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Hybrid data and decision fusion techniques for model-based data gathering in wireless sensor networks [environmental monitoring applications]

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3 Author(s)
Rossi, L.A. ; Dept. of Electr. Eng., Univ. of Southern California, Los Angeles, CA, USA ; Krishnamachari, B. ; Kuo, C.-C.J.

The data gathering problem in wireless sensor networks for environmental monitoring, where the physical phenomena can be modeled by partial differential equations (PDEs), is investigated. In this context, it suffices for the sensor network to update the base station with estimates of model parameters rather than transmitting raw sensor measurements. In-network processing techniques to estimate the PDE coefficients are presented. A scheme that provides a hybrid combination of decision and data fusion is proposed to find a tradeoff between performance and energy efficiency. The role that the assumptions of PDE models can play in designing such methods is investigated.

Published in:

Vehicular Technology Conference, 2004. VTC2004-Fall. 2004 IEEE 60th  (Volume:7 )

Date of Conference:

26-29 Sept. 2004