| 摘要 |
In a signaling system to ensure the safety of train running, by circulating, using wireless, a protection telegram message containing the occupation right information about a running track, among on-board devices of trains and switch devices in order, there is a probability that the occupation right information shared among the on-board devices and the switch devices cannot be updated and the function as the signaling system halts, when the protection telegram message is lost. When the protection telegram message is not received in a prescribed time, a recovery telegram message is circulated, and thereby, the information in the protection telegram message before the loss is restored. Then, based on the information, a protection telegram message is newly issued to be circulated. |
