Open AccessContinuous Monitoring in Wireless Sensor Networks: A Fuzzy-Probabilistic Approach
Author(s) -
Flávio R. S. Nunes,
José Everardo Bessa Maia
Publication year - 2019
Language(s) - English
Resource type - Conference proceedings
DOI - 10.5753/eniac.2019.9275
Subject(s) - wireless sensor network , probabilistic logic , computer science , sensor node , fuzzy logic , node (physics) , mean squared error , interpolation (computer graphics) , real time computing , algorithm , data mining , key distribution in wireless sensor networks , mathematics , wireless network , wireless , statistics , artificial intelligence , engineering , computer network , telecommunications , motion (physics) , structural engineering
This work presents and evaluates a fuzzy-probabilistic strategy to save energy in Wireless Sensor Networks (WSNs). The energy savings are obtained with the sensor nodes, no longer sensing and transmitting measurements. In this simple strategy, in each epoch each sensor node transmits its measurement with probability p, and does not transmit with probability (1 p), does not correlate with that of any other sensor node. The task at the sink node, which is to estimate the sensor field at non-sensed points, is solved using fuzzy inference to impute the non-transmitted data followed by regression or interpolation of the sensed scalar field. In this, Nadaraya-Watson regression, regression with Fuzzy Inference and Radial Base Functions Interpolation are compared. The compromise curve between the value of p and the accuracy of the sensor field estimation measured by root mean square error (RMSE) is investigated. When compared to a published linear prediction strategy of the literature, the results show a small loss of performance versus the great simplification of the procedure in the sensor node, making it advantageous in applications that require extremely simple network nodes.