Map-updating-data creating method
First Claim
1. A map updating method for a navigation apparatus, the map updating method comprising:
- performing multitask control to execute both navigation processing and map-updating processing via the navigation apparatus, the navigation processing being higher in priority than the map-updating processing such that the map-updating processing is performed during periods unoccupied by navigation processing;
performing sequential map-updating processing, as part of the map-updating processing, via the navigation apparatus on a plurality of map files utilizing map-updating data, the sequential map-updating processing involving a comparison between an old map file and a corresponding new map file;
determining whether or not a necessary map file required for navigation processing contains up-to-date map data based upon the comparison performed by the sequential map-updating processing; and
either executing navigation processing by using the necessary map file if the necessary map file contains up-to-date map data, or, if the necessary map file does not contain up-to-date map data, the navigation apparatus interrupts the sequential map-updating processing and then after using the map-updating data to update the necessary map file, the navigation apparatus restarts the sequential map-updating processing and subsequently executes navigation processing using the updated necessary map file.
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Accused Products
Abstract
A map-updating-data creating apparatus performs, for each old map file, creating a map-updating file for rewriting the map file to a new map file, determining the serial number of each of the updated map files, creating a serial number management file in which marks are respectively written at positions corresponding to the serial numbers, and generating, as map-updating data, the map-updating file and the serial number management file. A navigation apparatus performs map-updating processing and determines, by referring to the serial number management file, whether a map file has already been updated. The navigation apparatus uses the map-updating file to execute navigation control if the map file has already been updated, and updates the map file and subsequently executes the navigation control if the map file has not been updated.
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Citations
7 Claims
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1. A map updating method for a navigation apparatus, the map updating method comprising:
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performing multitask control to execute both navigation processing and map-updating processing via the navigation apparatus, the navigation processing being higher in priority than the map-updating processing such that the map-updating processing is performed during periods unoccupied by navigation processing; performing sequential map-updating processing, as part of the map-updating processing, via the navigation apparatus on a plurality of map files utilizing map-updating data, the sequential map-updating processing involving a comparison between an old map file and a corresponding new map file; determining whether or not a necessary map file required for navigation processing contains up-to-date map data based upon the comparison performed by the sequential map-updating processing; and either executing navigation processing by using the necessary map file if the necessary map file contains up-to-date map data, or, if the necessary map file does not contain up-to-date map data, the navigation apparatus interrupts the sequential map-updating processing and then after using the map-updating data to update the necessary map file, the navigation apparatus restarts the sequential map-updating processing and subsequently executes navigation processing using the updated necessary map file. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification