2019 年 23 巻 1 号 p. 1-8
Waiting lines are an everyday occurrence in various places. In this paper, we propose a waiting line and waiting time estimation method based on crowd behavior characteristics. The crowd behavior characteristics in a waiting line concern the user actions, where users are either moving or stationary. The proposed method considers the following three types of user movement using the receive signal strength indicator (RSSI) and user action estimated by an acceleration sensor: the user movement of entering the waiting line, the user movement following the crowd behavior characteristic while lining up in the waiting line, and the user movement of leaving the waiting line. Using these movements, the proposed method estimates the waiting line and waiting time. Through experiments, we obtained 95.0% estimation accuracy in the waiting line estimation, so we could mostly distinguish people in a waiting line from those outside. In addition, we obtained a mean estimation error of 2.0 s in the waiting time estimation, so we could obtain the waiting time with high accuracy.