NTT DOCOMO, OREX
August 31, 2025

This white paper shares NTT DOCOMO’s extensive experience in deploying a nationwide, multi-vendor Open and Intelligent RAN in Japan.
It highlights motivations, business drivers, phased deployment strategies, key success factors, and lessons learned—ranging from interoperability testing to system integration frameworks like OREX.
The insights provide practical guidance for operators worldwide, offering a deep dive into the organizational, technical, and ecosystem aspects essential for successful Open RAN adoption.
Download White Paper
Lorem ipsum dolor sit amet, consectetuer adipiscing elit
The content of the documents in this section of the O-RAN ALLIANCE website is provided by the authors of each document. Copying or incorporation into any other work, in part or in full of the documents in any form without the prior written permission of the authors is prohibited, with the exception that you may:
Print or download extracts of the documents for your personal use; or
Copy the documents or parts of the documents for the purpose of sending to individual third parties for their information provided that you acknowledge the authors as the source of the material and that you inform the third party that these conditions apply to them and that they must comply with them.
The O-RAN ALLIANCE name and logo are registered as international trademarks in all regions of the world. To maintain the value of the trademark O-RAN’s name shall always be spelled in capitals: O-RAN ALLIANCE. For brevity the O-RAN ALLIANCE may sometimes be shortened to O-RAN.