OpenBSC -> only BTS+RNC+MSC+HLR without BSC possible?

historical

Ellen,

On Fri, Jun 22, 2012 at 01:30:45PM +0200, Ellen Apolinar wrote:
> 1st idea: Implement OpenBSC for several BTS, also for UMTS.

There are no BTS in UMTS.  There is no BSC in UMTS.  There's only NodeB,
RNC.  As the Iub interface is completely unlike Abis, and UMTS (except
call control and sms) is completely unlike GSM, I really don't
understand what a BTS and a BSC would have to do with UMTS.

> how to build libs to implement the BTS to the OpenBSC-project. I don't know
> if it is possible and how long it takes. We will see it.

If you are talking about a classic GSM BTS that speaks a dialect of
A-bis RSL (08.58), adding support for them to OpenBSC shouldn be hard.
Can you give us a list of BTS models that you're looking to support?

Also, just to make sure, I suppose you are planning to actively submit
or at least release the source code modifications to OpenBSC.  We are
more than happy to add more A-bis dialects.

As soon as you operate a network with it, or you distribute the code to
any other entity, the AGPLv3 license requires you to release the source
code to all your additions/modifications anyway.

Based on past experience, I would say adding support for a new Abis
variant is an effort somewhere between one and three man-weeks for a
developer already familiar with OpenBSC internals and APIs.

> 2nd idea: Have a BTS - RNC - MSC - HLR - connection with parts of OpenBSC.

Have you actually studied the specifications?  Do you realize that the
RNC-MSC interface is RANAP based.  Do you realize that those interfaces
and protocols are nothing like anything that exists in GSM or OpenBSC?

Regards,
	Harald
-- 
- Harald Welte <laforge at gnumonks.org>           http://laforge.gnumonks.org/
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