PRS Phase Error Reporting via Frequency Domain Stitching
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Solution Overview
Problem
Existing wireless communication systems face challenges in accurately determining the position of user equipment (UE) due to phase errors in the reporting of positioning reference signals (PRS), which are exacerbated by the higher frequencies and denser deployments in 5G networks.
Innovation Solution
The implementation of frequency domain PRS stitching techniques to align and synchronize PRSs across multiple transmission/reception points (TRPs) within the 5G network, ensuring accurate phase alignment and reducing reporting errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If higher frequency bands and denser deployments are used in 5G networks, then data transfer speeds and coverage are improved, but phase errors in PRS reporting increase
Solution Approach 1:
The patent introduces a location server as an intermediary that collects PRS measurements from multiple TRPs and performs centralized processing. The location server receives measurement reports containing phase information from multiple TRPs, calculates position information based on these reports, and determines UE location while compensating for phase errors through coordinated processing across multiple measurement points
Solution Approach 2:
The system implements feedback mechanisms where the location server receives measurement reports from UEs containing phase information, processes this information to determine position, and can send positioning information back to the UE or network entities. This feedback loop enables continuous refinement of positioning accuracy by utilizing phase measurements from multiple TRPs and adjusting for errors through iterative processing
2Measurement precision
If PRS measurements are taken from multiple TRPs, then positioning accuracy is improved, but phase alignment errors between TRPs increase
Solution Approach 1:
The location server acts as a central intermediary that collects PRS measurements from multiple TRPs and performs unified processing. By gathering measurement reports from multiple TRPs and calculating position information centrally, the location server can reconcile phase differences and maintain consistent positioning results across the network
Solution Approach 2:
The patent combines measurements from multiple TRPs at the location server to determine UE position. By merging phase information from multiple measurement points and processing them together through TDOA or other positioning methods, the system achieves more accurate positioning while compensating for individual TRP phase errors through the collective data
3Productivity
If TDD systems are used to increase network capacity, then spectral efficiency is improved, but phase errors in PRS reporting are introduced
Solution Approach 1:
The system uses feedback mechanisms where the location server receives measurement reports containing phase information from UEs, processes this information to determine position, and can send positioning information back. This feedback enables the system to identify and compensate for phase errors introduced by TDD operations through continuous measurement and adjustment
Solution Approach 2:
The location server serves as an intermediary that processes PRS measurements affected by TDD phase errors. By collecting measurements from multiple TRPs and performing centralized calculation, the location server can mitigate the impact of TDD-induced phase errors through coordinated processing across the network
Data Source
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AI summary
Disclosed are techniques for wireless communication. In detail, techniques are proposed for including the phase shift of stitching PRS in the PRS assistance information provided to a receiver.