Abstract
Sensor data are being used for environmental measurement at many research institutes. To exchange sensor data between measurement sites, it is necessary to open sensor data to the Internet with a Web server. However, measurement sites cannot always operate via a Web server because of operational and security issues. Furthermore, support for NAT (Network Address Translation) and many different types of sensors are also needed. For these reasons, we developed a system based on hybrid P2P technology to facilitate exchange of sensor data. We conducted experiments to evaluate the fundamental performance of the system and found that we were able to efficiently search for and obtain sensor data using the system. We were also able to share sensor data via the Internet in an NAT environment without the need to operate a Web server by installing a developed Node function. Furthermore, we implemented a function that allowed the user to easily add different types of sensors.
