5/30/2025 (FRI) 15:20 ～ 15:40B3-3WJWTPSeminar Venue B
Building and Demonstrating a 5G Digital Twin Platform – Real-Time Wireless Emulation Based on OpenAirInterface –
The development of advanced wireless communication systems generally progresses through stages such as research, development, and verification. In particular, evaluating the performance of newly developed systems through verification experiments based on real-world usage scenarios is extremely important. However, conducting such verification experiments often faces several challenges, including obtaining licenses, the high cost of testing with physical devices, and managing interference with existing systems.
To overcome these challenges, digital twin technology — which utilizes emulation techniques to recreate the complex radio propagation characteristics of the real world in a high-fidelity and real-time virtual environment — is gaining attention in the wireless communication field.
There are two main approaches to modeling radio propagation characteristics: stochastic methods and deterministic methods. Of these, ray-tracing — a deterministic method — is notable for its ability to reproduce detailed multipath propagation by leveraging 3D building models and terrain data. Moreover, in high-frequency bands such as millimeter-wave and sub-terahertz, which are expected to play a key role in Beyond 5G and 6G, radio propagation is highly environment-dependent, making site-specific propagation models increasingly valuable.
In this context, the presenters have developed a platform that extends the open-source 5G base station “OAIBOX,” built on OpenAirInterface (OAI), with channel emulation capabilities. This platform enables real-time superimposition of multipath propagation characteristics onto radio signals, allowing for end-to-end evaluation of 5G communication from the core network to user equipment (UE) under specific channel environments. Additionally, since the platform is based on open-source software, it offers the flexibility to modify the radio access network protocols and core network functionalities, making it possible to perform comparative evaluations under identical channel conditions.
In this presentation, we will introduce the architecture of this platform and share examples of 5G wireless communication emulation conducted using this environment, along with the corresponding evaluation results.
KOZO KEIKAKU ENGINEERING Inc.
Shohei Takaya
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