Publication Type

Journal Article

Version

publishedVersion

Publication Date

11-2005

Abstract

Assume a set of moving objects and a central server that monitors their positions over time, while processing continuous nearest neighbor queries from geographically distributed clients. In order to always report up-to-date results, the server could constantly obtain the most recent position of all objects. However, this naïve solution requires the transmission of a large number of rapid data streams corresponding to location updates. Intuitively, current information is necessary only for objects that may influence some query result (i.e., they may be included in the nearest neighbor set of some client). Motivated by this observation, we present a threshold-based algorithm for the continuous monitoring of nearest neighbors that minimizes the communication overhead between the server and the data objects. The proposed method can be used with multiple, static, or moving queries, for any distance definition, and does not require additional knowledge (e.g., velocity vectors) besides object locations.

Keywords

Location-dependent and sensitive, Query processing, Spatial databases, Velocity vectors

Discipline

Databases and Information Systems | Numerical Analysis and Scientific Computing

Publication

IEEE Transactions on Knowledge and Data Engineering

Volume

17

Issue

11

First Page

1451

Last Page

1464

ISSN

1041-4347

Identifier

10.1109/TKDE.2005.172

Publisher

IEEE

Additional URL

http://dx.doi.org/10.1109/TKDE.2005.172

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