An Environmental Monitoring System for Managing Spatiotemporal Sensor Data over Sensor Networks

In a wireless sensor network, sensors collect data about natural phenomena and transmit them to a server in real-time. Many studies have been conducted focusing on the processing of continuous queries in an approximate form. However, this approach is difficult to apply to environmental applications...

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Main Authors: Keun Ho Ryu, Thi Hong Nhan Vu, Su Wook Ha, Yang Koo Lee, Young Jin Jung
Format: Article
Language:English
Published: MDPI AG 2012-03-01
Series:Sensors
Subjects:
Online Access:http://www.mdpi.com/1424-8220/12/4/3997/
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author Keun Ho Ryu
Thi Hong Nhan Vu
Su Wook Ha
Yang Koo Lee
Young Jin Jung
author_facet Keun Ho Ryu
Thi Hong Nhan Vu
Su Wook Ha
Yang Koo Lee
Young Jin Jung
author_sort Keun Ho Ryu
collection DOAJ
description In a wireless sensor network, sensors collect data about natural phenomena and transmit them to a server in real-time. Many studies have been conducted focusing on the processing of continuous queries in an approximate form. However, this approach is difficult to apply to environmental applications which require the correct data to be stored. In this paper, we propose a weather monitoring system for handling and storing the sensor data stream in real-time in order to support continuous spatial and/or temporal queries. In our system, we exploit two time-based insertion methods to store the sensor data stream and reduce the number of managed tuples, without losing any of the raw data which are useful for queries, by using the sensors’ temporal attributes. In addition, we offer a method for reducing the cost of the join operations used in processing spatiotemporal queries by filtering out a list of irrelevant sensors from query range before making a join operation. In the results of the performance evaluation, the number of tuples obtained from the data stream is reduced by about 30% in comparison to a naïve approach, thereby decreasing the query execution time.
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spelling doaj.art-15c0be79a4e24d1e88d9a5d52a0c21fa2022-12-22T04:27:19ZengMDPI AGSensors1424-82202012-03-011243997401510.3390/s120403997An Environmental Monitoring System for Managing Spatiotemporal Sensor Data over Sensor NetworksKeun Ho RyuThi Hong Nhan VuSu Wook HaYang Koo LeeYoung Jin JungIn a wireless sensor network, sensors collect data about natural phenomena and transmit them to a server in real-time. Many studies have been conducted focusing on the processing of continuous queries in an approximate form. However, this approach is difficult to apply to environmental applications which require the correct data to be stored. In this paper, we propose a weather monitoring system for handling and storing the sensor data stream in real-time in order to support continuous spatial and/or temporal queries. In our system, we exploit two time-based insertion methods to store the sensor data stream and reduce the number of managed tuples, without losing any of the raw data which are useful for queries, by using the sensors’ temporal attributes. In addition, we offer a method for reducing the cost of the join operations used in processing spatiotemporal queries by filtering out a list of irrelevant sensors from query range before making a join operation. In the results of the performance evaluation, the number of tuples obtained from the data stream is reduced by about 30% in comparison to a naïve approach, thereby decreasing the query execution time.http://www.mdpi.com/1424-8220/12/4/3997/wireless sensor networksenor data streamspatiotemporal continuous query processingdata stream management system
spellingShingle Keun Ho Ryu
Thi Hong Nhan Vu
Su Wook Ha
Yang Koo Lee
Young Jin Jung
An Environmental Monitoring System for Managing Spatiotemporal Sensor Data over Sensor Networks
Sensors
wireless sensor network
senor data stream
spatiotemporal continuous query processing
data stream management system
title An Environmental Monitoring System for Managing Spatiotemporal Sensor Data over Sensor Networks
title_full An Environmental Monitoring System for Managing Spatiotemporal Sensor Data over Sensor Networks
title_fullStr An Environmental Monitoring System for Managing Spatiotemporal Sensor Data over Sensor Networks
title_full_unstemmed An Environmental Monitoring System for Managing Spatiotemporal Sensor Data over Sensor Networks
title_short An Environmental Monitoring System for Managing Spatiotemporal Sensor Data over Sensor Networks
title_sort environmental monitoring system for managing spatiotemporal sensor data over sensor networks
topic wireless sensor network
senor data stream
spatiotemporal continuous query processing
data stream management system
url http://www.mdpi.com/1424-8220/12/4/3997/
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