Fujitsu and Rakuten Mobile Partner in 5G Network Expansion

Rakuten Mobile, a Japanese mobile network operator, announced it will begin deploying base stations utilizing radio units (RU) developed by Fujitsu Limited, as it accelerates the expansion of its 5G (Sub6) network area in 2025.

Leveraging its expertise in building a fully virtualized, cloud-native mobile network based on Open RAN standards in Japan, Rakuten Mobile will continue to deploy 5G Sub6 base stations and expand its coverage area. Fujitsu, through its compact and energy-efficient RU, will support Rakuten Mobile's rollout of 5G commercial services and contribute to the further global adoption of Open RAN.

The RU model to be used by Rakuten Mobile, 44R21, adopts the O-RAN specifications established by the O-RAN ALLIANCE—a worldwide community promoting the development of Open RAN specifications. The RU facilitates communication between the base station's distributed unit (DU) and centralized unit (CU) via a fronthaul interface. Additionally, using Fujitsu's proprietary technology, the radio units are designed to be compact, lightweight and energy-efficient, thereby contributing to leaner space requirements and lower network operation costs.

Going forward, Rakuten Mobile will use its virtualization network technology and existing base station infrastructure to reduce lead times from construction to operation, ensuring cost-efficient deployments of base stations. Additionally, Rakuten Symphony will work together with Fujitsu to discuss future collaborations, aiming to drive the global rollout of these units and accelerate the worldwide adoption of Open RAN technology.

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