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Low energy consumption is a major design constraint for battery operated embedded systems such as wireless sensor networks or WSN. Low energy is more important compared to low power for such systems as it will increase lifetime of the system. The major component which can reduce energy is to reduce delay. WSN motes must power sensors, a processor, and a radio for wireless communication over long periods of time, and are therefore particularly sensitive to energy use. Recent techniques for reducing WSN energy consumption, such as aggregation, require additional computation to reduce the cost of sending data by minimizing radio data transmissions.
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