TAILIEUCHUNG - The 3G IP Multimedia Subsystem (IMS)

3GPP, or the Third Generation Partnership Project, was formed in late 1998 to specify the evolution of GSM into a third generation cellular system. Although much focus was placed on new higher bandwidth radio access methods, it was realized that the network infrastructure must also evolve in order to provide the rich services capable of taking advantage of higher bandwidths. The original GSM network infrastructure was very much circuit- and voicecentric. Although data capabilities were added over time the system retained much of its circuit-switched heritage and its inherent limitations. A new approach was needed | The 3G IP Multimedia Subsystem IMS The 3G IP Multimedia Subsystem IMS Merging the Internet and the Cellular Worlds Third Edition Gonzalo Camarillo and Miguel A. Garcia-Martin 2008 John Wiley Sons Ltd. ISBN 978-0-470-51662-1 The 3G IP Multimedia Subsystem IMS Merging the Internet and the Cellular Worlds Third Edition Gonzalo Camarillo Ericsson Finland Miguel A. Garcia-Martin Ericsson Spain WILEY A John Wiley and Sons Ltd Publication This edition first published 2008 2008 John Wiley Sons Ltd First edition first published 2004 2004 John Wiley Sons Ltd Second edition first published 2005 2005 John Wiley Sons Ltd Registered office John Wiley Sons Ltd The Atrium Southern Gate Chichester West Sussex PO19 8SQ United Kingdom For details of our global editorial offices for customer services and for information about how to apply for permission to reuse the copyright material in this book please see our website at . The right of the author to be identified as the author of this work has been asserted 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 except as permitted by the UK Copyright Designs and Patents Act 1988 without the prior permission of the publisher. Wiley also publishes its books in a variety of electronic formats. Some content that appears in print may not be available in electronic books. Designations used by companies to distinguish their products are often claimed as trademarks. All brand names and product names used in this book are trade names service marks trademarks or registered trademarks of their respective owners. The publisher is not associated with any product or vendor mentioned in this book. This publication is designed to provide accurate and authoritative information in regard to the subject matter covered. It is sold on the

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