Vehicle Position Determination Using Collaborative Correction Values
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Solution Overview
Problem
Existing methods for improving position determination accuracy in vehicles are limited by high expenditure requirements, reliance on specialized components, and restricted applicability due to the need for separate reference stations or stationary vehicles.
Innovation Solution
A method that utilizes any vehicle with navigation sensors, communication devices, and control devices to determine and transmit correction values for position and velocity, eliminating the need for specialized reference objects and enabling accurate position determination with reduced expenditure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If differential algorithms with reference stations are used to improve position accuracy, then position accuracy is improved, but expenditure increases
Solution Approach 1:
The patent makes ordinary navigation receivers perform the additional function of determining correction values, eliminating the need for specialized reference stations. Any receiver can now serve both as a user receiver and as a correction value provider, reducing system complexity and expenditure while maintaining high position accuracy through differential algorithms
Solution Approach 2:
The system enables navigation receivers to self-determine correction values using their own measurements and communications with other receivers. This self-service capability eliminates dependence on external specialized infrastructure, reducing expenditure while achieving accurate position determination through collaborative correction value sharing
2Measurement precision
If specialized reference stations are deployed to achieve high position accuracy, then position accuracy is improved, but device complexity increases
Solution Approach 1:
The patent eliminates specialized reference stations by enabling ordinary navigation receivers to perform correction value determination. This universalization reduces system complexity while maintaining the differential algorithm capability that provides high position accuracy
Solution Approach 2:
The patent merges the functions of user receivers and reference stations into a single unified system where all receivers can both consume and provide correction values. This consolidation eliminates the need for separate specialized infrastructure, reducing system complexity while achieving accurate positioning
3Measurement precision
If correction data is made available through third-party providers, then position accuracy is improved, but expenditure increases
Solution Approach 1:
The patent enables receivers to self-determine and share correction values directly with each other through communication means, eliminating dependence on third-party providers. This peer-to-peer correction value exchange reduces expenditure while maintaining high position accuracy through collaborative differential processing
4Measurement precision
If stationary vehicles are used as reference objects, then position accuracy is improved, but adaptability decreases
Solution Approach 1:
The patent enables both stationary and moving vehicles to serve as reference objects for determining correction values. This dynamic capability allows the system to adapt to various application scenarios including autonomous parking (stationary references) and autonomous driving (moving references), enhancing versatility while maintaining position accuracy
Solution Approach 2:
The patent makes all navigation receivers universal reference objects that can provide correction values regardless of their motion state. This universality expands adaptability to cover both stationary and moving applications while maintaining the differential algorithm capability for accurate position determination
Data Source
AI summary
A vehicle has a navigation sensor, a communication device, and a control device. A position signal of a global navigation satellite system is received by the navigation sensor. An estimated vehicle position is determined by the control device based on the at least one received position signal. An estimated relative velocity of the vehicle is determined with respect to the GNSS by the control device at least based on multiple received position signals of the GNSS. Correction values for the estimated vehicle position and the estimated relative velocity are received by the control device from a server based on the communication device. A corrected vehicle position and a corrected relative velocity are determined by the control device based on the received correction values. At least one of a pseudo-range, a Doppler shift, and a measured vehicle velocity are taken into consideration here by the control device.