OpenAirInterface is under GNU GPLv3 license. The full GNU General Public License is included in this distribution in the file called "COPYING".The OpenAirInterface (OAI) software is composed of six different parts:
openair2: 3GPP LTE Rel-9 RLC/MAC/PDCP/RRC implementations, eNB application, X2AP. Note that for RLC, the following versions are userL UM_v9.3.0, TM_v9.3.0, and AM_v9.3.0. For PDCP, PDCP_v10.1.0 is used. For RRC, only LITE is used.
targets: scripts to compile and lauch different system targets (simulation, emulation and real-time platforms, user-space tools for these platforms (tbd)) see README files in these subdirectories for more informationsee also https://twiki.eurecom.fr/twiki/bin/view/OpenAirInterface/WebHome