Purpose of Research
The aim of this research project is to construct a wide-area sensor network that interprets users’ abstract sensing demands. The network then finds the sensors that hold the data which satisfies the demand, mashes up the collected data within the network along with useful information from other systems, and finally enables the user’s terminal to display it in real time. The sensor network itself has an environmental adaptability that allows each sensor node to consider its surroundings and the user-issued requests, and which will then dynamically change its role to actively acquire the desired sensing data autonomously.
Overview of Research and Development
We focus on the development of the following two technologies, and construct a disaster site monitoring system by combining them. (See figure at right.)
(1) Demand Addressable Network: Technology that transmits user requests (demands) to appropriate sensors, combines sufficient amounts of called-for data from these sensors with other relevant information, and then provides the resultant data to the user.
(2) Environmental Adaptive Wireless Sensor Network: Wireless sensor network comprised of sensor nodes that can dynamically change their respective roles in accordance with changes in the environment and user requests.
Expected Research Results and Social Significance
The goal of this research is to give sensor nodes the capability to dynamically change their behavior in response to user requests to actively take desired environmental information. This is the very opposite of the conventional sensor network data collection method, which merely distributes acquired data. In a large-scale sensor network, which has an enormous amount of sensing data, the capability to dynamically change the sensor’s behavior allows for the efficient acquisition of desired data.