Feature #2604
openGSUP-to-DIAMETER converter / IWF
50%
Description
In order to support a single subscriber database for 2G/3G and LTE, operators normally use a single HSS. HSS is the EPC successor of the LTE.
Instead of MAP over SS7, HSS's speak DIAMETER over SCTP or TCP (with optional TLS). The types of procedures / transactions are pretty much the same as before, but the encoding and the protocol changed completely.
There are a couple of (at least minimal) HSS implementations out there, from freeDiameter to nextepc, to name some examples.
If we were to implement a converter between GSUP and DIAMETER, then the OsmoMSC and OsmoSGSN could access an external HSS - and that same HSS could be accessed from nextepc or even openair-cn for LTE access.
3GPP TS 29.305 specifies the MAP-to-DIAMETeR InterWorkingFunction (IWF), which is pretty much the same device, with the exception that we'd use GSUP instead of MAP.
Files
Checklist
- cleanup commits and push to git.osmocom.org
- build testing using rebar on jenkins build slaves
- add unit tests
- ttcn3 test suite
- implenent auth-resync (AUTS) handling
- meaningful logging
Related issues
