N320 or N321 Series Config Files

[rolandmartinson7890]

Hello srsRAN users. Has anyone ever run on the N321 or N320 SDRs. I have B210s and they connect well without a problem but the N321 (with the configuration below) doesnt allow the UE to see the network:

amf:
addr: 127.0.1.5 # The address or hostname of the AMF.
bind_addr: 127.0.0.1 # A local IP that the gNB binds to for traffic from the AMF.

ru_sdr:
device_driver: uhd # The RF driver name.
device_args: addr=192.168.40.9,clock_source=internal,send_frame_size=8000,recv_frame_size=8000, master_clock_rate=245.76e6 # Optionally pass arguments to the selected RF driver.
clock: internal # Specify the clock source used by the RF.
sync: # Specify the sync source used by the RF.
srate: 61.44 #61.44 #122.88 # RF sample rate might need to be adjusted according to selected bandwidth.
tx_gain: 55 # Transmit gain of the RF might need to adjusted to the given situation.
rx_gain: 40 # Receive gain of the RF might need to adjusted to the given situation.
lo_offset: 25 #should be half the size of bandwidth
expert_cfg:
low_phy_thread_profile: quad

cell_cfg:
dl_arfcn: 628140 # ARFCN of the downlink carrier (center frequency).
band: 78 # The NR band.
channel_bandwidth_MHz: 20 #100 # Bandwith in MHz. Number of PRBs will be automatically derived. 20MHz for 23.04
common_scs: 30 # Subcarrier spacing in kHz used for data.
plmn: "00101" # PLMN broadcasted by the gNB.
tac: 1 # Tracking area code (needs to match the core configuration).
pci: 1 # Physical cell ID.
nof_antennas_dl: 2 #For configuring MIMO 2x2 - B210 only supports 2x2
nof_antennas_ul: 2 #For configuring MIMO 2x2
ssb:
ssb_period: 10
pdsch:
mcs_table: qam256
log:
filename: /tmp/iq.log
all_level: info
phy_rx_symbols_filename: /tmp/iq.log

pcap:
mac_enable: false # Set to true to enable MAC-layer PCAPs.
mac_filename: /tmp/gnb_mac.pcap # Path where the MAC PCAP is stored.
ngap_enable: false # Set to true to enable NGAP PCAPs.
ngap_filename: /tmp/gnb_ngap.pcap # Path where the NGAP PCAP is stored.

[pgawlowicz]

Could you add the following to the UE config and see whether it works with x310?

[expert]
lte_sample_rates = true

[rolandmartinson7890]

I am using the N321. I will however try that out when I get access to the devices again and let you know.

[pgawlowicz]

Hi @rolandmartinson7890, any progress with this issue?

[rolandmartinson7890]

I have been able to connect using N321 a while ago. I did not use this (lte_sample_rates = true).

It was however a one time instance and my B210s seem to have a much stable connection in comparison to the more powerful and expensive SDRs like N321 and X310.

I reverted back to the B210s for the rest of my experiments because I didnt wanna waste time configuring.

[pgawlowicz]

Thanks for your feedback!