The catastrophic earthquake and Tsunami of Tohoku Japan in 2011, caused colossal damages to the ground infrastructures that resulted in the lost of means to acquire and to convey information between rescues and victims of disaster. This unfortunate situation of helplessness prompted us to propose in this paper a reliable means to recover a function of telecom infrastructure immediately by use of portable satellite phone with narrow band. The proposed system consists of sharing Internet access through satellite phone among multiple users and protocol conversion to improve the degraded performance caused by long-latency over satellite communication. The protocol conversion from application protocol like HTTP (Hypertext Transfer Protocol) over TCP (Transmission Control Protocol) to batch-oriented reliable protocol with forward error collection is presented. Through the implementation, we shows that the satellite communication is stabilized even in narrow band and it can be shared among many disaster victims.

The presented study aims to provide for a generally higher level of safety for people in hazardous situations by using an agent-based intelligent adaptive system. A design of a software system for the prevention of earthquake secondary disasters is presented. The proposed system is to control consumer electronics and other potentially dangerous equipment in a household, and also to guide evacuation of the inhabitants. The system utilizes three types of control rules: general, family-related, and specialized for each type of consumer electronics. As there can often be operational conflicts if applying the rules simultaneously, a conflict-resolving mechanism is implemented, based on an optimization algorithm for weighted constraint satisfaction problems. The system operation is explained, and its prototype is developed. The prototype is used in a pilot study and also in a simulation experiment. The obtained results demonstrate the feasibility and potential usefulness of the proposed design solutions.