Online fusion of incremental learning for wireless sensor networks

H.H.W.J. Bosman, G. Iacca, H.J. Wörtche, A. Liotta

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

10 Citations (Scopus)
2 Downloads (Pure)

Abstract

Ever-more ubiquitous embedded systems provide us with large amounts of data. Performing analysis close to the data source allows for data reduction while giving information when unexpected behavior (i.e. \emph{anomalies} in the system under observation) occurs. This work presents a novel approach to online anomaly detection, based on an ensemble of classifiers that can be executed on distributed embedded systems. We consider both single and multi-dimensional input classifiers that are based on prediction errors. Predictions of single-dimensional time series input come from either a linear function model or general statistics over a data window. Multi-dimensional input stems from current and historical sensor values as well as predictions. We combine the classifier outputs in the ensemble using a heuristic method and Fisher's combined probability test. The proposed framework is tested thoroughly using synthetic and real-world data. The results are compared to known methods for anomaly detection on limited-resource systems. While individual classifiers perform comparably to known methods, our results show that using an ensemble of classifiers increases the overall detection of anomalies considerably.
Original languageEnglish
Title of host publication2014 IEEE International Conference on Data Mining Workshop (ICDMW), December 14, 2014, Shenzhen, China
Place of PublicationPiscataway
PublisherInstitute of Electrical and Electronics Engineers
Pages525-532
ISBN (Print)978-1-4799-4274-9/14
DOIs
Publication statusPublished - 2014

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