29 Nov
2023
29 Nov
'23
3:33 p.m.
Hi
We set up a full Osmocom platform, with an Ettus USRP for SDR. All works
well. Congratulations to Osmocom developers !
But now we want to use "real" nodes concerning MSC, MGW, HLR, SGSN & GGSN.
Do you think it is possible ?
Concerning the BSC-MSC association, do we need to use an SG (osmo-stp) ? or
could we establish a Point To Point BSC-MSC ? SUA ?
Concerning MGW, is there a way to use our MGW ? At this time, with Osmocom
corposants, we can see RTP traffic between BTS-TRX and MGW, and some MGCP
traffic between (BSC - local MGW) and MGW, and some MGCP traffic between
osmo-MGW and osmo-MSC. Is there a way to have a "more standard"
architecture: no traffic between BTS and MGW, and MGW controlled by MSC ? Do
we have to more study TRAU, AoIP ?
Concerning the Gb, do you think that it 'll work if we configure the Gb on a
real SGSN connected to the osmo-pcu, hosted on the osmo-bts-trx?
Many thanks in advance,
Best regards
Jean-Marc
Orange Restricted
29 Nov
29 Nov
3:45 p.m.
Hi Jean-Marc,
On 11/29/23 16:33, jheyrendt.ext(a)orange.com wrote:
Hi
We set up a full Osmocom platform, with an Ettus USRP for SDR. All works
well. Congratulations to Osmocom developers !
But now we want to use "real" nodes concerning MSC, MGW, HLR, SGSN & GGSN.
Not sure what do you mean with "real" here. Have I been living in some
imaginary world until now when using osmocom software?
Do you perhaps mean you want to interop with nodes from other vendors
perhaps? If that's your question, yes it's possible, there are known
setups of osmocom software running against Quortus, Ericsson, Huawei,
etc. CNs.
Do you think it is possible ?
What exactly?
Concerning the BSC-MSC association, do we need to use an SG (osmo-stp) ?
or could we establish a Point To Point BSC-MSC ? SUA ?
We don't yet support IPSP in osmocom, so you need to configure your node
and the peer as SG or ASP.
Concerning MGW, is there a way to use our MGW ? At this time, with
Osmocom corposants, we can see RTP traffic between BTS-TRX and MGW, and
some MGCP traffic between (BSC - local MGW) and MGW, and some MGCP
traffic between osmo-MGW and osmo-MSC. Is there a way to have a "more
standard" architecture: no traffic between BTS and MGW, and MGW
controlled by MSC ? Do we have to more study TRAU, AoIP ?
Not sure what you mean by "more standard architecture here. I believe
the architecture we use is a generally standard AoIP setup.
Only thing that resembles what you mention seems to be an SCCPlite setup
instead of AoIP? We do support SCCPlite in osmo-bsc too, but we still
use an osmo-mgw colocated with osmo-bsc there.
In any case, the MSC co-located MGW can be whatever MGW the MSC chooses
to use.
We didn't test any other MGW implementation using MGCP against our
osmo-bsc/osmo-msc (does it exist?)
The only one I know has been tested is iirc a Quortus MSC in SCCPlite
mode sending MGCP to our osmo-bsc, which is then forwarded to its
co-located osmo-mgw.
Concerning the Gb, do you think that it 'll work if we configure the Gb
on a real SGSN connected to the osmo-pcu, hosted on the osmo-bts-trx?
Again, if by "real" you mean some SGSN from another vendor (eg.
Ericsson), then yes, there are known cases of working setups AFAIR.
Regards,
Pau
--
- Pau Espin Pedrol <pespin(a)sysmocom.de> http://www.sysmocom.de/
=======================================================================
* sysmocom - systems for mobile communications GmbH
* Alt-Moabit 93
* 10559 Berlin, Germany
* Sitz / Registered office: Berlin, HRB 134158 B
* Geschaeftsfuehrer / Managing Director: Harald Welte
30 Nov
30 Nov
12:23 a.m.
On Wed, Nov 29, 2023 at 03:33:22PM +0000, jheyrendt.ext(a)orange.com wrote:
Concerning the BSC-MSC association, do we need to use
an SG (osmo-stp) ? or
could we establish a Point To Point BSC-MSC ? SUA ?
There is the SCCPlite variant of the A-interface, which osmocom supports, but
it is not in any active use that I know of. See
- 4.2.2.1 BSSAP/SCCPlite
- 5.4.1.2 Configure SCCPlite
in
https://ftp.osmocom.org/docs/osmo-bsc/master/osmobsc-usermanual.pdf
I think you want to use osmo-stp when possible.
