DARPA has built the world’s largest testbed for doing repeatable radio experiments. The testbed is called Colosseum. It’s like a holodeck for radios. Experimenters can connect up to 256 radios which transmit, receive and interfere with each other just as they would in the real world. Except their movements and the world around them are totally controlled by the test script.

Researchers can log into Colosseum from anywhere on the Internet to conduct their experiments. Colosseum is currently located at a facility in Maryland.  In October 2019 Colosseum will move to the show floor of Mobile World Congress – Los Angeles. There it will be on public display during the live final competition of SC2.

Colosseum is so big, its input and output data streams are also massive. DARPA had to build new tools to automate input generation and to make the output data understandable.