On-Demand PRS Framework for UE Positioning
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in efficiently reducing power consumption and latency during user equipment (UE) positioning sessions, as they rely heavily on dedicated positioning reference signals (PRS) that consume resources and energy.
Innovation Solution
The solution involves an on-demand PRS framework where base stations are requested to report their capability to formulate or transmit PRS, allowing for the selection of appropriate base stations and signal patterns for UE positioning, enabling the reuse of communication reference signals for positioning measurements, thereby reducing power consumption and latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If dedicated positioning reference signals (PRS) are used for UE positioning, then positioning accuracy is improved, but power consumption and resource usage increase
Solution Approach 1:
The patent makes communication reference signals (TRS) serve dual purposes: both for communication channel tracking and for positioning measurements. By configuring TRS resources to be usable for both communication and positioning functions, the system eliminates the need for separate dedicated PRS resources, thereby reducing power consumption and resource usage while maintaining positioning accuracy
Solution Approach 2:
The patent combines the positioning function with existing communication reference signals (TRS). Instead of using separate dedicated PRS resources, the solution merges positioning measurements with the TRS that are already being used for communication, thereby reducing overall resource consumption and power usage while achieving the required positioning accuracy
2Measurement precision
If dedicated positioning reference signals (PRS) are used for UE positioning, then positioning accuracy is improved, but resource consumption increases
Solution Approach 1:
The patent makes communication reference signals (TRS) serve dual purposes: both for communication channel tracking and for positioning measurements. By configuring TRS resources to be usable for both communication and positioning functions, the system eliminates the need for separate dedicated PRS resources, thereby reducing resource consumption while maintaining positioning accuracy
Solution Approach 2:
The patent combines the positioning function with existing communication reference signals (TRS). Instead of using separate dedicated PRS resources, the solution merges positioning measurements with the TRS that are already being used for communication, thereby reducing overall resource consumption and achieving the required positioning accuracy
3Use of energy by moving object
If on-demand PRS framework is implemented, then power efficiency is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic switching between communication mode and RF sensing mode during different time durations of the TRS. The system can adaptively activate or deactivate positioning measurements based on demand, allowing the UE to switch between consuming less power (communication only) and consuming more power (communication plus positioning) as needed, thereby improving overall power efficiency while managing device complexity through controlled dynamic operation
Data Source
AI summary
Aspects presented herein may enable a network entity to configure other types of reference signals, such as reference signals configured for communications, for positioning measurements. In one aspect, a network entity, such as an LMF, transmits, to a plurality of base stations, a request for a capability report indicating at least one of whether the plurality of base stations have a capability to formulate an RS for communication as a PRS for a UE positioning session or whether the plurality of base stations have a capability to transmit a PRS dedicated for positioning for the UE positioning session. The network entity receives, from each of the plurality of base stations, the capability report. The network entity selects at least some of the plurality of base stations and a signal pattern configuration for the UE positioning session based on the capability report received from each of the plurality of base stations.