Cognitive Radio Mobile Ad Hoc Networks
Cognitive radio (CR) is one of today’s up-and-coming technologies. It facilitates communication because it creates greater efficiencies in mobile networks. CR allows unlicensed (secondary) users to exploit, in an opportunistic or ad hoc manner, the radio
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F. Richard Yu Editor
Cognitive Radio Mobile Ad Hoc Networks
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Editor F. Richard Yu School of Information Technology Department of Systems and Computer Engineering Carleton University Ottawa, K1S 5B6 ON, Canada [email protected]
ISBN 978-1-4419-6171-6 e-ISBN 978-1-4419-6172-3 DOI 10.1007/978-1-4419-6172-3 Springer New York Dordrecht Heidelberg London Library of Congress Control Number: 2011933806 c Springer Science+Business Media, LLC 2011 All rights reserved. This work may not be translated or copied in whole or in part without the written permission of the publisher (Springer Science+Business Media, LLC, 233 Spring Street, New York, NY 10013, USA), except for brief excerpts in connection with reviews or scholarly analysis. Use in connection with any form of information storage and retrieval, electronic adaptation, computer software, or by similar or dissimilar methodology now known or hereafter developed is forbidden. The use in this publication of trade names, trademarks, service marks, and similar terms, even if they are not identified as such, is not to be taken as an expression of opinion as to whether or not they are subject to proprietary rights. Printed on acid-free paper Springer is part of Springer Science+Business Media (www.springer.com)
To my parents and my family
Preface
1 Introduction Cognitive radio (CR) is an enabling technology to allow unlicensed (secondary) users to exploit the spectrum allocated to licensed (primary) users in an opportunistic manner. CR is widely considered as a promising technology to deal with the spectrum shortage problem caused by the current inflexible spectrum allocation policy. It is capable of sensing its radio environment, and adaptively choosing transmission parameters according to sensing outcomes, which improves cognitive radio system performance and avoids interfering with primary users. CR has been considered in mobile ad hoc networks (MANETs), which enable wireless devices to dynamically establish networks without necessarily using a fixed infrastructure. CR technology will have significant impacts on the performance in wireless networks, especially in MANETs. Certainly, issues in non-cognitive MANETs in general are still of interest in the CR paradigm. However, some distinct characteristics of CRs introduce new non-trivial issues to CR-MANETs. The changing spectrum environment and the importance of protecting the transmission of the licensed users of the spectrum mainly differentiate classical MANETs from CR-MANETs. The cognitive capability and re-configurability of CR-MANETs have opened up several areas of research which have been explored extensively and continue to attract research and development. The book will describe the concepts, intrinsic properties, and research challenges of CR-MANETs. Dynamic spectrum access, protocol design, multimedia transmission, modeling, and optimization of CR-MANETs are some of the major research issues related to the development of CR-MANETs. The contributed articles in this book from the leading experts i
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