Concerning MGW, is there a way to use our MGW ? At this time, with Osmocom
corposants, we can see RTP traffic between BTS-TRX and MGW, and some MGCP
traffic between (BSC - local MGW) and MGW, and some MGCP traffic between
osmo-MGW and osmo-MSC. Is there a way to have a "more standard"
architecture: no traffic between BTS and MGW, and MGW controlled by MSC ? Do
we have to more study TRAU, AoIP ?
Maybe familiarize with this chart:
https://osmocom.org/projects/cellular-infrastructure/wiki/Osmocom_Network_I…
There is lateral MGCP between BSC->MGW and MSC->MGW,
and RTP from BTS via the two MGW to the other call leg.
Concerning the Gb, do you think that it 'll work
if we configure the Gb on a
real SGSN connected to the osmo-pcu, hosted on the osmo-bts-trx?
it may work when you do the integration right =)
It would help if you were more specific, instead of "our MGW", "real
SGSN".
~N
9:17 a.m.
Hi
Many many thanks to you, Pau & Neels
Sorry for my unclear questions.
The fact is we want to test to integrate Osmocom with some Ericsson nodes:
MSC, MGW, SGSN
If we understand well, concerning the link between BSC and MSC, an OSMO-STP
is the best solution (link SCCP M3UA / declaration of AS, ASP, RK, CP, ...)
Concerning the Gb, the link with the SGSN may work. Perfect !
Concerning the CP and UP of the MGW Ericsson and MSC Ericsson, sorry for my
misunderstanding, what do you advice us ?
if we look to the schema, do we need an Osmocom-mgw ? We presume Yes
If Yes, Is it possible to just have one Osmocom-mgw hosted on the
Osmocom-bsc ?
In this case, There will be RTP traffic between Osmocom-bts and Osmocom-mgw
(hosted on Osmocom-bsc)
And there will be RTP traffic between Osmocom-mgw (hosted on Osmocom-bsc)
and mgw Ericsson.
And there will be MGCP traffic between Osmocom-mgw (hosted on Osmocom-bsc)
and Osmocom-bsc.
Best regards
Have a nice day
Jean-Marc
12:46 p.m.
Hi Jean-Marc,
On 11/30/23 10:17, jheyrendt.ext(a)orange.com wrote:
Hi
Many many thanks to you, Pau & Neels
Sorry for my unclear questions.
The fact is we want to test to integrate Osmocom with some Ericsson nodes:
MSC, MGW, SGSN
It should be indeed possible to interop with them, it's been done already.
If we understand well, concerning the link between BSC and MSC, an OSMO-STP
is the best solution (link SCCP M3UA / declaration of AS, ASP, RK, CP, ...)
That's the usual approach yes. Whatever should be fine as long as the
Ericsson peer is configured as ASP or SG.
Concerning the CP and UP of the MGW Ericsson and MSC Ericsson, sorry for my
misunderstanding, what do you advice us ?
if we look to the schema, do we need an Osmocom-mgw ? We presume Yes
If Yes, Is it possible to just have one Osmocom-mgw hosted on the
Osmocom-bsc ?
You definetly need an osmo-mgw co-located/used by osmo-bsc.
In this case, There will be RTP traffic between
Osmocom-bts and Osmocom-mgw
(hosted on Osmocom-bsc)
And there will be RTP traffic between Osmocom-mgw (hosted on Osmocom-bsc)
and mgw Ericsson.
And there will be MGCP traffic between Osmocom-mgw (hosted on Osmocom-bsc)
and Osmocom-bsc.
Correct.
In case you are interested, let me remind you that "sysmocom - systems
for mobile communications GmbH" (https://sysmocom.de) offers commercial
support contracts, in case you require further support for your specific
needs or help with integrating/interoperating against other vendors or
implementing/fixing any features.
Regards,
Pau
--
- Pau Espin Pedrol <pespin(a)sysmocom.de> http://www.sysmocom.de/
=======================================================================
* sysmocom - systems for mobile communications GmbH
* Alt-Moabit 93
* 10559 Berlin, Germany
* Sitz / Registered office: Berlin, HRB 134158 B
* Geschaeftsfuehrer / Managing Director: Harald Welte
2:46 p.m.
On Thu, Nov 30, 2023 at 09:17:58AM +0000, jheyrendt.ext(a)orange.com wrote:
if we look to the schema, do we need an Osmocom-mgw ?
We presume Yes
OsmoBSC requires a co-located MGW. So far all of our users that we know of use
osmo-mgw for that. The MGCP protocol is standardized, so it would be
interesting to interface with a third party MGW and see what happens.
If Yes, Is it possible to just have one Osmocom-mgw
hosted on the
Osmocom-bsc ?
Yes of course
In this case, There will be RTP traffic between
Osmocom-bts and Osmocom-mgw
(hosted on Osmocom-bsc)
And there will be RTP traffic between Osmocom-mgw (hosted on Osmocom-bsc)
and mgw Ericsson.
