Nokia is putting the first cellular network on the moon

Point-to-point radio communications, which need a clear line of sight between transmitting and receiving antennas, have always been a backbone of both surface communications and the link back to Earth, starting with the Apollo program. Using point-to-point radio in space wasn’t much of an issue in the past because there never have been that many points to connect. Usually, it was just a single spacecraft, a lander, or a rover talking to Earth. And they didn’t need to send much data either.

“They were based on [ultra high frequency] or [very high frequency] technologies connecting a small number of devices with relatively low data throughput”, says Thierry Klein, president of Nokia Bell Labs Solutions Research, which was contracted by NASA to design a cellular network for the moon back in 2020. 

But it could soon get way more crowded up there: NASA’s Artemis program calls for bringing the astronauts back to the moon as early as 2028 and further expanding that presence into a permanent habitat in 2030s. 

The shift from mostly point-to-point radio communications to a full-blown cell network architecture should result in higher data transfer speeds, better range, and increase the number of devices that could be connected simultaneously, Klein says. But the harsh conditions of space travel and on the lunar surface  make it difficult to use Earth-based cell technology straight off the shelf. 

Instead, Nokia designed components that are robust against radiation, extreme temperatures, and the sorts of vibrations that will be experienced during the launch, flight, and landing. They put all these components in a single “network in a box”, which contains everything needed for a cell network except the antenna and a power source.

“We have the antenna on the lander, so together with the box that’s essentially your base station and your tower”, Klein says. The box will be powered by the lander’s solar panels.

During the IM-2 mission, the 4G cell network will allow for communication between the lander and the two vehicles. The network will likely only work for a few days— the spacecraft are not likely to survive after night descends on the lunar surface.