Vehicle Path History Correction for Lane Change Accuracy
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Solution Overview
Problem
Vehicle-to-X systems face inaccuracies in path history information when vehicles change lanes, leading to incorrect identification of occupied lanes and impaired functionality of local safety systems.
Innovation Solution
A method and system for broadcasting a basic safety message packet that includes corrective actions on path history entries based on sensor data, such as vehicle speed and steering wheel position, to enhance the accuracy of path history information by deleting or modifying entries upon detecting a lane change, and incorporating confidence scores and direction of the lane change.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If path history information is continuously recorded for safety systems, then the functionality of local safety systems is maintained, but the accuracy of path history information deteriorates when lane changes occur
Solution Approach 1:
The system performs preliminary detection of lane change events using sensor data (steering wheel angle, vehicle speed, lane markings) before the path history becomes inaccurate. By identifying the lane change event in advance, the system can proactively correct the path history entries to maintain accuracy while preserving continuous recording functionality.
Solution Approach 2:
The system uses feedback from multiple sensors (steering wheel position sensors, vehicle speed sensors, image sensors for lane marking detection) to monitor driving conditions and detect lane changes. This feedback mechanism enables the system to identify when path history accuracy is deteriorating and trigger corrective actions to restore accuracy.
2Measurement precision
If sensor data processing is enhanced to detect lane changes, then the accuracy of path history correction is improved, but the device complexity increases
Solution Approach 1:
The lane change detection system is segmented into multiple independent sensor modules, each responsible for specific detection tasks (steering wheel angle monitoring, vehicle speed measurement, lane marking recognition). This segmentation allows the system to achieve high detection accuracy through multiple specialized sensors rather than one complex sensor system.
Solution Approach 2:
The sensor system serves multiple functions: it monitors driving conditions for lane change detection, provides data for path history correction, and supports various local safety systems. This multi-functionality reduces the need for separate dedicated sensors for each function, thereby managing device complexity while maintaining detection accuracy.
Data Source
AI summary
A method for broadcasting a basic safety message (BSM) packet from a host vehicle includes receiving sensor data from one or more vehicle sensors provided at the host vehicle. The method includes determining whether the sensor data indicates a lane change of the host vehicle. The method includes performing a corrective action on at least one path history entry that is stored in a database in response to the sensor data indicating the lane change. The method includes generating and broadcasting the BSM packet based on the at least one path history entry.