In this video you can see a quick demo of a LimeNET Mini being used together with the Osmocom GSM stack to create a self-contained GSM network. That is to say, running a base transceiver station (BTS) with an SDR layer 1 implemented via the LimeSDR-USB board, plus a base station controller (BSC) and mobile switching center (MSC) etc. -- all on the same compact system.
Of course, you could just as easily instead run only the BTS on the LimeNET Mini and have this connect to a BSC and other network functions running elsewhere. In addition to handling calls and text messages, it would also be possible to add the Osmocom PCU and SGSN etc. into the mix to provide a GPRS service for M2M and IoT etc. applications.
Andrew and the LimeNET Team