Ego Position Correction Using V2X Distance Thresholds
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In vehicle-to-X communication systems, existing methods for determining ego position accuracy are impaired by GNSS signal disruptions, leading to increasing inaccuracies without new GNSS position detection, especially in cooperative road user recognition scenarios where positional information is undefined and may not directly relate to the receiving road user.
Innovation Solution
A method that uses V2X messages for cooperative road user recognition to correct ego position by determining the distance between the ego position and externally determined positional information, with threshold-based correction and confidence information integration, leveraging infrastructure apparatus for precise detection and communication, without requiring hardware changes or additional costly resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If coupled navigation using acceleration sensors and yaw sensors is used to improve position detection when GNSS signals are impaired, then position information can be maintained during signal disruption, but sensor detection errors accumulate over time and distance leading to increasing inaccuracy
Solution Approach 1:
The patent implements a feedback mechanism where V2X messages from other road users provide external position references that feed back into the ego vehicle's position estimation system. This feedback loop allows the system to detect and correct drift accumulation from coupled navigation by comparing against independently determined positions of other road users, thereby maintaining long-term accuracy without continuous GNSS signals.
Solution Approach 2:
The patent introduces V2X communication as an intermediary element between the ego vehicle's position detection system and external reference frames. Instead of directly relying on accumulating sensor data or continuous GNSS signals, the system uses V2X messages as a mediator to transfer position information from other road users, enabling indirect position verification and correction without direct hardware modifications.
2Measurement precision
If V2X messages for cooperative road user recognition are used to correct ego position, then positioning accuracy is improved without hardware changes, but positional information from V2X messages may be undefined or not directly relate to the receiving road user
Solution Approach 1:
The patent changes the parameter being measured from direct ego vehicle sensors to external road user positions received via V2X messages. By shifting the reference frame to other road users' positions and using relative position calculations, the system transforms ambiguous absolute position data into meaningful relative position information that can be used for ego vehicle position correction.
Solution Approach 2:
The patent replaces the mechanical sensor-based position detection system with an information-based V2X communication system. Instead of relying solely on physical sensors that accumulate errors, the system substitutes communication-based position information from other road users, eliminating the need for additional positioning hardware while improving accuracy through information exchange.
3Measurement precision
If threshold-based correction using V2X messages is applied to correct ego position, then positional ambiguities are reduced, but correction is only possible when distance to threshold criteria is met limiting continuous correction
Solution Approach 1:
The patent implements a dynamic correction strategy where the threshold for applying V2X-based position correction is not fixed but adapts based on operational conditions. The system dynamically adjusts when correction is applied by evaluating distance thresholds and confidence levels, allowing continuous position refinement when conditions permit while maintaining system stability when V2X data is unavailable or unreliable.
Data Source
AI summary
A method for ascertaining an ego position of an electronic device, having the steps: ascertaining an ego position of the electronic device by a position-detecting apparatus of the electronic device, ascertaining, by a computing apparatus for processing the data of the electronic device, a position of a road user using positional information comprising a received vehicle-to-X message in respect of cooperative road user recognition, ascertaining, by the computing apparatus or a further computing apparatus for processing data, a distance between the ascertained ego position and the position ascertained using the received positional information, correcting the ascertained ego position using the positional information to form a corrected ego position if the distance is less than or equal to a threshold value. An electronic device, the use of the electronic device as well as a corresponding system as also disclosed.