Joint optimization of power allocation and relay selection in cooperative wireless sensor networks

Authors:
Hadi Jamali Rad;Mohammad Abdizadeh;Hadi Meshgi;Bahman Abolhassani
Affiliations:
School of Electrical Engineering, Iran University of Science and Technology, Tehran, Iran;School of Electrical Engineering, Sharif University of Technology, Tehran, Iran;School of Electrical Engineering, Iran University of Science and Technology, Tehran, Iran;School of Electrical Engineering, Iran University of Science and Technology, Tehran, Iran
Venue:
ANTS'09 Proceedings of the 3rd international conference on Advanced networks and telecommunication systems
Year:
2009

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Abstract

We study the problem of optimizing the symbol error probability (SEP) performance of cluster-based cooperative wireless sensor networks (WSNs). We propose that to achieve the minimum SEP at the destination, a joint optimization of power allocation and relay selection should be accomplished. To this aim, we reformulate the SEP performance of a simple cluster-based cooperative WSN in the general form and solve the joint optimization problem efficiently. Simulation results demonstrate that the proposed joint optimization can efficiently improve the SEP performance of the network in comparison with the previous disjoint optimal relay selection schemes.