Abstract :
Summary form only given, as follows. Although there a lot of research and improvement in electromechanical and performance aspects of WSN sensor devices and communication protocols but its integration with some well defied software framework and data dissemination and analysis is still a challenge. GSN (for Global Sensor Networks) is a software project that started in 2005 at EPFL in the LSIR Lab. The initial goal was to provide a reusable software platform for the processing of data streams generated by wireless sensor networks. The project was successful, and was later reoriented towards a generic stream processing platform. GSN acquires data, lters it with an intuitive, enriched SQL syntax, runs customisable algorithms on the results of the query, and outputs the generated data with its notication subsystem.