Sensing and Wireless technology has evolved to the point where hundreds of tiny, battery-powered sensors are deployed for monitoring applications that continuously collect data about its surroundings. These sensors need to process the data which it collects into data streams to be fed into a database, and this is where network connecting the sensors comes into play. The very aspect of mobility and low setup cost makes wireless sensor networks easier to implement than the wired ones. The query processing in wireless sensor networks deals with the query and information retrievation of data to and from the sensor nodes to the user ends. Now as we know, we have a network and routing layer that allow us to communicate with any node in the network, we will look at how data streams or tuples are processed within the network. Each data stream in the network is labeled with a unique identifier. Data streams are created by the actual sensors collecting data and by operators in the network. The query processor module is responsible for delivering the tuples to the correct operator and node. The paper discusses all these processing along with the architecture of the query processor.

Full text: IJEIR_737_Final.pdf