Downlink PRS Configuration Across Hyper SFN Muting Limits
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Solution Overview
Problem
Current DL PRS resource configurations in NR-based positioning systems can exceed the boundary of one hyper SFN, leading to impaired measurements and performance issues due to unperformable muting operations.
Innovation Solution
Implementing a threshold for the product of DL PRS resource periodicity and the number of consecutive instances, ensuring it does not exceed a first value, to support muting patterns beyond the SFN boundary, with specific configurations for subcarrier spacing and bitmap lengths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the product of PRS resource periodicity and the number of consecutive instances is configured to extend beyond one hyper SFN, then positioning coverage and measurement opportunities are improved, but muting operation cannot be performed and positioning performance deteriorates
Solution Approach 1:
The patent segments the PRS resource configuration by introducing a threshold value that divides the configuration space into two regions: configurations that fit within one hyper SFN (where muting can be applied) and those that extend beyond (where muting is restricted). This segmentation allows the system to apply muting operations selectively to valid configurations while accepting non-muting configurations for extended coverage scenarios, thus resolving the contradiction between duration extension and positioning performance.
2Measurement precision
If muting operation is applied to DL PRS resources, then interference management and positioning accuracy are improved, but configuration flexibility beyond one hyper SFN is reduced
Solution Approach 1:
The patent implements a dynamic configuration approach where the muting operation is conditionally applied based on the calculated product of periodicity and consecutive instances. When this product exceeds the threshold (one hyper SFN), muting is automatically disabled, allowing the system to adapt its operation mode (muting vs. non-muting) based on the specific configuration parameters. This dynamic behavior enables the system to maintain positioning accuracy through muting when feasible, while preserving configuration flexibility for extended scenarios when muting is not applicable.
Data Source
AI summary
Methods and systems for downlink (DL) positioning reference signal (PRS) configuration are provided. 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.