NR Positioning Reference Signal Configuration for Beamforming
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Solution Overview
Problem
Current radio standards for New Radio (NR) positioning face challenges in beam-based operation, particularly at higher frequencies, due to the need for efficient reference signal utilization and accurate RSTD measurements, which are hindered by the complexity of beamforming and increased implementation costs.
Innovation Solution
The implementation of a positioning reference design that leverages SSB, NZP/ZP-CSI-RS, and DMRS resource configurations, enabling efficient RSTD measurements by configuring SSB and CSI-RS resources for multi-beam downlink channel control, and utilizing these resources for interference coordination and beam management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam-based operation is used for NR positioning at higher frequencies, then positioning capability is enabled, but reference signal overhead increases and implementation complexity increases
Solution Approach 1:
The patent makes SSB resources serve dual purposes: both for initial access and for positioning measurements. By configuring SSB as positioning reference signal, the system eliminates the need for separate PRS resources, thereby reducing overhead and complexity while maintaining positioning capability in beam-based operation
Solution Approach 2:
The patent merges the initial access function and positioning function into a single SSB resource configuration. The SSB that is used for cell search and initial access is also used for RSTD measurements, combining multiple functions into one resource to reduce system complexity
2Reliability
If beam-based operation is used for NR positioning at higher frequencies, then positioning capability is enabled, but reference signal overhead increases
Solution Approach 1:
The patent makes SSB resources serve dual purposes: both for initial access and for positioning measurements. By configuring SSB as positioning reference signal, the system eliminates the need for separate PRS resources, thereby reducing overhead and complexity while maintaining positioning capability in beam-based operation
Solution Approach 2:
The patent extracts the positioning function from the traditional separate PRS configuration and integrates it into the existing SSB framework, removing the need for additional dedicated positioning resources and reducing overall reference signal overhead
3Measurement precision
If cell-specific PRS is used for OTDOA positioning, then positioning is achieved, but beam-based operation compatibility is reduced
Solution Approach 1:
The patent introduces dynamic configuration of SSB resources for positioning purposes, allowing the system to adapt beam directions and SSB transmissions based on UE capabilities and positioning requirements. This dynamic approach enables RSTD measurements to work effectively with beam-based operation while maintaining measurement precision
Solution Approach 2:
The patent applies local quality by configuring SSB resources with specific properties suitable for positioning measurements. The SSB is configured with appropriate time-frequency resources, beam directions, and transmission parameters that optimize RSTD measurement accuracy in the context of beam-based operation
Data Source
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AI summary
A method includes receiving, at a terminal device, from at least one network device, positioning assistance information based on a predetermined resource configuration framework for positioning reference signals in a beamforming operation. The method also includes receiving a request for at least one measurement from the at least one network device, and determining the at least one measurement based on the predetermined resource configuration framework. The method further includes reporting, in response to the request, the at least one measurement based on the predetermined resource configuration framework.