Digital Twin RF Mapping for Efficient Wireless Environment Sensing

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Solution Overview

Problem

Existing wireless communication systems, particularly in the context of 5G, face challenges in accurately characterizing and optimizing radio frequency (RF) environments for improved sensing and positioning, as they rely heavily on physical measurements which can be limited in scope and efficiency.

Innovation Solution

The implementation of digital twins (DT) entities that facilitate RF map requests and responses between sensing entities, enabling enhanced RF sensing functionalities by leveraging digital models to complement or replace physical measurements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If physical measurements are used to characterize RF environments, then measurement accuracy is achieved, but measurement scope and efficiency are limited

Engineering Contradiction:

ImproveRF environment characterization accuracyVSAvoidRF sensing efficiency

Core Design Contradiction:

Measurement precisionVSProductivity

Solution Approach 1:

The patent creates a digital twin that is a virtual copy of the physical RF environment. This digital replica allows comprehensive RF characterization through simulation rather than limited physical measurements, enabling both high accuracy and extensive measurement scope simultaneously.

Inventive Principle:

Principle #26Copying

Solution Approach 2:

The patent replaces physical measurement systems with a digital simulation system. Instead of using physical sensors and measurement equipment to characterize RF environments, the system uses digital models to simulate and characterize the same environments, thereby eliminating the limitations of physical measurement scope and efficiency.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Adaptability or versatility

If digital twins are used to model RF environments, then sensing comprehensiveness is improved, but system complexity increases

Engineering Contradiction:

ImproveRF sensing comprehensivenessVSAvoiddigital twin system complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The digital twin system is designed to serve multiple functions: it models RF environments, characterizes channel properties, supports positioning, and enables sensing applications. By making the system multi-functional, the patent justifies the increased complexity through the gain in comprehensive sensing capability across multiple domains.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent embeds multiple levels of detail within the digital twin structure, from macro environmental modeling to micro channel characterization. This nested approach allows the system to manage complexity hierarchically, where simpler models can be used for broad applications and more detailed models are activated only when needed for specific sensing tasks.

Inventive Principle:

Principle #7Nested doll (Nesting)

Data Source

PatentUS20250298118A1Radio frequency (RF) sensing procedures with digital twins

Publication Date: 2025.09.25 QUALCOMM INC

AI summary

In an aspect, a digital twin (DT) entity may transmit, to a sensing entity, a request for an RF map, wherein the RF map is a characterization of a wireless environment determined based on one or more sensing sessions. The DT entity may receive, from the sensing entity, the RF map. In an aspect, a sensing entity may transmit, to a DT entity, a request to provide channel characteristics for one or more wireless links within a wireless environment modeled by a digital twin at the DT entity. The sensing entity may receive, from the DT entity, the channel characteristics.