Hi Jean-Marc,
On 11/29/23 16:33, jheyrendt.ext@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