Train occupancy guess range determined device, the onboard system and the train occupancy guess range Application Method

In radio train control system for a train rail management by transmitting a train position on the car detects the earth, the problem of on-rail detection which may occur during position correction by the correction element. In the on-board equipment 20, for example, the train position is determined by counting the number of revolutions of the tachometer generator 12, based on this train position, to confirm the train occupancy guess range possibility that the train exists there and transmits it to the ground device 30. Further, at the time of passing through the installation point of Hoseiko 50 corrects the train position based on the communication result with the Hoseiko 50. When the correction of the train position according to the correction element 50 has a correction of the backward direction, until the latest train position reaches the train position correction immediately before, based on the train occupies a train position correction immediately before to confirm, send a guess range, and the latest train position reaches the train position of immediately before the correction, and later, to establish and transmitting the train occupied guess range based on the latest train position.