Vehicle information communication system

A vehicle information communication system comprising:

• a center device that manages data to be written in a plurality of electronic control units mounted on a vehicle, the center device being an external device located outside of the vehicle;
• and
• an in-vehicle device that is mounted on the vehicle and includes a vehicle inside communication unit that performs communication with the plurality of electronic control units, and a vehicle outside communication unit that performs wireless communication with the center device, wherein
• when a plurality of pieces of configuration information regarding configurations of respective devices are received from the plurality of electronic control units, the in-vehicle device generates a hash value based on data values of the plurality of pieces of configuration information, and transmits the hash value to the center device,
• the center device includes a vehicle-side configuration information storage unit that stores configuration information regarding the vehicle equipped with the in-vehicle device, compares the hash value received from the in-vehicle device with a hash value of the configuration information of the vehicle stored in the vehicle-side configuration information storage unit, and notifies the in-vehicle device of a full data transmission request for transmitting all data values of the configuration information when both of the hash values do not match each other,
• when the in-vehicle device is notified of the full data transmission request, the in-vehicle device transmits all of the data values of the configuration information to the center device,
• when all of the data values are received, the center device updates the configuration information stored in the vehicle-side configuration information storage unit on the basis of the data values, and
• the configuration information includes a software ID of a respective electronic control unit and further includes at least one of:
• a system ID which is updated as software of any one or more electronic control units belonging to a system representing a group of electronic control units is updated;
• or a software ID of the vehicle.