Trajectory Data Reduction in Wireless Sensor Networks

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Oliviu Ghica
Goce Trajcevski
Ouri Wolfson
Ugo Buy
Peter Scheuermann
Fan Zhou
Dennis Vaccaro

Abstract

This work addresses the problem of balancing the trade-off between the energy cost due to communication and the accuracy of the tracking-based trajectories detection and representation in Wireless Sensor Networks (WSNs) settings. We consider some of the approaches used by the Moving Objects Databases (MOD) and Computational Geometry (CG) communities, and we demonstrate that with appropriate adaptation, they can yield significant benefits in terms of energy savings and, consequently, lifetime of a given WSN. Towards that, we developed distributed variations of three approaches for spatio-temporal data reduction − two heuristics (Dead-Reckoning and the Douglas-Peuker algorithm), and a variant of a CG-based optimal algorithm for polyline reduction. In addition, we examine different policies for managing the buffer used by the individual tracking nodes for storing the partial trajectory data. Lastly, we investigated the potential benefits of combining the different data-reduction approaches into " hybrid " ones during tracking of a particular object's trajectory. Our experiments demonstrate that the proposed methodologies can significantly reduce the network-wide energy expenses due to communication and increase the network lifetime.

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How to Cite
Oliviu Ghica, Goce Trajcevski, Ouri Wolfson, Ugo Buy, Peter Scheuermann, Fan Zhou, & Dennis Vaccaro. (2010). Trajectory Data Reduction in Wireless Sensor Networks. International Journal of Next-Generation Computing, 1(1), 28–51. https://doi.org/10.47164/ijngc.v1i1.4

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