RF Environment Characterization Using Ray-Traced Path Selection
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Solution Overview
Problem
Current methods for creating a radio propagation digital twin are inefficient due to the need for human intervention and heuristic measurement location selection, which can lead to costly and resource-wasteful calibration processes.
Innovation Solution
A computer-implemented method for characterizing a radiofrequency environment by obtaining geometrical properties of physical objects, simulating radiofrequency ray-tracings, selecting paths with the most significant interactions, and performing radiofrequency measurements to estimate properties and generate a digital twin.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heuristic methods are used for measurement location selection, then human intervention is required which increases cost, but the method cannot guarantee sufficient measurements for calibration performance
Solution Approach 1:
The patent performs ray-tracing simulations in advance to pre-identify optimal measurement locations before actual measurements are taken. This preliminary action allows the system to select locations that will provide the most valuable calibration information, eliminating the need for heuristic human judgment and ensuring sufficient measurements for calibration performance.
Solution Approach 2:
The system uses automated algorithms to select measurement locations based on ray-tracing results, allowing the calibration process to be self-directed without human intervention. The computer automatically determines which locations provide the most informative measurements for calibrating the digital twin model.
2Measurement precision
If multiple transmitter-receiver pairs are used for measurements, then calibration accuracy improves, but the number of measurements increases causing resource waste
Solution Approach 1:
The patent uses ray-tracing simulations to identify only the essential measurement locations and paths that provide the most critical calibration information. Instead of performing exhaustive measurements across all possible transmitter-receiver pairs, the system selects a minimal subset of paths that are sufficient for accurate permittivity calibration, avoiding redundant measurements.
Solution Approach 2:
The system extracts and selects only the most informative measurement paths from the complete set of possible transmitter-receiver connections. By identifying paths where rays interact with physical objects in ways that provide maximum calibration value, the system removes unnecessary measurements while preserving calibration accuracy.
3Manufacturing precision
If exhaustive ray-tracing simulations are performed, then digital twin fidelity improves, but computational time and resources increase
Solution Approach 1:
The patent extracts and focuses computational resources on simulating only the critical ray paths that interact with physical objects affecting permittivity calibration. By identifying and selecting only these essential paths through automated analysis, the system reduces the total number of simulations required while maintaining digital twin fidelity.
Solution Approach 2:
Instead of performing complete exhaustive ray-tracing for all possible paths, the system performs partial simulations focused on the most informative paths identified through automated selection. This approach achieves sufficient digital twin fidelity with reduced computational effort by concentrating resources on critical paths rather than uniformly simulating all possibilities.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method minimizes the number of radiofrequency measurements required, saving time and resources while enabling accurate characterization and optimization of radio propagation environments.
Implementation Method 1
The radio channel between a transmitter and a receiver can be modelled as the propagation of electromagnetic rays in the environment
Implementation Method 2
rays encounter several objects where their path and their electromagnetic properties can change according to the nature of such objects, such as reflection, refraction, diffraction, etc.
Implementation Method 3
rays encounter several objects where their path and their electromagnetic properties can change according to the nature of such objects, such as reflection, refraction, diffraction, etc.
Implementation Method 4
rays encounter several objects where their path and their electromagnetic properties can change according to the nature of such objects, such as reflection, refraction, diffraction, etc.
Data Source
AI summary
A method for characterizing a radiofrequency environment, comprising: obtaining measurements of geometrical properties of physical objects in the environment, geometrical properties including at least respective positions and dimensions of objects, simulating radiofrequency ray-tracings involving a multiplicity of simulated rays, each ray being: emitted by a transmitter located in said environment in a transmitter position, and/or received by a receiver located in said environment in a receiver position,each pair of a transmitter and a receiver positions defining therebetween a radiofrequency path where rays possibly interact with at least a part of objects, selecting, among all the paths, at least one path defined by rays interacting with the objects which interact the most with rays,obtaining radiofrequency measurements of a radiofrequency channel defined by the selected path and estimating radiofrequency properties of objects interacting in selected path,radiofrequency properties and geometrical properties of objects characterizing thereby environment.