OsmoMSC » History » Revision 16
Revision 15 (laforge, 05/11/2018 11:15 AM) → Revision 16/19 (laforge, 10/28/2018 09:05 PM)
h1. OsmoMSC OsmoMSC is the Osmocom implementation of a Mobile Switching Center (MSC). It implements the following interfaces: * 3GPP AoIP over M3UA or SUA towards BSCs, for example [[OsmoBSC:]], possibly via a STP like [[OsmoSTP:]] * 3GPP IuCS over M3UA or SUA towards RNCs or HNBGWs, for example [[OsmoHNBGW:]], possibly via a STP like [[OsmoSTP:]] * Osmocom [[cellular-infrastructure:GSUP]] towards an HLR such as [[OsmoHLR:]] * [[SMPP]] SMPP v3.4 for external SMS entities (minimal SMSC is built-in) * [[MGCP]] MGCP for controlling an external Media Gateway like [[OsmoMGW:]] * [[MNCC]] MNCC for external call-control handlers, such as [[osmo-sip-connector:]] for SIP trunks * Osmocom VTY interface for configuration + introspection * Osmocom CTRL interface for programmatic access to internal state/configuration h2. Position in a typical network {{graphviz_link() digraph G { rankdir = LR; OsmoBTS -> OsmoBSC [label="Abis/IP"]; OsmoBSC -> OsmoMSC [label="3GPP AoIP"]; hNodeB -> OsmoHNBGW [label="Iuh"]; OsmoHNBGW -> OsmoMSC [label="IuCS"]; OsmoMSC -> OsmoHLR [label="GSUP"]; OsmoMSC -> OsmoSIP [label="MNCC"]; OsmoMSC [color=red]; { rank=same; OsmoMSC; OsmoMGW }; OsmoMSC -> OsmoMGW [label="MGCP"]; OsmoSIP [label="osmo-sip-connector"]; OsmoSIP -> PBX [label="SIP Trunk"]; } }} h2. History OsmoMSC was the result of splitting [[OsmoNITB:]] into three parts during the 2017 NITB-split. Parts of [[OsmoNITB:]] became [[OsmoBSC:]], other parts became [[OsmoHLR:]], while the mobility management, call control and SMS handling became [[OsmoMSC:]]. At the time of the rewrite, the entire MSC and VLR state machines have been properly re-implemented using "osmo-fsm":http://ftp.osmocom.org/api/latest/libosmocore/core/html/group__fsm.html {{include(cellular-infrastructure:MacroBinaryPackages)}} h2. Manuals * "osmomsc-usermanual.pdf":http://ftp.osmocom.org/docs/latest/osmomsc-usermanual.pdf * "osmomsc-vty-reference.pdf":http://ftp.osmocom.org/docs/latest/osmomsc-vty-reference.pdf h2. Source code The source code is available from @git.osmocom.org@ (module @osmo-msc@). Public read-only access is available via <pre> git clone git://git.osmocom.org/osmo-msc.git </pre> You can browse it via cgit: https://git.osmocom.org/osmo-msc 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: http://git.osmocom.org/osmo-ttcn3-hacks/tree/msc * results: https://jenkins.osmocom.org/jenkins/view/TTCN3/job/ttcn3-msc-test/ h2. Contact * Contact us via the openbsc@ mailing list, see [[cellular-infrastructure:Mailing Lists]]. * Contributions are welcome via [[cellular-infrastructure:Gerrit]]. * Git repository browser at https://git.osmocom.org/osmo-msc