Japan Railway Safety System

摘要

PROBLEM TO BE SOLVED: To secure the real-time property of train control and the operation rate of an overall system even if one communication path is failed while another communication path is being exclusively used for data communication for a man-machine terminal in a control-system network for a multiplexed railway security system.SOLUTION: A railway security system occupies one of multiplexed communication paths exclusively for communication of a man-machine terminal by communication path occupancy instructions from the man-machine terminal. Another terminal stops transmitting data for train control to the occupied communication path. If transmission and reception of the data for train control becomes impossible in the system due to abnormality or the like of a communication path other than the occupied communication path, the railway security system immediately releases the occupied communication path in response to instructions from a device that has detected the abnormality.SELECTED DRAWING: Figure 1