Terminal Indoor Outdoor Positioning Switch
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Solution Overview
Problem
Current positioning methods for mobile terminals experience reduced precision and increased time when switching between indoor and outdoor areas, as they passively wait for the current positioning service to fail before switching to a new method, leading to suboptimal user experience.
Innovation Solution
The terminal actively detects the current positioning scenario and switches to a method with higher precision, using satellite information to determine when to switch from outdoor to indoor positioning services, and vice versa, by setting conditions based on the number of target satellites and distance to candidate buildings, thereby ensuring seamless and accurate location services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal passively waits for the current positioning service to fail before switching to a new positioning method, then the positioning service can maintain stability, but the positioning precision and switching speed are significantly reduced when moving between indoor and outdoor areas
Solution Approach 1:
The terminal proactively evaluates satellite signal conditions and predicts positioning service quality before complete failure occurs. By monitoring satellite quantity and signal strength in advance, the terminal can switch positioning methods preemptively, maintaining positioning precision during transitions between indoor and outdoor areas rather than waiting for service degradation.
Solution Approach 2:
The terminal continuously monitors satellite positioning service quality metrics (satellite quantity, signal strength) and uses this feedback to dynamically adjust positioning method selection. When satellite conditions meet preset thresholds indicating potential service degradation, the terminal triggers a switch to alternative positioning methods, ensuring continuous high-precision positioning.
2Device complexity
If the terminal passively waits for positioning service failure before switching methods, then the system complexity remains low, but the time consumed for switching positioning services increases significantly
Solution Approach 1:
The terminal performs preliminary assessment of satellite positioning service quality by monitoring satellite quantity and signal strength. When preset conditions are met (indicating impending service failure), the terminal proactively switches to alternative positioning methods in advance, significantly reducing the actual switching time experienced by the user.
Solution Approach 2:
The terminal dynamically adjusts positioning method selection based on real-time satellite signal conditions. The system transitions from a static, passive switching approach to a dynamic, condition-based approach where positioning methods are selected based on current environmental factors, optimizing switching speed without requiring complex manual configuration.
3Measurement precision
If the terminal uses GPS signal for outdoor positioning, then the positioning precision is high outdoors, but the positioning precision is significantly reduced when moving to indoor areas
Solution Approach 1:
The terminal dynamically selects positioning methods based on real-time satellite signal conditions. When satellite quantity or signal strength falls below thresholds (indicating indoor or obstructed environments), the terminal automatically transitions from GPS-based positioning to alternative methods such as Wi-Fi or base station positioning, maintaining adaptability across different environments while preserving high precision outdoors when GPS is available.
Solution Approach 2:
The terminal changes positioning method parameters based on satellite signal quality metrics. By monitoring satellite quantity and signal strength as key parameters, the system determines when to switch from outdoor-optimized GPS positioning to indoor-optimized alternatives, ensuring high precision in each environment through parameter-based method selection.
Data Source
AI summary
A positioning method and apparatus include obtaining, by a terminal, an outdoor positioning result using an outdoor positioning service, attempting, by the terminal when information about a satellite that provides the outdoor positioning service meets a preset condition, to obtain an indoor positioning result using an indoor positioning service, where the preset condition indicates that the terminal has an indoor positioning requirement, and switching, by the terminal, from the outdoor positioning service to the indoor positioning service when the indoor positioning result is successfully obtained.