Hi guys!
I am new here and needed some help. My name is Philipp and I am a student at
HTW Berlin in Germany.
We have built a small test network with srsLTE in our lab. The network consists
of a computer with a USRP N210 and a Virtual Access GW2028 as UE with a Pi. The
computer runs the eNodeB service of srsLTE with Open5GS as EPC. The network was
built by another student last semester. It was configured for band 3 at 1800
MHz. Now the network should run in band 31 at 450 MHz. Basically it runs as
well. The GW2028 successfully logs in. However, after a short time there is an
error with the USRB N210:
[ERROR] [UHD] An unexpected exception was caught in a task loop.The task loop
will now exit, things may not work.EnvironmentError: IOError: usb rx8 transfer
status: LIBUSB_TRANSFER_NO_DEVICE
/home/u1804/srsLTE_20_10/srsLTE/lib/src/phy/rf/rf_uhd_imp.cc.228: USRP reported
the following error: EnvironmentError: IOError: usb rx6 transfer status:
LIBUSB_TRANSFER_NO_DEVICE
After the appearance the command "uhd_find_devices" returns wrong answers. The
serial number is no longer returned completely or no device is found at all.
After a restart it runs again for a few minutes and then crashes again with the
error.
In band 3, everything was supposedly running relatively stable.
Unfortunately, due to Corona, I am not at the university in the lab every day,
but I plan to be there in the next few days.
If more information is needed, I will submit it when I am on site. Currently
running a version of Ubuntu 18 as operating system. UHD is installed in version
3.15.
Has anyone had this problem before, or could kindly help me?
Greetings Philipp
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