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Title: In-network execution of monitoring queries in sensor networks
Authors: Yang, X.
Lim, H.B. 
Zsu, T.M.
Tan, K.L. 
Keywords: Self-join queries
Sensor networks
Issue Date: 2007
Citation: Yang, X.,Lim, H.B.,Zsu, T.M.,Tan, K.L. (2007). In-network execution of monitoring queries in sensor networks. Proceedings of the ACM SIGMOD International Conference on Management of Data : 521-532. ScholarBank@NUS Repository.
Abstract: Sensor networks are widely used in many applications for collecting information from the physical environment. In these applications, it is usually necessary to track the relationships between sensor data readings within a time window to detect events of interest. However, it is difficult to detect such events by using the common aggregate or selection queries. We address the problem of processing window self-join in order to detect events of interest. Self-joins are useful in tracking correlations between different sensor readings, which can indicate an event of interest. We propose the Two-Phase Self-Join (TPSJ) scheme to efficiently evaluate self-join queries for event detection in sensor networks. Our TPSJ scheme takes advantage of the properties of the events and carries out data filtering during in-network processing. We discuss TPSJ execution with one window and we extend it for continuous event monitoring. Our experimental evaluation results indicate that the TPSJ scheme is effective in reducing the amount of radio transmissions during event detection. Copyright 2007 ACM.
Source Title: Proceedings of the ACM SIGMOD International Conference on Management of Data
ISBN: 1595936866
ISSN: 07308078
DOI: 10.1145/1247480.1247538
Appears in Collections:Staff Publications

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