Map Update System Prioritizing Unrecorded High-Precision Data
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Solution Overview
Problem
In map providing systems for automatic driving, areas without high-precision map data or unrecorded regions hinder the use of automatic driving, as conventional systems fail to prioritize updates for newly developed map data, leading to unnecessary updates and lack of reference data for main roads or travel routes.
Innovation Solution
A map providing system that includes a first map storage and a second map storage, with a map update portion that selects update points based on differences between the two maps and requests updates from a management device, prioritizing areas with unprepared or unrecorded high-precision map data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional map update methods are used that update based on own vehicle position and route data, then map data can be updated, but newly prepared high-precision map data cannot be prioritized and unrecorded areas remain unupdated
Solution Approach 1:
The system performs preliminary comparison between first map data (with main roads) and second map data (for automatic driving) to identify unrecorded areas before executing updates. This preliminary identification ensures that newly prepared high-precision map data is prioritized for update, preventing delays in making critical map data available for automatic driving operations.
Solution Approach 2:
The update mechanism focuses resources on specific local areas where differences are detected between the two map datasets. Instead of uniform updates, the system identifies and updates only the unrecorded areas that contain newly prepared high-precision map data, optimizing both reliability improvement and time efficiency.
2Productivity
If map updates are performed without comparing against reference map data, then update processing can be simplified, but unnecessary updates occur and newly prepared map data cannot be identified
Solution Approach 1:
The system implements a feedback mechanism where the comparison result between first map data and second map data feeds into the update decision process. This feedback loop identifies unrecorded areas containing newly prepared map data, ensuring that update efficiency is maintained while preventing loss of information about what needs to be updated.
Solution Approach 2:
The comparison process extracts and identifies the specific differences between the two map datasets, isolating the unrecorded areas that contain newly prepared high-precision map data. This extraction enables targeted updates that maintain productivity while preserving critical information about new map content.
3Measurement precision
If the system waits for reference data to be available before updating, then update accuracy improves, but automatic driving cannot be used in areas without reference data
Solution Approach 1:
The system performs preliminary comparison and identification of unrecorded areas using available reference data (first map data with main roads). This preliminary action enables the system to identify and update newly prepared map data even in areas where complete reference data may not yet be available, improving both update accuracy and system adaptability.
Solution Approach 2:
The map data structure is segmented into first map data (reference with main roads) and second map data (for automatic driving). This segmentation allows the system to compare and identify differences systematically, enabling accurate targeting of updates while maintaining adaptability across different geographic areas with varying levels of reference data availability.
Data Source
AI summary
An object of a map providing system of the present invention is to specify a range of map data that may be newly prepared, and to increase an opportunity to use a latest map. A map providing system compares route information or road information on a first map stored in a first map storage portion (71) with road information on a second map stored in a second map storage portion (21), selects an update point of the second map on the basis of road information not included in the second map, and requests a map OTA server 5 that manages latest update data of the second map to provide the update data of the update point of the second map.