Time synchronization system and time synchronization method...

G - Physics – 04 – G

Patent

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G04G 5/00 (2006.01) G04G 7/00 (2006.01) H04L 12/44 (2006.01)

Patent

CA 2707119

Communication functions in an inter-vehicle network that connects monitoring and control devices and an intra-vehicle network that couples an in-vehicle device mounted on each of vehicles and each of the monitoring and control devices are utilized. A train clock station that is ranked at an uppermost in a hierarchical structure and a vehicle clock station that is ranked in a middle in the hierarchical structure are set from among the monitoring and control devices. Other devices are set as a correction information waiting station that is ranked at a lowermost in the hierarchical structure. The train clock station appropriately performs a time correction of the own station with time information that is arbitrarily obtained as the reference time. The vehicle clock station performs a time correction of the own station based on a time-correction-information message transmitted from the train clock station. The correction information waiting station performs a time correction of the own station based on a time-correction-information message transmitted from the vehicle clock station.

L'invention concerne l'utilisation des fonctions de communication d'un réseau inter-véhicules permettant de relier les ordinateurs-interpolateurs et un réseau intra-véhicule reliant un appareil et chaque ordinateur-interpolateur monté dans chaque véhicule. Ainsi, une station d'horloge de train située au niveau de la position supérieure d'une structure hiérarchique et une station d'horloge de véhicule située au milieu de la structure hiérarchique sont établies parmi les ordinateurs-interpolateurs, et un autre équipement est établi en tant que station en attente d'informations de correction située au niveau de la position inférieure de la structure hiérarchique. La station d'horloge de train met en oeuvre une correction temporelle de sa propre station de manière appropriée au moyen d'informations temporelles acquises arbitrairement en tant que temps de référence. La station d'horloge de véhicule met en oeuvre une correction temporelle de sa propre station en fonction d'un message d'informations de correction temporelle transmis à partir de la station d'horloge de train. En outre, la station d'attente d'informations de correction met en oeuvre une correction temporelle de sa propre station en fonction du message d'informations de correction temporelle transmis à partir de la station d'horloge de véhicule.

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