[srslte-users] ZeroMQ failure to connect.

[Reay, Robert]

I'm working with srsLTE for the first time and using the ZMQ RF device as a way to get familiar with it on a single machine.  It's not working as expected and I'm hoping someone can point me in the right direction.

I'm using a Ubuntu 18.04 in a VM.  I ran cmake with '-DENABLE_ZMQ_TEST=True'.  'make test' passes except for the 12 e2e tests that ENABLE_ZMQ_TEST adds, all of which fail.

Running the test in .../srsLTE/test fails:
$ sudo ./run_lte.sh ~/tmp/srsLTE/build 50 1 | tee test.log
Using 1 component carrier(s) in srsENB
Deleting existing log files for 50 PRB.
Starting srsEPC
srsEPC's PID is 11458
Starting srsENB
srsENB's PID is 11504
Starting srsUE
srsUE's PID is 11520
Waiting for tun_srsue to become available for 20s ..
Device "tun_srsue" does not exist.
tun_srsue didn't get up after 20s
[repeated]
Shutting down LTE network
Killing eNB

I see that the test creating 'ue1', there's no evidence that it creates the 'tun_srsue' inside ue1 that it is looking for.  Reading the logs it appears the UE attaches and then loses the connection. But honestly, I don't know enough yet to know if this snippet is correct behavior and I'm misinterpreting.  Logs attached.
Waiting PHY to initialize ... done!
Attaching UE...
Current sample rate is 1.92 MHz with a base rate of 23.04 MHz (x12 decimation)
Current sample rate is 1.92 MHz with a base rate of 23.04 MHz (x12 decimation)
.
Found Cell:  Mode=FDD, PCI=1, PRB=50, Ports=1, CFO=-0.2 KHz
Current sample rate is 11.52 MHz with a base rate of 23.04 MHz (x2 decimation)
Current sample rate is 11.52 MHz with a base rate of 23.04 MHz (x2 decimation)
Found PLMN:  Id=00101, TAC=7
Random Access Transmission: seq=31, ra-rnti=0x2
Random Access Complete.     c-rnti=0x46, ta=0
RRC Connected
Scheduling request failed: releasing RRC connection...

All of the e2e / ZMQ tests in .../srsLTE/build/test also fail. The logs look similar but aren't exactly the same.  In this case the UE doesn't appear to attach at all.
Waiting PHY to initialize ... done!
Attaching UE...
Stopping ..
Saving MAC PCAP file
Couldn't stop after 5s. Forcing exit.

Running through the instructions from the ZeroMQ app note gives very cd similar results to the run_lte script.

Any thoughts?

-rr

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