14 Mar
2025
14 Mar
'25
2:16 p.m.
Dear Sandeep,
thanks for your first message to the openbcs mailing list.
On Tue, Mar 04, 2025 at 12:57:19PM +0000, Sandip Biswas wrote:
I want to integrate EPC core (Open5GS) with
open-source SGSN, It would be very helpful if anyone can share any document where I can
find the installation steps and all.
In case this is a commercial inquiry, you can always reach out to companies and/or
freelancers providing paid services around open5gs and/or osmocom.
Your subject mentions S3/S4. This appears to imply that osmo-sgsn implements the
S4 interface. As far as I recall, this is an optional interface within the 3GPP
architecture. In fact,
the SGSN at that point is not just a SGSN anymore, but 3GPP calls it a S4-SGSN. We did
not mention
that term anywhere on osmocom.org in the context of osmo-sgsn, as osmo-sgsn is a classic
SGSN (for 2G and 3G), and not a S4-SGSN.
To this day, the only integration between open5gs and Osmocom CNI is the SGs interface for
both CSFB as well
as SMS-over-SGs. The Gn interface is used for mobility between GERAN/UTRAN (osmo-sgsn)
and EUTRAN/EPC (PGW).
We'd be very happy to see anyone contributing code or funding of extending osmo-sgsn
from a SGSN to a
S4-SGSN.
Kind regards,
Harald
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- Harald Welte <laforge(a)osmocom.org> https://laforge.gnumonks.org/
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