NAVIGATION APPARATUS, DATA UPDATING METHOD, AND DATA UPDATING PROGRAM
1 Assignment
0 Petitions
Accused Products
Abstract
A navigation apparatus includes a storage unit, an acquiring unit, a comparing/identifying unit, an updating unit, and a control unit. The navigation apparatus stores data required for the navigation operation in a plurality of areas and also acquires the data from an external recording medium. The data stored in the plurality of areas is updated based on a comparison with the acquired data to identify which is the most recent data. At least while the updating of data is in progress, the data that is not in the process of being updated is used to perform navigation operation.
12 Citations
21 Claims
-
1-9. -9. (canceled)
-
10. A navigation apparatus comprising:
-
a storage unit that stores, in a plurality of areas, data necessary for navigation operation; an acquiring unit that acquires the data from an external recording medium; a comparing/identifying unit that compares the data stored in the storage unit and the data acquired by the acquiring unit to identify the most recent data; an updating unit that updates the data in the storage unit, based on comparison/identification results obtained by the comparing/identifying unit; and a control unit that, at least while the updating unit is updating the data, controls navigation operation to be performed based on the data that are not being updated by the updating unit, among the stored data and the acquired data. - View Dependent Claims (11, 12, 13)
-
-
14. A navigation method comprising:
-
storing, in a plurality of areas, data necessary for navigation operation; acquiring the data from an external recording medium; comparing the data stored in the storage unit and the data acquired by the acquiring unit; identifying the most recent data, based on a result obtained at the comparing; updating the data in the storage unit, based on the most recent data obtained at the identifying; and controlling navigation operation to be performed, at least while the updating is in progress, based on the data that are not being updated at the updating, among the stored data and the acquired data. - View Dependent Claims (15, 16, 17)
-
-
18. A computer-readable recording medium that stores therein a navigation computer program that causes a computer to execute:
-
storing, in a plurality of areas, data necessary for navigation operation; acquiring the data from an external recording medium; comparing the data stored in the storage unit and the data acquired by the acquiring unit; identifying the most recent data, based on a result obtained at the comparing; updating the data in the storage unit, based on the most recent data obtained at the identifying; and controlling navigation operation to be performed, at least while the updating is in progress, based on the data that are not being updated at the updating, among the stored data and the acquired data. - View Dependent Claims (19, 20, 21)
-
Specification