Abstract
Tracking moving objects is one of the most common requirements in wireless sensor network applications. Most tracking schemes predict a target’s location based on a single object movement model and periodically activate nearby sensors to monitor the target. However, in most real-world situations, a target exhibits multiple movement patterns. Thus, multiple movement models are required to accurately describe the target’s movement. This paper proposes a tracking framework, called model-based object tracking system (MOTS), that allows a sensor network to adaptively apply the most suitable tracking mechanism to monitor the target under various circumstances. To fairly and accurately evaluate all tracking modules, this study further develops a monitoring-cost evaluator to evaluate the monitoring cost of the inactive tracking modules, and then designs three tracking module selection strategies, the Greedy Strategy, Min-Max Strategy, and Weighted Moving Average Strategy, to select the most effective tracking module to monitor the target in each period. A set of experiments is conducted to evaluate MOTS and compare it against existing tracking systems. The obtained results reveal that the cost efficiency of MOTS is considerably better than that of existing tracking systems.
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Acknowledgments
The authors would like to thank anonymous reviewers for their valuable comments on improving the quality and presentation of the paper. This work was supported by the National Science Council of Taiwan (R.O.C.) under Grants NSC 99-2221-E-218-035 and NSC 98-2221-E-218-036.
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Chen, CC., Liao, CH. Model-based object tracking in wireless sensor networks. Wireless Netw 17, 549–565 (2011). https://doi.org/10.1007/s11276-010-0296-5
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DOI: https://doi.org/10.1007/s11276-010-0296-5