Navigation System Adaptive Coverage Area Positioning Mode Switch
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Solution Overview
Problem
Navigation systems face challenges in providing timely, accurate, and reliable location-based services, especially in areas with compromised GPS coverage due to urban canyons or satellite geometry, leading to impaired positioning quality.
Innovation Solution
A method that determines coverage quality at a location, generates an adaptive coverage area, and selects a preferred positioning mode for effective operation within that area, using modules for signal measurement, delineation, and mode selection to switch between GPS, cellular-tower, or other location systems as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS positioning mode is used in areas with poor coverage, then positioning accuracy deteriorates, but switching to alternative positioning modes increases power consumption
Solution Approach 1:
The system dynamically changes positioning parameters by switching between different positioning modes (GPS, cellular tower, WiFi) based on coverage quality assessment. When GPS coverage quality falls below a threshold, the system transitions to alternative positioning modes, and when coverage quality improves, it returns to GPS mode, thereby optimizing the balance between positioning accuracy and power consumption
Solution Approach 2:
The system implements a feedback mechanism by continuously assessing GPS coverage quality and using this information to make informed decisions about mode switching. The coverage quality assessment feeds back to the mode selection logic, enabling the system to adapt its positioning strategy in real-time based on actual signal conditions
2Reliability
If the system continuously monitors coverage quality to maintain accuracy, then responsiveness improves, but system complexity increases
Solution Approach 1:
The system divides the monitoring function into discrete, modular components: a coverage quality assessment module that evaluates signal conditions and a mode selection module that decides when to switch positioning modes. This segmentation allows the system to maintain reliability through continuous monitoring while managing complexity by organizing functions into independent, manageable modules with clear interfaces
3Measurement precision
If the system switches to alternative positioning modes in poor coverage areas, then positioning accuracy improves, but response time increases due to mode switching overhead
Solution Approach 1:
The system performs preliminary assessment of coverage quality before positioning accuracy deteriorates significantly. By continuously monitoring coverage conditions and predicting when accuracy will fall below acceptable thresholds, the system can proactively switch to alternative positioning modes before problems occur, reducing the time loss associated with reactive mode switching
Data Source
AI summary
A method of operation of a navigation system includes: obtaining a first coverage location; determining a first coverage quality at the first coverage location is below a predefined threshold; generating an adaptive coverage area around the first coverage location for displaying on a device; selecting a preferred mode for positioning fix associated with the adaptive coverage area; and operating the preferred mode inside the adaptive coverage area.