Vehicle Unlocking Positioning Using Multi-Sensor Overlap Regions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicle keyless access systems rely on localization methods that provide rough estimations and are susceptible to errors and relay station attacks, necessitating an improved method for determining the position of a vehicle unlocking device.
Innovation Solution
A computer-implemented method using wireless technology, where sensors on a vehicle measure distances to the unlocking device, generating regions with inner and outer boundaries, determining overlap regions, and calculating the device's position based on overlap points, thereby accounting for measurement inaccuracies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If localization approach using field strength measurement is used, then keyless access can be implemented, but position determination accuracy deteriorates and susceptibility to relay station attacks increases
Solution Approach 1:
The patent replaces field strength measurement (electromagnetic approach) with time-of-flight measurement using wireless signals. This substitution provides more accurate distance measurements by measuring the time taken for signals to travel between sensors and the unlocking device, thereby improving position determination accuracy while maintaining keyless access functionality.
Solution Approach 2:
The patent introduces multiple sensors as intermediaries to measure distance to the unlocking device from different positions on the vehicle. These sensors act as mediators that provide multiple independent measurements, which are then combined through overlap region analysis to achieve accurate position determination while resisting relay station attacks.
2Reliability
If multiple sensors are used to improve position determination accuracy, then measurement reliability improves, but device complexity increases
Solution Approach 1:
The patent divides the vehicle into multiple sensor positions and processes each sensor's distance measurement independently to create separate regions. By segmenting the measurement process and combining results through overlap analysis, the system achieves high reliability without requiring a single complex measurement system.
Solution Approach 2:
The patent transforms multiple distance measurements from different sensor positions into a spatial overlap region analysis. This dimensional transformation converts complex multi-sensor data into a geometric problem where the intersection of regions identifies the unlocking device position, simplifying the processing complexity while maintaining high reliability.
Data Source
AI summary
A method for determining a position of a vehicle unlocking device relative to a position of a vehicle. The method includes receiving, from a plurality of sensors arranged at the vehicle, a distance indication from each sensor of the plurality of sensors. Each distance indication indicates a measured distance between the respective sensor and the vehicle unlocking device. The method includes generating, based on each measured distance, a region having an inner and an outer boundary. Each region is associated with one of the plurality of sensors. The method includes determining an overlap region according to an overlap of each of the regions. The method includes determining the position of the vehicle unlocking device according to the overlap region.