Lane-Level Navigation Control for Route Deviation Re-Matching
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Solution Overview
Problem
Navigation devices struggle to quickly re-match the position of a vehicle on a map when it passes through a branch point and deviates from the designated guidance route, leading to uncertainty in automatic driving control.
Innovation Solution
A navigation device with own vehicle position detecting, route setting, matching, driving lane detecting, and determining means, which uses a high-resolution HD map to accurately match the vehicle's position with the driving lane and updates the guidance route when necessary, ensuring accurate navigation and continuous automatic driving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the navigation device continues to match the vehicle position on the guidance route after deviation, then the route guidance remains stable, but the position matching accuracy deteriorates when the vehicle actually takes a different route
Solution Approach 1:
The system continuously monitors whether the vehicle position matches the driving lane on the HD map and provides feedback to the matching process. When a mismatch is detected (vehicle position not included in guidance route), the system switches matching strategies to maintain accuracy while preserving stability through controlled transitions.
Solution Approach 2:
The matching strategy dynamically adapts based on the vehicle's actual position relative to the guidance route. The system transitions between two matching modes: matching on the guidance route when aligned, and matching on the general map when deviated, allowing flexible response to changing navigation conditions.
2Measurement precision
If the navigation device switches matching strategy quickly when deviation is detected, then the position matching accuracy improves, but the system stability deteriorates due to frequent switching
Solution Approach 1:
The system proactively prevents unnecessary switching by first determining whether the vehicle position is actually included in the guidance route before changing matching strategies. This preliminary check avoids premature switching and maintains system stability while ensuring accurate matching.
3Measurement precision
If the navigation device uses detailed HD map data for continuous matching, then the position accuracy improves, but the computational complexity increases
Solution Approach 1:
The system applies different levels of map detail and matching precision to different spatial contexts. HD map-based precise matching is applied locally only when the vehicle is on or near the guidance route, while general map matching is used when deviated, optimizing computational resources based on local navigation needs.
Data Source
AI summary
A navigation device includes an own vehicle position detecting unit configured to detect position information of own vehicle; a route setting unit configured to set a guidance route that guides the own vehicle to a destination on the basis of a first map including information of a traveling route and the position information of the own vehicle; a matching unit configured to match a position of the own vehicle as a first own position with the traveling route where the own vehicle travels on the first map on the basis of the position information of the own vehicle; a driving lane detecting unit configured to match the position of the own vehicle as a second own position with a driving lane where the own vehicle travels on a second map on the basis of the second map including information of the driving lane in the traveling route and the position information of the own vehicle; and a calculating unit configured to determine whether the second own position is included in the first own position. When the guidance route is set, the matching unit matches the first own position on the guidance route, and when the second own position is no longer included in the first own position thereafter, the matching unit matches the first own position on the first map on the basis of the position information.