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In this paper we present a new approach to reduce the amount of required data transfers in wireless sensor networks by distributed in-network processing of spatial sensor data. The measurements of local clusters are described by a model consisting of a set of Virtual Sensors (V S). Quasi optimal positions of the VS in-between real sensors are calculated on sensor nodes, which act as cluster heads...
Wireless sensor networks are an important tool for the supervision of cool chains. Previous research with a high number of measurement points revealed spatial temperature deviations of more than 5 °C in chilled transport, but the number of sensors has to be reduced to an economically useful value for use in regular transport. This paper presents a method to estimate the minimum number of sensors and...
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