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A Novel Index Method for K Nearest Object Query over Time-Dependent Road Networks
Joint Authors
Yang, Yajun
Li, Hanxiao
Wang, Junhu
Hu, Qinghua
Wang, Xin
Leng, Muxi
Source
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-18, 18 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-02-24
Country of Publication
Egypt
No. of Pages
18
Main Subjects
Abstract EN
K nearest neighbor ( k NN) search is an important problem in location-based services (LBS) and has been well studied on static road networks.
However, in real world, road networks are often time-dependent; i.e., the time for traveling through a road always changes over time.
Most existing methods for k NN query build various indexes maintaining the shortest distances for some pairs of vertices on static road networks.
Unfortunately, these methods cannot be used for the time-dependent road networks because the shortest distances always change over time.
To address the problem of k NN query on time-dependent road networks, we propose a novel voronoi-based index in this paper.
Furthermore, we propose a novel balanced tree, named V - t r e e , which is a secondary level index on voronoi-based index to make our querying algorithm more efficient.
Moreover, we propose an algorithm for preprocessing time-dependent road networks such that the waiting time is not necessary to be considered.
We confirm the efficiency of our method through experiments on real-life datasets.
American Psychological Association (APA)
Yang, Yajun& Li, Hanxiao& Wang, Junhu& Hu, Qinghua& Wang, Xin& Leng, Muxi. 2019. A Novel Index Method for K Nearest Object Query over Time-Dependent Road Networks. Complexity،Vol. 2019, no. 2019, pp.1-18.
https://search.emarefa.net/detail/BIM-1131946
Modern Language Association (MLA)
Yang, Yajun…[et al.]. A Novel Index Method for K Nearest Object Query over Time-Dependent Road Networks. Complexity No. 2019 (2019), pp.1-18.
https://search.emarefa.net/detail/BIM-1131946
American Medical Association (AMA)
Yang, Yajun& Li, Hanxiao& Wang, Junhu& Hu, Qinghua& Wang, Xin& Leng, Muxi. A Novel Index Method for K Nearest Object Query over Time-Dependent Road Networks. Complexity. 2019. Vol. 2019, no. 2019, pp.1-18.
https://search.emarefa.net/detail/BIM-1131946
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1131946