Integrated Positioning Apparatus with Dynamic Weight Correction
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Solution Overview
Problem
Existing positioning systems, such as GNSS and WPS, face reliability issues in urban and indoor areas due to signal interference and sparse AP distribution, leading to positioning errors and decreased reliability.
Innovation Solution
An integrated positioning method and apparatus that combines different positioning schemes by acquiring and weighting estimated positions from multiple sources, such as GNSS and WPS, and adjusts these weights based on reference position information to produce a more accurate and reliable location estimate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GNSS service is used for positioning, then positioning accuracy is improved in open areas, but positioning reliability deteriorates in urban areas due to signal diffraction, reflection, and blocking
Solution Approach 1:
The patent combines multiple positioning schemes (GNSS, WPS, and other positioning methods) into an integrated positioning system. The terminal device acquires positioning results from different schemes, corrects their weights based on environment information, and integrates them to produce a final positioning result. This merging approach ensures that when GNSS signals are blocked or reflected in urban areas, other positioning schemes can compensate, thereby maintaining positioning reliability while preserving accuracy where available.
2Reliability
If WPS service is used for positioning, then positioning reliability is improved in indoor areas with dense AP deployment, but positioning accuracy deteriorates in outdoor areas with sparse AP distribution
Solution Approach 1:
The patent implements dynamic weight adjustment for different positioning schemes based on environment information. The terminal device acquires environment information (such as whether the location is indoor or outdoor, urban or suburban) and uses this to dynamically correct the weights of different positioning schemes. When WPS is the primary scheme in indoor areas, it receives higher weight, while in outdoor areas with sparse APs, other schemes receive higher weights. This dynamic adaptation resolves the contradiction by optimizing the contribution of each scheme according to the current environment.
3Reliability
If multiple positioning schemes are integrated, then positioning reliability is improved across different environments, but system complexity increases due to weight correction and integration processes
Solution Approach 1:
The patent manages system complexity by focusing parameter changes on the weight values of positioning schemes rather than redesigning the entire system architecture. The terminal device acquires environment information and uses it to adjust the weight parameters of different positioning schemes. This parameter-based approach allows the system to handle multiple positioning schemes efficiently by changing only the weight parameters based on environment, rather than implementing complex decision logic or multiple separate systems.
Data Source
AI summary
An integrated positioning apparatus acquires a first estimated position obtained by a first positioning scheme and a first weight for the first estimated position. The integrated positioning apparatus acquires a second estimated position obtained by a second positioning scheme and a second weight for the second estimated position. The integrated positioning apparatus corrects the first and second weights based on reference position information corresponding to position environment of a user. The integrated positioning apparatus integrates the first and second estimated positions to produce a third estimated position by using the corrected first and second weights.