NR Positioning Reference Signal Configuration via QCL References
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Solution Overview
Problem
In the new radio (NR) system, there is a lack of clear guidance on how to configure a positioning reference signal (PRS) for user equipment (UE), resulting in UE's inability to obtain PRS.
Innovation Solution
A method for configuring and receiving a positioning reference signal (PRS) in the NR system, involving the transmission of first target configuration information by a network device to a terminal device, which includes selecting cells within a predetermined distance, generating PRS based on specific parameters, and providing synchronization signal block (SSB) and channel state information reference signal (CSI-RS) with quasi co-location (QCL) relationship to assist in positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the NR system adopts new radio access technology, then communication performance and positioning capability are improved, but the lack of PRS configuration guidance causes UE to be unable to obtain positioning reference signals
Solution Approach 1:
The patent introduces SSB and CSI-RS as intermediary reference signals that have a quasi co-location relationship with PRS. These intermediary signals carry QCL information that enables UE to indirectly obtain positioning reference signal characteristics, solving the problem of missing direct PRS configuration guidance in NR systems.
Solution Approach 2:
The patent makes existing reference signals (SSB and CSI-RS) serve dual purposes: their traditional functions for synchronization and channel state information, plus an additional positioning function through QCL relationship configuration. This allows the same signal structure to provide both communication and positioning capabilities without requiring entirely new signal designs.
2Adaptability or versatility
If PRS is transmitted in NR system without clear configuration guidelines, then system flexibility is maintained, but UE cannot acquire positioning reference signals for accurate positioning
Solution Approach 1:
The patent changes the configuration parameters by introducing QCL relationship indicators that link PRS with SSB and CSI-RS. Instead of providing direct PRS configuration parameters, the system uses parameter relationships (QCL associations) to implicitly define PRS characteristics, maintaining flexibility while enabling precise positioning measurements.
3Device complexity
If the system uses existing reference signals for positioning, then device complexity is reduced, but clear PRS configuration guidance is still needed for accurate positioning
Solution Approach 1:
The patent enables existing reference signals (SSB and CSI-RS) to self-serve the positioning function through their inherent QCL relationships with PRS. The same signal structures that provide synchronization and channel information automatically provide positioning reference information through their quasi co-location properties, eliminating the need for separate positioning signal configurations.
Data Source
AI summary
A method for configuring a positioning reference signal in an NR system, a method for receiving a positioning reference signal in an NR system, and a device. The configuration method includes: transmitting first target configuration information, where the first target configuration information is used to configure a positioning reference signal PRS of a terminal device.