Navigation Device Map Data Regional Segmentation
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Solution Overview
Problem
Conventional navigation devices often use outdated map data, leading to incorrect routes and driving instructions due to the high cost and inefficiency of updating map data, which is typically sold in large packages covering entire countries, making it impractical for users to obtain up-to-date information.
Innovation Solution
A method where map data is assigned to smaller regions, allowing only the necessary data to be updated, reducing the data volume and cost, enabling frequent updates and spontaneous updates via cellular connections, with the option to receive map change data instead of full updates for even smaller data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If map data is updated using conventional methods (large packages covering entire countries), then completeness of map data is improved, but cost and data transmission time increase significantly
Solution Approach 1:
The patent divides the map data into multiple regions (first region, second region, third region) instead of updating the entire map as one large package. This segmentation allows selective updating of only the regions relevant to the current navigation route, significantly reducing data transmission time while maintaining completeness of required map data.
Solution Approach 2:
The patent extracts and updates only the necessary map data portions (specific regions along the navigation route) from the complete map data set. By taking out and updating only the relevant regions rather than the entire map, the system reduces unnecessary data transmission while ensuring all needed map information is current.
2Reliability
If map data is updated using conventional methods (large packages covering entire countries), then completeness of map data is improved, but cost increases significantly
Solution Approach 1:
The patent segments map data into multiple regions and updates only the necessary segments (first, second, and third regions along the navigation route) rather than purchasing and updating entire country-wide map packages. This reduces the quantity of map data purchased and the associated cost while maintaining completeness of required navigation information.
Solution Approach 2:
The patent applies partial action by updating only the specific regions needed for current navigation (first region containing current position, second region with anticipated destination, third region along the route) rather than performing complete map updates. This partial updating approach reduces cost while ensuring sufficient map data completeness for navigation purposes.
3Loss of time
If only necessary map data regions are updated, then data transmission time is reduced, but completeness of map data may be compromised
Solution Approach 1:
The patent performs preliminary actions by anticipating the destination and pre-loading map data for the first region (current position), second region (anticipated destination), and third region (along the navigation route) before navigation begins. This preliminary loading of relevant regional data ensures completeness is maintained while keeping individual update transmissions small and fast.
Solution Approach 2:
The patent applies local quality by ensuring high data completeness specifically for the regions that matter most (first, second, and third regions along the navigation route) while allowing other regions to have less updated data. This localized quality assurance maintains navigation reliability without requiring complete map data updates everywhere.
4Reliability
If full map data packages are purchased, then completeness of map data is improved, but device complexity and storage requirements increase
Solution Approach 1:
The patent segments the map data storage into multiple regional data sets (first region, second region, third region) rather than storing complete country-wide map packages. This segmentation reduces the total storage requirements while maintaining completeness of map data for relevant navigation areas through selective regional storage.
Data Source
Figure 1
Figure 2~3
Figure 4a~4c
AI summary
When operating a navigation device which has a non-volatile storage unit in which map data assigned to an area (100) is stored, the position (101) of the navigation device is determined, a region (102) is defined in which the position (101) of the navigation device is located such that the area of the region (102) is smaller than the area of the territory (100), and the map data assigned to the region (102) is updated, while the map data not assigned to the region (102) is not updated.