Increasing network lifetime in an energy-constrained wireless sensor network

Authors:
Said El Abdellaoui;Mérouane Debbah;Youssef Fakhri;Driss Aboutajdine
Affiliations:
LRIT Laboratory Associate Unit to CNRST URAC 29, Faculty of Sciences, Mohammed V-Agdal University, 4 Avenue Ibn Battouta, B.P 1014 RP, Rabat, Morocco;Alcatel-Lucent Chair on Flexible Radio, SUPELEC Plateau de Moulon 3, rue Joliot-Curie, Bureau 5-24 91192, Gif-sur-Yvette Cedex, France;LARIT Laboratory, équipe Réseaux et Télécommunications, Faculty of Sciences, University Ibn Tofail, B.P 133, Kénitra 14 000, Morocco;LRIT Laboratory Associate Unit to CNRST URAC 29, Faculty of Sciences, Mohammed V-Agdal University, 4 Avenue Ibn Battouta B.P 1014 RP, Rabat, Morocco
Venue:
International Journal of Sensor Networks
Year:
2013

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Abstract

Energy in wireless sensor networks is a scarce resource, therefore an energy-efficient mechanism is required to increase the network lifetime. In this paper, we study the problem of optimal power allocation, taking into account the estimation of the total signal-to-noise ratio at the fusion centre FC. We consider that nodes transmit their data to the fusion centre over quasi-static Rayleigh fading channels. In order to analyse our approach, we first investigate the orthogonal channel case and then the non-orthogonal one introducing a virtual MISO framework communication scheme. We consider in both cases that the nodes have channel state information. Simulations show that the new algorithm introduced provides a network extension lifetime of more than 80% in comparison with other traditional methods.