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Sensors 2015, 15(9), 24143-24177; doi:10.3390/s150924143

Evaluation of Content-Matched Range Monitoring Queries over Moving Objects in Mobile Computing Environments

1
College of Information and Communication Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon 440-746, Korea
2
Mobile Communications Division, Samsung Electronics Co., Ltd., 416 Maetan-dong, Youngtong-gu, Suwon 443-742, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Leonhard Reindl
Received: 23 July 2015 / Revised: 7 September 2015 / Accepted: 16 September 2015 / Published: 18 September 2015
(This article belongs to the Section Sensor Networks)
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Abstract

A content-matched (CM) rangemonitoring query overmoving objects continually retrieves the moving objects (i) whose non-spatial attribute values are matched to given non-spatial query values; and (ii) that are currently located within a given spatial query range. In this paper, we propose a new query indexing structure, called the group-aware query region tree (GQR-tree) for efficient evaluation of CMrange monitoring queries. The primary role of the GQR-tree is to help the server leverage the computational capabilities of moving objects in order to improve the system performance in terms of the wireless communication cost and server workload. Through a series of comprehensive simulations, we verify the superiority of the GQR-tree method over the existing methods. View Full-Text
Keywords: range monitoring query; moving object; query indexing; location sensing; location-update stream; location-based service; mobile/ubiquitous computing range monitoring query; moving object; query indexing; location sensing; location-update stream; location-based service; mobile/ubiquitous computing
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Jung, H.; Song, M.; Youn, H.Y.; Kim, U.M. Evaluation of Content-Matched Range Monitoring Queries over Moving Objects in Mobile Computing Environments. Sensors 2015, 15, 24143-24177.

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