TIME SYNCHRONIZATION SYSTEM AND TIME SYNCHRONIZATION METHOD IN TRAIN

摘要

Use is made of the communication functions of an inter-vehicle network for interconnecting the supervisory controllers and an intra-vehicle network connecting an apparatus and each supervisory controller mounted in each vehicle. Hereby, a train clock station located at the uppermost position of a hierarchical structure and a vehicle clock station located in the middle of the hierarchical structure are set among the supervisory controllers, and other equipment is set as correction information waiting stations located at the lowermost position of the hierarchical structure. The train clock station performs time correction of its own station appropriately by using time information acquired arbitrarily as a reference time. The vehicle clock station performs time correction of its own station based on a time correction information message transmitted from the train clock station. Further, the correction information waiting station performs time correction of its own station based on the time correction information message transmitted from the vehicle clock station.