Dilution of Precision-Assisted Positioning Reporting for 5G Latency
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Solution Overview
Problem
Existing wireless positioning technologies in 5G networks face challenges in achieving precise and efficient location estimation due to high latency and the need for improved spectral efficiency and signaling efficiency, particularly in complex network environments with multiple TRPs and diverse frequency ranges.
Innovation Solution
The implementation of precision-assisted reporting for low latency positioning involves the use of enhanced positioning reference signals (PRS) and iterative estimation processes by the gNB, utilizing quasi-co-location relationships between TRPs to refine location estimates, and incorporating satellite and terrestrial network signals for improved accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional wireless positioning methods are used in 5G networks, then positioning functionality is provided, but latency is high and positioning accuracy is insufficient
Solution Approach 1:
The network pre-configures positioning reference signals (PRS) and positioning assistance information before positioning is needed. The gNB pre-processes reference signal measurements and prepares positioning data, so that when positioning is requested, the UE can immediately use pre-computed information, eliminating the need for real-time signal processing and reducing latency while maintaining accuracy
Solution Approach 2:
The UE performs autonomous positioning calculations using pre-received assistance information and reference signal measurements. The device independently computes its position without requiring continuous network coordination or real-time processing requests, reducing signaling overhead and latency while achieving accurate positioning through self-contained measurement and calculation procedures
2Measurement precision
If multiple TRPs and frequency ranges are used to improve positioning accuracy, then positioning precision increases, but signaling overhead and network complexity increase
Solution Approach 1:
The positioning reference signals and assistance information structures are designed to be universal and configurable across multiple TRPs and frequency ranges. A single positioning configuration framework supports diverse deployment scenarios (different numbers of TRPs, different frequency combinations) without requiring separate signaling procedures for each case, reducing network complexity while enabling accurate multi-TRP positioning
Solution Approach 2:
The system dynamically adjusts positioning parameters such as reference signal bandwidth, frequency range selection, and TRP configuration based on network conditions and accuracy requirements. By changing these parameters rather than always using maximum configurations, the system achieves required positioning accuracy with minimal signaling overhead and network complexity
Data Source
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AI summary
Disclosed are techniques for wireless positioning. In an aspect, a user equipment (UE) performs one or more positioning measurements of positioning reference signals (PRS) transmitted by at least one set of transmission-reception points (TRPs) of one or more sets of TRPs, wherein each set of TRPs of the one or more sets of TRPs satisfies a dilution of precision (DOP) threshold (910), and reports the one or more positioning measurements or location information derived from the one or more positioning measurements (920).