Problems running srsenb and srsue with USRP X410

[zhou-leo]

I've been trying to get srsenb and srsue running with my USRP X410, but I'm hitting some roadblocks. First off, I can't seem to get srsenb and srsue running properly. On top of that, my mobile device can't seem to find the base station. Oddly, only the RX light on the X410 is on - the TX/RX lights are off.
I've been using the default enb.conf and epc.conf files, and I've got srsenb and srsepc running on the same machine.
I've attached terminal output logs, and I'm seeing a bunch of warnings - something about odd decimation, issues with RX and TX rates, and trouble waiting for EOB.

$ sudo srsenb ./enb.conf
Active RF plugins: libsrsran_rf_uhd.so
Inactive RF plugins: 
---  Software Radio Systems LTE eNodeB  ---

Reading configuration file ./enb.conf...
WARNING: cpu0 scaling governor is not set to performance mode. Realtime processing could be compromised. Consider setting it to performance mode before running the application.

Built in Release mode using commit fa56836b1 on branch master.

Opening 1 channels in RF device=default with args=default
Supported RF device list: UHD file
Trying to open RF device 'UHD'
[INFO] [UHD] linux; GNU C++ version 9.4.0; Boost_107100; UHD_4.4.0.HEAD-0-g5fac246b
[INFO] [LOGGING] Fastpath logging disabled at runtime.
Opening USRP channels=1, args: 
[INFO] [UHD RF] RF UHD Generic instance constructed
[INFO] [MPMD] Initializing 1 device(s) in parallel with args: mgmt_addr=192.168.10.2,type=x4xx,product=x410,serial=324062A,name=ni-x4xx-324062A,fpga=X4_200,claimed=False,addr=192.168.10.2
[INFO] [MPM.PeriphManager] init() called with device args `fpga=X4_200,mgmt_addr=192.168.10.2,name=ni-x4xx-324062A,product=x410,clock_source=internal,time_source=internal'.
RF device 'UHD' successfully opened

==== eNodeB started ===
Type <t> to view trace
[WARNING] [0/DDC#0] The requested decimation is odd; the user should expect passband CIC rolloff.
Select an even decimation to ensure that a halfband filter is enabled.
Decimations factorable by 4 will enable 2 halfbands, those factorable by 8 will enable 3 halfbands.
decimation = dsp_rate/samp_rate -> 21
[WARNING] [0/DDC#0] The requested decimation is odd; the user should expect passband CIC rolloff.
Select an even decimation to ensure that a halfband filter is enabled.
Decimations factorable by 4 will enable 2 halfbands, those factorable by 8 will enable 3 halfbands.
decimation = dsp_rate/samp_rate -> 21
[WARNING] [MULTI_USRP] Could not set RX rate to 11.520 MHz. Actual rate is 11.703 MHz
[WARNING] [0/DDC#0] The requested decimation is odd; the user should expect passband CIC rolloff.
Select an even decimation to ensure that a halfband filter is enabled.
Decimations factorable by 4 will enable 2 halfbands, those factorable by 8 will enable 3 halfbands.
decimation = dsp_rate/samp_rate -> 21
[WARNING] [0/DDC#0] The requested decimation is odd; the user should expect passband CIC rolloff.
Select an even decimation to ensure that a halfband filter is enabled.
Decimations factorable by 4 will enable 2 halfbands, those factorable by 8 will enable 3 halfbands.
decimation = dsp_rate/samp_rate -> 21
[WARNING] [MULTI_USRP] Could not set RX rate to 11.520 MHz. Actual rate is 11.703 MHz
[WARNING] [0/DDC#1] The requested decimation is odd; the user should expect passband CIC rolloff.
Select an even decimation to ensure that a halfband filter is enabled.
Decimations factorable by 4 will enable 2 halfbands, those factorable by 8 will enable 3 halfbands.
decimation = dsp_rate/samp_rate -> 21
[WARNING] [0/DDC#1] The requested decimation is odd; the user should expect passband CIC rolloff.
Select an even decimation to ensure that a halfband filter is enabled.
Decimations factorable by 4 will enable 2 halfbands, those factorable by 8 will enable 3 halfbands.
decimation = dsp_rate/samp_rate -> 21
[WARNING] [MULTI_USRP] Could not set RX rate to 11.520 MHz. Actual rate is 11.703 MHz
[WARNING] [0/DDC#1] The requested decimation is odd; the user should expect passband CIC rolloff.
Select an even decimation to ensure that a halfband filter is enabled.
Decimations factorable by 4 will enable 2 halfbands, those factorable by 8 will enable 3 halfbands.
decimation = dsp_rate/samp_rate -> 21
[WARNING] [0/DDC#1] The requested decimation is odd; the user should expect passband CIC rolloff.
Select an even decimation to ensure that a halfband filter is enabled.
Decimations factorable by 4 will enable 2 halfbands, those factorable by 8 will enable 3 halfbands.
decimation = dsp_rate/samp_rate -> 21
[WARNING] [MULTI_USRP] Could not set RX rate to 11.520 MHz. Actual rate is 11.703 MHz
[WARNING] [0/DUC#0] The requested interpolation is odd; the user should expect passband CIC rolloff.
Select an even interpolation to ensure that a halfband filter is enabled.

