A Data-driven Architecture for Remote Control of Sensors over a Wireless Sensor Network and the Internet

Abstract

This study revealed an applicable architecture in which a data-driven mechanism was designed to bridge a wireless sensor network (WSN) and the Internet. The system was divided into two independent parts. The first part is the data communication between the sensor network and the database. The other part is the data communication between the database and the user interface (UI). These two parts are connected by the database server. Asynchronous interoperation was introduced while exchanging data between these two parts. Users were not allowed to control the sensors through direct connection to the sensors and can only use the Web service to update the sensor profile built in the database. The sensors were triggered to start the action through a data-update event from the database. A sensor profile built in the database collected all sensor information and all user control command. For the information to be centralized and triggered by the database, regardless of whether sensors were measured in a periodic sampling or an event-driven environment, all sensor actions were triggered through a data-update event in the database. For the sake of improving user experience, a Web-based UI was implemented using scalable vector graphics (SVG) and Ajax technologies. All operations by users were conducted through the Hypertext Transfer Protocol (HTTP) standard method. Therefore, this system can be used via a browser and easily deployed. The proposed architecture is suitable for a healthcare system, a personal body area network, and the Intranet for control.