[srsran-users] attaching srsue (bladerf 2.0 micro xA4) to commercial LTE

[alexander.serkin at gmail.com]

Using bladeRF and pcsc with sim card reader i'm trying to connect to
commercial LTE network. The process runs as follows:

 

# srsue

Active RF plugins: libsrsran_rf_blade.so libsrsran_rf_zmq.so

Inactive RF plugins:

Couldn't open , trying /root/.config/srsran/ue.conf

Couldn't open /root/.config/srsran/ue.conf either, trying
/etc/srsran/ue.conf

Reading configuration file /etc/srsran/ue.conf...

 

Built in Release mode using commit 921f17484 on branch master.

 

Opening 1 channels in RF device=default with args=default

Supported RF device list: bladeRF zmq file

Trying to open RF device 'bladeRF'

Opening bladeRF...

Set RX sampling rate 1.92 Mhz, filter BW: 1.92 Mhz

RF device 'bladeRF' successfully opened

Waiting PHY to initialize ... done!

Attaching UE...

Set RX sampling rate 1.92 Mhz, filter BW: 1.92 Mhz

set RX frequency to 2684999998

set TX frequency to 2564999998

.

Found Cell:  Mode=FDD, PCI=122, PRB=50, Ports=2, CP=Normal, CFO=3.0 KHz

Set RX sampling rate 11.52 Mhz, filter BW: 9.22 Mhz

 

And then hangs without visible activity. Ue.log in debug mode shows
repeating block of messages like this:

 

2023-05-16T17:41:39.369847 [NAS    ] [D] Attempting to select PLMN

2023-05-16T17:41:39.369849 [STCK   ] [D] tti_tprof: duration=0 msec

2023-05-16T17:41:39.370845 [PHY    ] [D] [    0] run_stack_tti: from recv

2023-05-16T17:41:39.370846 [PHY    ] [D] [    0] run_stack_tti: calling
stack tti=6, tti_jump=1

2023-05-16T17:41:39.370847 [PHY    ] [D] [    0] run_stack_tti: stack called

2023-05-16T17:41:39.370848 [PHY    ] [D] [    0] SYNC:  received 1920
samples from radio

2023-05-16T17:41:39.370850 [PHY    ] [D] [    0] SYNC:  state=IDLE, tti=7

2023-05-16T17:41:39.370851 [PHY    ] [D] [    0] Discarding 1920 samples

2023-05-16T17:41:39.370864 [MAC    ] [D] [    6] Running MAC tti=6

2023-05-16T17:41:39.370865 [MAC    ] [D] [    6] Update Bj: lcid=0, Bj=0

2023-05-16T17:41:39.370865 [MAC    ] [D] [    6] Update Bj: lcid=1, Bj=0

2023-05-16T17:41:39.370869 [MAC    ] [D] [    6] RA:    IDLE:
rar_window_start=-1, rar_window_length=-1

2023-05-16T17:41:39.370870 [MAC-NR ] [D] [    6] Running MAC tti=6

2023-05-16T17:41:39.370873 [MAC-NR ] [D] [    6] nof_lcids_with_data=0,
nof_lcgs_with_data=0, last_non_zero_lcg=-1 []

[]

 

I need a hint how I can troubleshoot the problem ?

 

Thank you,

Alex

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