Patent ID: 11970194
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Transport (Mechanical engineering)
Classification: CPC B  G | IPC B  G

Claim 5:
6. A data management method for a terminal device including a plurality of processing devices, the data management method comprising in each of the processing devices:
managing data stored in a database;
determining data to request from an external system and an order in which the data is to be requested from the external system on the basis of a management state of the data, a management state of data in another processing device, and a type of predetermined event requiring data in a case where the predetermined event has occurred; and
managing a state of obtainment of data from the external system, wherein
determining the data to request from the external system and the order in which the data is to be requested from the external system comprises generating a first request queue indicating the data to request from the external system and the order in which the data is to be requested on the basis of the management state of the data and the type of predetermined event, obtaining, from another processing device, a first request queue generated on the basis of a management state of data in the other processing device and a type of predetermined event requiring data in a case where the predetermined event requiring data has occurred, combining the generated first request queue with the obtained first request queue to generate a second request queue indicating data to request from the external system and an order in which the data is to be requested by the terminal device, and
a predetermined processing device requests data from the external system by using the second request queue.