5G support in MBIM
bjorn at mork.no
Wed Sep 23 13:47:53 UTC 2020
"Hagstrom, Walter" <Walter.Hagstrom at digi.com> writes:
> I have an EM9190 Sierra Wireless 5G modem, this modem only supports
> MBIM and not QMI; when I make a 5G connection (I can see via !gstatus
> the modem is connected on 5G), MBIM does not advertise any 5G
> capabilities nor does it show the access technology is 5G. I was
> wondering if there was any support for 5G in MBIM and if anyone was
> working on it.
> # mbimcli -d /dev/cdc-wdm0 --query-device-caps
> [/dev/cdc-wdm0] Device capabilities retrieved:
> Device type: 'embedded'
> Cellular class: 'gsm'
> Voice class: 'no-voice'
> SIM class: 'removable'
> Data class: 'umts, hsdpa, hsupa, lte'
> SMS caps: 'pdu-receive, pdu-send'
> Ctrl caps: 'reg-manual'
> Max sessions: '15'
> Custom data class: 'unknown'
> Device ID: '351735110101165'
> Firmware info: '01.04.01.01_Generi_013.001_000'
> Hardware info: 'EM9190'
> # mmcli -m "$INDEX" --command=!gstatus?
> response: '!GSTATUS:
> Current Time: 54245 Temperature: 33
> Modem Mitigate Level: 0 ModemProc Mitigate Level: 0
> Reset Counter: 1 Mode: ONLINE
> System mode: ENDC PS state: Attached
> LTE band: B3 LTE bw: 10 MHz
> LTE Rx chan: 1575 LTE Tx chan: 19575
> EMM state: Registered Normal Service
> RRC state: RRC Connected
> IMS reg state: NOT REGISTERED IMS mode: Normal
> IMS Srv State: NO SMS,NO VoIP
> PCC RxM RSSI: -51 PCC RxM RSRP: -69
> PCC RxD RSSI: --- PCC RxD RSRP: ---
> Tx Power: -44 TAC: 0001 (1)
> RSRQ (dB): -6.5 Cell ID: 01a2d001 (27447297)
> SINR (dB): 30.0
> NR5G band: n41 NR5G bw: 100 MHz
> NR5G Rx chan: 518598 NR5G Tx chan: 518598
> NR5G RSRP (dBm): -74 NR5G RSRQ (dB): -11
> NR5G SINR (dB): --- '
See the recent thread at
and the documentation I pointed to:
IIUC, libmbim (and MM) must advertise MBIMEx 2.0 support to the device
to get access to all the 5G stuff.
Someone with a 5G modem should probably implement that. Hint, hint :-)
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