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Osmocom Serving GPRS Support Node for 2G(GPRS) and 3G(UMTS) https://osmocom.org/projects/osmosgsn
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README.md

osmo-sgssn - Osmocom SGSN Implementation

This repository contains a C-language implementation of a GSM Serving GPRS Support Node (SGSN) for 2G (GSM) and 3G (UMTS). It is part of the Osmocom Open Source Mobile Communications project.

OsmoSGSN exposes

  • Gb towards PCUs (e.g. OsmoPCU): Various GbIP flavors + Gb/FR/E1
  • GTP towards a GGSN (e.g. OsmoGGSN);
  • IuPS over IP towards RNCs / HNBGW (e.g. osmo-hnbgw)
  • The Osmocom typical telnet VTY and CTRL interfaces.
  • The Osmocom typical statsd exporter.
  • GSUP (custom MAP-like protocol) towards osmo-hlr

OsmoSGSN implements

  • GPRS mobility management
  • GPRS session management

Homepage

You can find the OsmoSGSN issue tracker and wiki online at https://osmocom.org/projects/osmosgsn and https://osmocom.org/projects/osmosgsn/wiki.

GIT Repository

You can clone from the official osmo-sgsn.git repository using

    git clone https://gitea.osmocom.org/cellular-infrastructure/osmo-sgsn

There is a web interface at https://gitea.osmocom.org/cellular-infrastructure/osmo-sgsn

Documentation

User Manuals and VTY reference manuals are [optionally] built in PDF form as part of the build process.

Pre-rendered PDF version of the current "master" can be found at User Manual as well as the VTY Reference Manual

Mailing List

Discussions related to osmo-sgsn are happening on the osmocom-net-gprs@lists.osmocom.org mailing list, please see https://lists.osmocom.org/postorius/lists/osmocom-net-gprs.lists.osmocom.org/ for subscription options and the list archive.

Please observe the Osmocom Mailing List Rules when posting.

Contributing

Our coding standards are described at https://osmocom.org/projects/cellular-infrastructure/wiki/Coding_standards

We us a gerrit based patch submission/review process for managing contributions. Please see https://osmocom.org/projects/cellular-infrastructure/wiki/Gerrit for more details

The current patch queue for osmo-sgsn can be seen at https://gerrit.osmocom.org/#/q/project:osmo-sgsn+status:open

History

OsmoSGSN originated from the OpenBSC project, as a separate program within openbsc.git. In 2017, OpenBSC was split in separate repositories, and hence OsmoSGSN was given its own separate git repository.