[srsran-users] [srsUE] Problems connecting to srsENB/srsEPC with bladeRF

[Neher, Philipp Albert]

Hi All,
sorry for reposting, but after much more trying I'm still stuck on the same point, the srsUE won't connect to the eNB.
Since the last post I also tried with another commercial eNB and with a "normal (non-RT) Kernel", but with the same problem.
With the commercial eNB I got the benchmark tool to return "OK" after 500s. But no attach, and no Error-Messages in the EPC-Logs.

Has someone please an idea?

Thank you
Philipp

-
Dipl.-Ing. Philipp Neher
Wissenschaftlicher Mitarbeiter "Echtzeitkommunikation und Steuerungshardware"

Institut für Steuerungstechnik der Werkzeugmaschinen und Fertigungseinrichtungen (ISW)
Universität Stuttgart

Seidenstraße 36 / Zi. 4.025
70174 Stuttgart

Tel: +49 711 685-84499
E-Mail: philipp.neher at isw.uni-stuttgart.de
Web: http://www.isw.uni-stuttgart.de<http://www.isw.uni-stuttgart.de/>

Von: srsran-users <srsran-users-bounces at lists.srsran.com> Im Auftrag von Neher, Philipp Albert
Gesendet: Donnerstag, 1. Dezember 2022 16:41
An: srsran-users at lists.srsran.com
Betreff: [srsran-users] [srsUE] Problems connecting to srsENB/srsEPC with bladeRF

Hi,
I'm just starting out with srsran but for the last few days I'm stuck. I hope somebody can point me in the right direction:
I just can't get srsUE to connect to srsENB/srsEPC.
To my understanding it sees the cell but does not connect.

I tried the same config files with the zmq device and that does work so I think that the problem lies in the RF-part.

I start both srsenb and srsue with the -rf.device_name=bladeRF and -expert.lte_sample_rates=true options, since I read on the archived mailing list that that might help.

On the UE PC I used the the "benchmark_radio" and the "pdsch_ue" tool. The benchmark tool always returns "failed" after a 1000s run with " 2 gaps, 0 late timestamps, 2 overflows, 0 underflows" but pdsch_ue report pdsch_misses=0 and pdsch_BLER=0.

My setup:
2x PCs (i7-7700 16GB RAM) with Xubuntu 22 and 5.15 Kernel
2x BladeRF micro A9
Both BladeRF connected to each other (TX1 to RX1) using RF-cables and a 20dB attenuator
srsRAN compiled from source (git tag 22.10)

Logfiles and config-files are attached.

Has someone a hint?

Thank you
Philipp

-
Dipl.-Ing. Philipp Neher
Wissenschaftlicher Mitarbeiter "Echtzeitkommunikation und Steuerungshardware"

Institut für Steuerungstechnik der Werkzeugmaschinen und Fertigungseinrichtungen (ISW)
Universität Stuttgart

Seidenstraße 36 / Zi. 4.025
70174 Stuttgart

Tel: +49 711 685-84499
E-Mail: philipp.neher at isw.uni-stuttgart.de<mailto:philipp.neher at isw.uni-stuttgart.de>
Web: http://www.isw.uni-stuttgart.de<http://www.isw.uni-stuttgart.de/>

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