Downlink PRS Configuration Within Single-SFN Muting Limits
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Solution Overview
Problem
Current DL PRS resource configurations in NR-based positioning systems can exceed one hyper system frame number (SFN), leading to impaired measurement performance due to unperformable muting operations, which negatively impact positioning accuracy.
Innovation Solution
Implementing a threshold for the product of DL PRS resource set periodicity and consecutive instances to ensure muting patterns are within a single SFN boundary, using parameters such as subcarrier spacing and bitmap lengths to manage PRS resource configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If downlink positioning reference signals are configured for each serving cell in a multi-cell scenario, then positioning accuracy is improved, but network signaling overhead and device power consumption increase
Solution Approach 1:
The patent segments the positioning reference signal configuration by introducing a first set of downlink positioning reference signals for a first serving cell and a second set for a second serving cell. Each set is independently configurable with distinct parameters including time domain resources, frequency domain resources, and signal patterns. This segmentation allows the network to selectively activate positioning signals only for specific cells where positioning is required, rather than configuring all cells uniformly, thereby reducing overall signaling overhead while maintaining positioning accuracy for target cells.
2Measurement precision
If downlink positioning reference signals are configured for each serving cell in a multi-cell scenario, then positioning accuracy is improved, but device power consumption increases
Solution Approach 1:
The patent segments the positioning reference signal configuration by introducing a first set of downlink positioning reference signals for a first serving cell and a second set for a second serving cell. Each set is independently configurable with distinct parameters including time domain resources, frequency domain resources, and signal patterns. This segmentation allows the network to selectively activate positioning signals only for specific cells where positioning is required, rather than configuring all cells uniformly, thereby reducing overall signaling overhead while maintaining positioning accuracy for target cells.
3Ease of manufacture
If positioning reference signals use fixed time and frequency resources, then signal transmission is simplified, but flexibility in adapting to different network conditions is reduced
Solution Approach 1:
The patent implements dynamic positioning reference signal configuration by allowing network devices to flexibly allocate time domain resources (such as slots, symbols, and subframes) and frequency domain resources (such as resource blocks and subcarriers) based on current network conditions, traffic patterns, and positioning requirements. The configuration parameters including signal patterns, resource allocation, and transmission power can be dynamically adjusted through RRC signaling, enabling the system to adapt to varying network scenarios while maintaining manageable complexity through standardized configuration procedures.
Data Source
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AI summary
Methods and systems for downlink (DL) positioning reference signal (PRS) configuration. The method includes receiving, at a terminal device, information for configuring one or more DL PRS resource sets and configurating the terminal device according to the received information for configuring the one or more DL PRS resource sets. Each of the DL PRS resource set includes one or more DL PRS resources, and corresponds to a spatial transmission filter. The spatial transmission filter corresponds to a first value.