In-train Congestion Estimation Using Wireless Ad Hoc Networks

The in-train congestion estimation methods currently introduced in Japan have problems such as high-cost and the estimation is not completed in the train. In order to realize a congestion estimation system that can be estimated at low cost and complete in trains, we propose an in-train congestion estimation method by use of a wireless ad hoc network consisting of passengers' wireless LAN equipped terminals such as smartphones. This paper describes the estimation results of up to 1000 passenger terminals in the train using the proposed method. In addition, the preliminary experimental results for the method of excluding terminals that exists outside the train from the estimation results are also described.