Distance-Based Range Queries over Uncertain Moving Objects within Time Intervals
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    Abstract:

    Aiming at the scenarios that the query issuers and query sender are uncertain moving objects, a new type of queries named DRqTI (Distance-based Range query within a Time Interval) is defined. The DRqTI searches out the target object in the dataset, which satisfies that the distance to the query issuer does not exceed the threshold value in a given time interval. And query results contain the suitability and valid time intervals which satisfy the condition. Three pruning strategies, namely trajectory-based, time-based and distance-based rules are designed. Furthermore, algorithms that integrate the calculation method of refining and matching degree are developed. On this basis, a query processing algorithm is designed. The experimental analysis shows that distance-based method is the best among three methods and the proposed algorithm can deal with DRqTI problem efficiently.

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陈逸菲,王玉芳,赵丽玲,陈慧.时间区间上的不确定移动对象距离范围查询.计算机系统应用,2017,26(2):189-194

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History
  • Received:May 26,2016
  • Revised:July 07,2016
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  • Online: February 15,2017
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