Throughput Issue with EM7565 modem

#1

Hi Team,
While testing we are facing following two primary issue with modem EM7565:
1)Throughput Issue:
2)We are not able to get Modem driver for winodow XP(which is helpful for debugging at UE side)

Throughput Issue:
We are using EM7565 modem for our testing with band 48 and 41 , and we are facing issue with throughput issue on air and cable network too. could you please suggest on it we hardly cross 20MBps in UDP with this modem. Is there any specific way to get test throughput on this module. On other side with comercial UE + other modem on same setup we could get healthy throughput.

Thanks,
Prafull

#2

Hi Prafull,

About the XP driver:
Why do you want a driver for XP? What is your target platform, PC or an embedded device?
What driver do you use currently?
Tput:
Are you having tput issue with UL or DL?
What do you mean “cable network” are you testing with a callbox? You should be getting near theoretical max tput with a callbox.

“On other side with commercial UE”
Are you testing on the same platform? Is the other modem a SWI modem too?
I’d start sorting out your driver issue.
Then check whether your signal is good.
At!gstatus?

Thanks,
James

#3

Hi James,
I am using tools such as QXDM license version on one dedicated machine , to get the UE side logs for that purpose I need EM7565 modem driver to access seria console through Win XP machine.

Currently I am facing tput issue in both DL/UL but more concentration on DL. Its look to be that DL issue dominate the UL tput too.

Yes I am using same platform(LTE module which is embedded device-kind of mobile cell) for both comercial UE and EM 57565.

I have seen more fluctuation in modem reporting UL signal parameter compare to comercial UE.

On window 7 it works fine for Win XP it unable to locate the driver for modem please find aatach screenshot for same

win

Win_7

Thanks,
Prafull

#4

well reading the driver description we only support win7+
“Below are the available Windows 7/ Windows 8 /Windows 10 Driver Package for MC Series Modules.”

You can still try the QMI driver:
https://source.sierrawireless.com/resources/airprime/software/airprime-em_mc-series-windows-drivers-qmi-build-latest-release/

So you are running QXDM on the XP?
QXDM also supports connection through a socket.

for example:
on linux I’m running UART to socket app (remserial) this is the client and QXDM / QPST is the server
./remseriali386 -r “$WindowsIP” -p “$Port” -s “115200 raw” “$ModemDM”

ModemDM="/dev/ttyUSB0"

#5

Thanks james for driver info which is workout for me.
Can you help on tput issue, which is constant for me.

Please find below g!status command output while UDP data going:

at!gstatus?

!GSTATUS:

Current Time: 1346 Temperature: 45

Reset Counter: 1 Mode: ONLINE

System mode: LTE PS state: Attached

LTE band: B41 LTE bw: 10 MHz

LTE Rx chan: 40920 LTE Tx chan: 40920

LTE SSC1 state:NOT ASSIGNED

LTE SSC2 state:NOT ASSIGNED

LTE SSC3 state:NOT ASSIGNED

LTE SSC4 state:NOT ASSIGNED

EMM state: Registered Normal Service

RRC state: RRC Connected

IMS reg state: No Srv

PCC RxM RSSI: -50 PCC RxM RSRP: -80

PCC RxD RSSI: -41 PCC RxD RSRP: -70

Tx Power: -16 TAC: XXXXXX

RSRQ (dB): -12.2 Cell ID: XXXXXX
SINR (dB): 26.0

#6

Ok your signal is very good.

How much data are you sending? And what tool do you use to measure tput?
post a sample of your tput log.

#7

Hi James,
For UDP I am pumpring around 35-40Mbps but at UE side I could get around 15-20 Mbps. I am using iperf
And one more observation I found today for FDD band 3 its work as per expectations DL around 72 Mbps (TCP) and UL 20 Mbps (TCP) on 10Mhz

In TDD we are facing this issue , its looks to be more pkt drop in TDD even though the ULSINR and overall CQI reported by UE for serving cell is pretty good.

Please find below output for !gstatus on FDD where I could get good throughput

at!gstatus?

