[srsran-users] ul_freq is wrong when dl_arfcn is less than 153620 in band n28
Bouras Abdennour
bourascom.dz at gmail.com
Tue Feb 20 21:33:38 UTC 2024
Have you succeeded in getting the COTS UE attached with the gnb using n28
arfcn = 153620 ?
What COTS UE are you using?
On Tue, Feb 20, 2024 at 1:01 PM <srsran-users-request at lists.srsran.com>
wrote:
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> 1. ul_freq is wrong when dl_arfcn is less than 153620 in band
> n28 (sindi at innovatechtelecom.com)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Mon, 19 Feb 2024 16:40:17 -0300
> From: <sindi at innovatechtelecom.com>
> To: <srsran-users at lists.srsran.com>
> Subject: [srsran-users] ul_freq is wrong when dl_arfcn is less than
> 153620 in band n28
> Message-ID: <000101da636b$7e046a40$7a0d3ec0$@innovatechtelecom.com>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hi,
>
>
>
> I?ve been testing gNB in band n28 with COTS UE for 5MHz channel bandwidth
> using Open5GS. The gNB works fine unless when the dl_arfcn is less than
> 152620. For instance, when dl_arfcn = 153600, it results that the dl_freq <
> ul_freq. Below are the outputs for dl_arfcn=153620 and dl_arfcn=153600.
> Also, there is the gNB configuration for dl_arfcn = 153600 that results in
> dl_freq < ul_freq. Regards, Sindi
>
>
>
>
>
> --== srsRAN gNB (commit a09b0008e) ==--
>
>
>
> Connecting to AMF on 127.0.0.5:38412
>
> Available radio types: uhd.
>
> [INFO] [UHD] linux; GNU C++ version 11.4.0; Boost_107400;
> UHD_4.6.0.0-0ubuntu1~jammy1
>
> [INFO] [LOGGING] Fastpath logging disabled at runtime.
>
> Making USRP object with args
> 'type=b200,num_recv_frames=64,num_send_frames=64'
>
> [INFO] [B200] Detected Device: B200mini
>
> [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] Setting master clock rate selection to 'automatic'.
>
> [INFO] [B200] Asking for clock rate 16.000000 MHz...
>
> [INFO] [B200] Actually got clock rate 16.000000 MHz.
>
> [INFO] [MULTI_USRP] Setting master clock rate selection to 'manual'.
>
> [INFO] [B200] Asking for clock rate 23.040000 MHz...
>
> [INFO] [B200] Actually got clock rate 23.040000 MHz.
>
> Cell pci=1, bw=5 MHz, dl_arfcn=153620 (n28), dl_freq=768.1 MHz,
> dl_ssb_arfcn=153650, ul_freq=713.1 MHz
>
>
>
> ==== gNodeB started ===
>
> Type <t> to view trace
>
>
>
>
>
> --== srsRAN gNB (commit a09b0008e) ==--
>
>
>
> Connecting to AMF on 127.0.0.5:38412
>
> Available radio types: uhd.
>
> [INFO] [UHD] linux; GNU C++ version 11.4.0; Boost_107400;
> UHD_4.6.0.0-0ubuntu1~jammy1
>
> [INFO] [LOGGING] Fastpath logging disabled at runtime.
>
> Making USRP object with args
> 'type=b200,num_recv_frames=64,num_send_frames=64'
>
> [INFO] [B200] Detected Device: B200mini
>
> [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] Setting master clock rate selection to 'automatic'.
>
> [INFO] [B200] Asking for clock rate 16.000000 MHz...
>
> [INFO] [B200] Actually got clock rate 16.000000 MHz.
>
> [INFO] [MULTI_USRP] Setting master clock rate selection to 'manual'.
>
> [INFO] [B200] Asking for clock rate 23.040000 MHz...
>
> [INFO] [B200] Actually got clock rate 23.040000 MHz.
>
> Cell pci=1, bw=5 MHz, dl_arfcn=153600 (n28), dl_freq=768.0 MHz,
> dl_ssb_arfcn=153630, ul_freq=798.0 MHz
>
>
>
> ==== gNodeB started ===
>
> Type <t> to view trace
>
>
>
>
>
> Configuration:
>
>
>
> amf:
>
> addr: 127.0.0.5 # 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: type=b200,num_recv_frames=64,num_send_frames=64 #
> Optionally
> pass arguments to the selected RF driver.
>
> clock: external # Specify
> the clock source used by the RF.
>
> sync: # Specify
> the sync source used by the RF.
>
> srate: 23.04 # RF sample
> rate might need to be adjusted according to selected bandwidth.
>
> otw_format: sc12
>
> tx_gain: 85 # Transmit
> gain of the RF might need to adjusted to the given situation.
>
> rx_gain: 60 # Receive
> gain of the RF might need to adjusted to the given situation.
>
>
>
> cell_cfg:
>
> dl_arfcn: 153600 # ARFCN of
> the downlink carrier (center frequency).
>
> band: 28 # The NR
> band.
>
> channel_bandwidth_MHz: 5 # Bandwith
> in MHz. Number of PRBs will be automatically derived.
>
> common_scs: 15 #
> Subcarrier
> spacing in kHz used for data.
>
> plmn: "99970" # PLMN
> broadcasted by the gNB.
>
> tac: 1 # Tracking
> area code (needs to match the core configuration).
>
> pci: 1 # Physical
> cell ID.
>
>
>
> 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.
>
>
>
>
>
>
>
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