Positioning Reference Signal Hopping for RedCap UE Accuracy
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Solution Overview
Problem
The Reduced Capability User Equipment (RedCap UE) with reduced capabilities, its positioning accuracy is low due to the small bandwidth and limited amount of transmitted data, its positioning accuracy is low, and existing 5G NR technologies do not effectively address the positioning accuracy issues for terminal devices with limited bandwidth.
Innovation Solution
Implementing a hopping technique for positioning reference signals, including configuring uplink and downlink positioning reference signal hopping parameters to expand transmission bandwidth and increase the amount of transmitted data, thereby improving positioning accuracy for RedCap UE.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If RedCap UE uses standard 5G NR positioning reference signal configuration, then device complexity is reduced and ease of operation is improved, but positioning accuracy deteriorates due to limited bandwidth
Solution Approach 1:
The patent changes the frequency hopping parameters of the positioning reference signal to enable RedCap UE to transmit and measure signals across multiple frequency bands. By adjusting the hopping bandwidth and frequency offsets, the system achieves broader effective bandwidth utilization without requiring hardware changes, thereby improving positioning accuracy while maintaining compatibility with RedCap UE capabilities.
2Measurement precision
If RedCap UE transmits positioning reference signals in limited bandwidth, then energy consumption is reduced and device simplicity is maintained, but positioning accuracy deteriorates
Solution Approach 1:
The patent extends the positioning reference signal transmission from a single frequency band to multiple frequency bands by implementing frequency hopping. This dimensional expansion in the frequency domain allows the system to achieve broader bandwidth utilization and improved positioning accuracy without proportionally increasing energy consumption, as the hopping occurs over time rather than requiring simultaneous multi-band transmission.
3Measurement precision
If positioning reference signal bandwidth is expanded for RedCap UE, then positioning accuracy is improved, but device complexity and configuration overhead increase
Solution Approach 1:
The patent configures the positioning reference signal to serve multiple functions simultaneously: it maintains backward compatibility with existing 5G NR systems while enabling enhanced positioning accuracy for RedCap UE through frequency hopping. The same positioning reference signal configuration achieves both legacy device support and improved performance for bandwidth-limited devices, reducing the need for separate configuration schemes.
Data Source
AI summary
A method for configuring a positioning reference signal is performed by an access network device, and includes: sending configuration information for a hopping parameter of the positioning reference signal.