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Chen J.,IEMN IRCICA Lille | Massouri A.,IEMN IRCICA Lille | Clavier L.,IEMN IRCICA Lille | Clavier L.,Telecom Lille 1 | And 3 more authors.
AEU - International Journal of Electronics and Communications | Year: 2012

Indoor heterogeneous wireless sensor networks are considered in this paper. We analyze the power consumption for multihop communications with non-regenerative relays. Since sensor nodes are battery operated, energy consumption is a crucial issue. We determine the optimal relay gains and transmitted power that minimize the dissipated power for a given quality of service in a narrow band fading channel. Our work includes two main contributions: firstly, we study the energy consumption taking into account hardware aspects, especially the relays' efficiency. In an AWGN channel, carefully analyzing the energy gain as a function of the position, we show that relay characteristics have an important impact on the multihop link consumption budget. We then use a Rice channel model based on simulations and further study the hardware impact on energy saving. © 2011 Elsevier GmbH. All rights reserved.

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