how about for LTE? what do you call it?
when you say Node B, it denotes the base transceiver station part of UMTS. so there’s no problem in saying 3G BTS and its acceptable..
of course there;s nothing like the BTS of GSM because it won;t work with UMTS directly. they might share resources only (antenna, feeder etc) meaning an RBS2206 is not home to an RNC but BSC.