Fujitsu Virtualized CU/DU (vCU/DU)

Fujitsu Virtualized CU/DU (vCU/DU)

In recent years, advances including performance improvements in general-purpose CPUs and the virtualization of wireless signal processing and control technology (telecom function) have opened an exciting wide range of new possibilities for technological innovation in communications, including the appearance of vCU/DU technology. The introduction of vCU/DU composed of general-purpose servers, which don’t require the costly development of specialized hardware, is currently drawing attention as an attractive alternative to conventional base stations.
Despite their promise, existing vCU/DU technology continues to face barriers to wider adoption. For instance, vCU/DU that are not configured with dedicated equipment tend to have lower performance efficiency than conventional base stations. To maintain the same performance, more hardware must be built in, resulting in higher environmental loads in areas like power consumption. In terms of stability and redundancy, there have also been cases in which conventional vCU/DU cannot sufficiently guarantee carrier-grade communication quality.


Fujitsu virtualized CU/DU supports 5G SA and conforms to O-RAN specifications, while leveraging the following proprietary technologies to successfully solve some of the challenges surrounding conventional vCU/DU. By optimizing the entire 5G wireless network and reducing the amount of equipment and power consumption, Fujitsu offers the potential to contribute to significant reductions in the total CO2 emissions throughout carriers’ 5G wireless systems by 50% or more compared to conventional RAN technology.

  • 1. Fujitsu’s unique technology to maintain high-performance and high-capacity - Fujitsu’s own innovation to improve software control methodology enables maintaining high performance and high capacity. It also increases communication speed and service coverage area from two to four times.
  • 2. Dynamic resource allocation technology - Reduce excess resources and power consumption by making it possible to flexibly adjust the computing resources of servers needed for operations according to the usage status (traffic volume) of base stations, which varies depending on service areas as well as time of day.
  • 3. Automatic cell re-design technology - In addition to using AI to predict future traffic fluctuations, this system leverages Fujitsu's quantum-inspired Digital Annealer computing technology to enable optimal allocation of computing resources by rapidly solving problems that are difficult to solve with today's general-purpose computers.
  • Read press release     Read white paper >


5G system energy and facility resource reduction

RU power consumption reduction technologies

System architecture and technology mapping


The technology for this product utilizes part of the results of the "Research and Development of Enhanced Infrastructures for Post-5G Information Communication Systems (c1) ": "Development of Technology to Enhance the Performance of a Virtualized Base Station Control Unit" of the New Energy and Industrial Technology Development Organization (NEDO).

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