移動通信・代替わり

Image from a newspaper article showing how mobile communications technology has changed every 10 years, from 1980 until 5G's planned 2020 launch:

移動通信技術はほぼ10年ごとに代替わりしている。

The same word comes up again over a year earlier — see the May 2018 entry, written right as 5G was first being introduced in Japan.