Today, the interface between the BBU and RU in 4G LTE is proprietary to mobile equipment vendors. It is based on the Common Public Radio Interface (CPRI 2) interface, but this is not an open interface ...

The arrival of affordable software defined radio technologies over the last ... they will usually rely on a host computer for their interface. Thus the experience is one of clicking mouse buttons ...

In the subsequent 4G/LTE architecture, voice and data are both based on IP packets. The GERAN (GSM EDGE Radio Access Network) is the 2G air interface, and the UTRAN (Universal Terrestrial Radio ...