Open RAN is the industry’s generic term for an open radio access network architecture. An Open RAN has open interoperable interfaces, RAN virtualization, and support for big data and AI-enabled RAN.
Providers deploying an Open RAN can choose between a 3GPP or O-RAN architecture.
It refers to the virtualization of RAN functions, particularly the higher layer and lower layer function of the baseband unit.
3GPP Release 15 CU-DU split architecture facilitated this journey to begin by separating the centralized and distributed functions of RAN. With vRAN, 5G becomes software-defined and programmable, generating additional RAN architecture flexibility, platform harmonization, and operational simplification.
It refers to the Open RAN standardized by the O-RAN Alliance.
The O-RAN Alliance has four main objectives: Open Interfaces, Virtualization, Intelligence, and Interoperability.
O-RAN enables service providers to deploy radio units (RU) and distributed units (DU) from different vendors with a new Lower Layer Split (LLS) split, called Option 7-2x, transported over eCPRI protocol.