Navigation Apparatus Route Data Extraction
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Solution Overview
Problem
Conventional navigation systems face high communication costs and time due to the transmission of large amounts of map data, and users struggle to access desired information amidst excessive guide data, particularly on small screens.
Innovation Solution
A navigation apparatus that acquires only necessary map information from a server, allowing users to select specific guide information based on search conditions, reducing communication time and costs, and prioritizing the display of relevant data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If all map information related to the retrieved route is transmitted from the control station to the mobile device, then the user can acquire complete route guidance information, but communication time and communication costs increase significantly
Solution Approach 1:
The patent extracts and transmits only the necessary portion of map information (the retrieved route data) from the control station to the mobile device, rather than transmitting all map information. This extraction principle reduces communication data volume while ensuring the user receives complete route guidance information needed for navigation.
Solution Approach 2:
The patent segments map information into different components: route information (transmitted from control station), and map data (stored locally in the mobile device). This segmentation allows the system to transmit only the essential route guidance data over the communication channel while maintaining complete navigation functionality through local map storage.
2Loss of information
If all map information related to the retrieved route is transmitted from the control station to the mobile device, then the user can acquire complete route guidance information, but communication costs increase significantly
Solution Approach 1:
The patent extracts and transmits only the necessary portion of map information (the retrieved route data) from the control station to the mobile device, rather than transmitting all map information. This extraction principle reduces communication data volume while ensuring the user receives complete route guidance information needed for navigation.
Solution Approach 2:
The patent segments map information into different components: route information (transmitted from control station), and map data (stored locally in the mobile device). This segmentation allows the system to transmit only the essential route guidance data over the communication channel while maintaining complete navigation functionality through local map storage.
3Loss of time
If only part of the route map information that the user has not yet traveled is transmitted, then communication time and costs are reduced, but the user cannot acquire map information for known routes even when seeking route guiding
Solution Approach 1:
The patent implements self-service by storing map information locally in the mobile device, enabling the system to independently provide complete route guidance information without requiring continuous communication with the control station. The mobile device serves itself by utilizing its local map database to deliver comprehensive navigation information for both known and unknown routes.
4Loss of information
If a large quantity of guide information is downloaded through communication, then the quantity and updatedness of guide information is complemented, but it becomes uncomfortable for the user to view the desired guide information on a small screen
Solution Approach 1:
The patent extracts and downloads only the necessary guide information related to the retrieved route from the control station to the mobile device, rather than downloading all available guide information. This selective extraction reduces the volume of downloaded data while ensuring the user receives relevant and updated guide information for their specific route, making it more manageable on small display screens.
Data Source
AI summary
A navigation apparatus acquires geographic information from a server apparatus. When the navigation apparatus does not store any geographic information that provides a continuous route from the starting point to a destination point, it transmits data of the starting point and destination point to the server apparatus to acquire therefrom geographic information that provides a continuous route from the starting point to the destination point. This efficient acquisition of geographic information realizes reduction of communication time and communication costs.