[srsran-users] Unstable 5G SA Connection

[Shivraj Hanumant Gonde]

Hi all,

I am trying to establish a 5G SA connection between srsUE and Amarisoft
Callbox.
The connection is unstable and I see a lot of "Error filing tb" and
"Computing UL grant" prompts.

Setup Details:
Intel Core i7 CPU @ 3.50 GHz
8GB RAM
Ubuntu 20.04.1
srsRAN 22.04
UHD v4.2.0.0

UE output:
Active RF plugins: libsrsran_rf_uhd.so libsrsran_rf_zmq.so
Inactive RF plugins:
Reading configuration file /home/user/.config/srsran/ue.conf...

Built in Release mode using commit ce8a3cae1 on branch heads/release_22_04.

Opening 1 channels in RF device=default with args=default
Supported RF device list: UHD zmq file
Trying to open RF device 'UHD'
[INFO] [UHD] linux; GNU C++ version 9.4.0; Boost_107100;
UHD_4.3.0.heads-v4.2.0.0-14-g1e718d9b
[INFO] [LOGGING] Fastpath logging disabled at runtime.
Opening USRP channels=1, args: type=b200,master_clock_rate=23.04e6
[INFO] [UHD RF] RF UHD Generic instance constructed
[INFO] [B200] Detected Device: B210
[INFO] [B200] Operating over USB 3.
[INFO] [B200] Initialize CODEC control...
[INFO] [B200] Initialize Radio control...
[INFO] [B200] Performing register loopback test...
[INFO] [B200] Register loopback test passed
[INFO] [B200] Performing register loopback test...
[INFO] [B200] Register loopback test passed
[INFO] [B200] Asking for clock rate 23.040000 MHz...
[INFO] [B200] Actually got clock rate 23.040000 MHz.
RF device 'UHD' successfully opened
Waiting PHY to initialize ... done!
Attaching UE...
Random Access Transmission: prach_occasion=0, preamble_index=0,
ra-rnti=0xf, tti=8331
Random Access Complete.     c-rnti=0x4604, ta=3
RRC Connected
RRC NR reconfiguration successful.
PDU Session Establishment successful. IP: 192.168.2.2
RRC NR reconfiguration successful.
/home/user/lte/srsRAN/lib/src/phy/phch/ra_nr.c:937: Error filing tb
/home/user/lte/srsRAN/srsue/hdr/phy/nr/state.h:123: Computing UL grant
/home/user/lte/srsRAN/lib/src/phy/phch/ra_nr.c:937: Error filing tb
/home/user/lte/srsRAN/srsue/hdr/phy/nr/state.h:123: Computing UL grant
/home/user/lte/srsRAN/lib/src/phy/phch/ra_nr.c:937: Error filing tb
/home/user/lte/srsRAN/srsue/hdr/phy/nr/state.h:123: Computing UL grant
/home/user/lte/srsRAN/lib/src/phy/phch/ra_nr.c:937: Error filing tb
/home/user/lte/srsRAN/srsue/hdr/phy/nr/state.h:123: Computing UL grant
/home/user/lte/srsRAN/lib/src/phy/phch/ra_nr.c:937: Error filing tb
/home/user/lte/srsRAN/srsue/hdr/phy/nr/state.h:123: Computing UL grant
/home/user/lte/srsRAN/lib/src/phy/phch/ra_nr.c:937: Error filing tb
/home/user/lte/srsRAN/srsue/hdr/phy/nr/state.h:123: Computing UL grant
/home/user/lte/srsRAN/lib/src/phy/phch/ra_nr.c:937: Error filing tb
/home/user/lte/srsRAN/srsue/hdr/phy/nr/state.h:123: Computing UL grant

Any inputs regarding this issue are appreciated.
Thank you for your help.

Best regards,
Shivraj
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