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Article

Local Wireless Sensor Networks Positioning Reliability Under Sensor Failure

1
Department of Mechanical, IT and Aerospace Engineering, Universidad de León, 24071 León, Spain
2
Positioning Department, Drotium, Universidad de León, 24071 León, Spain
*
Authors to whom correspondence should be addressed.
Sensors 2020, 20(5), 1426; https://doi.org/10.3390/s20051426
Received: 31 January 2020 / Revised: 2 March 2020 / Accepted: 3 March 2020 / Published: 5 March 2020
Local Positioning Systems are collecting high research interest over the last few years. Its accurate application in high-demanded difficult scenarios has revealed its stability and robustness for autonomous navigation. In this paper, we develop a new sensor deployment methodology to guarantee the system availability in case of a sensor failure of a five-node Time Difference of Arrival (TDOA) localization method. We solve the ambiguity of two possible solutions in the four-sensor TDOA problem in each combination of four nodes of the system by maximizing the distance between the two possible solutions in every target possible location. In addition, we perform a Genetic Algorithm Optimization in order to find an optimized node location with a trade-off between the system behavior under failure and its normal operating condition by means of the Cramer Rao Lower Bound derivation in each possible target location. Results show that the optimization considering sensor failure enhances the average values of the convergence region size and the location accuracy by 31% and 22%, respectively, in case of some malfunction sensors regarding to the non-failure optimization, only suffering a reduction in accuracy of less than 5% under normal operating conditions. View Full-Text
Keywords: cramer rao lower bound; localization; LPS; multi-objective optimization; sensor failure; wireless sensor networks cramer rao lower bound; localization; LPS; multi-objective optimization; sensor failure; wireless sensor networks
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MDPI and ACS Style

Díez-González, J.; Álvarez, R.; Prieto-Fernández, N.; Perez, H. Local Wireless Sensor Networks Positioning Reliability Under Sensor Failure. Sensors 2020, 20, 1426. https://doi.org/10.3390/s20051426

AMA Style

Díez-González J, Álvarez R, Prieto-Fernández N, Perez H. Local Wireless Sensor Networks Positioning Reliability Under Sensor Failure. Sensors. 2020; 20(5):1426. https://doi.org/10.3390/s20051426

Chicago/Turabian Style

Díez-González, Javier, Rubén Álvarez, Natalia Prieto-Fernández, and Hilde Perez. 2020. "Local Wireless Sensor Networks Positioning Reliability Under Sensor Failure" Sensors 20, no. 5: 1426. https://doi.org/10.3390/s20051426

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