Increasing network lifetime in an energy-constrained wireless sensor network
by Said El Abdellaoui; Mérouane Debbah; Youssef Fakhri; Driss Aboutajdine
International Journal of Sensor Networks (IJSNET), Vol. 13, No. 1, 2013

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.

Online publication date: Tue, 19-Mar-2013

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