1.5.2 Requirements of LTE-Advanced 15 1.5.3 4G Communication Systems 15 1.5.4 The Meaning of 4G 16
1.6 The 3GPP Specifications for LTE 16 References 18
2 System Architecture Evolution 21 2.1 Architecture of LTE 21 2.1.1 High Level Architecture 21
2.1.2 User Equipment 21 2.1.3 Evolved UMTS Terrestrial Radio Access Network 23
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