Guido Casati 3d41d28f1d RRC: enhance AMBR management in CU-CP
According to TS 38.413:

* AMBR is conditional to PDU Session Resource to setup in the Initial UE
  Context Setup procedure
* The UE Aggregate Maximum Bit Rate IE should be sent to the NG-RAN node
  if the AMF has not sent it previously. If it is included in the PDU
  SESSION RESOURCE SETUP REQUEST message, the NG-RAN node shall store
  it in the UE context
* Range is INTEGER [0..4,000,000,000,000]

To this purpose, changes in the commit:
* Init AMBR to out of range value when creating UE context
* Store AMBR in UE context whenever is received
* Assert if not set at the time of Bearer Setup (should be known at that stage)
2026-02-09 17:01:25 +01:00
2023-08-23 17:15:48 +02:00
2025-12-03 22:25:56 +01:00
2024-10-11 09:12:49 +02:00
2024-03-08 15:53:42 +01:00
2022-10-18 15:24:48 +02:00

OAI

License Supported OS Ubuntu 22 Supported OS Ubuntu 24 Supported OS RHEL9 Supported OS Fedora 41

GitLab Release (custom instance)

Docker Pulls Docker Pulls Docker Pulls Docker Pulls Docker Pulls

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
└── tools             : Tools for use by the developers/ci machines: code analysis and formatting

How to get support from the OAI Community

You can ask your question on the mailing lists.

Your email should contain below information:

  • A clear subject in your email.
  • For all the queries there should be [Query] in the subject of the email and for problems there should be [Problem].
  • In case of a problem, add a small description.
  • Do not share any photos unless you want to share a diagram.
  • OAI gNB/DU/CU/CU-CP/CU-UP configuration file in .conf format only.
  • Logs of OAI gNB/DU/CU/CU-CP/CU-UP in .log or .txt format only.
  • In case your question is related to performance, include a small description of the machine (Operating System, Kernel version, CPU, RAM and networking card) and diagram of your testing environment.
  • Known/open issues are present on GitLab, so keep checking.

Always remember a structured email will help us understand your issues quickly.

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