Energy efficiency adaptation for multihop routing in wireless sensor networks

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. copyright © 2012 abdellah chehri and hussein t. mouftah.