Vehicle Location Correction Using V2V Reference and GNSS Mapping
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Solution Overview
Problem
Existing vehicle location determination systems using GNSS satellite technology face inaccuracies due to atmospheric delays, which introduce differential errors in location determination, especially in scenarios where satellite signals are unreliable.
Innovation Solution
A system that includes a receiver on a first vehicle capable of receiving satellite signals and communication from a second vehicle, utilizing a detector to determine the positional relationship between vehicles and a processor to apply a corrective mapping with section-specific correction factors to correct location inaccuracies based on satellite signals and vehicle-to-vehicle communication, including a Basic Safety Message (BSM) for reliability assessment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GNSS satellite technology is used for vehicle location determination, then location information can be obtained, but atmospheric delays introduce differential errors that reduce location accuracy
Solution Approach 1:
The patent uses a second vehicle as an intermediary to provide reference location information. The receiver on the first vehicle obtains location data from the second vehicle via V2V communication, which serves as a mediator to correct the atmospheric delays affecting direct satellite signal measurements. This intermediary approach allows the first vehicle to compensate for signal reliability issues by referencing another vehicle's more accurate location determination.
Solution Approach 2:
The patent applies parameter changes by using correction factors that adjust the location parameters based on atmospheric conditions. The system determines correction factors from the difference between satellite-based location and V2V-based location, then applies these parameter adjustments to improve measurement precision under varying atmospheric delay conditions.
2Measurement precision
If correction factors are applied to correct satellite signal errors, then location accuracy improves, but system complexity increases due to multiple correction mechanisms
Solution Approach 1:
The patent segments the field of view into multiple sections, each with its own correction factor. This segmentation allows the system to handle different atmospheric delay conditions in different sky regions independently. The receiver determines correction factors for each section based on satellite geometry and applies the appropriate correction factor to each satellite signal, improving location accuracy while managing complexity through structured organization.
Solution Approach 2:
The patent applies partial correction by using only the necessary correction factors for the visible satellites in each field of view section. Rather than applying uniform correction to all signals, the system selectively applies corrections where needed based on satellite position and atmospheric delay characteristics, optimizing the balance between accuracy improvement and system complexity.
Data Source
AI summary
A system for determining vehicle location information includes a receiver supported on a first vehicle for receiving a communication from a second vehicle and a signal from each of a plurality of satellites. A detector is configured to detect a positional relationship between the first vehicle and the second vehicle. A processor is configured to determine a location of the first vehicle from received satellite signals, a location of the second vehicle based on the communication received from the second vehicle, a corrected location of the first vehicle based on the location of the second vehicle and the positional relationship between the vehicles, and a corrective mapping of a plurality of sections of a field of view of the receiver. Each section has ad correction factor for correcting a subsequently determined location of the first vehicle based on satellite signals received from satellites appearing in the respective sections.