MONITORING RADIO STATION, STATION ON TRAIN AND TRAIN RADIO SYSTEM

摘要

PROBLEM TO BE SOLVED: To obtain a monitoring radio station, a station on a train and a train radio system capable of transmitting observed data, etc., collected by a device along a railroad without ensuring dedicated wire circuit and radio channel. SOLUTION: This monitoring radio station 17 is provided for detecting a stop period of a transmission radio wave of base stations 121to 12nto the station 14 on a train and transmitting data collected by the device 16 along a railroad to the station 14 on a train when the transmission radio wave of the base stations 121to 12nstops. COPYRIGHT: (C)2003,JPO