Paper Info
Title
An environmental monitoring system for managing spatiotemporal sensor data over sensor networks.
Abstract
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 naive approach, thereby decreasing the query execution time.
Year
DOI
Venue
2012
10.3390/s120403997
SENSORS
Keywords
Field
DocType
wireless sensor network,senor data stream,spatiotemporal continuous query processing,data stream management system
Data mining,Data stream management system,Data stream mining,Data stream,Tuple,Computer science,Visual sensor network,Filter (signal processing),Raw data,Real-time computing,Wireless sensor network
Journal
Volume
Issue
ISSN
12
4.0
1424-8220
Citations 
PageRank 
References 
3
0.42
15
Authors
5
Name
Order
Citations
PageRank
Su Wook Ha130.42
Yang Koo Lee230.42
Thi Hong Nhan Vu330.42
Young Jin Jung430.42
Keun Ho Ryu5814.39