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gerrit.osmocom.org / osmo-msc / f663f4ea536b94bd68a41a714d1dbb33855c8a5d
commitf663f4ea536b94bd68a41a714d1dbb33855c8a5d[log] [tgz]
authorVadim Yanitskiy <fixeria@osmocom.org>Sat Sep 28 14:20:03 2024 +0700
committerVadim Yanitskiy <vyanitskiy@sysmocom.de>Sun Sep 29 02:13:34 2024 +0700
tree4bfb6eb27294877d03678dd6d87ba01b995b380c
parenta980c57a610484f5dd657c7b6a2198d4c22cd345 [diff]
silent-call: add CSD channel modes

This is useful for BER testing and figuring out if the baseband
supports the requested channel mode, e.g. half-rate data calls.

Going below 2.4k (0.6k, 1.2k, 1.2k_75) makes no sense, because:

* these rates are carried by TCH/[FH]2.4 channels anyway, and
* we never tell the user data rate to the MS (part of CC SETUP)

The same applies to transparent vs non-transparent channel modes,
but let's add non-transparent variants anyway, just in case the
BTS PHY does not support transparent modes.

Change-Id: Ife83f5bcb2b68a228a014f47c7cbb21660290593
1 file changed
tree: 4bfb6eb27294877d03678dd6d87ba01b995b380c
  1. .github/
  2. contrib/
  3. debian/
  4. doc/
  5. include/
  6. m4/
  7. src/
  8. tests/
  9. .gitignore
  10. .gitreview
  11. .mailmap
  12. AUTHORS
  13. configure.ac
  14. COPYING
  15. git-version-gen
  16. Makefile.am
  17. osmoappdesc.py
  18. README.md
  19. README.vty-tests
  20. TODO-RELEASE
README.md

osmo-msc - Osmocom MSC Implementation

This repository contains a C-language implementation of a GSM Mobile Switching Centre (MSC) for 2G (GSM) and 3G (UMTS). It is part of the Osmocom Open Source Mobile Communications project.

OsmoMSC exposes

  • A over IP towards BSCs (e.g. osmo-bsc: 3GPP AoIP or SCCPlite
  • IuCS over IP towards RNCs / HNBGW (e.g. osmo-hnbgw)
  • MGCP towards a co-located osmo-mgw for the RTP streams
  • GSUP (instead of 3GPP MAP) towards osmo-hlr
  • SMPP towards any external SMS sending/receiving applications
  • MNCC as external call-control interface towards e.g. osmo-sip-connectr
  • The Osmocom typical telnet VTY and CTRL interfaces.
  • The Osmocom typical statsd exporter.

OsmoMSC implements

  • mobility management
  • call control (either via built-in MNCC handler or external osmo-sip-connector)
  • voice group call (VGCS) and voice broadcast calls (VBS) as used in GSM-R
  • USSD (exposed via GSUP)
  • SMS (either via built-in SMSC or external via GSUP)

Homepage

You can find the OsmoMSC home page and wiki online at https://osmocom.org/projects/osmomsc/wiki.

GIT Repository

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

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

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

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

Forum

We welcome any osmo-msc related discussions in the Cellular Network Infrastructure -> 2G/3G CN section of the osmocom discourse (web based Forum).

Mailing List

Discussions related to osmo-msc are happening on the openbsc@lists.osmocom.org mailing list, please see https://lists.osmocom.org/mailman/listinfo/openbsc for subscription options and the list archive.

Please observe the Osmocom Mailing List Rules when posting.

Issue Tracker

We use the issue tracker of the osmo-msc project on osmocom.org for tracking the state of bug reports and feature requests. Feel free to submit any issues you may find, or help us out by resolving existing issues.

Contributing

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

We use 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-msc can be seen at https://gerrit.osmocom.org/#/q/project:osmo-msc+status:open

History

OsmoMSC originated from the OsmoNITB project, which started as a minimalistic all-in-one implementation of the GSM Network. In 2017, OsmoNITB had reached maturity and diversity (including M3UA SIGTRAN and 3G support in the form of IuCS and IuPS interfaces) that naturally lead to a separation of the all-in-one approach to fully independent separate programs as in typical GSM networks.

OsmoMSC was one of the parts split off from the old openbsc.git.