Abstract-With the increase in the number of elderly people, a guidance system that can be used for medical examination in hospitals becomes to attract attention. As a position estimation technology for indoor guidance, a Wi-Fi positioning system has been studied. However, Wi-Fi radio waves are not available in the hospitals because that affect operations of medical equipment. In this paper, we propose a new realtime indoor guidance system using Personal Handy-phone System (PHS) and Android device for visitors in hospitals. Our proposed system utilizes a combination of Received Signal Strength Indication (RSSI) of PHS and Dead Reckoning based on sensors of an Android device in order to estimate a user's indoor position without affecting operation of medical equipment. Through the experimental evaluation, we have clarified that the proposed system has successfully guided subjects to the destinations with accuracy of 93.3[%].

In this paper, we propose a new real-time guidance system which is equipped with an indoor positioning technology for visitors in hospitals. In order to estimate a user's position without affecting operation of medical equipment, our proposed system utilizes a combination of RSSI of Personal Handy-phone System (PHS) and DeadReckoning based on sensors of an Android device. As a first step of the study, feasibility of indoor RSSI of PHS and sensors of the Android device for the position estimating is evaluated. Through the evaluation, we have clarified that the position estimation of the user is possible by confirming the RSSI of signals transmitted from multiple PHS base stations, and a gyroscope of the Android device can be utilized to detect moving direction of the user.