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[Keyword] trajectory query(1hit)

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  • Indexing Moving Objects for Trajectory Retrieval on Location-Based Services

    Duksung LIM  Daesoo CHO  Bonghee HONG  

     
    PAPER-Database

      Vol:
    E90-D No:9
      Page(s):
    1388-1397

    Due to the continuous growth of wireless communication technology and mobile equipment, the history management of moving object is important in a wide range of location-based applications. To process queries for history data, trajectories, we generally use trajectory-preserving index schemes based on the trajectory preservation property. This property means that a leaf node only contains segments belonging to a particular trajectory, regardless of the spatiotemporal locality of segments. The sacrifice of spatiotemporal locality, however, causes the index to increase the dead space of MBBs of non-leaf nodes and the overlap between the MBBs of nodes. Therefore, an index scheme for trajectories shows good performance with trajectory-based queries, but not with coordinate-based queries, such as range queries. We propose new index schemes that improve the performance of range queries without reducing performance with trajectory based queries.