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Title: An energy-efficient framework for multi-rate query in wireless sensor networksnergy-aware protocol for data gathering applications in wireless sensor networks
Authors: Chen, Y
Leong, HV 
Xu, M
Cao, J 
Chan, KCC 
Chan, ATS 
Issue Date: 2006
Source: CIT 2006 : The 6th IEEE International Conference on Computer and Information Technology : 20-22 September 2006, Seoul, Korea, [p. 7]
Abstract: Minimizing the communication overhead is always a hot topic in wireless sensor networks. In a multi-rate query system, data sources disseminate the data streams to users at the frequency they request. However, sending data in different frequency to individual users is very costly. We address this problem by broadcasting a single consolidated data stream, aiming at reducing the amount of transmitted data. Taking into account the data correlation, we can re-construct the data streams at lower frequencies from the consolidated stream at a higher frequency. In this paper, we propose an energy-efficient framework to process multi-rate queries and investigate rate conversion mechanism. We evaluate both the accuracy and energy efficiency by simulation. Simulation results indicate that with a reasonable level of tolerance, the performance gain is significant. As far as we know, this is the first energy-efficient solution for multi-rate query in wireless sensor networks.
Keywords: Signal processing systems
Computer communication networks
Wireless communication
Programming languages (Electronic computers)
Framework (computer file)
Information systems
Data management
Query processing
Publisher: IEEE
ISBN: 978-076-95-2687-4
Rights: © 2006 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
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