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OsmoSGSN » History » Revision 10

Revision 9 (laforge, 02/21/2016 03:21 PM) → Revision 10/28 (laforge, 02/21/2016 03:21 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:]] [[osmo-pcu]] or an ip.access [[OpenBSC:nanoBTS]]), 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. 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 
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