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 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.
Setup / Configuration¶
For more information regarding the setup + configuration, refer to OpenBSC_GPRS
Manuals¶
- User Manual: http://ftp.osmocom.org/docs/latest/osmosgsn-usermanual.pdf
- VTY Reference: http://ftp.osmocom.org/docs/latest/osmosgsn-vty-reference.pdf
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
- SMS delivery via GPRS
- network-initiated PDP context activation