In January, Google’s parent company, Alphabet, shut down Project Loon, an initiative exploring using stratospheric helium balloons to distribute wireless internet (an attempt to use solar-powered drones folded in 2017). However, some technology developed as a part of the Loon project remained in development, specifically the Free Space Optical Communications (FSOC) links that were originally meant to connect the high flying balloons — and now that technology is actively in use providing a high-speed broadband link for people in Africa.
Sort of like fiber optic cables without the cable, FSOC can create a 20Gbps+ broadband link from two points that have a clear line of sight, and Alphabet’s moonshot lab X has built up Project Taara to give it a shot. They started by setting up links in India a few years ago as well as a few pilots in Kenya, and today X revealed what it has achieved by using its wireless optical link to connect service across the Congo River from Brazzaville in the Republic of Congo and Kinshasa in the Democratic Republic of Congo.
In 20 days, Project Taara lead Baris Erkmen says the link transmitted nearly 700TB of data, augmenting fiber connections used by local telecom partner Econet and its subsidiaries. The reason for testing the technology in this location is not only the climate, which the team admits is better suited to wireless optical communications than a foggy city like San Francisco but the obstacle created by the deep and fast-flowing river. The cities are only a few miles apart as the crow flies, but Taara says a fiber link to Kinshasa has to run nearly 250 miles (400 kilometers), making it five times as expensive to get online.