Navigation Waypoint Intermediary for Database Alignment
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Solution Overview
Problem
Existing navigation systems face guidance errors due to differences between offboard and onboard cartographic databases, particularly near maneuver points, and have insufficient precision and update for Estimated Time of Arrival (ETA) calculations.
Innovation Solution
The system calculates a list of waypoints on the primary route, spaced away from maneuvering points, and sends these to the mobile device, allowing the onboard routing engine to establish a secondary route without receiving maneuvering points or cartographic data, and periodically updates ETA based on traffic changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the system uses offboard cartographic database for route calculation, then the routing information can be comprehensive and up-to-date, but guidance errors occur due to differences with onboard cartographic database
Solution Approach 1:
The patent introduces waypoints as an intermediary element between the offboard and onboard cartographic databases. These waypoints serve as reference points that are calculated based on the offboard database but are used to guide the onboard routing engine, which operates with the onboard database. This intermediary layer resolves the inconsistency between the two databases by providing a common reference framework that both can work with, eliminating guidance errors while maintaining the benefits of comprehensive offboard routing information.
2Loss of information
If the mobile device receives complete maneuvering points from the server, then the routing information is complete, but the device complexity and data transmission requirements increase
Solution Approach 1:
The patent extracts only the essential routing information (waypoints) from the complete maneuvering points data and transmits only this extracted subset to the mobile device. The mobile device then uses its onboard routing engine to reconstruct the complete routing information locally. This extraction approach reduces data transmission requirements and device complexity while maintaining routing information completeness through local reconstruction.
3Measurement precision
If the system updates ETA frequently, then the precision of ETA information improves, but the energy consumption and processing load increase
Solution Approach 1:
The patent implements periodic ETA updates at strategically selected points along the route rather than continuous updates. The system calculates ETA at specific intervals or trigger points, which provides sufficiently precise ETA information to users while significantly reducing energy consumption and processing load compared to continuous real-time updates. This periodic approach balances precision requirements with resource constraints.
Data Source
AI summary
Navigation system and method comprising a server system with a navigation server (6) and a host server (7) connected to internet, having a first cartographic database (61) and a first routing engine, a mobile device (8) having geolocating means to determine a current location, having a second cartographic database (81) and a second routing engine, wherein the mobile device transmits a routing request to the remote server system, wherein the server system calculates a primary route (4) from the current location (3) to the destination point (2), said primary route comprising a list of maneuvering points each maneuvering point, wherein the server system calculates a list of waypoints located on the primary route, spaced away from the maneuvering points, the second routing engine establishing therefrom a secondary route (5), based on the waypoints and on the second cartographic database.