| 摘要 |
PROBLEM TO BE SOLVED: To realize a train radio communication system excellent in operability and high in safety by preventing a human errors caused in manual operations for switching railroad sections. SOLUTION: When an on-train element 7 forming a switching point transmission means with on-ground elements receives a signal denoting a railroad section sent by the on-ground elements 12a, 12b to recognize a railroad switching point, a mobile station CPU 5 and a synthesizer 4 forming a frequency changeover means automatically change a radio frequency of a mobile station 1 into a radio frequency of a next railroad section and also railroad data used for data transmission into new information to execute the switching of the railroad section.
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