Document Type

Journal Article

Department/Unit

Department of Computer Science

Title

Range-based skyline queries in mobile environments

Language

English

Abstract

Skyline query processing for location-based services, which considers both spatial and nonspatial attributes of the objects being queried, has recently received increasing attention. Existing solutions focus on solving point- or line-based skyline queries, in which the query location is an exact location point or a line segment. However, due to privacy concerns and limited precision of localization devices, the input of a user location is often a spatial range. This paper studies a new problem of how to process such range-based skyline queries. Two novel algorithms are proposed: one is index-based (I-SKY) and the other is not based on any index (N-SKY). To handle frequent movements of the objects being queried, we also propose incremental versions of I-SKY and N-SKY, which avoid recomputing the query index and results from scratch. Additionally, we develop efficient solutions for probabilistic and continuous range-based skyline queries. Experimental results show that our proposed algorithms well outperform the baseline algorithm that adopts the existing line-based skyline solution. Moreover, the incremental versions of I-SKY and N-SKY save substantial computation cost, especially when the objects move frequently. © 2012 IEEE.

Keywords

Location-based services, moving objects, query processing, skyline queries

Publication Date

2013

Source Publication Title

IEEE Transactions on Knowledge and Data Engineering

Volume

25

Issue

4

Start Page

835

End Page

849

Publisher

Institute of Electrical and Electronics Engineers

DOI

10.1109/TKDE.2011.229

Link to Publisher's Edition

http://dx.doi.org/10.1109/TKDE.2011.229

ISSN (print)

10414347

ISSN (electronic)

15582191

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