EM9191 ENDC Low performance

IoT Modules MC/EM Series
1

Hi ,
I would like to inquire about the EM9191 module I am using, which has a transmission speed of only below 100Mbps when connected.
Below is information related to the module. I mainly want to confirm why my SCCs are all inactive, even though I have followed the instructions in other topics to activate the transmission flow using iperf3 in the background, is still inactive?

I’m not sure if this is the reason for the traffic being only 100Mbps, but I haven’t found any other issues.

AT!ENTERCND="A710"

OK
ATI

Manufacturer: Sierra Wireless, Incorporated
Model: EM9191
Revision: SWIX55C_03.14.10.01 f439de jenkins 2024/01/29 09:58:15
IMEI: 355890347442605
IMEI SV: 26
FSN: 784085565501B1
 +GCAP: +CGSM
 
 
 OK
 At!impref?
 
 !IMPREF: 
  preferred fw version:    03.14.10.01
  preferred carrier name:  GENERIC
  preferred config name:   GENERIC_030.091_000
  preferred subpri index:  000
  current fw version:      03.14.10.01
  current carrier name:    GENERIC
  current config name:     GENERIC_030.091_000
  current subpri index:    000
 
 OK
 At!gstatus?
 
 !GSTATUS: 
 Current Time:  864Temperature: 36
 Thermal Mitigation Level: 0
 Reset Counter: 1Mode:        ONLINE         
 System mode:   ENDC        PS state:    Attached     
 LTE band:      B3     LTE bw:      20 MHz  
 LTE Rx chan:   1550LTE Tx chan: 19550
 LTE SCC1 state:INACTIVE    LTE SCC1 band: B7     
 LTE SCC1 bw  : 20 MHz  LTE SCC1 Rx chan: 3250
 LTE SCC1 UL Configured: FALSELTE SCC1 Tx chan: 0
 LTE SCC2 state:INACTIVE    LTE SCC2 band: B28    
 LTE SCC2 bw  : 20 MHz  LTE SCC2 Rx chan: 9310
 LTE SCC2 UL Configured: FALSELTE SCC2 Tx chan: 0
 EMM state:     Registered     Normal Service 
 RRC state:     RRC Connected  
 IMS reg state: NOT REGISTERED  IMS mode:    Normal       
 IMS Srv State: UNKNOWN SMS,UNKNOWN VoIP
 
 PCC Rx0 RSSI:  -42PCC Rx0 RSRP:  -74
 PCC Rx1 RSSI:  -42PCC Rx1 RSRP:  -73
 PCC Rx2 RSSI:  --- PCC Rx2 RSRP:  --- 
 PCC Rx3 RSSI:  --- PCC Rx3 RSRP:  --- 
 SCC1 Rx0 RSSI: -47SCC1 Rx0 RSRP: -83
 SCC1 Rx1 RSSI: -46SCC1 Rx1 RSRP: -80
 SCC1 Rx2 RSSI: -43SCC1 Rx2 RSRP: -80
 SCC1 Rx3 RSSI: -44SCC1 Rx3 RSRP: -79
 SCC2 Rx0 RSSI: -34SCC2 Rx0 RSRP: -73
 SCC2 Rx1 RSSI: -36SCC2 Rx1 RSRP: -73
 PCC Tx Power:  14TAC:         69fd (27133)
 SCC1 Tx Power: ---
 SCC2 Tx Power: ---
 RSRQ (dB):     -11.1Cell ID:     01adbd16 (28163350)
 SINR (dB):      3.4
 
 SCC1 NR5G band:       n78    SCC1 NR5G bw:         80 MHz    
 SCC1 NR5G Tx Power:   17SCC1 NR5G Tx chan:    625334
 SCC1 NR5G Rx chan:    625334
 NR5G RSRP (dBm): -71NR5G RSRQ (dB):  -12
 NR5G SINR (dB):   6.5
 
 
 OK
 At!sdpref?
 
 RATs : WCDMA,LTE,NR5G
 GWC  : B1,B2,B4,B5,B6,B8,B9,B19
 LTE  : B1,B2,B3,B4,B5,B7,B8,B12,B13,B14,B17,B18,B19,B20,B25,B26,B28,B29,B30,B32
1TDS  : 
 NRSA : n1,n2,n3,n5,n7,n8,n12,n20,n25,n28,n38,n40,n41,n48,n66,n71,n77,n78,n79
 NRNSA: n1,n2,n3,n5,n7,n8,n12,n20,n25,n28,n38,n40,n41,n48,n66,n71,n77,n78,n79
 
 OK
 At!band?
 