[WARNING] [MULTI_USRP] Could not set TX rate to 11.520 MHz. Actual rate is 11.703 MHz
[WARNING] [0/DUC#0] The requested interpolation is odd; the user should expect passband CIC rolloff.
Select an even interpolation to ensure that a halfband filter is enabled.

[WARNING] [MULTI_USRP] Could not set TX rate to 11.520 MHz. Actual rate is 11.703 MHz
[WARNING] [0/DUC#1] The requested interpolation is odd; the user should expect passband CIC rolloff.
Select an even interpolation to ensure that a halfband filter is enabled.

[WARNING] [MULTI_USRP] Could not set TX rate to 11.520 MHz. Actual rate is 11.703 MHz
[WARNING] [0/DUC#1] The requested interpolation is odd; the user should expect passband CIC rolloff.
Select an even interpolation to ensure that a halfband filter is enabled.

[WARNING] [MULTI_USRP] Could not set TX rate to 11.520 MHz. Actual rate is 11.703 MHz
Setting frequency: DL=2680.0 Mhz, UL=2560.0 MHz for cc_idx=0 nof_prb=50
[INFO] [UHD RF] Tx while waiting for EOB, timed out... 28.7045 >= 2.92325. Starting new burst...
[INFO] [UHD RF] Tx while waiting for EOB, timed out... 86.5584 >= 30.9273. Starting new burst...
[INFO] [UHD RF] Tx while waiting for EOB, timed out... 114.308 >= 88.6443. Starting new burst...
[INFO] [UHD RF] Tx while waiting for EOB, timed out... 131.245 >= 116.543. Starting new burst...
[INFO] [UHD RF] Tx while waiting for EOB, timed out... 146.557 >= 133.446. Starting new burst...
[INFO] [UHD RF] Tx while waiting for EOB, timed out... 227.519 >= 148.653. Starting new burst...
[INFO] [UHD RF] Tx while waiting for EOB, timed out... 234.314 >= 229.759. Starting new burst...
[INFO] [UHD RF] Tx while waiting for EOB, timed out... 294.317 >= 236.559. Starting new burst...
[INFO] [UHD RF] Tx while waiting for EOB, timed out... 375.74 >= 296.567. Starting new burst...
[INFO] [UHD RF] Tx while waiting for EOB, timed out... 436.871 >= 377.78. Starting new burst...
[INFO] [UHD RF] Tx while waiting for EOB, timed out... 498.372 >= 438.888. Starting new burst...
[INFO] [UHD RF] Tx while waiting for EOB, timed out... 620.067 >= 500.59. Starting new burst...
^CStopping ..
Couldn't stop after 5s. Forcing exit.

For srsue, I can't even open the RF frontend device. I keep getting this error: "Failed to open a RF frontend device. Please check the available srsRAN CMAKE options to verify what RF frontend devices have been detected in your system".

