O-RAN-Enabled Adaptive Relaying for Robust V2X Communication in Urban NLOS Scenarios
The Open Radio Access Network (O-RAN) introduces programmability and intelligence into wireless infrastructure, making it a promising enabler of reliable Vehicle-to-Everything (V2X) communication in complex urban environments. Unlike traditional RAN, O-RAN's disaggregated architecture and RAN I...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Centre Tecnològic de Telecomunicacions de Catalunya (CTTC) |
| Repositorio: | r-CTTC. Repositorio Institucional Producción Científica del Centre Tecnològic de Telecomunicacions de Catalunya (CTTC) |
| OAI Identifier: | oai:cttc.fundanetsuite.com:p8862 |
| Acceso en línea: | https://cttc.fundanetsuite.com/Publicaciones/ProdCientif/PublicacionFrw.aspx?id=8862 |
| Access Level: | acceso abierto |
| Palabra clave: | Open RAN Relays Sidelink Vehicle-to-everything Vehicle dynamics Fading channels Real-time systems 3GPP Signal to noise ratio Adaptation models O-RAN NR-V2X sidelink communication RAN Intelligent Controller (RIC) NLOS adaptive relaying fallback mechanism packet success probability (PSP) 3GPP Release 18 |
| Sumario: | The Open Radio Access Network (O-RAN) introduces programmability and intelligence into wireless infrastructure, making it a promising enabler of reliable Vehicle-to-Everything (V2X) communication in complex urban environments. Unlike traditional RAN, O-RAN's disaggregated architecture and RAN Intelligent Controller (RIC) allow real-time adaptation to Non-Line-of-Sight (NLOS) challenges, an issue unresolved in many existing V2X systems. This paper proposes an adaptive relaying framework that leverages the near-real-time RIC to dynamically enhance V2X reliability through dynamic relay selection and interference-aware resource coordination. The architecture supports programmable fallback relaying using disaggregated Distributed Unit (O-DU)/Radio Unit (O-RU) at roadside infrastructure, enabling low-latency two-hop paths when direct sidelink communication fails. To evaluate performance, a semi-analytical model based on Moment Matching Approximation (MMA) is developed, capturing the signal-to-interference-plus-noise ratio (SINR) under composite Nakagami-lognormal fading and stochastic co-channel interference. The framework integrates O-RAN with NR-V2X sidelink communication to bridge the gap between centralized and ad-hoc vehicular networks. Simulation results demonstrate that the proposed O-RAN-aided relaying improves Packet Success Probability (PSP) in dense NLOS scenarios, consistently achieving a PSP above 90%. The framework outperforms conventional LOS and NLOS approaches while maintaining compatibility with 3GPP Release 18 and O-RAN Alliance specifications, ensuring practical deployability in future intelligent transportation systems (ITS). |
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