Network-Based Location Error Estimation Using AGPS Baseline
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Solution Overview
Problem
Conventional network-based mobile locating techniques lack accurate quality measures for understanding the accuracy of location estimation results, which is crucial for providing reliable location-centric services and improving network performance.
Innovation Solution
The method employs Assisted Global Positioning System (AGPS) based locating results as a baseline to determine error rates in network-based locating results by comparing approximate location data with precise location data received simultaneously, allowing for the calculation of error rates associated with approximate locations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If network-based locating techniques are used, then implementation is non-intrusive and does not affect the UE, but the accuracy of location estimation results is insufficient
Solution Approach 1:
The patent introduces AGPS (Assisted Global Positioning System) as an intermediary mechanism that bridges network-based locating techniques with GPS-based precise location data. The network server receives both network-based location estimates and AGPS location data, compares them, and uses the AGPS data to correct and refine the network-based estimates, thereby improving accuracy without requiring direct GPS hardware in the UE.
Solution Approach 2:
The patent implements a feedback mechanism where the network server continuously compares network-based location estimation results with AGPS location data and uses the discrepancies to calculate error rates. These error rates are fed back to improve the network-based locating algorithms, allowing iterative refinement of location accuracy while maintaining the non-intrusive network-based approach.
2Productivity
If timing-based location methods are used, then location estimation can be performed, but quality measures and accuracy of results are not provided
Solution Approach 1:
The patent establishes a feedback loop where the network server receives network-based location estimates, compares them with AGPS location data, calculates error rates, and uses these error rates to assess the reliability of timing-based location methods. This feedback mechanism provides quantitative quality measures that enable evaluation and improvement of the location estimation process.
Solution Approach 2:
The patent replaces purely mechanical timing-based location calculations with a hybrid approach that incorporates AGPS satellite-based positioning. By substituting part of the mechanical timing measurement system with AGPS data, the system gains access to more reliable and accurate location information while maintaining the network-based processing architecture.
Data Source
AI summary
Systems and techniques for determining the accuracy of network based user equipment (UE) locating methods and results thereof are disclosed. Periodic direct measurements of location error for a network based location result are determined by the difference in the network based location result and an assisted global positioning system (AGPS) location result. The location error is associated with a cell-pair contributing to data employed to determine the network based location result. The error associated with the cell-pair is then applied as a measure of accuracy in future network based location results that also employ data associated with the cell-pair to determine the future network based location result.