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About OpenBSC
About OsmoMGW
=============
OpenBSC started as a minimalistic all-in-one implementation of the GSM Network,
with particular emphasis on the functionality typically provided by the BSC,
MSC, HLR, VLR and SMSC. Today it is a growing suite of libraries and programs,
implementing protocol stacks and functional elements, including
OsmoMGW 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.
* OsmoBSC - a pure GSM BSC, speaking Abis/IP to the BTS and A/IP to the MSC
* OsmoBSC-MGCP - MGCP helper to the OsmoBSC software
* OsmoNITB - a BSC+MSC+VLR+HLR+SMSC "Network in the box".
* OsmoMSC - a voice CN with A/IP and IuCS/IP towards the BSC and/or HNB-GW
* OsmoSGSN - a GPRS SGSN with Gb/IP and IuPS/IP towards the PCU and/or HNB-GW
* Osmo-GbProxy - a Proxy to aggregate many Gb links as one Gb link to the SGSN
* OsmoBSCNAT - a gateway aggregating many A links as one A link to the MSC
* OsmoGTPHUB - a hub aggregating many GTP links (between SGSN and GGSN)
* ipaccess-utils - some tools to discover + configure ip.access nanoBTS
* bs11_config - a tool to configure the Siemens BS-11 microBTS
OsmoMGW was one of the parts split off from the old openbsc.git. It originated
as a solution to merely navigate RTP streams through a NAT, but has since
matured to a Media Gateway implementation that is capable of streaming RTP for
2G (AoIP) and 3G (IuCS) GSM networks as well as (still not implemented at time
of writing) transcoding between TRAU, various RTP payloads and IuUP.
Various interfaces towards the BTS are supported, among which are:
The OsmoMGW program exposes an MGCP interface towards clients like OsmoMSC and
OsmoBSC, and receives and sends RTP streams as configured via MGCP.
* Classic A-bis over E1 using a mISDN based E1 interface. In other
words, you can connect existing GSM Base Transceiver Station (BTS)
through E1 to OpenBSC. So far, we have made it work with the Siemens BS-11,
various Ericsson RBS2xxx BTS models and the Nokia MetroSite.
The libosmo-mgcp-client library exposes utilities used by e.g. OsmoMSC (found
in osmo-msc.git) to instruct OsmoMGW via its MGCP service.
* A-bis over IP as used by the ip.access nanoBTS product family as well as
the Open Source OsmoBTS software (by the same authors as OpenBSC). OsmoBTS
in turn supports various transceiver hardware, including the sysmoBTS
product family, as well as SDR transceivers supported by OsmoTRX, such as
the UmTRX or USRP boardss.
The libosmo-mgcp library exposes MGCP server utilities used by e.g. OsmoBSC-NAT
(found in osmo-bsc.git) to navigate RTP streams through a NAT.
(At time of writing, this is still called libosmo-legacy-mgcp.)
* IuCS and IuPS over IP towards an HNB-GW (see osmo-iuh) for UMTS (3G)
voice and data links.
Find OpenBSC online at
http://openbsc.osmocom.org/
Harald Welte <laforge@gnumonks.org>
Find OsmoMGW issue tracker and wiki online at
https://osmocom.org/projects/osmo-mgw
https://osmocom.org/projects/osmo-mgw/wiki