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A WSN is composed of a large number of sensor nodes that are communicating using a wireless medium. The sensor nodes are deployed in the environment to be monitored in ad hoc structure. In WSN, there is sink node that collects data from all sensors, and usually not all nodes hear all other nodes. WSN is considered a multi-hop network. | WIRELESS SENSOR NETWORKS Edited by Suraiya Tarannum INTECHWEB.ORG Wireless Sensor Networks Edited by Suraiya Tarannum Published by InTech Janeza Trdine 9 51000 Rijeka Croatia Copyright 2011 InTech All chapters are Open Access articles distributed under the Creative Commons Non Commercial Share Alike Attribution 3.0 license which permits to copy distribute transmit and adapt the work in any medium so long as the original work is properly cited. 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. 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 articles. 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. Technical Editor Sonja Mujacic Cover Designer Martina Sirotic Image Copyright Used under license from Shutterstock.com First published June 2011 Printed in India A free online edition of this book is available at www.intechopen.com Additional hard copies can be obtained from orders@intechweb.org Wireless Sensor Networks Edited by Suraiya Tarannum p. cm. IsBn 978-953-307-325-5 I kfTE LI OPEN ACCESS INI Cvn PUBLISHER INTECH open free online editions of InTech Books and Journals can be found at .
