WCSE

Update Strategy and Model with Uncertainty of Moving Objects

Abstract— Tracking moving objects is one of the most common requirements for many location-based applications. The location of a moving object changes continuously but the database location of the moving object cannot update continuously. Modelling of such moving object database should be considered to facilitate study of the performance and design parameters for this database feature. Such study is essential for selecting the optimal solution in order to minimize the implementation of the overhead cost. Location updating strategy for such type of database is the most important criteria. Spatio-temporal uncertainty is a special feature of moving objects due to the inability of precisely capturing or predicting their continuously changing locations. In this paper, we proposed a new dynamic threshold location updating strategy. The location updating threshold was given dynamically in accordance with the velocity, azimuth positioning information from the GPS. In addition, a cone model with uncertainty of current unit trajectory was presented based on thresholds. Furthermore, the model was tested through the different moving objects. The experimental results illustrated that the location update frequency can be effectively reduced, and thus the position information transmission flow and the data storage were reduced without affecting the moving objects trajectory precision.

Index Terms— moving objects database, update strategies, uncertainty trajectory, uncertainty threshold

Ya Ban, Haiyan Sun, Xina Wang
School of Geodesy and Geomatics, Wuhan University, CHINA

[Download]

Cite: Ya Ban, Haiyan Sun, Xina Wang, "Update Strategy and Model with Uncertainty of Moving Objects," Proceedings of 2016 6th International Workshop on Computer Science and Engineering, pp. 249-255, Tokyo, 17-19 June, 2016.