[srsran-users] Hand-Over: S1

[mueller_srs at baseband.digital]

Hi List,

from [1] I've learned that there's both Intra-eNB and S1 handover supported by srsRAN; I 
might be a bit new to the whole 3GPP nomenclature, so I hope I'm not messing up the 
following questions:

- Intra-eNB handover happens without srsEPC noticing it; is that right?
   - How does the split between srsENB and srsEPC map to the CU / DU split in 5g?

- S1 handover is documented to be unsupported the srsEPC, but supported through replacing 
that with Open5GS.
   - What's the intrinsic reason for that? Software complexity? Lack of contributor to 
implement that?
   - Supporting other EPCs does sound pretty involved; how well has that proven to work 
over the air?

- I'm mostly interested in improving the abilities of UEs and the infrastructure to 
predict good points in time to initiate handovers, so a first step would be observing the 
messages exchanged between EPC and xNB.
   - What kind of visibility of channel conditions do I get there?
   - Are there sensible dissectors for wireshark or even better a good logging 
infrastructure that can be used for debugging & development?

Best regards,
Marcus M


[1] https://docs.srsran.com/projects/4g/en/latest/app_notes/source/handover/source/index.html