UWB Reference Calibration for WiFi and BLE Location Accuracy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional location calibration techniques for mobile devices in specific venues are time-consuming and prone to errors due to the complexity of combining different location measurements from various wireless technologies like WiFi, Bluetooth Low Energy (BLE), and ultra-wideband (UWB), which makes accurate location determination challenging.
Innovation Solution
An automated calibration method that utilizes UWB location measurements as a reference to calibrate mid-to-low accuracy location technologies such as WiFi and BLE, by collecting and associating non-UWB location measurements with grid locations, thereby improving the accuracy of location determination without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional manual calibration techniques are used for location measurements, then calibration can be performed, but the process is time-consuming and prone to errors
Solution Approach 1:
The system performs automated self-calibration by collecting location measurements from multiple wireless technologies (WiFi, BLE, UWB) and automatically computing calibration parameters without requiring manual intervention. The location server autonomously processes the calibration data and updates the calibration records, eliminating the need for time-consuming manual calibration while maintaining high accuracy.
2Measurement precision
If multiple different location technologies and measurements are combined, then location determination accuracy can be improved, but the complexity of calibration increases significantly
Solution Approach 1:
The location server implements a universal calibration framework that handles multiple wireless technologies (WiFi RSSI, BLE ToF, UWB TWR) through a single automated calibration process. The system collects measurements from all technologies and applies unified calibration algorithms, allowing one system to perform multiple calibration functions simultaneously without increasing operational complexity.
Solution Approach 2:
The location server acts as an intermediary that centralizes the calibration process for all wireless technologies. Instead of calibrating each technology separately through complex manual procedures, the server collects measurements from all sources and performs automated calibration, simplifying the overall process while maintaining the benefits of multi-technology integration.
3Reliability
If manual data gathering is used for calibration, then calibration can be performed, but it is time-consuming and error-prone
Solution Approach 1:
The system replaces manual mechanical calibration procedures with automated electronic calibration. Instead of manually collecting and processing calibration data, the location server automatically gathers location measurements from multiple wireless technologies and computes calibration parameters through automated algorithms, significantly improving both reliability and efficiency.
Data Source
AI summary
A location server collects from access points at known locations in a venue, which is represented by grid locations defined by parameters accessible to the location server, (i) ultra wideband (UWB) location measurements for a UWB location technology based on UWB transmissions from mobile devices in the venue, and (ii) non-UWB location measurements for non-UWB location technologies based on non-UWB transmissions from the mobile devices. The location server associates the non-UWB location measurements for the non-UWB location technologies with the grid locations, using the UWB location measurements as reference measurements. The location server populates location calibration records for the grid locations of the venue with the non-UWB location measurements associated with the grid locations. The location server calibrates the non-UWB location technologies at the grid locations based on the non-UWB location measurements in the location calibration records associated with the grid locations.