O-RAN Abbreviations/Acronyms

Live list of abbreviations & Acronyms from O-RAN Specification

Sunku R
2 min readDec 5, 2021

O-RAN specifications are fast gaining prominence as Mobile Network Operators (MNOs) across the world are implementing the specifications.

Photo by Sangga Rima Roman Selia on Unsplash

However there are lot of abbreviations & acronyms that comes along with the specifications. This is my attempt to help list out the relevant ones that might help you in your journey with O-RAN.

Note: Easiest way to find a specific abbreviation is to use Ctrl+f from your browser.

Find any missing ones here? Feel free to comment so I can add them here.

RAN — Radio Access Network

UE: User Element

UE-NIB: User Element — Network Information Base

RNIB — Radio Network Information Base

RIC — RAN Intelligent Controller

RU — Radio Unit

DU — Distributed Unit

CU — Centralized Unit

CU-UP — Centralized Unit-User Plane

CU-CP — Centralized Unit-Control Plane

R-NIB — Radio Network Info Base

RMR — RIC Message Router

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