Digital Twin For RIS-Aided Systems

Overview

Beyond 5G networks are expected to deliver ultra-reliable, low-latency, and high-capacity connectivity. One of the key enabling technologies for achieving these goals is a reconfigurable intelligent surface (RIS), which is a programmable metasurface composed of many passive elements, each capable of adjusting the phase of incident signals. By intelligently controlling these elements, RIS can manipulate wireless propagation environment to enhance coverage, increase capacity, and improve energy efficiency. To accurately model the behavior of RIS within complex and dynamic environments, digital twins are used to capture realistic performance of RIS-aided systems. This work introduces digital twin framework for three RIS-aided systems in indoor environments: single RIS-aided, cascaded RISs-aided, and RIS partitioning. The proposed digital twin model is validated through experimental measurements and theoretical calculations, with performance evaluated in terms of the received signal strength indicator (RSSI).

Introduction

Beyond 5G networks are expected to deliver ultra-reliable, low-latency, and high-capacity connectivity. One of the key enabling technologies for achieving these goals is a reconfigurable intelligent surface (RIS), which is a programmable metasurface composed of many passive elements, each capable of adjusting the phase of incident signals. By intelligently controlling these elements, RIS can manipulate wireless propagation environment to enhance coverage, increase capacity, and improve energy efficiency. To accurately model the behavior of RIS within complex and dynamic environments, digital twins are used to capture realistic performance of RIS-aided systems. This work introduces digital twin framework for three RIS-aided systems in indoor environments: single RIS-aided, cascaded RISs-aided, and RIS partitioning. The proposed digital twin model is validated through experimental measurements and theoretical calculations, with performance evaluated in terms of the received signal strength indicator (RSSI).

System Model

ccsl-use-cases-digital-twin-in-ris-aided-systems
Use cases for Digital Twins in RIS-aided systems: (a) Single RIS-aided system, (b) Cascaded RISs-aided system, and (c) RIS partitioning system.

Proposed Technique

ccsl-experimental-setup-digital-twin-ris
Experimental setup and digital twin representation of RIS-aided systems: horn antenna, RIS, signal generator, and signal analyzer are used in experimental procedures for single RIS, cascaded RISs, and RIS partitioning systems. Their corresponding digital twin models in Sionna and a 3D indoor environment are also illustrated.

Results

validation-digital-twin-ris-results
Validation of digital twin models for RIS-aided systems: experimental, theoretical, and ray tracing results are compared for single RIS, cascaded RISs, and RIS partitioning systems. The results confirm that ray tracing deviates by less than 1–2 dB from measurements and theory, demonstrating high model accuracy.

How to download/use the Dataset

  • You can use the Python code for Sionna Digital Twin model from the following link: Coming Soon
  • You can use the MATLAB code for theoretical calculations from the following link: Coming Soon
  • How to use the Python and MATLAB codes: Coming Soon

Copyright

The data and results presented in this work are protected by copyright and may only be used with proper citation. Any use of this work should reference the following papers: