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Sensors 2010, 10(4), 3100-3125; doi:10.3390/s100403100

Energy-aware Scheduling of Surveillance in Wireless Multimedia Sensor Networks

State Key Laboratory of Precision Measurement Technology and Instrument, Department of Precision Instruments, Tsinghua University, Beijing 100084, China
Author to whom correspondence should be addressed.
Received: 3 February 2010 / Revised: 8 March 2010 / Accepted: 24 March 2010 / Published: 31 March 2010
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Wireless sensor networks involve a large number of sensor nodes with limited energy supply, which impacts the behavior of their application. In wireless multimedia sensor networks, sensor nodes are equipped with audio and visual information collection modules. Multimedia contents are ubiquitously retrieved in surveillance applications. To solve the energy problems during target surveillance with wireless multimedia sensor networks, an energy-aware sensor scheduling method is proposed in this paper. Sensor nodes which acquire acoustic signals are deployed randomly in the sensing fields. Target localization is based on the signal energy feature provided by multiple sensor nodes, employing particle swarm optimization (PSO). During the target surveillance procedure, sensor nodes are adaptively grouped in a totally distributed manner. Specially, the target motion information is extracted by a forecasting algorithm, which is based on the hidden Markov model (HMM). The forecasting results are utilized to awaken sensor node in the vicinity of future target position. According to the two properties, signal energy feature and residual energy, the sensor nodes decide whether to participate in target detection separately with a fuzzy control approach. Meanwhile, the local routing scheme of data transmission towards the observer is discussed. Experimental results demonstrate the efficiency of energy-aware scheduling of surveillance in wireless multimedia sensor network, where significant energy saving is achieved by the sensor awakening approach and data transmission paths are calculated with low computational complexity.
Keywords: wireless multimedia sensor networks; energy-aware scheduling; target tracking wireless multimedia sensor networks; energy-aware scheduling; target tracking

This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Wang, X.; Wang, S.; Ma, J.; Sun, X. Energy-aware Scheduling of Surveillance in Wireless Multimedia Sensor Networks. Sensors 2010, 10, 3100-3125.

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