Map update system, navigation device, server device, map update method, navigation method, server device control method, and tangible non-transitory computer-readable storage medium containing computer program

Patent metadata

Field	Value
Publication number	US-10533859-B2
Application number	US-201515521482-A
Country	US
Kind code	B2
Filing date	Oct 6, 2015
Priority date	Oct 29, 2014
Publication date	Jan 14, 2020
Grant date	Jan 14, 2020

Abstract

A map update system, a navigation device, and a server device is provided. The map update system updates map data of the navigation device based on map data stored by the server device, the map data includes section data corresponding to each section of a navigation map divided into multiple sections and management data designating the section data to be referenced when rendering, the server device receives generation information from the navigation device of map data being currently referenced by the navigation device and creates difference data between map data of a generation corresponding to the received generation information and map data of a newest generation, the navigation device creates updated management data and updated section data by updating management data and section data corresponding to the difference data and writes respectively updated data on different areas that are different from areas on which respective pre-update data area stored.

First claim

The invention claimed is:

1. A map update system having a server device storing map data for each generation and a navigation device configured to communicate with the server device, the map update system updating map data of the navigation device based on the map data stored by the server device,
the map data comprising section data and management data, wherein the section data for rendering sections defined by dividing a navigation map and the management data for designating the section data to render the sections of the navigation map,
the server device comprising:
a processor that is configured to:
receive, from the navigation device, generation information of map data which is currently being referenced by the navigation device;
create difference data of management between the management data of a generation corresponding to the received generation information and the management data of a newest generation and create difference data of section between the section data of the generation corresponding to the received generation information and section data of the newest generation; and

distribute the created difference data of the management and the difference data of section to the navigation device,
the navigation device comprising:
a processor configured to:

 receive the difference data of the management and the difference data of section from the server device;
 create updated management data by updating current management data currently being referenced by the navigation device based on the difference data of management, and write the updated management data to an area that is different from an area on which the current management data is stored; and
 create updated section data by updating current section data currently being referenced by the navigation device based on the difference data of section, and write the updated section data to an area that is different from an area on which the current section data is stored.

2. A navigation system having a server device storing map data for each generation and a navigation device configured to communicate with the server device, the map date in the navigation device is updated based on map data stored in the server device comprising:
the map data comprises section data and management data, wherein the section data for rendering sections defined by dividing a navigation map and the management data for designating the section data to render the sections of the navigation map, the server device comprising:
a processor configured to:
receive, from the navigation device, generation information of map data which is currently being referenced by the navigation device;
create difference data of management between the management data of a generation corresponding to the received generation information and management data of a newest generation, and create difference data of section between the section data of the generation corresponding to the received generation information and section data of the newest generation, and
distribute the created difference data of management and the difference date of section to the navigation device,
the navigation device comprising:
a processor configured to:
receive the difference data of management and the difference data of section from the server device;
create updated management data by updating current management data currently being referenced by the navigation device based on the difference data of management, and write the updated management data to an area that is different from an area on which the current management data is stored;
create updated section data by updating current section data currently being referenced by the navigation device based on the difference data of section, and write the updated section data to an area that is different from an area on which the current section data is stored; and
display the navigation map based on the updated section data and the current section data designated both by the updated management data, and display the navigation map based on the current section data designated by the current management data, instead of the updated management data, in a case where the updated section data including an error.

3. The navigation system according to claim 2 , wherein updated section data is updated n times, on an area on which the section data having been updated n−2 times is stored.

4. The navigation system according to claim 2 , wherein writeable area on which the updated section data is writable is specified according to the updated management data and the current management data, wherein the writable area being an area within the map data storing unit, excluding an area having been designated by by the updated management data and by the current management data to store the updated section data and current section data respectively.

5. A navigation method for updating map data, wherein a server device stores map data for each generation and a navigation device is configured to communicate with the server device, the map date in the navigation device is updated based on map data stored in the server device comprising:
the map data comprises section data and management data, wherein the section data for rendering sections defined by dividing a navigation map and the management data for designating the section data to render the sections of the navigation map, the server device comprising:
a processor configured to:
receive, from the navigation device, generation information of map data which is currently being referenced by the navigation device;
create difference data of management between the management data of a generation corresponding to the received generation information and management data of a newest generation, and create difference data of section between the section data of the generation corresponding to the received generation information and section data of the newest generation, and
distribute the created difference data of management and the difference date of section to the navigation device,
the navigation device comprising:
a processor configured to:
receive the difference data of management and the difference data of section from the server device;
create updated management data by updating current management data currently being referenced by the navigation device based on the difference data of management, and write the updated management data to an area that is different from an area on which the current management data is stored;
create updated section data by updating current section data currently being referenced by the navigation device based on the difference data of section, and write the updated section data to an area that is different from an area on which the current section data is stored; and
display the navigation map based on the updated section data and the current section data designated both by the updated management data, and display the navigation map based on the current section data designated by the current management data, instead of the updated management data, in a case where the updated section data, including an error.

6. The navigation method according to claim 5 , wherein the section data is updated n times, on an area on which the section data having been updated n−2 times is stored.

7. The navigation method according to claim 5 , wherein a writeable area on which the updated section data is writable is specified according to the updated management data and the current management data, wherein the writable area being an area within the map data storing unit, excluding an area having been designated by the updated management data and by the current management data to store the updated section data and current section data respectively.

8. A ta

Assignees

• Toyota Mapmaster Incorporated
• Micware Co Ltd

Inventors

• Miwa Takahiro
• Shingu Ayumu

Classifications

• G06F16/2379

  Updates performed during online database operations; commit processing · CPC title

• G01C21/26 Primary

  specially adapted for navigation in a road network · CPC title

• G06F16/29

  Geographical information databases · CPC title

• G06F16/2358

  Change logging, detection, and notification (replication G06F16/27) · CPC title

• G09B29/003 Primary

  Maps · CPC title