$ uhd_find_devices 
[INFO] [UHD] linux; GNU C++ version 9.4.0; Boost_107100; UHD_4.4.0.HEAD-0-g5fac246b
--------------------------------------------------
-- UHD Device 0
--------------------------------------------------
Device Address:
    serial: 323F761
    addr: 192.168.10.2
    claimed: False
    fpga: X4_200
    mgmt_addr: 192.168.10.2
    name: ni-x4xx-323F761
    product: x410
    type: x4xx


oai@oai:~/srsRAN_4G/srsue$ sudo srsue ./ue.conf

Skipping RF plugin libsrsran_rf_uhd.so: /usr/local/lib/libsrsran_rf_uhd.so: undefined symbol: _ZN3uhd4_log3logC1ENS_3log14severity_levelERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEjSB_NSt6thread2idE
Active RF plugins:
Inactive RF plugins: libsrsran_rf_uhd.so 
Reading configuration file ./ue.conf...
WARNING: cpu0 scaling governor is not set to performance mode. Realtime processing could be compromised. Consider setting it to performance mode before running the application.

Built in Release mode using commit fa56836b1 on branch master.

Opening 1 channels in RF device=default with args=default
Supported RF device list: <none>
/home/oai/srsRAN_4G/lib/src/phy/rf/rf_imp.c:149: Failed to open a RF frontend device. Please check the available srsRAN CMAKE options to verify what RF frontend devices have been detected in your system
Error initializing radio.

EPC doesn't look like a problem.

Any thoughts on what might be going wrong or how to fix it? Any help would be super appreciated.

Thanks!

[zhuangyufan]

Hi! I encountered the same problem. Have you fixed it now?

[zhuangyufan]

The message "Could not set RX rate to 11.520 MHz. Actual rate is 11.703 MHz" occurs because srsLTE uses a non-standard sampling rate by default which is not supported by X410. Two steps to solve this problem:

1. Set "-DUSE_LTE_RATES=ON" when compiling srsLTE.
2. Set "expert.lte_sample_rates=true" in the configuration file.
   Hope it can help.

[Fr0zenForest]

Thanks a lot for your suggestion! I will try it later.

[Fr0zenForest]

Could you please share your environment configuration? Specifically, the system version, UHD version, and how you are connecting the X410 (QSFP or RJ45)? I am using UHD 4.7 on Ubuntu 22.04 with the correct X410 filesystem image and X4_200 FPGA image, but I keep getting errors about Control operation timed out waiting for ACK when trying to transmit and receive. I would like to reference your setup to see if it helps.

[zhuangyufan]

I use Ubuntu 20.04 and UHD 4.5 and connect X410 with a QSFP cable. Attached is the configuration file for eNB. Hope it helps.
enb_X410.txt

[Fr0zenForest]

谢谢兄弟，我估计就是带宽的问题，我用的是千兆网口，eNB会根据配置文件的prb数量来自动调整带宽，默认的prb是50，在降低带宽后成功跑通了，经测试benchmark最高能跑60e5（才6M？？？）不报错，我觉得还与路由器的转发能力有关，后续我买个光交换再来测试

[Fr0zenForest]

I got same problem, and I run example programs in /usr/local/lib/uhd/examples , TX and RX looks good with "rx_samples_to_file" and "tx_samples_from_file" which mean X410 hardware running normally. But when I run "benchmark_rate", lots of WARNGING come to my screen, then finished with:

Setting TX spp to 360
[00:00:04.412597038] Testing transmit rate 9.830400 Msps on 1 channels
UUUUOUUUUUSSSSSSOterminate called after throwing an instance of 'uhd::op_timeout'
  what():  RfnocError: OpTimeout: Control operation timed out waiting for ACK
Aborted (core dumped)

TX red LED lighted about 1s. RX green led blink 1s.

This problem is the same as the problem I encountered when running eNB. I guess this error occurs when TX and RX are running at the same time.

And sometimes I could also encounter " Tx while waiting for EOB , timed out..."