Sensor Network Infra Test for Monitoring of High-Speed Railway

The High-Speed Railway runs at the speed up to 300Km/h and is a complex system that works many electronic devices and machines together. Its system complexity is very high, so sensors that check the system status and communication systems are very important. And sensors installed in this kind of a high-speed railway make data that is several Mbytes per minute, so measurements for trains usually use wire-based networks. Most of the trains are divided into two parts: up-side and down-side. And sensors for important data are attached in down-side, but monitoring servers and monitoring equipment are installed in up-side. Here is a problem. When up-side and down-side are divided, because of maintenance, etc., the wired network between up-side and down-side has to be removed, and after repairing, connected again. If trains use Low power Personal Area Networks (LoWPANs) to remove this kind of inconvenience, data wire can be eliminated. In addition, if trains use a high-speed wireless mobile communication network like High Speed Downlink Packet Access (HSDPA), it’s possible to send monitoring data that is collected in the inside of trains, at the server of outside remote place. Thus it can be a central control system.