Home Broadband Is 5G's Surprise Killer App

When 5G launched in 2019, industry hype centered on mobile augmented reality and autonomous vehicles. However, the unexpected twist is that replacing home cable internet has become 5G's most widely adopted new application. Fixed wireless access (FWA) now serves over 14 million U.S. customers and accounts for 28 percent of global wireless traffic. FWA delivers broadband internet over a cellular radio link to a stationary location, eliminating the need for cable, fiber, or satellite dishes.

FWA repurposes the same towers, spectrum, and 5G infrastructure built for mobile devices. Carriers discovered they could use surplus 5G capacity, especially since mobile traffic drops after 8 p.m., just when home internet usage peaks. This allows broadband delivery via traditional cell towers at a lower cost than fiber deployment. FWA provides real price competition to cable broadband while reaching underserved rural and suburban communities.

FWA is cheaper to deploy than fiber, and for most homes and small businesses, fiber's gigabit speeds are overkill. Since FWA uses existing cellular networks, it works anywhere with a steady cellular signal. In remote areas, FWA competes with satellite services like Starlink, but offers lower cost, lower latency, and higher bandwidth.

Many FWA deployments use millimeter-wave spectrum, which 5G introduced but failed with mobile users due to poor building penetration and battery drain. However, these challenges don't apply to fixed stations with clear line-of-sight to a tower. FWA home units (CPEs) have larger antennas and more capable transceivers than phones, and they are plugged into wall outlets, eliminating battery concerns.

Multi-user MIMO (MU-MIMO) technology also works better with FWA. While tracking mobile users is challenging, static CPEs with steady downlink traffic are ideal for MU-MIMO. Thus, FWA not only uses fallow spectrum but also uses 5G spectrum more efficiently than mobile users. Looking ahead, 6G will expand FWA's reach with distributed MIMO, allowing homes to connect to multiple towers simultaneously, overcoming signal strength limitations.