• Table of contents
• OsmoSGSN
  • Position in a typical Osmocom network
  • Setup / Configuration
  • Binary packages
  • Manuals
  • TODO list
  • Contact

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 nanoBTS)
• the Gp interface with its GTP protocol to one or more Gateway GPRS Support Node (GGSN) like OsmoGGSN.
• the IuPS interface with its RANAP protocol to onre or more RNCs or HNB-GWs like OsmoHNBGW
• the 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
OsmoGGSN project.

Position in a typical Osmocom network¶

For a more complete graph, see [[Cellular Infrastructure:Osmocom Network In The Box]]

Setup / Configuration¶

For more information regarding the setup + configuration, refer to OpenBSC_GPRS

Binary packages¶

OsmoSGSN packages are created as part of the Osmocom nightly Debian/Ubuntu builds, see NightlyBuilds

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¶

For details see the Issue tracker above. 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

Contact¶

• Contact us via the osmocom-net-gprs@ mailing list, see [[Cellular Infrastructure:Mailing Lists]].
• Contributions are welcome via [[Cellular Infrastructure:Gerrit]].
• Git repository browser at https://git.osmocom.org/osmo-sgsn