 Index, Name
 00, All bands,
 0 - GW:    100600000FC00000
 1 - LTE:   0000A7E2BB0F38DF 0000000000000042
 3 - NRNSA: 000081A0090808D7 0000000000007042
 4 - NRSA:  000081A0090808D7 0000000000007042
 
 OK
 At!selrat?
 
 !SELRAT: 00, Automatic
 
 
 OK
 AT!RATCA?
 
 !RATCA: 
 CA: 1
 ENDC: 1
 SA: 1
 
 
 OK
 AT!RFCID?
 
 !RFCID: 
 CMW_HWID: 1007
 CMW_BID : 0
 MMW_HWID: 0
 MMW_BID : 0
 
 OK
 AT!RFCMBNSCAN?
 
 
 1003_0_0.mbn:   SWIX55C_03.14.10.01 f439de jenkins 2024/01/29 09:58:15 rfctag: 
71004_0_0.mbn:   SWIX55C_03.14.10.01 f439de jenkins 2024/01/29 09:58:15 rfctag: 
61007_0_0.mbn:   SWIX55C_03.14.10.01 f439de jenkins 2024/01/29 09:58:15 rfctag: 
71008_0_0.mbn:   SWIX55C_03.14.10.01 f439de jenkins 2024/01/29 09:58:15 rfctag: 
71090_0_0.mbn:   SWIX55C_03.14.10.01 f439de jenkins 2024/01/29 09:58:15 rfctag: 
41091_0_0.mbn:   SWIX55C_03.14.10.01 f439de jenkins 2024/01/29 09:58:15 rfctag: 
61100_0_0.mbn:   SWIX55C_03.14.10.01 f439de jenkins 2024/01/29 09:58:15 rfctag: 
71101_0_0.mbn:   SWIX55C_03.14.10.01 f439de jenkins 2024/01/29 09:58:15 rfctag: 
81102_0_0.mbn:   SWIX55C_03.14.10.01 f439de jenkins 2024/01/29 09:58:15 rfctag: 
71103_0_0.mbn:   SWIX55C_03.14.10.01 f439de jenkins 2024/01/29 09:58:15 rfctag: 
71104_0_0.mbn:   SWIX55C_03.14.10.01 f439de jenkins 2024/01/29 09:58:15 rfctag: 
81105_0_0.mbn:   SWIX55C_03.14.10.01 f439de jenkins 2024/01/29 09:58:15 rfctag: 
71200_0_0.mbn:   SWIX55C_03.14.10.01 f439de jenkins 2024/01/29 09:58:15 rfctag: 
81201_0_0.mbn:   SWIX55C_03.14.10.01 f439de jenkins 2024/01/29 09:58:15 rfctag: 
81500_0.mbn:     SWIX55C_03.14.10.01 f439de jenkins 2024/01/29 09:58:15 rfctag: 
11501_0.mbn:     SWIX55C_03.14.10.01 f439de jenkins 2024/01/29 09:58:15 rfctag: 
11502_0.mbn:     SWIX55C_03.14.10.01 f439de jenkins 2024/01/29 09:58:15 rfctag: 
11503_0.mbn:     SWIX55C_03.14.10.01 f439de jenkins 2024/01/29 09:58:15 rfctag: 
21504_0.mbn:     SWIX55C_03.14.10.01 f439de jenkins 2024/01/29 09:58:15 rfctag: 
11505_0.mbn:     SWIX55C_03.14.10.01 f439de jenkins 2024/01/29 09:58:15 rfctag: 
31506_0.mbn:     SWIX55C_03.14.10.01 f439de jenkins 2024/01/29 09:58:15 rfctag: 
31507_0.mbn:     SWIX55C_03.14.10.01 f439de jenkins 2024/01/29 09:58:15 rfctag: 
31508_0.mbn:     SWIX55C_03.14.10.01 f439de jenkins 2024/01/29 09:58:15 rfctag: 
32000_0.mbn:     SWIX55C_03.14.10.01 f439de jenkins 2024/01/30 06:12:07 rfctag:0
32050_0.mbn:     SWIX55C_03.14.10.01 f439de jenkins 2024/01/30 06:12:07 rfctag:0
12051_0.mbn:     SWIX55C_03.14.10.01 f439de jenkins 2024/01/30 06:12:07 rfctag:0
12100_0.mbn:     SWIX55C_03.14.10.01 f439de jenkins 2024/01/30 06:12:07 rfctag:0
42101_0.mbn:     SWIX55C_03.14.10.01 f439de jenkins 2024/01/30 06:12:07 rfctag:0
22102_0.mbn:     SWIX55C_03.14.10.01 f439de jenkins 2024/01/30 06:12:07 rfctag:0
12103_0.mbn:     SWIX55C_03.14.10.01 f439de jenkins 2024/01/30 06:12:07 rfctag:0
12150_0.mbn:     SWIX55C_03.14.10.01 f439de jenkins 2024/01/30 06:12:07 rfctag:0
12200_0.mbn:     SWIX55C_03.14.10.01 f439de jenkins 2024/01/30 06:12:07 rfctag:0
12201_0.mbn:     SWIX55C_03.14.10.01 f439de jenkins 2024/01/30 06:12:07 rfctag:0
22202_0.mbn:     SWIX55C_03.14.10.01 f439de jenkins 2024/01/30 06:12:07 rfctag:0
12250_0.mbn:     SWIX55C_03.14.10.01 f439de jenkins 2024/01/30 06:12:07 rfctag:0
12300_0.mbn:     SWIX55C_03.14.10.01 f439de jenkins 2024/01/30 06:12:07 rfctag:0
12350_0.mbn:     SWIX55C_03.14.10.01 f439de jenkins 2024/01/30 06:12:07 rfctag:0
12400_0.mbn:     SWIX55C_03.14.10.01 f439de jenkins 2024/01/30 06:12:07 rfctag:0
12450_0.mbn:     SWIX55C_03.14.10.01 f439de jenkins 2024/01/30 06:12:07 rfctag:0
12451_0.mbn:     SWIX55C_03.14.10.01 f439de jenkins 2024/01/30 06:12:07 rfctag:0
12500_0.mbn:     SWIX55C_03.14.10.01 f439de jenkins 2024/01/30 06:12:07 rfctag:0
1
 
