Vehicle Positioning Controller Switching GNSS and Sensor Data
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Solution Overview
Problem
Existing vehicle positioning systems face challenges in maintaining accuracy and reliability, particularly when GNSS signals are weak or when auxiliary navigation devices fail or are not mounted, leading to potential disruptions in services like stolen vehicle tracking.
Innovation Solution
A positioning device with a controller that selectively switches between a first positioning system using internal GNSS signals and a second system utilizing vehicle-related information from sensors and navigation devices, ensuring high accuracy by choosing the most reliable system based on conditions such as device availability and signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE-Based positioning is used, then positioning calculation is performed on the positioning device side with lower power consumption, but positioning accuracy deteriorates when GNSS signals are weak or unavailable
Solution Approach 1:
The patent combines multiple positioning methods (UE-Based positioning using GNSS signals and UE-Assisted positioning using vehicle-related information from sensors and navigation devices) into a unified positioning system. The controller integrates these methods and selectively switches between them based on signal availability and accuracy requirements, thereby maintaining both continuity and accuracy under various conditions
Solution Approach 2:
The positioning system dynamically adapts its behavior by monitoring GNSS signal strength and availability. When signals are strong, it uses UE-Based positioning; when signals are weak or unavailable, it switches to UE-Assisted positioning using vehicle sensors. This dynamic switching optimizes both accuracy and continuity in real-time
2Measurement precision
If UE-Assisted positioning is used, then positioning accuracy is improved by using vehicle-related information, but power consumption increases due to additional communication with positioning server
Solution Approach 1:
The system uses UE-Assisted positioning only partially - specifically when needed to improve accuracy (e.g., when GNSS signals are weak). Otherwise, it relies on UE-Based positioning which consumes less power. This partial application of the more resource-intensive method achieves accuracy improvements without continuously sacrificing power efficiency
3Reliability
If multiple positioning systems are integrated, then positioning reliability is improved by having backup systems, but device complexity increases
Solution Approach 1:
The controller is designed with multi-functionality to handle both UE-Based and UE-Assisted positioning operations, as well as the switching logic between them. By consolidating these functions in a single controller rather than separate systems, the patent reduces overall device complexity while maintaining the reliability benefits of multiple positioning methods
Data Source
AI summary
A positioning device measures a position of a vehicle by including a controller. The controller provides (i) a first positioning system to obtain a first positioning result having a first accuracy by performing positioning using a signal from a GNSS satellite and (ii) a second positioning system to obtain a second positioning result having a second accuracy higher than the first accuracy, by using acquired vehicle-related information, instead of or in addition to the first positioning result. The controller selects, as a selected positioning system to obtain a selected positioning result, either (i) the first positioning system or (ii) the second positioning system. In response to determining that the second accuracy of the second positioning result is lower than the first accuracy of the first positioning result, the controller is configured to switch the selected positioning system to select the first positioning system.