Network Digital Twin for Open RAN: The Key Enablers, Standardization, and Use Cases

TL;DR

This paper discusses the concept of Network Digital Twin (NDT) for Open RAN, highlighting its key enablers, standardization efforts, and practical use cases like energy efficiency and traffic management, to enhance real-time network optimization.

Contribution

It introduces the concept of NDT in the context of O-RAN, detailing its key enablers, applications, and providing practical use cases for network optimization.

Findings

NDT enables risk-free testing and optimization of O-RAN configurations.

NDT supports real-time emulation, monitoring, and analysis for network resilience.

Practical use cases demonstrate NDT's effectiveness in energy efficiency and traffic steering.

Abstract

The open radio access network (O-RAN), with its disaggregated and open architecture, is poised to meet the demands of the next generation of wireless communication. However, to unlock the full potentials of O-RAN, real-time network modeling and optimization are essential. A promising solution for such requirement is the use of network digital twin (NDT). NDT provides a comprehensive view of a network, covering both physical and logical components, including infrastructure, protocols, and algorithms. NDT, as a real-time virtual representation of O-RAN facilitates a variety of operations, such as emulations, test, optimization, monitoring, and analysis of a new configuration in a risk-free environment, without requiring them to be implemented in real network. Such capability enables the vendors and network operators for a faster adoption of new solutions with frequent updates, while ensuring the resiliency of the existing services via planning ahead under various "what-if" scenarios. In this paper, we first describe what exactly NDT means in the context of O-RAN, as well as its key enablers. We then describe the NDT application within the O-RAN in both prior and post-deployment. Finally, we provide two practical uses cases, namely network energy efficiency and traffic steering, where the NDT can be leveraged effectively.