GNSS Integrity Assessment for Vehicle Positioning
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Solution Overview
Problem
Current GNSS positioning methods lack integrity information, which is crucial for ensuring the reliability and accuracy of location data, particularly in safety-critical applications like autonomous driving, where precise and reliable location information is essential.
Innovation Solution
A method that involves receiving and evaluating integrity information related to GNSS correction data, allowing for the influence of GNSS-based vehicle location, enabling the use of GNSS correction data with confidence in safety-critical applications by providing integrity information from external providers, which can be used to improve the safety and accuracy of in-vehicle location determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GNSS correction data is used for precise positioning, then location precision is improved, but reliability and integrity cannot be guaranteed due to lack of integrity information
Solution Approach 1:
The system performs preliminary integrity assessment of GNSS correction data before using it for positioning. The evaluation unit assesses the integrity of correction data in advance, and the control unit decides whether to use the corrected positioning results based on this pre-assessment, ensuring reliability before precision is applied
Solution Approach 2:
An intermediary evaluation unit is introduced between the GNSS correction data reception and the positioning calculation. This unit acts as a mediator that assesses the integrity of correction data and provides evaluation results to the control unit, which then decides whether to trust the positioning results
2Reliability
If integrity information is added to GNSS correction data, then reliability is improved, but data transmission complexity increases
Solution Approach 1:
The system segments the correction data processing into distinct functional units: a reception unit for receiving correction data, an evaluation unit for assessing integrity, and a control unit for decision-making. This segmentation allows each unit to perform its specific function efficiently without increasing overall system complexity
3Productivity
If GNSS-based location is used as sole method for autonomous driving, then productivity is improved, but safety cannot be ensured without integrity verification
Solution Approach 1:
The system implements a feedback mechanism where the evaluation unit continuously monitors the integrity of GNSS correction data and provides feedback to the control unit. Based on this feedback, the control unit dynamically adjusts whether to use GNSS-based positioning, ensuring safety while maintaining productivity when conditions are favorable
Data Source
AI summary
The disclosure concerns a method for GNSS-based location of a vehicle having a GNSS location device in view of integrity information provided in relation to GNSS correction data, comprising at least the following steps: (a) receiving GNSS correction data for correcting delay measurements for GNSS-based location from a GNSS correction data provision system, (b) receiving at least one piece of integrity information about the reliability of the GNSS correction data from the GNSS correction data provision system, (c) evaluating the at least one piece of integrity information about the reliability of the GNSS correction data that was received in step (b), and (d) influencing GNSS-based location of the vehicle on the basis of the evaluation from step (c).