[srslte-users] zmq driver help

[Mirko Kovacevic]

Hi there, Dear srsLTE


I'm being delighted with latest release, especially with new feature Fake
RF with zmq.
Guys,
you done fantastic job,
planing to contribute my time to project.

After several days of code review and mailing list traversing, I tried
srsUE/srsENB with zmq driver installed on two separate VMs, each with 2x
CPU, and 2048 MB of RAM, host machine 16GB / 8 CPU.
I made regression tests on "make test zmq_driver" but test is not passing
all the time.
Maybe VMs are still not a desirable environment to execute  such kind of
realtime tasks or something still need to be done to VM to perform better.

Nevertheless,
UE managed to decode BCCH, read the cell, sent message on PRACH.
After that I only get Radio Link failures caused by tx time offset in
transmission.

I tried to play with options:
---------------
--rf.time_adv_nsamples=value
-------------------
Put base_rate to

base rate=1.92e6
------------

Changed
n_prb =6 (1.4Mhz bandwidth)
---------------

but no progress at all.


Do you have idea what else could be done when dealing with zmq driver ?
How to determine tx time offset when using zmq ?






-- 

*Puno pozdrava,Mirko Kovacevic*
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