Cellular Network Infrastructure » Core Network (CN) » OsmoCBC

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h1. OsmoCBC

This is the upcoming Osmocom Cell Broadcast Centre.

h2. Introduction

You can find more information about Cell Broadcast in general at [[cellular-infrastructure:Cell_Broadcast]] and [[cellular-infrastructure:Service_Area_Broadcast]], as well as [[cellular-infrastructure:Emergency_Warning]] and [[cellular-infrastructure:Public_Warning_System]].  The pages include pointers to the relevant specifications.

h2. Position in the network

The below graph shows the CBC in the network.

{{graphviz_link()

digraph G {

  rankdir = RL;

  CBC [color=red];

  CBE -> CBC [label="REST/JSON"];

  CBC -> BSC [label="CBSP"];

  CBC -> RNC [label="SABP", style="dashed"];

  CBC -> MME [label="SBc-AP"];

  BSC -> BTS [label="A-bis RSL"];

  RNC -> NodeB [label="Iub"];

  MME -> eNodeB [label="S1-AP"];

  BTS -> UE [label="CBCH"];

  NodeB -> UE [label="BMC/CTCH"];

  eNodeB -> UE [label="SIB10/11/12"];

}

}}

As can be seen, the CBC receives messages from third-party applications (called CBEs). It then routes/distributes/forwards those messages over the respective radio access technology specific method.

h2. History

OsmoCBC was originally developed in 2019 under a so-called "prototype fund":https://prototypefund.de/ grant of the German Federal Ministry of Education and Research.

In August 2022, osmo-cbc was extended with support for LTE/4G by introducing the SBcAP interface, under a "grant of the NLnet foundation":https://nlnet.nl/project/OsmoCBC/

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h2. Manuals

* osmo-cbc User Manual: https://ftp.osmocom.org/docs/latest/osmocbc-usermanual.pdf

* osmo-cbc VTY Reference: https://ftp.osmocom.org/docs/latest/osmocbc-vty-reference.pdf

See also the [[Quick_SMSCB_HOWTO]]

h2. Source Code

The source code is available from @gitea.osmocom.org@ (module @osmo-cbc@).

Public read-only access is available via

<pre>

git clone https://gitea.osmocom.org/cellular-infrastructure/osmo-cbc

</pre>

You can browse it via gitea: https://gitea.osmocom.org/cellular-infrastructure/osmo-cbc

Contributions are welcome via [[cellular-infrastructure:Gerrit]].

h2. Test Suite

We have a TTCN-3 test suite as part of our [[cellular-infrastructure:Titan_TTCN3_Testsuites]]

* source code: https://gitea.osmocom.org/ttcn3/osmo-ttcn3-hacks/src/branch/master/cbc

* results: https://jenkins.osmocom.org/jenkins/job/ttcn3-cbc-test/

h2. Contact

* Contact us via the openbsc@ mailing list, see [[cellular-infrastructure:Mailing Lists]].

* Contributions are welcome via [[cellular-infrastructure:Gerrit]].

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