Evaluating next cell predictors with extensive Wi-Fi mobility data


Libo Song, David Kotz, Ravi Jain, and Xiaoning He. Evaluating next cell predictors with extensive Wi-Fi mobility data. IEEE Transactions on Mobile Computing, volume 5, number 12, pages 1633–1649. IEEE, December 2006. doi:10.1109/TMC.2006.185. ©Copyright IEEE. Revision of song:predict-tr.


Location is an important feature for many applications, and wireless networks can better serve their clients by anticipating client mobility. As a result, many location predictors have been proposed in the literature, though few have been evaluated with empirical evidence. This paper reports on the results of the first extensive empirical evaluation of location predictors, using a two-year trace of the mobility patterns of over 6,000 users on Dartmouth’s campus-wide Wi-Fi wireless network. The surprising results provide critical evidence for anyone designing or using mobility predictors.

We implemented and compared the prediction accuracy of several location predictors drawn from four major families of domain-independent predictors, namely Markov-based, compression-based, PPM, and SPM predictors. We found that low-order Markov predictors performed as well or better than the more complex and more space-consuming compression-based predictors.

Citable with [BibTeX]

Projects: [mobility-models]

Keywords: [wifi]

Available from the publisher: [DOI]

Available from the author: [bib]
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[Kotz research]