Link Switching Control for GNSS Signal Reliability
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Solution Overview
Problem
The accuracy of global navigation satellite systems (GNSS) positioning is compromised due to unreliable satellite-to-earth communication links, which can be affected by environmental factors, leading to interrupted or weak signal reception.
Innovation Solution
A control method and device for link switching that evaluates signal quality and switches between a primary satellite-to-earth link and an auxiliary wireless communication network to ensure continuous and accurate data reception for positioning, using a receiver, network interface, and controller to decode signals and determine when to switch between links based on predetermined standards and thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the system relies solely on the satellite-to-earth link for receiving correction data, then the positioning system maintains simplicity in architecture, but the reliability of data reception deteriorates due to environmental factors causing weak or interrupted signals
Solution Approach 1:
The system dynamically changes the operational state of communication links based on signal quality parameters. The controller monitors signal strength and switches between satellite link and wireless network link according to predefined threshold parameters, optimizing reliability without requiring permanent activation of all components
Solution Approach 2:
The controller acts as an intermediary that manages the switching between the satellite-to-earth link and the wireless communication network. It evaluates signal quality and automatically selects the appropriate data reception path, resolving the contradiction by introducing intelligent control logic that activates auxiliary systems only when needed
2Reliability
If the system continuously monitors and switches between satellite link and wireless network link, then the reliability of positioning data reception improves, but the complexity of signal evaluation and control increases
Solution Approach 1:
The system performs preliminary evaluation of signal quality parameters before switching is required. By continuously monitoring signal strength and predicting potential interruptions, the controller can proactively switch to the wireless network link before complete signal loss occurs, ensuring continuity while using simple threshold-based decision logic
Solution Approach 2:
The system implements self-service through automatic link selection based on predefined criteria. The controller autonomously evaluates signal quality and performs switching operations without external intervention, using simple comparison logic against threshold values to maintain positioning data continuity
Data Source
AI summary
A control method and control device for link switching is disclosed. The control method includes (i) receiving a current coded signal from a main data link, the current coded signal containing coded application data, (ii) decoding the current coded signal to determine signal quality, (iii) evaluating a historical coded signal transmitted via the main data link, and (iv) and determining, on the basis of the signal quality and an evaluation result of the historical coded signal, whether to switch to an auxiliary data link to receive the application data.