 
 OK
 AT!RFDEVSTATUS?
 
 
 instance,manufacture id,product id,device status
 0  ,0x217 ,0xfed ,PRESENT
 1  ,0x217 ,0x35  ,PRESENT
 2  ,0x217 ,0x1c3 ,PRESENT
 3  ,0x217 ,0x412 ,PRESENT
 4  ,0x217 ,0x35  ,PRESENT
 5  ,0x217 ,0x1a8 ,PRESENT
 6  ,0x217 ,0x418 ,PRESENT
 7  ,0x217 ,0x337 ,PRESENT
 8  ,0x217 ,0x1ad ,PRESENT
 9  ,0x217 ,0x338 ,PRESENT
 10 ,0x217 ,0x1ac ,PRESENT
 11 ,0x217 ,0x338 ,PRESENT
 12 ,0x217 ,0x142 ,PRESENT
 13 ,0x217 ,0x417 ,PRESENT
 14 ,0x217 ,0x338 ,PRESENT
 15 ,0x217 ,0x26f ,PRESENT
 16 ,0x217 ,0x26f ,PRESENT
 17 ,0x217 ,0x26e ,PRESENT
 18 ,0x217 ,0x4d0 ,PRESENT
 19 ,0x217 ,0x26e ,PRESENT
 20 ,0x217 ,0x4d0 ,PRESENT
 21 ,0x217 ,0x253 ,PRESENT
 22 ,0x217 ,0x253 ,PRESENT
 23 ,0x217 ,0x263 ,PRESENT
 24 ,0x217 ,0x254 ,PRESENT
 25 ,0x217 ,0x254 ,PRESENT
 26 ,0x217 ,0x260 ,PRESENT
 27 ,0x217 ,0x255 ,PRESENT
 28 ,0x217 ,0x26e ,PRESENT
 29 ,0x217 ,0x4d0 ,PRESENT
 30 ,0x217 ,0x253 ,PRESENT
 31 ,0x217 ,0x263 ,PRESENT
 32 ,0x217 ,0x254 ,PRESENT
 33 ,0x217 ,0x253 ,PRESENT
 34 ,0x217 ,0x254 ,PRESENT
 35 ,0x134 ,0x17  ,PRESENT
 36 ,0x134 ,0x14  ,PRESENT
 37 ,0x134 ,0x15  ,PRESENT
 
 OK
 at!lteinfo?

