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Max 1b76a03cdd DTX DL: Add FACCH cache 
When DL DTX is active and silent period is in progress dtx.cache is
populated by SID UPDATE message which about to be scheduled next. If at
that moment FACCH message arrives (which have higher priority) we have
to send ONSET message to L1 but we can't invalidate cache with SID
UPDATE as it will be used for SID FIRST message to resume silent period
after FACCH transmission is over (provided there were no incoming voice
in between). Hence the necessity for separate buffer to store content of
FACCH message while we're sending ONSET to L1 while keeping SID UPDATE
cached.

Change-Id: I316e81af893b24766bf259baaed7a0be75a11694
Related: OS#1801
 		2016-10-28 09:25:47 +00:00
..
contrib Add web proxy for control interface 2016-08-11 06:05:39 +00:00
doc Consistenly format variables in */Makefile.am files 2016-09-15 15:55:02 +02:00
include DTX DL: Add FACCH cache 2016-10-28 09:25:47 +00:00
src bsc: count the usage of codec by setting the lchan active 2016-10-27 10:17:58 +00:00
tests msgb ctx: use new msgb_talloc_ctx_init(), don't access talloc_msgb_ctx 2016-10-13 13:14:41 +00:00
tools
…
.gitignore V.42bis: integration and unit test 2016-09-24 03:17:59 +00:00
AUTHORS AUTHORS: Add Jacob and Neels 2015-12-05 23:04:11 +01:00
COPYING License change: We are now AGPLv3+ instead of GPLv2+ 2011-01-01 15:39:34 +01:00
Makefile.am Consistenly format variables in */Makefile.am files 2016-09-15 15:55:02 +02:00
README openbsc/README: some fixes, add CSCN and Iu* 2016-01-28 13:36:07 +01:00
README.vty-tests Add README.vty-tests 2016-01-28 13:36:07 +01:00
configure.ac configure: check for pkg-config presence 2016-10-01 01:01:53 +02:00
git-version-gen
…
openbsc.pc.in
…
osmoappdesc.py gtphub: Fix the VTY prompt to make the tests move forward 2015-12-14 15:24:50 +01:00

README 

About OpenBSC
=============

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

 * 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".
 * OsmoCSCN - 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

Various interfaces towards the BTS are supported, among which are:

 * 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.

 * 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.

 * 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>