OsmoSGSN » History » Revision 13
Revision 12 (laforge, 03/06/2016 05:24 AM) → Revision 13/28 (msuraev, 07/04/2016 01:42 PM)
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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 [[OsmoPCU:]] or an ip.access [[OpenBSC: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]]
h2. 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. 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
