J.Srimathi, Dr.V.Valli Mayil
WSN is an fast growing technology and used in potential applications including Traffic Monitoring, Military applications, robotic etc. In Wireless Sensor Networks (WSNs), energy Conservation is the most important factor because each sensor devices operated with Battery. Such Wireless networks have resource constraints on data communication, computation, and energy Utilization. It is important to join and query the readings generated by group of sensors, because recovering and joining data from thousands of nodes is monotonous and impractical. Sensor nodes needs to process data in such a way that it can generate useful information on spending only affordable amount of energy. Sensors may respond uniquely from conventional Database System. Wireless Sensor Network consists of nodes which are distributed widely. These sensors are data source for data stream processing in many cases. In this paper we discuss on stream based query processing techniques used in DSMS and evaluate continuous queries over data streams.
Data Stream Processing, Optimization Techniques