UE Time Calibration via SWTN Signal Measurements
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Solution Overview
Problem
The existing methods for determining a time calibration value for user equipment (UE) are costly and time-consuming, as they require manual calculation by manufacturers to account for hardware and software variations, which can slow down the manufacturing process and increase expenses.
Innovation Solution
A method is developed to estimate a time calibration value for UE by obtaining the location of terrestrial transmit stations, determining calibration information, and using this data to calculate the time calibration value, which can be aggregated and calculated by a server for groups of UEs sharing the same device model or operation mode, allowing for representative values to be used across similar devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual calculation of time calibration values is performed for each UE by manufacturers, then positioning accuracy is improved, but manufacturing cost and time increase
Solution Approach 1:
The UE automatically determines its own time calibration value by measuring signal arrival times from multiple base stations and calculating the difference between measured and expected arrival times, eliminating the need for manual manufacturer calibration while maintaining positioning accuracy
Solution Approach 2:
A server acts as an intermediary to collect signal measurement data from UEs and base stations, process the time difference information, and provide calibration values to multiple UEs, streamlining the calibration process across the network
2Manufacturing precision
If manual estimation of time calibration values is performed for each UE, then device-specific hardware variations are compensated, but manufacturing cost increases
Solution Approach 1:
The system changes the approach from static manual calibration to dynamic automated calibration, where time calibration values are determined based on actual signal propagation measurements rather than predetermined manufacturer estimates, accommodating hardware variations without increasing manufacturing cost
Solution Approach 2:
Each UE autonomously determines its time calibration value through network measurements, eliminating the expensive manual calibration process while still compensating for device-specific hardware variations through empirical data collection
3Productivity
If automated estimation of time calibration values is implemented, then manufacturing cost and time are reduced, but positioning accuracy may be compromised
Solution Approach 1:
The system uses feedback from actual signal arrival time measurements at multiple base stations to automatically determine accurate time calibration values for each UE, maintaining positioning precision while enabling automated high-volume manufacturing
Solution Approach 2:
The manual mechanical calibration process is replaced with an automated electronic measurement and calculation system that uses signal propagation time data to determine calibration values, improving manufacturing efficiency while maintaining accuracy through computational methods
Data Source
AI summary
In an embodiment, a given entity obtains a location of at least one terrestrial transmit station of a Synchronized Wireless Transmission Network (SWTN), transmit station calibration information associated with the at least one terrestrial transmit station and a location of a user equipment (UE) that is in wireless communication range with the at least one terrestrial transmit station. The given entity estimates the time calibration value for the UE based on the obtained transmit station location, the determined transmit station calibration information and the determined location of the UE. In another embodiment, a server obtains time calibration values that are estimated for each UE in the population of UEs. The server aggregates the estimated time calibration values based on device model and/or device operation mode, and calculates a representative time calibration value for UEs sharing the device model and/or device operation mode.