ALGORITHMS FOR ENERGY EFFICIENT RECONSTRUCTION OF A PROCESS WITH A MULTIHOP WIRELESS SENSOR NETWORK

In this work, a multihop Wireless Sensor Network (WSN) is employed to monitor a field, modeled as a process s(x, y, t). In order to extend the lifetime of the network, we propose two algorithms for energy-efficient reconstruction of the monitored process. The reconstruction of the process is done in sink node, with samples that it receives from each sensor node. Both algorithms explore the variation rate of the field to manage the necessity of communication by sensor nodes, aiming at reducing the amount of transmissions. Furthermore, nodes can sleep between transmissions to save energy. Simulations are done, and results show a significant increase in the network lifetime, compared to a WSN without any energy saving method. The algorithms are evaluated with respect to the reconstruction error of the field being sensed and network lifetime increase.