Summary
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Indexing Moving Objects for Trajectory Retrieval on Location-Based Services Duksung LIM Daesoo CHO Bonghee HONG Publication IEICE TRANSACTIONS on Information and Systems Vol.E90-D No.9 pp.1388-1397 Publication Date: 2007/09/01 Online ISSN: 1745-1361 DOI: 10.1093/ietisy/e90-d.9.1388 Print ISSN: 0916-8532 Type of Manuscript: PAPER Category: Database Keyword: moving object, spatio-temporal index, trajectory query, Full Text: PDF(2MB)>>
Summary: 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. | ||||||||||
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