On Demand Role Assignment for Event-Detection in Sensor Networks

Authors:
Eduardo F. Nakamura;Horacio A. B. F. de Oliveira;Luciana F. Pontello;Antonio A. F. Loureiro
Affiliations:
Federal University of Minas Gerais, Brazil;Federal University of Minas Gerais, Brazil;Federal University of Minas Gerais, Brazil;Federal University of Minas Gerais, Brazil
Venue:
ISCC '06 Proceedings of the 11th IEEE Symposium on Computers and Communications
Year:
2006

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Abstract

In resource-constrained wireless sensor networks (WSNs), communication protocols need to be energyefficient. In this context, information-fusion techniques have been used to reduce packet transmissions, and role assignment algorithms have been proposed to define which nodes should perform information fusion. However, most of the role assignment algorithms for WSNs are proactive in the sense that roles are assigned even when no event is being detected. In this work, we propose a reactive algorithm that assigns roles only when an event is detected, therefore saving energy during the network inactivity. In addition, to save energy during event notification, our algorithm searches for the shortest paths that maximize data aggregation.