Open Access

REVIEW

An Investigation on Open-RAN Specifications: Use Cases, Security Threats, Requirements, Discussions

Heejae Park¹, Tri-Hai Nguyen², Laihyuk Park^1,*

1 Department of Computer Science and Engineering, Seoul National University of Science and Technology, Seoul, 01811, Republic of Korea
2 Faculty of Information Technology, School of Technology, Van Lang University, Ho Chi Minh City, 70000, Vietnam

* Corresponding Author: Laihyuk Park. Email:

(This article belongs to the Special Issue: Advanced Security for Future Mobile Internet: A Key Challenge for the Digital Transformation)

Computer Modeling in Engineering & Sciences 2024, 141(1), 13-41. https://doi.org/10.32604/cmes.2024.052394

Received 31 March 2024; Accepted 31 May 2024; Issue published 20 August 2024

Abstract

The emergence of various technologies such as terahertz communications, Reconfigurable Intelligent Surfaces (RIS), and AI-powered communication services will burden network operators with rising infrastructure costs. Recently, the Open Radio Access Network (O-RAN) has been introduced as a solution for growing financial and operational burdens in Beyond 5G (B5G) and 6G networks. O-RAN promotes openness and intelligence to overcome the limitations of traditional RANs. By disaggregating conventional Base Band Units (BBUs) into O-RAN Distributed Units (O-DU) and O-RAN Centralized Units (O-CU), O-RAN offers greater flexibility for upgrades and network automation. However, this openness introduces new security challenges compared to traditional RANs. Many existing studies overlook these security requirements of the O-RAN networks. To gain deeper insights into the O-RAN system and security, this paper first provides an overview of the general O-RAN architecture and its diverse use cases relevant to B5G and 6G applications. We then delve into specifications of O-RAN security threats and requirements, aiming to mitigate security vulnerabilities effectively. By providing a comprehensive understanding of O-RAN architecture, use cases, and security considerations, this work serves as a valuable resource for future research in O-RAN and its security.

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Keywords

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