OsmoSGSN » History » Revision 9
Revision 8 (laforge, 02/20/2016 07:19 PM) → Revision 9/28 (laforge, 02/21/2016 03:21 PM)
{{>toc}} h1. [[OsmoSGSN]] Serving GPRS Support Node (SGSN). As such it implements the GPRS Mobility Management (GMM) and SM (Session Management). The SGSN connects via the Gb-Interface to the BSS (like the [[osmo-pcu]] or an ip.access nanoBTS), and it connects via the GTP protocol to a Gateway GPRS Support Node (GGSN) like [[OpenGGSN]]. [[OsmoSGSN]] is part of the openbsc git repository. In order to build it, you will need a libgtp installation from the [[OpenGGSN]] project. h2. Setup / Configuration For more information regarding the setup + configuration, refer to [[cellular-infrastructure:OpenBSC_GPRS]] [[OpenBSC_GPRS]] h2. TODO list * use the [[OsmoNITB]] HLR to identify (and possibly authenticate) subscribers * secondary PDP contexts * persistent storage of GMM and SM state * recovery from GGSN outages * SNDCP header and data compression * use proper XID exchange and actually use the results to configure the LLC SAPIs * GEA3 encryption * SMS delivery via GPRS * network-initiated PDP context activation