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Erschienen in:
2011 | OriginalPaper | Buchkapitel
Learning Time-Based Presence Probabilities
verfasst von : John Krumm, A. J. Bernheim Brush
Erschienen in: Pervasive Computing
Verlag: Springer Berlin Heidelberg
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Many potential pervasive computing applications could use predictions of when a person will be at a certain place. Using a survey and GPS data from 34 participants in 11 households, we develop and test algorithms for predicting when a person will be at home or away. We show that our participants’ self-reported home/away schedules are not very accurate, and we introduce a probabilistic home/away schedule computed from observed GPS data. The computation includes smoothing and a soft schedule template. We show how the probabilistic schedule outperforms both the self-reported schedule and an algorithm based on driving time. We also show how to combine our algorithm with the best part of the drive time algorithm for a slight boost in performance.