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Two difficult problems pertain to selection of an evacuation route according to each individualÂ¿s situation. One is constant supervision of the situation of a living space and detection of dangerous situa-tions; the other is detection of residents' respective positions. In this paper, we describe devices and systems for an indoor emergency evacuation using a mobile terminal such as a cell phone or PDA for indoor navigation. The navigation system functions autonomously: the userÂ¿s device receives wireless beacon signals from the surrounding environment and can thereby detect a userÂ¿s position by a mobile terminal independently. In fact, no server-side computation is necessary. Moreover, the system is applicable to an indoor emergency evacuation system using various sensors. The emergency system navigates people to safety in the wake of a disaster. A system must detect all residents' positions and then inform them individu-ally of routes to safety to evacuate all residents to a safe space urgently. We have developed a feasible indoor navigation system that can solve various problems arising in the application layer.