Secure pattern based aggregation using query processing algorithm in wireless sensor networks

Data aggregation is the technique used togather the sensor data to reduce the duplicate data transmission. It is an effectual approach for Wireless Sensor Networks (WSNs) to save energy and prolong network life time. Existing Reliable Spatial Window Aggregation (RESA) query processing algorithm proposed to reduce packet loss rate during data communication and balance the load of nodes. The main problem in existing system is the single node act as the cluster head at every transmission so it takes more energy than the sensor nodes and the duplicate data can be stored at the cluster head. In order to address this problem, a Pattern Based Aggregation using query processing algorithm called PBA is proposed. PBA only requires each node to maintain location of its neighbours. According to the information it divides the query area into several sub regions followed by collection of sensor readings in each sub region. It is proposed to reduce the transmission of duplicate data during communication. An Oscilloscope measurement technique is proposed to measure the energy level of the sensor node.