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Context-Based Moving Object Trajectory Uncertainty Reduction and Ranking in Road Network

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Abstract

To support a large amount of GPS data generated from various moving objects, the back-end servers usually store low-sampling-rate trajectories. Therefore, no precise position information can be obtained directly from the back-end servers and uncertainty is an inherent characteristic of the spatio-temporal data. How to deal with the uncertainty thus becomes a basic and challenging problem. A lot of researches have been rigidly conducted on the uncertainty of a moving object itself and isolated from the context where it is derived. However, we discover that the uncertainty of moving objects can be efficiently reduced and effectively ranked using the context-aware information. In this paper, we focus on contextaware information and propose an integrated framework, Context-Based Uncertainty Reduction and Ranking (CURR), to reduce and rank the uncertainty of trajectories. Specifically, given two consecutive samplings, we aim to infer and rank the possible trajectories in accordance with the information extracted from context. Since some context-aware information can be used to reduce the uncertainty while some context-aware information can be used to rank the uncertainty, to leverage them accordingly, CURR naturally consists of two stages: reduction stage and ranking stage which complement each other. We also implement a prototype system to validate the effectiveness of our solution. Extensive experiments are conducted and the evaluation results demonstrate the efficiency and high accuracy of CURR.

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Authors and Affiliations

  1. School of Computer Science, Beijing University of Technology, Beijing, 100124, China

    Jian Dai & Zhi-Ming Ding

  2. University of Chinese Academy of Sciences, Beijing, 100049, China

    Jian Dai

  3. Institute of Software, Chinese Academy of Sciences, Beijing, 100190, China

    Jian Dai

  4. School of Computer Science and Technology, Soochow University, Suzhou, 215000, China

    Jia-Jie Xu

Authors
  1. Jian Dai
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  2. Zhi-Ming Ding
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  3. Jia-Jie Xu
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Correspondence to Zhi-Ming Ding.

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Dai, J., Ding, ZM. & Xu, JJ. Context-Based Moving Object Trajectory Uncertainty Reduction and Ranking in Road Network. J. Comput. Sci. Technol. 31, 167–184 (2016). https://doi.org/10.1007/s11390-016-1619-5

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  • DOI: https://doi.org/10.1007/s11390-016-1619-5

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