High-Speed UE Positioning With Fine-Grained Reference Signal Timing
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Solution Overview
Problem
The 3GPP Rel-16 standard faces challenges in maintaining accurate positioning for user equipment moving at high speeds due to Doppler shift, leading to a decline in positioning accuracy performance.
Innovation Solution
A positioning method that involves acquiring and receiving positioning reference signals from multiple entities at different moments with a measurement granularity less than or equal to an orthogonal frequency division multiplexing symbol, and utilizing various measurement quantities and quality indications to improve accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If positioning reference signals are received at multiple moments with fine granularity to improve positioning accuracy for high-speed UE, then measurement complexity and processing overhead increase
Solution Approach 1:
The positioning measurement process is segmented into multiple discrete measurement moments with fine granularity (less than or equal to OFDM symbol duration). By dividing the continuous measurement into discrete time segments, the system can capture position information at critical instants while managing computational complexity through structured sampling rather than continuous processing.
Solution Approach 2:
Positioning reference signals are received at periodic measurement moments rather than continuously. The system performs positioning measurements at specific time intervals (multiple moments) with periodic sampling, reducing overall processing load while maintaining accuracy for high-speed moving UEs by capturing position at representative instants within each period.
2Measurement precision
If positioning measurements are performed at multiple moments to overcome Doppler shift effects, then the time required for positioning increases
Solution Approach 1:
Positioning reference signals are pre-configured and transmitted at multiple predetermined moments before the actual positioning calculation is performed. By preparing measurement opportunities in advance at optimized time points, the system reduces the reactive processing time needed while ensuring sufficient data points are available to compensate for Doppler effects in high-speed scenarios.
Solution Approach 2:
The positioning measurement process maintains continuous useful action by performing measurements at multiple consecutive moments rather than using a single isolated measurement. This continuous multi-moment sampling ensures that position information is continuously updated throughout the measurement window, allowing the system to track and compensate for high-speed motion without gaps in positioning capability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances positioning accuracy for high-speed user equipment by mitigating the effects of Doppler shift and motion, ensuring precise location estimation across varying motion scenarios.
Implementation Method 1
the Doppler shift caused by high-speed movement will lead to a decline of positioning accuracy performance for user equipment moving at a high speed
Data Source
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AI summary
The present application provides a positioning method and apparatus for providing a positioning solution suitable for user equipment in various motion speed scenarios, ensuring positioning accuracy and avoiding a problem that positioning accuracy performance for user equipment moving at a high speed is declined. The method provided by the present application includes: acquiring positioning reference signal configuration information, where the positioning reference signal configuration information is positioning reference signal configuration information for a plurality of positioning reference signal sending entities at a plurality of moments; and receiving, according to the positioning reference signal configuration information, positioning reference signals sent by the plurality of positioning reference signal sending entities at the plurality of moments, and performing positioning measurement, where a granularity of a measurement moment is less than or equal to an orthogonal frequency division multiplexing symbol.