User Device PRS RSRP Reporting for 5G Positioning
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Solution Overview
Problem
Current 5G wireless systems face challenges in accurately reporting positioning reference signal (PRS) received path power (RSRPP) for the first path, which is essential for enhancing positioning accuracy, particularly in DL-AoD and UE-assisted positioning solutions.
Innovation Solution
The proposed solution involves a method where a user device receives a request to report PRS reference signal received power (RSRP) for a set of PRS resources corresponding to a previous report that indicated PRS RSRPP obtained at a specific time stamp using specific Rx beams and Rx branches. The user device then transmits a second report based on its status, including PRS RSRP and PRS RSRPP for the first path, to ensure accurate positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the user device reports PRS RSRP for a set of PRS resources corresponding to a previous report indicating PRS RSRPP, then the positioning accuracy is improved, but the reporting overhead and processing complexity increase
Solution Approach 1:
The patent applies preliminary action by having the user device store previously measured PRS RSRP values and their associated metadata (time stamps, Rx beam identifiers, Rx branch identifiers) in a buffer before being requested. When the LMF requests PRS RSRP for resources corresponding to a previous PRS RSRPP report, the device can retrieve these pre-stored values without performing new measurements, thus improving positioning accuracy while avoiding the complexity of real-time measurement and reporting procedures.
2Measurement precision
If the user device stores and retrieves previous measurement data for reporting, then the positioning accuracy is improved, but the memory requirements and data management complexity increase
Solution Approach 1:
The patent applies local quality by selectively buffering only the specific measurement data that is likely to be requested for positioning purposes. Instead of storing all possible measurement data, the device buffers PRS RSRP values associated with specific PRS resources, time stamps, Rx beams, and Rx branches that correspond to previous PRS RSRPP reports. This targeted approach ensures positioning accuracy is improved while minimizing memory requirements and data management complexity.
Data Source
AI summary
Systems, apparatuses and/or method for positioning are provided. One method may include receiving, by a user device, a first request. The first request may indicate to the user device to report positioning reference signal (PRS) reference signal received power (RSRP) for a set of PRS resources corresponding to a previous report which indicated5 PRS reference signal received path power (RSRPP) of the user device previously obtained at a first time stamp. The method may also include transmitting, by the user device, a second report based on at least one status of the user device.