UE Beam Lock Reporting for 5G Positioning Accuracy
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing beam lock information for angle-based positioning, particularly in 5G networks, where maintaining consistent receive and transmit beams is crucial for accurate location estimation but can be difficult due to varying channel conditions and UE mobility.
Innovation Solution
A method where a network entity requests a UE to perform positioning measurements using the same receive (RX) and/or transmit (TX) beam, and the UE reports its ability to comply or the degree of compliance, allowing for partial or full beam lock mode during normal operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE uses the same RX beam to receive multiple positioning reference signals from different TRPs, then positioning measurement accuracy is improved, but the UE may not be able to comply with the beam lock request under certain channel conditions or mobility scenarios
Solution Approach 1:
The UE applies beam lock partially by using the same RX beam for a subset of positioning reference signals when full beam lock is not feasible. The UE transmits a positioning measurement report indicating the degree of compliance (full or partial), allowing the network to understand the measurement conditions and adjust positioning calculations accordingly.
2Measurement precision
If the UE maintains beam lock during normal operations, then positioning accuracy is enhanced, but the system complexity increases due to additional beam management requirements
Solution Approach 1:
The system implements feedback mechanisms where the UE reports beam lock status and compliance degree to the network entity. This feedback allows the network to adjust positioning measurement requests and interpret measurements appropriately, reducing the complexity burden on the UE while maintaining positioning accuracy.
3Measurement precision
If the UE reports detailed beam lock compliance information, then positioning accuracy is improved, but signaling overhead between UE and network entity increases
Solution Approach 1:
The patent extracts only the essential beam lock compliance information needed for positioning accuracy into the positioning measurement report. Rather than reporting all possible beam parameters, the UE reports specifically the degree of compliance (full or partial) and relevant beam identification information, reducing signaling overhead while maintaining positioning precision.
Data Source
AI summary
Disclosed are techniques for wireless communication. In an aspect, a user equipment (UE) receives a positioning measurement request from a network entity, the positioning measurement request including a request to receive and/or to transmit a plurality of positioning reference signals from and/or to one or more transmission-reception points (TRPs) using the same receive (RX) beam and/or transmit (TX) beam, attempts, in response to reception of the positioning measurement request, to use the same RX beam and/or TX beam to receive and/or to transmit the plurality of positioning reference signals to perform positioning measurements, and provides a positioning measurement report to the network entity in response to the positioning measurement request, the positioning measurement report indicating using the same RX beam and/or the same TX beam and/or a degree of success with using the same RX beam and/or the same TX beam.