In-vehicle guidance display system and in-vehicle guidance display method

Abstract

A ground system includes a guidance-display-data creation device that creates a dataset including information on a stop station pattern, effective-period related information, and train number information as guidance display data, and an information distribution server that wirelessly distributes all or a part of a dataset included in the guidance display data to an on-board system. The on-board system includes a central distribution server that manages the distributed dataset, and when a train number is set, distributes the dataset to each vehicle if the central distribution server holds a dataset corresponding to the train number and within an effective period, and notifies the information distribution server of the train number to acquire a corresponding dataset and distributes the corresponding dataset to each vehicle if the central distribution server does not hold the dataset corresponding to the train number and within the effective period.

1 . An in-vehicle guidance display system comprising:
 a ground system that creates guidance display data to be used to display a guidance in a vehicle of a train; and   an on-board system that is mounted on the train and displays a guidance using guidance display data created by the ground system, wherein   the ground system includes   a guidance-display-data creation device that creates, for each line as the guidance display data, a dataset including information on a stop station pattern for each train type, effective-period related information indicating at least one of a start date and time and an end date and time of an effective period, and train number information, and   a data distribution server that holds the guidance display data and that wirelessly distributes all or a part of the dataset included in the held guidance display data to the on-board system at a predetermined timing, and   the on-board system includes   a central distribution server that manages the dataset distributed from the ground system, and when a train number of a train in which the on-board system is installed is set,   distributes the dataset to each vehicle if the central distribution server holds a dataset corresponding to the train number and within the effective period, and   notifies the data distribution server of the train number to acquire a corresponding dataset and distributes the corresponding dataset to each vehicle if the central distribution server does not hold the dataset corresponding to the train number and within the effective period, and   a display terminal device that is installed in each vehicle and that displays a guidance on a display device in the vehicle based on the dataset distributed from the central distribution server.   
     
     
         2 . The in-vehicle guidance display system according to  claim 1 , wherein
 in a case where the effective-period related information indicates a start date and time of an effective period,   when the central distribution server acquires a new dataset and holds an old dataset identical to the acquired dataset in a line but different from the acquired dataset in the start date and time of the effective period, the central distribution server discards the old dataset after a time enters the effective period of the newly acquired dataset.   
     
     
         3 . The in-vehicle guidance display system according to  claim 1 , wherein
 in a case where the effective-period related information indicates an end date and time of an effective period,   the central distribution server discards each held dataset after the end date and time of the effective period.   
     
     
         4 . The in-vehicle guidance display system according to  claim 1 , wherein the effective-period related information indicates at least one of a start date and time and an end date and time of each effective period for a plurality of effective periods. 
     
     
         5 . The in-vehicle guidance display system according to  claim 1 , wherein the guidance display data includes at least a data creation date and time or a data version as data management information. 
     
     
         6 . The in-vehicle guidance display system according to  claim 1 , wherein the data distribution server acquires information on a running line of the train, in which the on-board system is installed, from the on-board system that is a dataset distribution destination, and selects a dataset to be distributed based on the acquired information. 
     
     
         7 . The in-vehicle guidance display system according to  claim 1 , wherein the data distribution server acquires information on a capacity of a memory included in the central distribution server of the on-board system from the on-board system that is a dataset distribution destination, and selects a dataset to be distributed based on the acquired information. 
     
     
         8 . The in-vehicle guidance display system according to  claim 1 , wherein the central distribution server deletes a managed dataset at a time point when a time of the dataset is out of the effective period. 
     
     
         9 . The in-vehicle guidance display system according to  claim 1 , wherein a start date and time or an end date and time of the effective period indicated by the effective-period related information is set to a schedule revision date and time of a railway system. 
     
     
         10 . An in-vehicle guidance display method executed by a railway system including a ground system that creates guidance display data to be used to display a guidance in a vehicle of a train, and an on-board system that is mounted on the train and displays a guidance using guidance display data created by the ground system, the in-vehicle guidance display method comprising:
 a guidance-display-data creating step of, by the ground system, creating, for each line as the guidance display data, a dataset including information on a stop station pattern for each train type, effective-period related information indicating at least one of a start date and time and an end date and time of an effective period, and train number information;   a data distributing step of, by the ground system, wirelessly distributing all or a part of the dataset included in the guidance display data to the on-board system at a predetermined timing; and   a guidance displaying step of, by the on-board system, managing the dataset distributed from the ground system, and when the train number of the train in which the on-board system is installed is set,   distributing the dataset to each vehicle and displaying a guidance on a display device in each vehicle if a dataset corresponding to the train number and within the effective period is held, and   notifying the ground system of the train number to acquire a corresponding dataset, distributing the acquired dataset to each vehicle, and displaying the guidance on the display device in each vehicle if the dataset corresponding to the train number and within the effective period is not held.