A Tracking System using Location Prediction and Dynamic Threshold for Minimizing SMS Delivery

A Tracking System using Location Prediction and Dynamic Threshold for Minimizing SMS Delivery
Authors:BIRAJDAR SAMEER LALSAHEB, G. SOBHA

Abstract: In this paper, a novel method called location-based delivery (LBD), which combines the short message service (SMS) and global position system (GPS), is proposed, and further, a realistic system for tracking a target’s movement is developed. LBD reduces the number of short message transmissions while maintaining the location tracking accuracy within the acceptable range. The pro-posed approach, LBD, consists of three primary features: Short message format, location prediction, and dynamic threshold. The defined short message format is proprietary. Location prediction is performed by using the current location, moving speed, and bearing of the target to predict its next location. When the distance between the predicted location and the actual location exceeds a certain threshold, the target transmits a short message to the tracker to update its current location. The threshold is dynamically adjusted to maintain the location tracking accuracy and the number of short messages on the basis of the moving speed of the target. The experimental results show that LBD, indeed, outperforms other methods because it satisfactorily maintains the location tracking accuracy with relatively fewer messages. 

Keywords: Global Positioning System (GPS), Location Tracking, Mobile Phones, Prediction Algorithms, Short Message Service (SMS).

 INTRODUCTION 

             The global position system (GPS) has become a common functionality in handheld devices, and therefore, several location-tracking applications have been developed [2]– [15], including continuous location- tracking of elders and children for safety reasons or to prevent them from being lost [2], [3], car monitoring and tracking [4]–[6], and intelligent transportation systems [7]. The GPS is used to obtain the location information of a tar-get (e.g., a mobile device). However, most of the above-cited works used either an 802.11 wireless network or the short message service (SMS) to transmit the location information of a target to a tracker. For example, Lee et al. proposed a real-time location tracking system [2] for childcare or elderly care applications. It transmits the location information of the mobile device to a central GPS application server through the 802.11 wireless networks. This application allows the server to simultaneously monitor multiple targets (e.g., elders or children).  

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