NR RedCap UE Positioning With PRS and DRX Alignment
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Solution Overview
Problem
Reduced capability (redcap) devices in new radio (NR) networks face challenges in providing accurate positioning and location services due to their lower bandwidth, reduced number of antennas, and other complexity reductions, which impact their ability to measure positioning reference signals effectively.
Innovation Solution
Implementing dedicated resources and configurations for redcap devices, including PRS configurations, DRX cycle alignment, and specialized assistance data, such as R-PosSIB, to enhance positioning accuracy and power savings while accounting for reduced capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If redcap devices use reduced bandwidth and fewer antennas to lower cost and complexity, then device cost and complexity are reduced, but positioning accuracy deteriorates
Solution Approach 1:
The patent applies local quality by configuring redcap UEs with specific positioning capabilities tailored to their reduced hardware capabilities. The network configures PRS measurements with parameters adapted to redcap device limitations (lower bandwidth, fewer antennas), allowing accurate positioning measurements to be performed within the constraints of reduced device complexity.
Solution Approach 2:
The patent changes key parameters of the positioning reference signal configuration to match redcap device capabilities. This includes adjusting bandwidth parameters, antenna port configurations, and measurement timing to align with the reduced capabilities of redcap devices while maintaining positioning accuracy.
2Measurement precision
If redcap devices perform continuous PRS measurements to maintain positioning accuracy, then positioning accuracy is maintained, but power consumption increases
Solution Approach 1:
The patent implements periodic action by configuring redcap UEs to perform PRS measurements at specific periodic intervals rather than continuously. The network configures measurement opportunities that align with redcap device DRX cycles, allowing the device to enter low-power states between measurements while maintaining acceptable positioning accuracy.
Solution Approach 2:
The patent applies preliminary action by pre-configuring redcap UEs with positioning capabilities and PRS measurement parameters during connection setup. This includes pre-configuring measurement gaps, DRX cycles, and reporting mechanisms so that devices can efficiently manage power consumption while maintaining positioning functionality.
3Device complexity
If redcap devices use reduced processing capability to lower device complexity, then device cost and complexity are reduced, but ability to process positioning signals deteriorates
Solution Approach 1:
The patent applies local quality by configuring redcap UEs with specific processing capabilities matched to their hardware limitations. The network provides assistance data and configures PRS parameters that reduce processing requirements while maintaining measurement accuracy, such as limiting the number of simultaneous measurements or simplifying signal processing algorithms.
Solution Approach 2:
The patent uses the network as an intermediary by providing assistance data and configured PRS parameters that simplify the processing burden on redcap devices. The network performs complex signal processing and provides processed positioning information to redcap UEs, compensating for their reduced local processing capability.
Data Source
AI summary
A reduced capability (redcap) user equipment (UE) is configured to receive a positioning reference signal (PRS) configuration from a network component and perform one or more positioning operations based at least in part on the PRS configuration. A base station is configured to receive, from a location management function (LMF) of a network, a positioning reference signal (PRS) configuration for a reduced capability user equipment (redcap UE) and transmit PRS to the redcap UE based on the PRS configuration.