Vehicle Positioning Correction via Broadcast Data Stream
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Solution Overview
Problem
Current vehicle locating systems using Global Navigation Satellite Systems (GNSS) are not accurate enough for advanced vehicle control, as they can only provide a position within a 10-50 feet radius, which is insufficient for precise identification relative to other vehicles on the road.
Innovation Solution
A system that includes a vehicle-mounted locating device to receive position data, a remote server to report correction factors for various locations, and a broadcast server to transmit these correction factors over a wireless data stream, allowing a correction device on the vehicle to extract the relevant factor and refine the vehicle's position based on its approximate location.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GNSS position data is used for vehicle locating, then the system can provide general navigation accuracy (10-50 feet), but the position accuracy is insufficient for advanced vehicle control applications
Solution Approach 1:
The patent introduces correction factors as an intermediary element between the GNSS system and the vehicle control system. These correction factors are generated by a remote server based on precise survey data and transmitted to the vehicle, where they modify the raw GNSS position data to achieve the required accuracy for advanced vehicle control applications.
Solution Approach 2:
The patent changes the parameter of position accuracy by applying correction factors to the GNSS data. The correction factors adjust the latitude, longitude, and altitude values to compensate for systematic errors in the GNSS measurements, thereby transforming the position data from general navigation accuracy to precision suitable for advanced vehicle control.
2Measurement precision
If correction factors are broadcast over wireless data stream, then position accuracy is improved, but system complexity increases
Solution Approach 1:
The patent employs a universal broadcast mechanism where a single wireless data stream carries correction factors that can be used by any vehicle in the coverage area. This multi-functional approach allows the same infrastructure to serve multiple vehicles simultaneously, reducing per-vehicle system complexity while maintaining high position accuracy.
Solution Approach 2:
The vehicle's onboard system automatically receives the broadcast correction factors and applies them to its GNSS data without requiring manual intervention or complex configuration. The system self-services by autonomously extracting the relevant correction factors based on its location and applying the appropriate adjustments to achieve precise positioning.
Data Source
AI summary
Methods and systems are provided for locating a vehicle. A locating device receives position data and determines an approximate position of the vehicle. A remote server reports a correction factor for each of a plurality of locations and a broadcast server broadcasts the correction factors over a wireless data stream. A receiver device receives the correction factors from the broadcast device and a correction device extracts a selected correction factor from the wireless data stream based on the location and the approximate position to determine a refined position of the vehicle.