Indoor cellular systems have been around for decades. But with the generational shift from 4G to 5G, they are widely expected to become even more necessary and widespread.
There are several reasons for these expectations of growth. For one, most cellular data use happens indoors, and mobile devices are continuing their rapid proliferation and using even more data. Cisco’s Annual Internet Report estimates that by 2023, there will be 8.7 billion handheld/personal mobile devices globally, and 4.4 billion machine-to-machine/IoT devices. By 2023, Cisco estimates that there will be 3.6 connected devices per person on a global basis, with 45% of devices connected via cellular networks and 55% via Wi-Fi or wired connections.