Guidance Device Dual Memory Map Update Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional guidance systems face delays in providing route guidance due to the time-consuming process of updating map information on the client side, which disrupts the consistency of road networks and database structures, leading to prolonged downtime before guidance can be offered.
Innovation Solution
A guidance device and method that acquire update information from a map information provider, using temporarily delivered information with the same data structure as the stored map information to provide immediate guidance until the update is complete, and then switch to the updated map information post-completion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If map information is updated by using update information to maintain consistency of connection between roads and arrangement of data in memory, then reliability of guidance is improved, but time required for update increases
Solution Approach 1:
The patent divides map information into two separate storage locations: guidance memory for active guidance operations and update memory for storing updated map data. This segmentation allows the system to maintain consistency in guidance memory while preparing updates in update memory, eliminating the need to halt guidance operations during the update process and thus reducing update time without compromising reliability.
Solution Approach 2:
The system performs preliminary actions by storing updated map information in update memory before actually using it. The guidance system continues operating with the previous stable map data while the updated data is prepared in advance. When ready, the updated information is switched into guidance memory without interrupting active guidance operations, thereby maintaining reliability while reducing the perceived update time.
2Reliability
If map information update is completed before providing guidance, then reliability of guidance is improved, but guidance cannot be provided quickly
Solution Approach 1:
By segmenting map information storage into guidance memory and update memory, the system enables guidance to be provided immediately from guidance memory while update memory contains the latest map data. This allows the guidance system to operate at full speed using stable data, while updates are prepared separately and switched in when needed, thus maintaining both speed and reliability.
Solution Approach 2:
The patent introduces an intermediary mechanism (the dual-memory structure with switching capability) that allows the guidance system to access stable map data for immediate guidance provision while simultaneously receiving updated data in the background. This intermediary structure decouples the guidance provision speed from the update completion time, enabling fast guidance response without waiting for update completion.
Data Source
AI summary
Guidance systems, methods, and programs acquire, from a map information providing device, update information for updating map information that is stored in guidance memory, and update, on the basis of the acquired update information, the stored map information. The systems, methods, and programs acquire, from the map information providing device, temporarily delivered information that is used for guidance until the update is complete. The temporarily delivered information has an identical data structure to the stored map information and is replaceable with the stored map information. Until the update is complete, the systems, methods, and programs provide guidance on the basis of the acquired temporarily delivered information. After the update is compete, however, the systems, methods, and programs provide guidance on the basis of the updated map information.