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2007
IEEE

Aggregate Threshold Queries in Sensor Networks

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Aggregate Threshold Queries in Sensor Networks
— An important class of queries over sensor networks are network-wide aggregation queries. In this work we study a class of aggregation queries which we refer to as aggregate threshold queries. The goal of an aggregate threshold query is to continuously monitor the network and give a notification every time an aggregated value crosses a predetermined threshold value. Aggregate threshold queries are of particular importance in a wireless sensor environment, since they allow network-wide events to be detected, with a minimum expenditure of energy. Such network-wide events might include, for example, the variance in sensor readings exceeding a certain threshold. We present an efficient algorithm for implementing arbitrary aggregate threshold queries over sensor networks. Our algorithm is based on a novel geometric approach by which an arbitrary aggregate threshold query can be split into a set of numerical constraints on the readings of the individual sensors. These constraints are us...
Izchak Sharfman, Assaf Schuster, Daniel Keren
Added 03 Jun 2010
Updated 03 Jun 2010
Type Conference
Year 2007
Where IPPS
Authors Izchak Sharfman, Assaf Schuster, Daniel Keren
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