Trust Transfer Between WAN and AP Databases for Positioning Accuracy
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Solution Overview
Problem
Current radio location systems face challenges in maintaining the integrity of position estimates due to the mobility of access points and the variability in trustworthiness of Wide Area Network (WAN) and Access Point (AP) databases, leading to inaccuracies in determining the geographic position of mobile devices.
Innovation Solution
A method and system that dynamically update almanacs by transferring trustworthiness values between WAN base stations and APs, corroborating position estimates, and adjusting trustworthiness levels based on corroboration and error analysis to improve positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If access point position information is used for positioning, then positioning coverage is improved, but positioning accuracy deteriorates due to AP mobility and data integrity issues
Solution Approach 1:
The system implements feedback mechanisms where mobile devices report observed positions back to the network database. This feedback loop allows the system to detect and correct inaccuracies in AP position information over time, maintaining both wide coverage and improving accuracy through continuous validation and updates.
Solution Approach 2:
The patent dynamically adjusts parameters such as trust weights and validity flags for different access points based on observed performance and corroboration from multiple sources. This allows the system to adapt to changing conditions and maintain positioning accuracy while utilizing the broad coverage provided by numerous access points.
2Measurement precision
If WAN base station data is used for positioning, then positioning accuracy is improved, but coverage is limited compared to AP networks
Solution Approach 1:
The system merges positioning data from multiple sources including WAN base stations and local access points into a unified positioning solution. By combining these different data sources, the system achieves both the accuracy provided by WAN base stations and the extended coverage provided by access points, resolving the contradiction between precision and coverage.
3Loss of time
If access point databases are updated frequently to reflect mobility, then data currency is improved, but data integrity deteriorates due to unregistered moves
Solution Approach 1:
The system performs preliminary validation checks before updating the database with new access point position information. By pre-validating data sources and requiring corroboration from multiple independent observations, the system ensures that updates maintain integrity while still reflecting current positions, preventing spurious updates from unregistered moves.
Solution Approach 2:
The feedback mechanism allows the system to monitor and validate position updates in real-time. When an access point appears to have moved, the system receives feedback from multiple mobile devices and cross-validates the position information before committing updates, ensuring data integrity while maintaining currency.
4Reliability
If trustworthiness values are transferred between networks, then positioning reliability is improved, but system complexity increases
Solution Approach 1:
The system uses parameter changes by introducing trustworthiness weights that can be adjusted based on source reliability. This simple parameter adjustment allows the system to account for varying reliability of different networks and data sources without requiring complex algorithms, maintaining reliability while minimizing added complexity.
Data Source
AI summary
Techniques for transferring trust between networks are described herein. An example of a method of using a mobile device to transfer trust between networks described herein includes receiving WAN base station information including a WAN base station trustworthiness value, determining a WAN position estimate for the mobile device based on the WAN base station information, receiving access point information including an access point trustworthiness value, determining an access point position estimate for the mobile device based on the access point information, determining if the WAN position estimate and the access point position estimate are corroborated, and increasing the access point trustworthiness value if the WAN position estimate and the access point position estimate are corroborated and the WAN base station trustworthiness value is higher than the access point trustworthiness value.