5G Signal properties

[Hagstrom, Walter]

Hello,

Are the 5G signal properties (rsrp, rsrq and sinr) going to be added to the ModemManager Signal interface?  I see no way of reading 5G signal information, is there a plan to add this into ModemManager, from what I see there is also no way of getting 5G signal info via libqmi.

Below is a Quectel 5G modem connected to T-Mobile's 5G network, in 5G NSA mode the 5G signal is only active while transferring data , so you can only read the 5G signal info when transferring data which I can read via an AT command.

# mmcli -m 0
  -----------------------------------
  General  |               dbus path: /org/freedesktop/ModemManager1/Modem/0
           |               device id: a3e908bd7918e22d8142e72f50494268fee117ed
  -----------------------------------
  Hardware |            manufacturer: QUALCOMM INCORPORATED
           |                   model: RM500QGL_VF
           |       firmware revision: RM500QGLAAR01A01M4G_BETA_20200517F
           |          carrier config: Commercial-TMO
           | carrier config revision: 0A01050F
           |            h/w revision: 20000
           |               supported: gsm-umts, lte, 5gnr
           |                 current: gsm-umts, lte, 5gnr
           |            equipment id: 869710030002905
  -----------------------------------
  System   |                  device: /sys/devices/pci0000:00/0000:00:1c.2/0000:03:00.0/usb4/4-1
           |                 drivers: option1, qmi_wwan
           |                  plugin: quectel
           |            primary port: cdc-wdm0
           |                   ports: wwan0 (unknown), ttyUSB0 (qcdm), wwan0.1 (net),
           |                          wwan0.2 (net), wwan0.3 (net), wwan0.4 (net), ttyUSB2 (at), cdc-wdm0 (qmi),
           |                          ttyUSB1 (gps), ttyUSB3 (at)
  -----------------------------------
  Numbers  |                     own: 16128142764
  -----------------------------------
  Status   |                    lock: sim-pin2
           |          unlock retries: sim-pin (3), sim-pin2 (10), sim-puk (10), sim-puk2 (10)
           |                   state: registered
           |             power state: on
           |             access tech: lte
           |          signal quality: 52% (recent)
  -----------------------------------
  Modes    |               supported: allowed: 3g; preferred: none
           |                          allowed: 4g; preferred: none
           |                          allowed: 3g, 4g; preferred: 4g
           |                          allowed: 3g, 4g; preferred: 3g
           |                          allowed: 5g; preferred: none
           |                          allowed: 3g, 5g; preferred: 5g
           |                          allowed: 3g, 5g; preferred: 3g
           |                          allowed: 4g, 5g; preferred: 5g
           |                          allowed: 4g, 5g; preferred: 4g
           |                          allowed: 3g, 4g, 5g; preferred: 5g
           |                          allowed: 3g, 4g, 5g; preferred: 4g
           |                          allowed: 3g, 4g, 5g; preferred: 3g
           |                 current: allowed: 2g, 3g, 4g, 5g; preferred: 5g
  -----------------------------------
  Bands    |               supported: utran-1, utran-3, utran-4, utran-6, utran-5, utran-8,
           |                          utran-2, eutran-1, eutran-2, eutran-3, eutran-4, eutran-5, eutran-7,
           |                          eutran-8, eutran-12, eutran-13, eutran-14, eutran-17, eutran-18,
           |                          eutran-19, eutran-20, eutran-25, eutran-26, eutran-28, eutran-29,
           |                          eutran-30, eutran-32, eutran-34, eutran-38, eutran-39, eutran-40,
           |                          eutran-41, eutran-42, eutran-46, eutran-48, eutran-66, eutran-71,
           |                          utran-19
           |                 current: utran-1, utran-3, utran-4, utran-6, utran-5, utran-8,
           |                          utran-2, eutran-1, eutran-2, eutran-3, eutran-4, eutran-5, eutran-7,
           |                          eutran-8, eutran-12, eutran-13, eutran-14, eutran-17, eutran-18,
           |                          eutran-19, eutran-20, eutran-25, eutran-26, eutran-28, eutran-29,
           |                          eutran-30, eutran-32, eutran-34, eutran-38, eutran-39, eutran-40,
           |                          eutran-41, eutran-42, eutran-46, eutran-48, eutran-66, eutran-71,
           |                          utran-19
  -----------------------------------
  IP       |               supported: ipv4, ipv6, ipv4v6
  -----------------------------------
  3GPP     |                    imei: 869710030002905
           |             operator id: 310260
           |           operator name: T-Mobile
           |            registration: home
  -----------------------------------
  3GPP EPS |    ue mode of operation: csps-1
  -----------------------------------
  SIM      |               dbus path: /org/freedesktop/ModemManager1/SIM/0
  -----------------------------------
  Bearer   |               dbus path: /org/freedesktop/ModemManager1/Bearer/0
# mmcli -m "$INDEX" --signal-get
  ----------------------
  Signal | refresh rate: 30 seconds
  ----------------------
  LTE    |         rssi: -80.00 dBm
         |         rsrq: -15.00 dB
         |         rsrp: -113.00 dBm
         |          s/n: 5.20 dB

Thanks,

Walter.

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