Navigation device and map data updating method thereof
First Claim
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1. A navigation device comprising:
- a map database storing map data divided into predetermined update units, each update unit corresponding to a region obtained by dividing a map into a plurality of regions and each update unit respectively including identification information identifying the corresponding region and version information indicating a present update version;
receiving means for receiving, via a communication network, update data generated in update units corresponding to the update units of the map data, each generated unit of update data including difference information indicating an update content of the generated update data as a difference with the map data of the corresponding update unit stored in the map database, identification information identifying the corresponding region for the unit of update data, and version information indicating a post-update update version;
reading means for reading the update data from a recording medium storing a plurality of units of the update data; and
updating means for performing a differential update of the map data stored in the map database using the update data received by the receiving means or read by the reading means,wherein, when performing an update of the map data using the update data stored on the recording medium, the updating means extracts the update data units having identification information that matches the identification information of the update units of map data stored in the map database and having version information indicating a later update version than the update version of the update units of map data stored in the map database from the plurality of units of the update data stored on the recording medium, and performs a differential update of the update units of map data using the extracted update data units.
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Abstract
When updating means 24 for performing a differential update on map data M using update data U performs an update on the map data M using update data U stored on a recording medium R, update data U having section identification information that matches the section identification information of the map data M and a later update version than the update version of the map data M are extracted from the plurality of update data U stored on the recording medium R, and a differential update is performed on the map data M using the extracted update data U.
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Citations
13 Claims
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1. A navigation device comprising:
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a map database storing map data divided into predetermined update units, each update unit corresponding to a region obtained by dividing a map into a plurality of regions and each update unit respectively including identification information identifying the corresponding region and version information indicating a present update version; receiving means for receiving, via a communication network, update data generated in update units corresponding to the update units of the map data, each generated unit of update data including difference information indicating an update content of the generated update data as a difference with the map data of the corresponding update unit stored in the map database, identification information identifying the corresponding region for the unit of update data, and version information indicating a post-update update version; reading means for reading the update data from a recording medium storing a plurality of units of the update data; and updating means for performing a differential update of the map data stored in the map database using the update data received by the receiving means or read by the reading means, wherein, when performing an update of the map data using the update data stored on the recording medium, the updating means extracts the update data units having identification information that matches the identification information of the update units of map data stored in the map database and having version information indicating a later update version than the update version of the update units of map data stored in the map database from the plurality of units of the update data stored on the recording medium, and performs a differential update of the update units of map data using the extracted update data units. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A map data updating method for a navigation device, wherein, when a differential update is performed on map data using update data received via a communication network or read from a recording medium in a navigation device having a map database that stores map data divided into predetermined update units, each update unit corresponding to a region obtained by dividing a map into a plurality of regions and each update unit respectively including identification information identifying the corresponding region and version information indicating a present update version,
the update data are generated in update data units corresponding to the update units of the map data stored in the map database so as to include difference information indicating an update content of update subject map data as a difference with map data of the corresponding update unit stored in the map database, identification information identifying the corresponding region for the unit of update data, and version information indicating a post-update update version, and when an update of the map data is performed by reading the update data from the recording medium storing a plurality of units of update data, the update data having identification information that matches the identification information of the update units of map data stored in the map database and having version information indicating a later update version than the update version of the update units of map data stored in the map database are extracted from the plurality of units of the update data stored on the recording medium, and a differential update of the update units of map data in the map database is performed using the extracted update data.
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Current AssigneeAisin AW Company Limited (Aisin Corp.), Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
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Original AssigneeAisin AW Company Limited (Aisin Corp.), Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
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InventorsSugimoto, Hironobu, Sakai, Toru, Nakamura, Norihiro, Moribe, Isao, Kodan, Tomoki
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Primary Examiner(s)Trammell, James
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Assistant Examiner(s)Shafi, Muhammad
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Application NumberUS12/525,005Publication NumberTime in Patent Office1,604 DaysField of Search701 23- 26, 701200-203, 701/208, 701/212, 340988-996, 3423572-35723US Class Current701/408CPC Class CodesG01C 21/3859 Differential updating map dataG01C 21/3896 Transmission of map data fr...
