Energy Efficient Data Aggregation in Cognitive Sensor Networks

In this paper, a protocol for energy efficient data aggregation process is proposed. A virtual infrastructure is considered where the entire geographical area of interest is divided into grid based clusters having a representative member in each of the cluster. The output from the sensors is made to pass through a context aware system to ensure the validity of the sensor data. Redundancy in the above valid data can be of two types – Intra cluster and Inter Cluster. Based on the type of redundancy, redundancy elimination is performed at header nodes or at intermediate nodes thus facilitating energy efficient aggregation of data from source node to sink.

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