OsmoSGSN » History » Revision 27
Revision 26 (laforge, 03/04/2020 08:25 PM) → Revision 27/28 (nickvsnetworking, 01/02/2022 08:40 PM)
{{>toc}}
h1. [[OsmoSGSN:]]
Serving GPRS Support Node (SGSN). As such it implements the GPRS Mobility Management (GMM) and SM (Session Management).
The SGSN implements
* the Gb interface to the BSS's (like the [[OsmoPCU:]] or an ip.access [[OpenBSC:nanoBTS]])
* the Gp interface with its GTP protocol to one or more Gateway GPRS Support Node (GGSN) like [[OpenGGSN:OsmoGGSN]].
* the IuPS interface with its RANAP protocol to one onre or more RNCs or HNB-GWs like [[OsmoHNBGW:]]
* the [[cellular-infrastructure:GSUP]] Interface/Protocol towards [[OsmoHLR:]]
[[OsmoSGSN:]] is available from the http://git.osmocom.org/osmo-sgsn/ repository. In order to build it, you will need a libgtp installation from the
[[OpenGGSN:OsmoGGSN]] project.
h2. Position in a typical Osmocom network
For a more complete graph, see [[Cellular-Infrastructure:Osmocom Network In The Box]]
{{graphviz_link()
digraph G {
rankdir = LR;
OsmoBTS -> OsmoBSC [label="Abis/IP"];
OsmoBSC -> OsmoMSC [label="3GPP AoIP"];
OsmoBTS -> OsmoPCU [label="pcu_sock"];
OsmoPCU -> OsmoSGSN [label="Gb/IP"];
OsmoMSC -> OsmoHLR [label="GSUP"];
OsmoSGSN -> OsmoHLR [label="GSUP"];
hNodeB -> OsmoHNBGW [label="Iuh"];
OsmoHNBGW -> OsmoMSC [label="IuCS"];
OsmoHNBGW -> OsmoSGSN [label="IuPS"];
OsmoSGSN -> OsmoGGSN [label="Gp"];
OsmoGGSN -> Internet [label="Gi"];
OsmoSGSN [color=red];
}
}}
h2. Setup / Configuration
For more information regarding the setup + configuration, refer to [[cellular-infrastructure:OpenBSC_GPRS]]
{{include(cellular-infrastructure:MacroBinaryPackages)}}
h2. User Manuals
* User Manual: http://ftp.osmocom.org/docs/latest/osmosgsn-usermanual.pdf
* VTY Reference: http://ftp.osmocom.org/docs/latest/osmosgsn-vty-reference.pdf
h2. Source code
The source code is available from @git.osmocom.org@ (module @osmo-sgsn@).
Public read-only access is available via
<pre>
git clone git://git.osmocom.org/osmo-sgsn.git
</pre>
You can browse it via cgit: https://git.osmocom.org/osmo-sgsn
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/mgw
* results: https://jenkins.osmocom.org/jenkins/view/TTCN3/job/ttcn3-mgw-test/
h2. Contact / Getting Help
Contact us via the @osmocom-net-gprs@ mailing list, see [[Cellular-Infrastructure:Mailing Lists]].
You can file issues (bugs / feature requests) using the redmine project you're currently viewing.
h2. TODO list
For details see the Issue tracker above. Roughly, Roughtly, the following areas are in need of attention:
* secondary PDP contexts
* persistent storage of GMM and SM state
* recovery from GGSN outages
* SMS delivery via GPRS
* network-initiated PDP context activation
{{include(cellular-infrastructure:MacroCommercialSupport)}}
