Navigation Device Area Section Priority Guidance Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing navigation devices face challenges in providing accurate travel guidance due to outdated map information, leading to increased communication and processing loads when required data is deleted, as they lack a method to prioritize guidance information by area sections.
Innovation Solution
The system sets remaining priorities for guidance information stored in the navigation device on a per area section basis, ensuring that information required for future movement guidance is retained, and deletes data with low priority first to manage storage space effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If mesh data is sequentially accumulated in the storage medium, then the amount of communication is reduced, but the storage medium becomes full and unnecessary mesh data must be deleted
Solution Approach 1:
The patent applies local quality by assigning different priority levels to different mesh data based on their area section characteristics. Mesh data is classified into multiple priority levels (first priority, second priority, etc.), where higher priority mesh data is retained in the storage medium while lower priority mesh data is deleted when storage space is insufficient. This selective retention strategy reduces the need for repeated communications with the server while efficiently managing limited storage resources.
2Quantity of substance
If old mesh data and low frequency mesh data are deleted from the cache, then storage space is freed, but mesh data required in the future cannot be identified and must be re-obtained
Solution Approach 1:
The patent implements preliminary action by pre-classifying mesh data into priority levels before deletion occurs. The system assigns priority levels to mesh data based on area section information, ensuring that mesh data likely to be required in the future is marked with higher priority. When storage space becomes insufficient, only lower priority mesh data is deleted, preventing the need to re-obtain essential data and thereby reducing future communication loads.
3Reliability
If center route search is performed using the latest map information, then a route can be searched based on current data, but the communication terminal cannot appropriately provide travel guidance along the guided route
Solution Approach 1:
The patent applies segmentation by dividing map information into mesh data units organized by area sections. Each mesh data unit is independently managed with its own priority level. This segmentation allows the system to selectively retain or delete specific mesh data units based on their priority, enabling the communication terminal to maintain accurate route search capabilities through center route search while preserving the necessary guidance information for executing the routed.
Data Source
AI summary
Movement guidance devices and programs provide movement guidance for a mobile unit using guidance information for providing movement guidance for the mobile unit. The guidance information is delivered from a server device. The devices and programs store the guidance information delivered from the server device in a memory. The stored guidance information is area-section-by-area-section guidance information. The devices and programs set a remaining priority for the stored guidance information on a per area section basis of map information and delete, from the memory, guidance information for an area section with a low remaining priority on a priority basis rather than guidance information for an area section with a high remaining priority among the stored guidance information.