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arXiv · 2401.03812

ORANUS: Latency-tailored Orchestration via Stochastic Network Calculus in 6G O-RAN

Oscar Adamuz-Hinojosa·Lanfranco Zanzi·Vincenzo Sciancalepore·Andres Garcia-Saavedra·Xavier Costa-Pérez
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Abstract

The Open Radio Access Network (O-RAN)-compliant solutions lack crucial details to perform effective control loops at multiple time scales. In this vein, we propose ORANUS, an O-RAN-compliant mathematical framework to allocate radio resources to multiple ultra Reliable Low Latency Communication (uRLLC) services. In the near-RT control loop, ORANUS relies on a novel Stochastic Network Calculus (SNC)-based model to compute the amount of guaranteed radio resources for each uRLLC service. Unlike traditional approaches as queueing theory, the SNC-based model allows ORANUS to ensure the probability the packet transmission delay exceeds a budget, i.e., the violation probability, is below a target tolerance. ORANUS also utilizes a RT control loop to monitor service transmission queues, dynamically adjusting the guaranteed radio resources based on detected traffic anomalies. To the best of our knowledge, ORANUS is the first O-RAN-compliant solution which benefits from SNC to carry out near-RT and RT control loops. Simulation results show that ORANUS significantly improves over reference solutions, with an average violation probability 10x lower.

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Oscar Adamuz-Hinojosa, Lanfranco Zanzi, Vincenzo Sciancalepore, Andres Garcia-Saavedra, Xavier Costa-Pérez. 2024-01-08. ORANUS: Latency-tailored Orchestration via Stochastic Network Calculus in 6G O-RAN. https://arxiv.org/abs/2401.03812

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