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The DoD and the National Telecommunications and Information Administration’s Institute for Telecommunication Sciences (NTIA/ITS) announced the winning contestants in the 5G Challenge’s Preliminary Event: RAN Subsystem Interoperability on May 19, 2022.

The following applicants will advance to Stage Two interoperability testing with the 5G Challenge host lab, CableLabs:

Distributed Unit (DU)

  • Radisys Corp.
  • Signal System Management

Centralized Unit (CU)

  • Capgemini Engineering
  • Mavenir Systems, Inc.
  • Signal System Management

Radio Unit (RU)

  • Fujitsu Network Communications
  • Mavenir Systems, Inc.

The DoD, in collaboration with NTIA/ITS, is hosting the 5G Challenge, a multi-stage prize competition that seeks to accelerate the adoption of 5G open interfaces, interoperable subsystems, and multi-vendor solutions towards the development of an open 5G ecosystem. 

The Preliminary Event: RAN Subsystem Interoperability is the first of two 5G Challenge contests.  For the 2022 5G Challenge Preliminary Event, NTIA/ITS will award part of the total $3 million prize purse to contestants who submit winning hardware and/or software solutions for one or more of these 5G network subsystems: Distributed Unit (DU); Centralized Unit (CU); Radio Unit (RU). 

The 5G Challenge Preliminary Event: RAN Subsystem Interoperability is now closed to entries, but you can continue to follow the event on The rules, location, and details of the second-year event will be released in 2023.

About USD(R&E) 

The Under Secretary of Defense for Research and Engineering (USD(R&E) is the Chief Technology Officer of the Department of Defense. The USD(R&E) champions research, science, technology, engineering, and innovation to maintain the United States military’s technological advantage. Learn more at, follow us on Twitter @DoDCTO, or visit us on LinkedIn at

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