Vehicle Location Correction Using Roadside Infrastructure
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Solution Overview
Problem
Current GNSS systems face reliability issues due to signal interference or distortion, leading to degraded location accuracy, especially when signals are not received or are distorted, and existing techniques like DGPS require complex calculations and additional infrastructure.
Innovation Solution
A method that corrects vehicle location information by using fixed absolute location information from infrastructure devices, determining the vehicle's location based on the presence and number of infrastructure devices within a reference distance, and applying error correction using triangulation or recent location data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If DGPS technology is used to improve location precision, then measurement precision is improved, but device complexity increases due to requiring two GPS receivers and complex calculations
Solution Approach 1:
The patent introduces infrastructure devices (roadside units) as intermediaries between the vehicle's GPS receiver and the location determination system. These infrastructure devices provide reference location information and assist in calculating accurate vehicle location, eliminating the need for dual GPS receivers while maintaining high precision through cooperative positioning
2Measurement precision
If DGPS technology is used to improve location precision, then measurement precision is improved, but ease of operation deteriorates due to requiring various variables and complex calculation processes
Solution Approach 1:
The infrastructure devices perform preliminary calculations and prepare reference location information in advance. By pre-processing the positioning data and maintaining databases of infrastructure device locations, the system reduces the computational burden on the vehicle's onboard system, making the operation simpler while maintaining high precision
3Ease of operation
If GNSS signal reception is relied upon for location determination, then ease of operation is maintained, but reliability deteriorates when signals are distorted or not received due to natural phenomena or electronic interference
Solution Approach 1:
The system implements feedback mechanisms where infrastructure devices continuously monitor and provide reference location information to verify and correct GPS-derived location data. This feedback loop enables the system to detect and compensate for signal distortions or reception failures, maintaining high reliability while keeping the operation simple through automated correction processes
Data Source
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AI summary
A method for determining the location of a vehicle may include: determining, by a controller (300), whether first location information of a vehicle is normally received through a GNSS (Global Navigation Satellite System) receiver (100); determining whether two or more infrastructure devices (20) exist within a reference distance from the vehicle; and determining the location of the vehicle according to whether the first location information of the vehicle is normally received and whether two or more infrastructure devices exist.