Construction of wireless ad hoc network for Lifelog based physical and informational support system

In this paper, we constructed wireless ad hoc network for realizing various physical and informational support systems based on Lifelog that is the records of experiences in the daily life, and realized a prototype of electric appliances operational support system which is one of useful systems. Utilization of Lifelog reduces the burden for controlling a huge amount of convoluted electric appliances by constructing the probabilistic model of user´s operational behavior based on Lifelog and predicting user´s successive operations with this model. In this time, Lifelog accumulates user´s operational behavior for electric appliances and environmental information through the wireless network. For the basis of collecting Lifelog including operational behavior, we made a portable Bluetooth-equipped device for wireless network which is necessary to communicate information in the ubiquitous computing environment because Bluetooth has good features such as the ad hoc networking function, sufficient data throughput, high resistance to noise and low power consumption. The realized device has abundant 110 connectors which are able to connect various sensors and actuators. By attaching these devices to electric appliances, they can easily participate in the wireless network and communicate information. Therefore the system can probabilistically model user´s behavior, especially operations for electric appliances using Lifelog as training data, and predicts the user´s next successive operations for surrounding appliances utilizing this model and the user´s present state. The system gives prediction results to the user and executes operations via the wireless network after the user´s confirmation. The various experimental results prove that the operational system in ubiquitous computing environment is useful and our realized device is sufficient performance in the daily life.