tailieunhanh - ENERGY EFFICIENCY IN COMMUNICATIONS AND NETWORKS

The field of information and communication technologies continues to evolve and grow in both the research and the practical domains. However, energy efficiency is an aspect in communication technologies that until recently was only considered for embedded, mobile or handheld battery constraint devices. Today, and driven by cost and sustainability concerns about the energy and carbon footprint of the IT infrastructure we see energy efficiency becoming a pervasive issue that is considered in all information technology areas starting at the circuit level to device architecture and platforms to the system level of whole datacenters management | ENERGY EFFICIENCY IN COMMUNICATIONS AND NETWORKS Edited by Sameh Gobriel Energy Efficiency in Communications and Networks Edited by Sameh Gobriel Published by InTech Janeza Trdine 9 51000 Rijeka Croatia Copyright 2012 InTech All chapters are Open Access distributed under the Creative Commons Attribution license which allows users to download copy and build upon published articles even for commercial purposes as long as the author and publisher are properly credited which ensures maximum dissemination and a wider impact of our publications. After this work has been published by InTech authors have the right to republish it in whole or part in any publication of which they are the author and to make other personal use of the work. Any republication referencing or personal use of the work must explicitly identify the original source. As for readers this license allows users to download copy and build upon published chapters even for commercial purposes as long as the author and publisher are properly credited which ensures maximum dissemination and a wider impact of our publications. Notice Statements and opinions expressed in the chapters are these of the individual contributors and not necessarily those of the editors or publisher. No responsibility is accepted for the accuracy of information contained in the published chapters. The publisher assumes no responsibility for any damage or injury to persons or property arising out of the use of any materials instructions methods or ideas contained in the book. Publishing Process Manager Daria Nahtigal Technical Editor Teodora Smiljanic Cover Designer InTech Design Team First published March 2012 Printed in Croatia A free online edition of this book is available at Additional hard copies can be obtained from orders@ Energy Efficiency in Communications and Networks Edited by Sameh Gobriel p. cm. ISBN 978-953-51-0482-7 INTECH open science I open minds free online editions