UE Positioning Model Using Wi-Fi and Uu Signal Fusion
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Solution Overview
Problem
Current wireless communication systems, particularly 5G NR, face challenges in improving positioning accuracy due to interference from environmental structures and the limited availability of universal mobile telecommunications system terrestrial radio access network (Uu) signals in indoor and close-to-indoor areas.
Innovation Solution
The proposed solution involves a positioning system that utilizes a positioning model, such as an AI/ML model, to calculate the location of a user equipment (UE) by measuring Wi-Fi reference signals (RSs) during measurement gaps and combining these measurements with Uu RSs, leveraging the ubiquity of Wi-Fi access points to enhance positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If only Uu signals are used for positioning, then the positioning system maintains simplicity, but positioning accuracy deteriorates in indoor and close-to-indoor areas due to limited availability and environmental interference
Solution Approach 1:
The patent combines measurements from multiple wireless signal types (Uu signals from 5G NR and Wi-Fi signals) into a unified positioning model. The UE measures both Uu reference signals and Wi-Fi reference signals, and the positioning model processes these combined measurements to determine position, thereby achieving improved accuracy and environment adaptability through signal fusion
Solution Approach 2:
The positioning model is designed to handle multiple types of wireless signals (both cellular Uu signals and Wi-Fi signals) through a universal measurement framework. The model can process measurements from different signal types using the same measurement gaps and configuration mechanisms, making the positioning system versatile across different radio access technologies and environments
2Measurement precision
If measurement gaps are allocated for Wi-Fi signal reception, then positioning accuracy improves through additional measurement data, but time resources are reduced for Uu signal communication
Solution Approach 1:
The patent implements periodic measurement gaps that are regularly allocated within the communication timeline. These measurement gaps occur at specific periodic intervals, allowing the UE to periodically switch to Wi-Fi signal reception for positioning measurements while maintaining Uu signal communication at other times, thus balancing positioning accuracy with communication time resources
Solution Approach 2:
The time resources are segmented into distinct measurement gaps and communication periods. During measurement gaps, the UE dedicates time to Wi-Fi signal reception, while during non-gap periods, full Uu signal communication is available. This temporal segmentation allows both positioning and communication functions to operate effectively without continuous interference
Data Source
AI summary
A user equipment (UE) may receive a Wi-Fi positioning configuration comprising a set of measurement gaps for a reception of a set of Wi-Fi reference signals (RSs). The UE may receive the set of Wi-Fi RSs during the set of measurement gaps. The UE may measure the set of Wi-Fi RSs. The UE may calculate a position of the UE using a positioning model based on the measured set of Wi-Fi RSs. The UE may transmit a report message comprising the calculated position of the UE. The UE may receive and measure a set of UE-to-universal mobile telecommunications system terrestrial radio access network (UE-UTRAN) (Uu) RSs during a second set of measurement gaps configured by a Uu positioning configuration. The UE may calculate the position of the UE using the positioning model further based on the measured set of Uu RSs.