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Harald Welte laforge at gnumonks.orgHi Bindhu,
On Mon, Mar 14, 2016 at 01:20:11PM +0000, Bindhu Anjaneya wrote:
> As part of design consideration, we are analyzing Erlang osmo-ss7
> SIGTRAN Stack(SCCP,M3UA,SCTP) to integrate with osmo-bsc (bsc only
> mode).
> We are also analyzing the option of retaining the currently used
> libosmo-SCCP, kernel SCTP and use the M3UA from the osmo-ss7.
in terms of the encapsulation of the A-over-IP, I would suggest to not
rely on the Erlang implementations that we have. This would import a
dependency on a rather large code base for a limited functionality, and
it doesn't really resolve the question on how to interface the osmo-ss7
erlang code from C code such as OsmoBSC.
The better way to do this, from my point-of-view, is to follow what we
have done for the Osmo-Iuh code (osmo-hnbgw, and IuCS/PS for
OsmoCSCN/OsmoSGSN):
* use the SUA support of libosmo-sccp, including its SCCP-User-SAP
that it provides towards applications
This way, OsmoBSC uses the most simple SIGTRAN variant SUA towards an
external signalling gateway, and doesn't have to bother with the more
complex stacks like M3UA, M2UA, M2PA (all including SCCP).
In this way,
* osmo-bsc has a clean interface, and re-uses the code from the Iu
related projects
* you can use osmo-ss7 or any other signalling gateway (FOSS or
proprietary) to move towards M3UA or any other transport stack.
Let me know what you think about the above-mentioned approach.
Please note the SUA code in libosmo-sccp is also still limited at this
point, in a sense that it doesn't implement the ASP-Management state
machines yet. This would still have to be added. If it is added to
libosmo-sccp, then all useres, whether IuCS, IuPS or AoIP will benefit
from that.
--
- Harald Welte <laforge at gnumonks.org> http://laforge.gnumonks.org/
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