Abstract:
Data integrity in wireless sensor networks (WSN) is very important because incorrect
or missing values could result in the system making suboptimal or catastrophic decisions.
Data imputation allows for a system to counteract the effect of data loss by substituting faulty
or missing sensor values with system-defined virtual values. This paper proposes a virtual sensor
system that uses multi-layer perceptrons (MLP) to impute sensor values in a WSN. The MLP was
trained using a genetic algorithm which efficiently reached an optimal solution for each sensor node.
The system was able to successfully identify and replace physical sensor nodes that were disconnected
from the network with corresponding virtual sensors. The virtual sensors imputed values with very
high accuracies when compared to the physical sensor values.
