Differential Positioning Base Station Selection at Coverage Junctions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing satellite positioning systems face inaccuracies due to interference from sunspots, weather, and electromagnetic interference, leading to suboptimal selection of ground reference stations and reduced positioning accuracy, especially at coverage junctions, and this can increase the cost and complexity of positioning terminals.
Innovation Solution
A method to determine the optimal ground reference station by calculating the distance between the roadside device's actual and calculated locations using differential positioning information, selecting the station with the smallest distance, and broadcasting this information to the terminal device, thereby improving accuracy without requiring a mobile communication network connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If satellite positioning is used, then positioning coverage is provided, but positioning accuracy is reduced due to interference from sunspots, weather, and electromagnetic interference
Solution Approach 1:
The patent introduces ground reference stations as intermediary devices to receive satellite positioning signals and provide differential positioning corrections. These stations act as mediators between the satellite positioning system and the terminal device, filtering out interference and providing corrected positioning information that compensates for sunspot, weather, and electromagnetic interference effects.
Solution Approach 2:
The system implements feedback by having ground reference stations continuously monitor satellite positioning signals and transmit corrected differential positioning information back to terminal devices. This feedback loop allows the system to detect and compensate for interference effects in real-time, improving positioning accuracy despite harmful environmental factors.
2Measurement precision
If ground reference stations are deployed nationwide to provide differential positioning, then positioning accuracy is improved, but device complexity and cost increase due to requirement for high-accuracy positioning functions and mobile communication modules
Solution Approach 1:
The patent uses copying by having ground reference stations pre-calculate and store differential positioning information that can be directly copied and applied by terminal devices. Instead of requiring terminals to perform complex real-time calculations, the system copies pre-processed positioning correction data from reference stations to terminals, simplifying terminal device complexity while maintaining high positioning accuracy.
Solution Approach 2:
The system extracts the complex positioning calculation functions from the terminal device and relocates them to the ground reference stations. By taking out these computational tasks and performing them centrally at reference stations, the patent eliminates the need for terminals to have high-accuracy positioning functions and complex mobile communication modules, thereby reducing device complexity.
3Ease of operation
If the nearest ground reference station is selected based on rough positioning, then positioning process is simplified, but positioning accuracy is reduced when located at coverage junctions of multiple stations
Solution Approach 1:
The patent implements dynamics by making the ground reference station selection adaptive rather than static. The system dynamically determines which reference station to use based on the terminal's actual position and the quality of positioning information from multiple stations. This dynamic selection process ensures optimal station choice even at coverage junctions, improving accuracy without significantly complicating the positioning process.
Solution Approach 2:
The system changes the selection parameter from simple distance-based nearest station selection to a multi-criteria evaluation that includes positioning accuracy, signal quality, and station coverage characteristics. By changing the selection parameters to consider multiple factors simultaneously, the patent improves positioning accuracy at coverage junctions while maintaining operational simplicity through automated parameter evaluation.
Data Source
AI summary
A base station determination method includes: acquiring differential positioning information of at least one base station; according to a received satellite positioning signal and at least one group of differential positioning information, respectively calculating a calculation position of a roadside device corresponding to the at least one group of differential positioning information; and determining a target base station from the at least one base station according to the calculation position of the roadside device and the actual position of the roadside device. The target base station is a base station that corresponds to differential positioning information corresponding to a calculation position, the distance between which and the actual position is the least.