Robert Schmidt
cf950dfa86
Remove netlink code, and the PDCP_USE_NETLINK macro, as there is no known use, it makes the code more complicated, and is simply "technical debt". In 4G PDCP, a subtle change has been introduced, in pdcp_module_init() of pdcp.c. Looking at the diff of this commit, it can be seen that there is now a new "else-if (ENB_NAS_USE_TUN_W_MBMS_BIT)" branch that is under what was the "if (PDCP_USE_NETLINK)" branch, while the code fragment was actually inside the "else" branch of PDCP_USE_NETLINK. This seems to be necessary: previously, if we did not use noS1 mode and we don't use any TUN (i.e., the eNB), the else block would set up this interface. It is important that this interface is brought up, because if we omit it, RFsim will not work. It seems to me that this interface will regularly create some traffic; without it, RFsim will be blocked, and the UE cannot connect. In short, it seems to be important to have the MBMS interface, which injects traffic in the RFsim side, which will unblock RFsim. The change in pdcp_module_init() preserves the total changes of the if-else (PDCP_USE_NETLINK).
OpenAirInterface License
It is distributed under OAI Public License V1.1.
The license information is distributed under LICENSE file in the same directory.
Please see NOTICE file for third party software that is included in the sources.
Where to Start
Not all information is available in a central place, and information for specific sub-systems might be available in the corresponding sub-directories. To find all READMEs, this command might be handy:
find . -iname "readme*"
RAN repository structure
The OpenAirInterface (OAI) software is composed of the following parts:
openairinterface5g
├── charts
├── ci-scripts : Meta-scripts used by the OSA CI process. Contains also configuration files used day-to-day by CI.
├── CMakeLists.txt : Top-level CMakeLists.txt for building
├── cmake_targets : Build utilities to compile (simulation, emulation and real-time platforms), and generated build files.
├── common : Some common OAI utilities, some other tools can be found at openair2/UTILS.
├── doc : Documentation
├── docker : Dockerfiles to build for Ubuntu and RHEL
├── executables : Top-level executable source files (gNB, eNB, ...)
├── maketags : Script to generate emacs tags.
├── nfapi : (n)FAPI code for MAC-PHY interface
├── openair1 : Layer 1 (3GPP LTE Rel-10/12 PHY, NR Rel-15 PHY)
├── openair2 : Layer 2 (3GPP LTE Rel-10 MAC/RLC/PDCP/RRC/X2AP, LTE Rel-14 M2AP, NR Rel-15+ MAC/RLC/PDCP/SDAP/RRC/X2AP/F1AP/E1AP), E2AP
├── openair3 : Layer 3 (3GPP LTE Rel-10 S1AP/GTP, NR Rel-15 NGAP/GTP)
├── openshift : OpenShift helm charts for some deployment options of OAI
├── radio : Drivers for various radios such as USRP, AW2S, RFsim, 7.2 FHI, ...
└── targets : Some configuration files; only historical relevance, and might be deleted in the future
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