Hello everyone,
we are using an EM9191 for our application and currently evaluating performance. With LTE only (B7 band), we reach download speeds up to 140 Mbps DL/50 Mbps UL, but as soon as 5G NSA (EN-DC, n78 band) comes in, the max I ever got was 100 Mbps DL, but upload is much faster (also around 100 Mbps). Also, we notice that instead of falling back to LTE only when going back into a room w/o 5G, it will keep 5G on with terrible RX power (NR5G RSRP (dBm): -122). How is that?
- FW version of EM9191: 03.09.11.00
- Router: 8devices Habanero running OpenWrt 22.03.4 r20123-38ccc47687
- EM9191 connected using USB 3, cdc_mbim driver on modem manager
Do you think it is a router-interface issue, or EM9191 FW issue, a configuration issue, a provider issue (provider-side limitation) or is it supposed to be like this? I have attached the mmcli and at!gstatus report below as reference. Any help would be greatly appreciated.
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General | path: /org/freedesktop/ModemManager1/Modem/0
| device id: XXXXX
----------------------------------
Hardware | manufacturer: Sierra Wireless, Incorporated
| model: Sierra Wireless EM9191
| firmware revision: 03.09.11.00_GENERIC
| carrier config: default
| h/w revision: EM9191
| supported: gsm-umts, lte, 5gnr
| current: gsm-umts, lte, 5gnr
| equipment id: 355890347230810
----------------------------------
System | device: /sys/devices/platform/soc/8af8800.usb3/8a00000.dwc3/xhci-hcd.0.auto/usb2/2-1
| drivers: cdc_mbim, option1
| plugin: sierra
| primary port: cdc-wdm0
| ports: cdc-wdm0 (mbim), wwan0 (net)
----------------------------------
Status | unlock retries: sim-pin2 (3)
| state: connected
| power state: on
| access tech: lte
| signal quality: 74% (cached)
----------------------------------
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: 4g, 5g; preferred: 5g
| allowed: 4g, 5g; preferred: 4g
| allowed: 3g, 5g; preferred: 5g
| allowed: 3g, 5g; preferred: 3g
| allowed: 3g, 4g, 5g; preferred: 5g
| allowed: 3g, 4g, 5g; preferred: 4g
| allowed: 3g, 4g, 5g; preferred: 3g
| current: allowed: 3g, 4g, 5g; preferred: 5g
----------------------------------
Bands | supported: utran-1, utran-3, utran-4, utran-6, utran-5, utran-8,
| utran-9, 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-43, eutran-46, eutran-48,
| eutran-66, eutran-71, utran-19
| current: utran-1, utran-3, utran-4, utran-6, utran-5, utran-8,
| utran-9, 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-43, eutran-46, eutran-48,
| eutran-66, eutran-71, utran-19
----------------------------------
IP | supported: ipv4, ipv6, ipv4v6
----------------------------------
3GPP | imei: XXXXX
| enabled locks: fixed-dialing
| operator id: XXXXX
| operator name: XXXXX
| registration: home
----------------------------------
3GPP EPS | initial bearer path: /org/freedesktop/ModemManager1/Bearer/0
| initial bearer ip type: ipv4v6
----------------------------------
SIM | primary sim path: /org/freedesktop/ModemManager1/SIM/0
----------------------------------
Bearer | paths: /org/freedesktop/ModemManager1/Bearer/1
Current Time: 1476 Temperature: 29
Thermal Mitigation Level: 0
Reset Counter: 1 Mode: ONLINE
System mode: ENDC PS state: Attached
LTE band: B3 LTE bw: 20 MHz
LTE Rx chan: 1850 LTE Tx chan: 19850
LTE SCC1 state:INACTIVE LTE SCC1 band: B7
LTE SCC1 bw : 20 MHz LTE SCC1 Rx chan: 2850
LTE SCC1 UL Configured: FALSE LTE SCC1 Tx chan: 0
LTE SCC2 state:INACTIVE LTE SCC2 band: B20
LTE SCC2 bw : 10 MHz LTE SCC2 Rx chan: 6200
LTE SCC2 UL Configured: FALSE LTE SCC2 Tx chan: 0
LTE SCC3 state:INACTIVE LTE SCC3 band: B1
LTE SCC3 bw : 10 MHz LTE SCC3 Rx chan: 54
LTE SCC3 UL Configured: FALSE LTE SCC3 Tx chan: 0
EMM state: Registered Normal Service
RRC state: RRC Connected
IMS reg state: REGISTERED IMS mode: Normal
IMS Srv State: FULL SMS,NO VoIP
PCC RxM RSSI: -41 PCC RxM RSRP: -77
PCC RxD RSSI: -39 PCC RxD RSRP: -72
PCC RxM1 RSSI: -89 PCC RxM1 RSRP: -126
PCC RxD1 RSSI: -88 PCC RxD1 RSRP: -125
SCC1 RxM RSSI: -57 SCC1 RxM RSRP: -77
SCC1 RxD RSSI: -53 SCC1 RxD RSRP: -74
SCC2 RxM RSSI: -46 SCC2 RxM RSRP: -69
SCC2 RxD RSSI: -42 SCC2 RxD RSRP: -64
SCC3 RxM RSSI: -54 SCC3 RxM RSRP: -75
SCC3 RxD RSSI: -56 SCC3 RxD RSRP: -77
SCC3 RxM1 RSSI: --- SCC3 RxM1 RSRP: ---
SCC3 RxD1 RSSI: --- SCC3 RxD1 RSRP: ---
PCC Tx Power: -27 TAC: 9c54 (40020)
SCC1 Tx Power: ---
SCC2 Tx Power: ---
SCC3 Tx Power: ---
RSRQ (dB): -12.6 Cell ID: 01390e00 (20516352)
SINR (dB): 2.4
SCC1 NR5G band: n78 SCC1 NR5G bw: 100 MHz
SCC1 NR5G Tx Power: -12 SCC1 NR5G Tx chan: 650000
SCC1 NR5G Rx chan: 650000
NR5G RSRP (dBm): -68 NR5G RSRQ (dB): -11
NR5G SINR (dB): 23.0
