Multi-Bandwidth PRS Measurement for RedCap Positioning
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently performing wireless signal transmission and reception procedures, particularly for reduced capability user equipment (RedCap-UEs), due to limitations in bandwidth and time resource allocation for positioning reference signals, which affect positioning accuracy.
Innovation Solution
The proposed method involves configuring multiple bandwidths for positioning frequency layers, allowing RedCap-UEs to measure and report positioning reference signals (PRS) across non-overlapping time resources, with the first PRS muted on the second time resource, and utilizing different PRS resource sets, to enhance positioning accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple bandwidths are configured for positioning frequency layers, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The positioning frequency layer is segmented into multiple bandwidth configurations (first bandwidth and second bandwidth), allowing the system to measure positioning reference signals at different bandwidth levels. This segmentation enables the UE to achieve higher positioning accuracy by utilizing multiple bandwidths while managing device complexity through structured configuration management.
Solution Approach 2:
The system dynamically switches between different bandwidth configurations based on measurement requirements. The UE can adaptively select and measure positioning reference signals using different bandwidths at different time resources, allowing flexibility in balancing positioning accuracy and device complexity according to actual network conditions.
2Measurement precision
If PRS measurements are performed on multiple bandwidths, then positioning accuracy is improved, but time resources increase
Solution Approach 1:
The system employs periodic measurement actions where the UE measures positioning reference signals on different bandwidths at different time resources in a structured periodic manner. The first PRS is measured on the first bandwidth at a first time resource, and the second PRS is measured on the second bandwidth at a second time resource, allowing efficient time resource utilization while achieving improved positioning accuracy.
Solution Approach 2:
The system performs partial measurements by selecting specific time resources for measuring PRS on different bandwidths. Rather than continuously measuring all bandwidths, the UE performs measurements on non-overlapping time resources, reducing the total time required while still achieving the positioning accuracy benefits of multi-bandwidth measurement.
3Productivity
If first PRS is muted on second time resource, then measurement efficiency is improved, but signal coverage is reduced
Solution Approach 1:
The system extracts and removes the first PRS from the second time resource (muting it), allowing the second PRS to be measured without interference on that time resource. This extraction improves measurement efficiency by eliminating signal conflicts, while the first PRS remains available on the first time resource to maintain signal coverage.
Solution Approach 2:
The system resolves the signal coverage issue by transitioning to another dimension - using different time resources for different bandwidth measurements. The first PRS is measured on the first time resource while the second PRS is measured on the second time resource, allowing both signals to coexist without interference while maintaining comprehensive coverage across different time-frequency dimensions.
Data Source
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AI summary
A method of performing measurement for positioning by a terminal in a wireless communication system according to at least one of embodiments disclosed in the present specification may comprise: receiving configuration information on one or more positioning frequency layers (PFLs) from a network; measuring positioning reference signals (PRSs) on the basis of one PFL among the one or more PFLs; and transmitting a measurement report on the basis of the measurement of the PRSs, wherein the one PFL includes respective configurations on a first PRS having a first bandwidth and a second PRS having a second bandwidth with a size different from that of the first bandwidth, and the measurement report includes both a result of measuring the first PRS on a first time resource and a result of measuring the second PRS on a second time resource.