PRS Frequency Layer Aggregation for Higher-Precision Positioning
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Solution Overview
Problem
Current positioning technologies in low-frequency communication systems suffer from low precision due to limited bandwidth of single PRS, making it difficult to achieve high accuracy positioning.
Innovation Solution
Implement PRS frequency layer aggregation by configuring terminal devices to perform aggregated measurements on associated PRS resources across multiple frequency layers, increasing effective measurement bandwidth without significant modification to existing PRS configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If single PRS bandwidth is limited to 100 MHz in low-frequency communication system, then existing PRS configuration can be maintained, but positioning precision is insufficient
Solution Approach 1:
The patent combines multiple PRS resources from different frequency layers into an aggregated measurement set. The terminal device measures PRS resources across at least two different frequency layers (e.g., first frequency layer and second frequency layer) and aggregates the measurement results to obtain a combined measurement result. This merging approach effectively increases the measurement bandwidth beyond the single 100 MHz limit while maintaining compatibility with existing PRS configurations.
Solution Approach 2:
The patent introduces a new dimension of frequency layer aggregation to the traditional single-frequency PRS measurement approach. By measuring PRS resources across multiple frequency layers simultaneously and aggregating the results, the system achieves enhanced positioning precision without fundamentally changing the PRS configuration structure. This dimensional extension allows the terminal device to utilize additional frequency resources for measurement purposes.
2Measurement precision
If PRS bandwidth is increased to improve positioning precision, then measurement precision improves, but PRS configuration modification is required
Solution Approach 1:
The patent makes the existing PRS configuration universal by enabling it to serve both single-frequency and multi-frequency layer measurement purposes. The aggregated measurement set can include PRS resources from one or multiple frequency layers, allowing the same configuration framework to accommodate different measurement scenarios. This universality eliminates the need for separate configuration systems for enhanced bandwidth measurements.
Solution Approach 2:
The patent changes the parameter of frequency layer diversity within the existing PRS configuration framework. Instead of modifying the fundamental PRS structure, the system varies the frequency layer parameter to include multiple layers in the aggregated measurement set. This parameter change enables increased measurement bandwidth while maintaining compatibility with existing configuration protocols and terminal device capabilities.
3Quantity of substance
If multiple frequency layers are aggregated for measurement, then signal bandwidth increases, but measurement processing complexity increases
Solution Approach 1:
The patent performs preliminary actions by pre-configuring the terminal device with assistance data that includes information about PRS resources across multiple frequency layers. The terminal device is pre-provided with configuration information indicating which PRS resources should be aggregated, allowing the device to automatically identify and measure the appropriate resources without complex real-time processing decisions. This preliminary configuration reduces measurement processing complexity.
Solution Approach 2:
The patent implements feedback mechanisms where the terminal device reports measurement results for the aggregated PRS resources back to the network. The network uses these feedback results to determine positioning information and can provide further configuration adjustments. This feedback loop enables the system to manage measurement processing complexity through iterative optimization and adaptive configuration based on actual measurement conditions.
Data Source
AI summary
Embodiments of this application provide a method for performing aggregated measurement on a positioning reference signal PRS and an apparatus. The method includes: A terminal device receives configuration information sent by a location management device, determines PRS resources having an association relationship in each PRS frequency layer combination based on information about at least one PRS frequency layer combination, performs aggregated measurement on the PRS resources having the association relationship to obtain a measurement result, and reports the measurement result to the location management device, where each PRS frequency layer combination includes at least two PRS frequency layers participating in aggregation. According to the foregoing solution, positioning accuracy of the terminal device can be improved.