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Harald Welte cb8f443399 implement proper SAPI3 handling for SMS 
SM's need to be transferred over their own RLL connection on SAPI3, rather than
the default SAPI0 connection that we're using for signalling like 04.08
RR/MM/CC.

This is not that much of a problem in the case of SMS SUBMIT from the MS to
the netwrok.  In that case, the MS will start its primary RLL connection
with SAPI3, and we can just respond with SAPI3.

However, in the case of SMS DELIVER to a MS, we first page the MS, it then
establishes SAPI0.  We then need to explicitly request the establishment of
a SAPI3 RLL connection, before we can send CP-DATA with our RP-DATA and DELIVER
RPDU

Now that we have the bsc_rll.c code, we can actually wait for a paging
response, and from the paging response request the establishment of the SAPI3
connection.  We will be called back once that connection is open and can
successively start transmission of the SM.
 		2009-08-09 14:59:02 +02:00
..
doc move openbsc into its own subdirectory 2009-06-10 05:40:52 +08:00
include implement proper SAPI3 handling for SMS 2009-08-09 14:59:02 +02:00
src implement proper SAPI3 handling for SMS 2009-08-09 14:59:02 +02:00
tests db_test.c: Make it compile again 2009-07-29 06:46:07 +02:00
tools move openbsc into its own subdirectory 2009-06-10 05:40:52 +08:00
AUTHORS move openbsc into its own subdirectory 2009-06-10 05:40:52 +08:00
COPYING move openbsc into its own subdirectory 2009-06-10 05:40:52 +08:00
Makefile.am move openbsc into its own subdirectory 2009-06-10 05:40:52 +08:00
README move openbsc into its own subdirectory 2009-06-10 05:40:52 +08:00
configure.in [channel] Add a test case for the request foo in gsm_subscriber.c 2009-06-10 13:26:47 +02:00
openbsc.pc.in move openbsc into its own subdirectory 2009-06-10 05:40:52 +08:00

README 

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

OpenBSC is a minimalistic implementation of the GSM Network, with particular
emphasis on the functionality typically provided by the BSC, MSC, HLR, VLR.

Its only current interface is a mISDN based E1 interface utilizing the A-bis
protocol between BSC and BTS.  In other words, you can connect an existing
GSM Base Transceiver Station (BTS) through E1 to OpenBSC.

So far, it has only been tested with the Siemens microBTS BS-11.  Test reports
with other BTS are appreciated!

This project is still in its early days, and there are lots of areas where it
doesn't behave as per GSM spec.

December 29, 2008
	Harald Welte <laforge@gnumonks.org>