And there will be MGCP traffic between Osmocom-mgw (hosted on Osmocom-bsc)
and Osmocom-bsc.
Yes, the reason why Osmocom is divided in so many components is that you may
interface with third party components at "any" edge.
The scenario you describe above is what some of our users do: OsmoBSC is
responsible for the BSS "sphere", including the BSC co-located MGW. OsmoBSC
talks 3GPP standardized A-interface towards an Ericsson MSC. OsmoBSC does not
interact with or even needs to know anything about the MSC's MGW setup, it only
sends the call leg's RTP to the RTP address:port that the MSC indicated in the
BSSAP Assignment Command. It does not matter what component/what brand of MGW
that RTP address:port belongs to, as far as the BSC is concerned.
Of course the hard part is configuring all the details correctly. Sometimes we
also need to resolve a customer's CN's specific peculiarities by implementing
new features, and occasionally we find and fix bugs in Osmocom that we did not
know about yet. So if you have problems with integration that you need
assistance with, one option is the dedicated commercial support that is
available for Osmocom, for example from info(a)sysmocom.de (my employer). You may
also get assistance here on this mailing list, where individual community
members invest their own free time free of charge.
~N
--
- Neels Hofmeyr <nhofmeyr(a)sysmocom.de> http://www.sysmocom.de/
=======================================================================
* sysmocom - systems for mobile communications GmbH
* Alt-Moabit 93
* 10559 Berlin, Germany
* Sitz / Registered office: Berlin, HRB 134158 B
* Geschäftsführer / Managing Directors: Harald Welte
3:51 p.m.
Dear all
Many thanks again for your help.
We try to configure ourselves Osmocom & Ericsson nodes, and we'll ask you
some assistance if needed.
Best regards
Jean-Marc HEYRENDT
Orange Labs
-----Message d'origine-----
De : Neels Hofmeyr <nhofmeyr(a)sysmocom.de>
Envoyé : jeudi 30 novembre 2023 15:46
À : HEYRENDT Jean Marc Ext DSCS/DSEC <jheyrendt.ext(a)orange.com>
Cc : openbsc(a)lists.osmocom.org
Objet : Re: Questions on OSMOCOM & real nodes integration
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On Thu, Nov 30, 2023 at 09:17:58AM +0000, jheyrendt.ext(a)orange.com wrote:
if we look to the schema, do we need an Osmocom-mgw ?
We presume Yes
OsmoBSC requires a co-located MGW. So far all of our users that we know of
use osmo-mgw for that. The MGCP protocol is standardized, so it would be
interesting to interface with a third party MGW and see what happens.
If Yes, Is it possible to just have one Osmocom-mgw
hosted on the
Osmocom-bsc ?
Yes of course
In this case, There will be RTP traffic between
Osmocom-bts and
Osmocom-mgw (hosted on Osmocom-bsc) And there will be RTP traffic
between Osmocom-mgw (hosted on Osmocom-bsc) and mgw Ericsson.
And there will be MGCP traffic between Osmocom-mgw (hosted on
Osmocom-bsc) and Osmocom-bsc.
Yes, the reason why Osmocom is divided in so many components is that you may
interface with third party components at "any" edge.
The scenario you describe above is what some of our users do: OsmoBSC is
responsible for the BSS "sphere", including the BSC co-located MGW. OsmoBSC
talks 3GPP standardized A-interface towards an Ericsson MSC. OsmoBSC does
not interact with or even needs to know anything about the MSC's MGW setup,
it only sends the call leg's RTP to the RTP address:port that the MSC
indicated in the BSSAP Assignment Command. It does not matter what
component/what brand of MGW that RTP address:port belongs to, as far as the
BSC is concerned.
Of course the hard part is configuring all the details correctly. Sometimes
we also need to resolve a customer's CN's specific peculiarities by
implementing new features, and occasionally we find and fix bugs in Osmocom
that we did not know about yet. So if you have problems with integration
that you need assistance with, one option is the dedicated commercial
support that is available for Osmocom, for example from info(a)sysmocom.de (my
employer). You may also get assistance here on this mailing list, where
individual community members invest their own free time free of charge.
~N
--
- Neels Hofmeyr <nhofmeyr(a)sysmocom.de> http://www.sysmocom.de/
=======================================================================
* sysmocom - systems for mobile communications GmbH
* Alt-Moabit 93
* 10559 Berlin, Germany
* Sitz / Registered office: Berlin, HRB 134158 B
* Geschäftsführer / Managing Directors: Harald Welte
635
days inactive
636
days old
6 comments
3 participants
participants (3)
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jheyrendt.ext＠orange.com -
Neels Hofmeyr -
Pau Espin Pedrol