# OpenAirInterface License # OpenAirInterface is under OpenAirInterface Software Alliance license. * [OAI License Model](http://www.openairinterface.org/?page_id=101) * [OAI License v1.1 on our website](http://www.openairinterface.org/?page_id=698) It is distributed under **OAI Public License V1.1**. The license information is distributed under [LICENSE](LICENSE) file in the same directory. Please see [NOTICE](NOTICE.md) file for third party software that is included in the sources. # Where to Start # * [The implemented features](./doc/FEATURE_SET.md) * [How to build](./doc/BUILD.md) * [How to run the modems](./doc/RUNMODEM.md) # RAN repository structure # The OpenAirInterface (OAI) software is composed of the following parts:
openairinterface5g ├── ci-scripts : Meta-scripts used by the OSA CI process. Contains also configuration files used day-to-day by CI. ├── cmake_targets : Build utilities to compile (simulation, emulation and real-time platforms), and generated build files. ├── common : Some common OAI utilities, other tools can be found at openair2/UTILS. ├── doc : Contains an up-to-date feature set list and starting tutorials. ├── executables : Top-level executable source files. ├── LICENSE : License file. ├── maketags : Script to generate emacs tags. ├── nfapi : Contains the NFAPI code. A local Readme file provides more details. ├── openair1 : 3GPP LTE Rel-10/12 PHY layer / 3GPP NR Rel-15 layer. A local Readme file provides more details. │ ├── PHY │ ├── SCHED │ ├── SCHED_NBIOT │ ├── SCHED_NR │ ├── SCHED_NR_UE │ ├── SCHED_UE │ └── SIMULATION : PHY RF simulation. ├── openair2 : 3GPP LTE Rel-10 RLC/MAC/PDCP/RRC/X2AP + LTE Rel-14 M2AP implementation. Also 3GPP NR Rel-15 RLC/MAC/PDCP/RRC/X2AP. │ ├── COMMON │ ├── DOCS │ ├── ENB_APP │ ├── F1AP │ ├── GNB_APP │ ├── LAYER2/RLC/ : with the following subdirectories: UM_v9.3.0, TM_v9.3.0, and AM_v9.3.0. │ ├── LAYER2/PDCP/PDCP_v10.1.0 │ ├── M2AP │ ├── MCE_APP │ ├── NETWORK_DRIVER │ ├── NR_PHY_INTERFACE │ ├── NR_UE_PHY_INTERFACE │ ├── PHY_INTERFACE │ ├── RRC │ ├── UTIL │ └── X2AP ├── openair3 : 3GPP LTE Rel10 for S1AP, NAS GTPV1-U for both ENB and UE. │ ├── COMMON │ ├── DOCS │ ├── GTPV1-U │ ├── M3AP │ ├── MME_APP │ ├── NAS │ ├── S1AP │ ├── SCTP │ ├── SECU │ ├── TEST │ ├── UDP │ └── UTILS └── targets : Top-level wrappers for unitary simulation for PHY channels, system-level emulation (eNB-UE with and without S1), and realtime eNB and UE and RRH GW.