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)}}