Osmocom Mobile Switching Centre
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Vadim Yanitskiy c6921e5068 mncc: rework passing GCR over the MNCC interface
Using *unpacked* 'struct osmo_gcr_parsed' in the MNCC PDUs makes
the protocol even more complicated than it currently is, and
moreover complicates implementing MNCCv8 in the ttcn3-sip-test.

Replace 'struct osmo_gcr_parsed' in 'struct gsm_mncc' with a
fixed-length buffer, which is supposed to hold the Global Call
Reference encoded as per 3GPP TS 29.205.

Indicate presence of GCR using the MNCC_F_GCR flag.

Change-Id: I259b6d7e4cbe26159b9b496356fc7c1c27d54521
Fixes: I705c860e51637b4537cad65a330ecbaaca96dd5b
Related: OS#5164, OS#5282
2021-11-03 21:12:52 +00:00
contrib contrib/osmo-msc.spec.in: require libosmo-ranap >= 0.7.0 2021-09-16 14:34:18 +02:00
debian Bump version: 1.6.1.98-cad22-dirty → 1.7.0 2021-02-23 20:22:34 +01:00
doc running.adoc: add section about MGCP configuration 2021-08-03 11:36:25 +02:00
include mncc: rework passing GCR over the MNCC interface 2021-11-03 21:12:52 +00:00
m4 move openbsc/* to repos root 2017-07-12 23:17:10 +00:00
src mncc: rework passing GCR over the MNCC interface 2021-11-03 21:12:52 +00:00
tests mncc: rework passing GCR over the MNCC interface 2021-11-03 21:12:52 +00:00
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.gitreview update .gitreview to new repo url 2017-08-08 17:26:28 +02:00
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Makefile.am manuals: generate vty reference xml at build time 2020-07-12 12:30:28 +00:00
README README update. Explain more what it is than just the history 2021-01-06 13:13:46 +01:00
README.vty-tests Remove obsolete ./configure option 2017-11-29 14:24:54 +00:00
TODO-RELEASE support A5/4 in inter-BSC handover 2021-06-24 01:44:17 +02:00
configure.ac configure.ac: Depend on newer libosmo-ranap 2021-02-23 20:47:57 +01:00
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osmoappdesc.py osmoappdesc.py, tests: switch to python 3 2019-12-12 09:29:19 +00:00

README

About OsmoMSC
=============

OsmoMSC is an implementation of the 3GPP MSC (Mobile Switching Centre)
network element.  It implements the following core functionality within
the 2G (GSM) and 3G (UMTS) networks:

* mobility management
* call control (either via built-in MNCC handler or external osmo-sip-connector)
* USSD (exposed via GSUP)
* SMS (either via built-in SMSC or external via GSUP)

Historically, OsmoMSC originated from the OpenBSC project, which started
as a minimalistic all-in-one implementation of the GSM Network. In 2017,
OpenBSC 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. Before,
it was the libmsc part of the old OsmoNITB. Since a true A interface and
IuCS for 3G support is available, OsmoMSC exists only as a separate
standalone entity.

OsmoMSC exposes
- GSUP towards OsmoHLR (or a MAP proxy);
- A over IP towards a BSC (e.g. OsmoBSC);
- IuCS towards an RNC or HNB-GW (e.g. OsmoHNBGW) for 3G voice;
- MNCC (Mobile Network Call Control derived from GSM TS 04.07);
- SMPP 3.4 (Short Message Peer-to-Peer);
- The Osmocom typical telnet VTY and CTRL interfaces.

Find OsmoMSC issue tracker and wiki online at
https://osmocom.org/projects/osmomsc
https://osmocom.org/projects/osmomsc/wiki