[srsran-users] srsran 22.04 - 5G SA on UHD B210 hardware

[Andre Puschmann]

Hey Bas,

please share eNB/UE logs in info mode please.

Thanks
Andre



On 23/5/22 14:52, Vermeulen, Bas (Consultant) wrote:
> Hi,
> 
> I have multiple i9 12900K machines and two USRP B210's at the moment.
> 
> My starting point is the 5G SA end-to-end ZeroMQ setup, and after some 
> hickups with the wrong IMSI in the user database, everything is working 
> as expected. The UE gets a connection, and I get a bandwidth of 10 Mbps 
> with iperf3 over the RF (zeromq) interface.
> 
> After this, I moved the UE to a different machine, with the ZeroMQ bound 
> to the ethernet interface instead. This also works, and I get the same 
> 10-11 Mbps I get when running on one machine (I modified enb.conf and 
> ue.conf to bind to the ethernet ip addresses of the ue and enb/epc machine).
> 
> My final step is to connect a B210 to each machine, and cross connect 
> the RX/TX of both B210's (with a 30 dB attenuation on the line).
> I've used the zeromq end-to-end configurations as a base, and modified 
> them to switch to use the B210's. I've taken the settings from the UE SA 
> setup with Amarisoft app note into account (mostly set the sampling rate 
> etc). If the tx_gain is too high, I get problems with the communication. 
> It's currently set to 1, and that doesn't give me any 
> underruns/overruns/late packets.
> 
> This setup gets me to the point where I see the following on the UE side:
> 
> Inactive RF plugins:
> Reading configuration file ue-uhd.conf...
> 
> Built in RelWithDebInfo mode using 22.04.0.
> 
> Opening 1 channels in RF device=UHD with 
> args=sampling_rate=23.04e6,lo_freq_offset_hz=23.04e6
> Supported RF device list: UHD soapy bladeRF zmq file
> [INFO] [UHD] linux; GNU C++ version 10.2.1 20201207; Boost_107400; 
> UHD_3.15.0.0-4+b1
> [INFO] [LOGGING] Fastpath logging disabled at runtime.
> Opening USRP channels=1, args: 
> lo_freq_offset_hz=23.04e6,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] Detecting internal GPSDO....
> [INFO] [GPS] Found an internal GPSDO: GPSTCXO , Firmware Rev 0.929a
> [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.
> Waiting PHY to initialize ... done!
> Attaching UE...
> Random Access Transmission: prach_occasion=0, preamble_index=0, 
> ra-rnti=0xf, tti=3051
> Random Access Complete.     c-rnti=0x4601, ta=1
> RRC Connected
> 
> Unfortunately, I am unable to continue with the connection after this.
> 
> Does anyone have an idea how to get this setup working? If needed I have 
> log files for both the UE and ENB side.
> 
> Regards,
> 
> Bas Vermeulen
> 
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-- 
Andre Puschmann

Software Radio Systems (SRS)
https://www.srs.io
andre at srs.io

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