Toyota Jidosha Kabushiki Kaisha

Kouichi Ando

Toru Ito

Tomoyasu Harada

On a vehicle side, map data storage section stores map data, which is to be updated by using the latest map data transmitted from an information center. The map data includes map data of a number of types, such as landmark information, drawing data, route calculation data. For drawing data and route calculation data, the information center sends differential data indicative of difference between the latest data held by the center and the map data held by the vehicle. The differential data of the drawing data is stored separately from extant data in the storage section by generating processing section. The differential data of the route calculation data is combined with extant data by restructure processing section to thereby restructure route calculation data. On the other hand, for landmark data, the center transmits full data, which is data corresponding to the entire latest map data, rather than only the difference. The full data is used to overwrite the extant data. As described above, an appropriate update process is performed according to the type of map data.

Map data processing apparatus and method, and map data processing system

An information center backs up the vehicle-use data of an on-vehicle terminal apparatus. The vehicle-use data used by the on-vehicle terminal apparatus is classified into standard data or custom data. The standard data is used in the same manner by numerous vehicles, while custom data is unique to each vehicle. The custom data is sent unchanged to the information center but, for the standard data, identification codes are sent rather than the raw standard data. This data is backed up and stored in the information center, where they remain available for retrieval should the data on the vehicle side be damaged. Because the volume of backup data is reduced, the communication time can be shortened and the required backup memory capacity in the information center can be reduced.

Vehicle-use data backup system and on-vehicle terminal apparatus comprised in the system

The present system executed data recovery without affecting other operations in the event that some recorded data has failed. In a database installed on a motor vehicle, program data, map data and the like used to carry out navigation are stored. If any set of these data has failed, a controller evaluates the urgency of recovery of the failed data set. For example, the urgency of recovery is evaluated by determining whether the failed data is part of a program in current use or whether it is map data scheduled to be used directly before long. Even if lower priority data in terms of the urgency of recovery has failed, the request for data recovery is issued at an appropriate delay timing instead of immediately requesting the information center to send that data, so that the influence of the data recovery on normal operation can be decreased.

Data recovery system and data recovery program recorded medium

A user inputs a position of a registration point by using an input device of an on-vehicle navigation device. A navigation ECU transmits the position of the registration point as a maintenance request to an information center. A center control section reads from a facility information memory section facility information of a facility existing at the position of the registration point and returns the facility information as maintenance data to the device. In the vehicle, new registration point data including the position of the registration point and the facility information is stored in a customizing information memory section. The user need only perform a simple operation, e.g., inputting of the position in order to obtain rich and detailed information. Furthermore, the registration point data in the memory section is appropriately updated with the updated information of the information center by using data communication with the information center.

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Susono, Japan

Kouichi Ando