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-2017314932-A1
Application number	US-201515521482-A
Country	US
Kind code	A1
Filing date	Oct 6, 2015
Priority date	Oct 29, 2014
Publication date	Nov 2, 2017
Grant date	—

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

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 corresponding to each section for rendering a navigation map divided into a plurality of sections and management data for designating the section data to be referenced at a time of the rendering,
the server device comprising:
a server device side receiving unit for receiving, from the navigation device, generation information of map data which is currently being referenced by the navigation device;
a difference data creating unit for creating difference data between map data of a generation corresponding to the received generation information and map data of a newest generation; and
a server device side distributing unit for distributing the created difference data to the navigation device,

the navigation device comprising:
a navigation device side receiving unit for receiving the difference data from the server device;
a management data updating unit for creating updated management data by updating the management data corresponding to the difference data based on the received difference data and writing the updated management data to a different area that is different from an area on which the management data before the update is stored; and
a section data updating unit for creating updated section data by updating the section data corresponding to the difference data based on the received difference data and writing the updated section data to a different area that is different from an area on which the section data before the update is stored,

wherein the updated management data designates the updated section data when rendering updated sections.

2 . A navigation device having a map data storing unit for storing map data including section data corresponding to each section for rendering a navigation map divided into a plurality of sections and management data for designating the section data to be referenced at a time of the rendering, the map data being updated in the navigation device, the navigation device comprising:
an input receiving unit for receiving input of difference data created by comparing new generation map data with old generation map data preceding the new generation map data; a management data updating unit for creating updated management data by updating the management data corresponding to the difference data based on the received input of the difference data and writing the updated management data to a different area that is different from an area on which the management data before the update is stored; and a section data updating unit for creating updated section data by updating the section data corresponding to the difference data based on the received input of the difference data and writing the updated section data to a different area that is different from an area on which the section data before the update is stored, wherein the updated management data designates the updated section data when rendering updated sections.

3 . The navigation device according to claim 2 , wherein in times subsequent to a first time, the different area is an area on which the section data before the update of the previous update is stored.

4 . The navigation device according to claim 2 , further comprising a write-area specifying unit for specifying an area within the map data storing unit, excluding areas on which the section data designated by the updated management data and the section data designated by the management data before the update are stored, as a writable area on which the updated section data can be written based on the updated management data and the management data before the update,
wherein the section data updating unit writes the updated section data to an area specified by the write-area specifying unit as the different area.

5 . A server device configured to communicate with the navigation device according to claim 2 , which creates difference data which is provided to the navigation device based on a plurality of generations of map data stored in the server device comprising:
a difference data creating unit for creating the difference data between map data of adjacent generations for each generation; a generation information receiving unit for receiving, from the navigation device, generation information of map data which is currently being referenced by the navigation device; and a difference data specifying unit for specifying difference data required for updating map data of a generation corresponding to the received generation information to map data of a newest generation; and a distributing unit for distributing the specified difference data to the navigation device.

6 . A server device configured to communicate with the navigation device according to claim 2 , which creates difference data which is provided to the navigation device based on a plurality of generations of map data stored in the server device comprising:
a generation information receiving unit for receiving, from the navigation device, generation information of map data which is currently being referenced by the navigation device; and a difference data creating unit for creating the difference data between map data of a generation corresponding to the received generation information and map data of a newest generation.

7 . The server device according to claim 6 , further comprising:
a notification signal receiving unit for receiving a notification signal indicating that the map data is not functioning normally in the navigation device; and a generation information requesting unit for making a request for the generation information when receiving the notification signal,
wherein the generation information receiving unit receives the generation information corresponding to the request.

8 . A navigation method which updates map data in a navigation device including a map data storing unit for storing map data including section data corresponding to each section for rendering a navigation map divided into a plurality of sections and management data for designating the section data to be referenced at a time of the rendering comprising:
an input receiving step of receiving input of difference data created by comparing new generation map data with old generation map data preceding the new generation map data; a management data updating step of creating updated management data by updating the management data corresponding to the difference data based on the received input of the difference data and writing the updated management data to a different area that is different from an area on which the management data before the update is stored; and a section data updating step of creating updated section data by updating the section data corresponding to the difference data based on the received input of the difference data and writing the updated section data to a different area that is different from an area on which the section data before the update is stored, wherein the updated management data designates the updated section data when rendering updated sections.

9 . The navigation method according to claim 8 , wherein; in times subsequent to a first time, the different area is an area on which the section data before the update of the previous update is stored.

10 . The navigation method according to claim 8 , further comprising a write-area specifying step of specifying an area within the map data storing unit, excluding areas on which the section data designated by the up

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

• G06F16/2358

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

• G06F16/29

  Geographical information databases · CPC title

• G01C21/26 Primary

  specially adapted for navigation in a road network · CPC title

• G06F17/30241

  Physics · mapped topic