[srslte-users] SrsLTE S1 handover issue

Chinedu Ezenobi chineduezenobi at gmail.com
Mon May 17 08:21:25 UTC 2021


Hello world,
My name is David, I am a masters student working on a project on srsLTE and
I am new on this mail list so please bear with me if I miss any formality.

I am trying to implement a S1 handover but I don't get as far as where I
have to force the handover. My 2 enodeBs successfully connect to the
open5gs core but when I try to run the flow graph generated by the handover
broker file from the GNU radio to connect the enode B to the UE, I get no
feed back response on either of my enodeB, EPC or UE which means that the
GNU radio does not connect my UE to the enodeB.

The terminal running the gnu radio gives the below output though:
/usr/lib/python3.6/importlib/_bootstrap.py:219: ImportWarning: can't
resolve package from __spec__ or __package__, falling back on __name__ and
__path__
  return f(*args, **kwds)
>>> Done

Generating: '/home/chinedu/Downloads/intra_enb.py'

Executing: /usr/bin/python3 -u /home/chinedu/Downloads/intra_enb.py

Warning: failed to XInitThreads()
/home/chinedu/.gnuradio/prefs/vmcircbuf_default_factory: No such file or
directory
vmcircbuf_createfilemapping: createfilemapping is not available

Here's a brief description of my setup
I am running my open5gs EPC on a VM on 10.0.0.7 network, the source enodeB,
UE and GNU radio are running on the same VM on 10.0.0.8 network and the
target enodeB on 10.0.0.9 all using the srsLTE release 20.10 and zmq based
radio frequency.
I followed the documentation to the best of my knowledge but I don't know
what I may be doing wrong.

Please can you help advise me on how I can get it to work.

Kind regards,
David.
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