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Journal of Computer Networks and Communications
Volume 2012 (2012), Article ID 767920, 8 pages
http://dx.doi.org/10.1155/2012/767920
Research Article

Energy Efficiency Adaptation for Multihop Routing in Wireless Sensor Networks

School of Information Technology and Engineering, University of Ottawa, 800 King Edward Avenue, Ottawa, ON, Canada K1N 6N5

Received 18 June 2012; Accepted 17 September 2012

Academic Editor: Runhua Chen

Copyright © 2012 Abdellah Chehri and Hussein T. Mouftah. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Wireless sensor networks (WSNs) are considered as a suitable solution for long-time and large-scale outdoor environmental monitoring. However, an important feature that distinguishes the WSNs from traditional monitoring systems is their energy constraints. In fact, these nodes have often a limited and usually nonreplenishable power source. Therefore managing these limited resources is a key challenge. In this paper we use an optimization scheme based on adaptive modulation and power control for a green routing protocol. The optimization mechanism is subject to certain QoS requirements in terms of total end-to-end delay time and bit error rate. The simulation results show that the proposed algorithm can, theoretically, reduce the consumed energy of the sensor nodes almost to half.