!LTEINFO:
Serving:   EARFCN MCC MNC   TAC      CID Bd D U SNR PCI  RSRQ   RSRP   RSSI RXLV
             1550 466  01 27133 01ADBD16  3 5 5   5 426 -11.3  -72.9  -40.6 --

IntraFreq:                                          PCI  RSRQ   RSRP   RSSI RXLV
                                                    134 -14.0  -76.6  -55.5 --
                                                    213 -14.2  -80.5  -55.5 --

InterFreq: EARFCN ThresholdLow ThresholdHi Priority PCI  RSRQ   RSRP   RSSI RXLV
             3250            0           0        0 426 -11.3  -80.3  -46.4   0
             3250            0           0        0 213  -9.6  -76.9  -59.0   0
             3250            0           0        0 134 -14.4  -81.8  -59.0   0
             9310            0           0        0 426 -18.3  -75.0  -34.4   0
             9310            0           0        0 134 -10.6  -68.7  -50.4   0
             9310            0           0        0 213 -17.5  -79.0  -50.4   0

CA SCell : EARFCN   SCID   Bd  ST  D  U   Mdl  Mul  PCI  RSRP   RSSI   SINR
             3250     1     7   1  5  0    0    0  426  -83.2  -47.1    0
             9310     2    28   1  5  0    0    0  426  -73.7  -34.4   -4

WCDMA:     UARFCN ThreshL ThreshH Prio PSC   RSCP  ECN0 RXLV


OK
at!nrinfo?

!NRINFO:
Connectivity Mode: NSA

NR5G Cell ID:    ---
NR5G band:       n78                    NR5G Carrier ID: 0
NR5G dl bw:      80 MHz                 NR5G ul bw:      80 MHz
NR5G Tx Power:   17                     NR5G Tx chan:    625334
NR5G Rx chan:    625334
NR5G dl MIMO:    4                      NR5G ul MIMO:    1
NR5G(sub6) Rx0 RSSI (dBm):   -34.6      NR5G(sub6) Rx1 RSSI (dBm):   -33.8
NR5G(sub6) Rx2 RSSI (dBm):   -33.9      NR5G(sub6) Rx3 RSSI (dBm):   -31.0

NR5G RSRP (dBm): -70                    NR5G RSRQ (dB):  -12
NR5G SINR (dB):   7.0


OK
2

Hi @linklin,

Could you please take a look at the below questions and share your answers?

  • Please make sure to insert four antennas.
  • Could you please share the full iperf3 commands used for testing?
  • Are you using the board from Semtech for testing?
  • Has the driver been installed on the Linux host?

Thanks,

3
  • Please make sure to insert four antennas.

Yes, four high-gain full-band 5G NR antennas have been inserted.

  • Could you please share the full iperf3 commands used for testing?

I use two tools,
iperf3 -c -P10 -i1 -t100 -R
speedtest --share

  • Are you using the board from Semtech for testing?

No, I’m on a Marvell development motherboard.

  • Has the driver been installed on the Linux host?

Yes, It’s already installed.

root@localhost:~# lsmod
Module                  Size  Used by
sierra                262144  0
qcaux                 262144  0
cdc_mbim              327680  0
qmi_wwan              327680  0
r8153_ecm             262144  0
cdc_ncm               327680  1 cdc_mbim
qcserial              262144  1
cdc_wdm               327680  3 cdc_mbim,qmi_wwan
cdc_ether             327680  2 r8153_ecm,cdc_ncm
usb_wwan              327680  1 qcserial
usbserial             327680  6 qcaux,qcserial,sierra,usb_wwan
4

Hi @linklin,

Based on your comment, I understand that you are using a Marvell chipset to test with the EM9191 module. As far as I know, Semtech has previously run iperf on a Marvell (CN9130) to test throughput, achieving around 1.9x Gbps (with a DL link rate of 2 Gbps).
Could you please answer the following questions to narrow down the issue:

  1. Which SIM are you using? Try inserting the SIM into a phone to test throughput.
  2. Have you installed the latest driver from Semtech?
  3. Are you running iperf3 on the Marvell MCU or another device? If you are using another device, please provide the test topology.
  4. Could you please share more details about the Marvell chipset used in this case? What is its name?

Thanks,