!GSTATUS:

Current Time: 218 Temperature: 35

Reset Counter: 1 Mode: ONLINE

System mode: LTE PS state: Attached

LTE band: B3 LTE bw: 10 MHz

LTE Rx chan: 1849 LTE Tx chan: 19849

LTE SSC1 state:NOT ASSIGNED

LTE SSC2 state:NOT ASSIGNED

LTE SSC3 state:NOT ASSIGNED

LTE SSC4 state:NOT ASSIGNED

EMM state: Registered Normal Service

RRC state: RRC Connected

IMS reg state: No Srv

PCC RxM RSSI: -20 PCC RxM RSRP: -51

PCC RxD RSSI: -30 PCC RxD RSRP: -60

Tx Power: -44 TAC: XXX
RSRQ (dB): -12.2 Cell ID: XXXX

SINR (dB): 26.8

Thanks,
Prafull

#8

Are you testing with a callbox or live NTWK?
On the live NTWK tput cannot be reliably measured.

#9

I am measuring on live network test setup. Which usually we follow for our all testing.

#10

How much tput do you expect?
Do you know the theoretical max the NTWK can provide?
Why do you think your tput is low?
Do you have another device to compare to?

#11

Hi James,
On 10Mhz band 41 TDD we are expecting 50+ TCP DL and 4Mbps UL. Which is we currently getting on comercial UE (Samsung) also on the other Sierra Wirless modem too which we used for our testing.

Basically our target is Band:48 on theire also we are facing same issue with EM7565.
Thanks,
Prafull

#12

Hi Prafull,

which one would that be?

Thanks,
James

#13

Hi James
On MC 7430 we are able to get expected result.
We are having multiple EM7565 on every module we are facing same issue

Thanks,
Prafull

#14

Hi James,
Any update on this…?
One more query , while debugging this issue one of the open source , I came across same issue, related to CA .
Is this issue related to CA …? If Yes can you please give me a detail about this…?
also I tried to execute at!lteca=?.. but its not implemented.
Is this module support such functionalityu or not…?

Also I am not able to execute the at!antsel? to check the antenaa configuration… can you please help me with that…please find below my hardware details…

ATI
Manufacturer: Sierra Wireless, Incorporated

Model: EM7565
Revision: SWI9X50C_01.07.02.00 6c91bc jenkins 2018/06/13 23:08:16

Thanks,
Prafull

#15

Hi Prafull,

CA is controlled by the NTWK. In your case CA is not available.

=== antsel: you need to enter at!entercnd=“A710”
at!entercnd=“A710”
OK
at!antsel?
No Setting

OK

“On 10Mhz band 41 TDD we are expecting 50+ TCP DL and 4Mbps UL.”
This is very close to the theoretical max… Not bad on the live NTWK.
I quickly tested UDP DL on the CMW500 with 10Mhz BW B41. I didn’t know the configuration , I just picked the highest DL (config 4 ) which is around 51Mbps on the CMW.

With UDP I was getting 51Mbps in DL on the server side (PC)
[ 4] 142.0-143.0 sec 5.54 MBytes 46.5 Mbits/sec 0.252 ms 80/ 4033 (2%)
[ 4] 143.0-144.0 sec 5.82 MBytes 48.8 Mbits/sec 0.336 ms 60/ 4211 (1.4%)
[ 4] 144.0-145.0 sec 5.53 MBytes 46.4 Mbits/sec 4.200 ms 61/ 4005 (1.5%)
[ 4] 145.0-146.0 sec 5.98 MBytes 50.2 Mbits/sec 0.337 ms 61/ 4327 (1.4%)
[ 4] 146.0-147.0 sec 6.33 MBytes 53.1 Mbits/sec 0.339 ms 73/ 4591 (1.6%)
[ 4] 147.0-148.0 sec 5.99 MBytes 50.2 Mbits/sec 0.320 ms 68/ 4339 (1.6%)
[ 4] 148.0-149.0 sec 5.76 MBytes 48.3 Mbits/sec 0.323 ms 53/ 4160 (1.3%)
[ 4] 149.0-150.0 sec 5.99 MBytes 50.3 Mbits/sec 0.318 ms 69/ 4342 (1.6%)
[ 4] 150.0-151.0 sec 5.40 MBytes 45.3 Mbits/sec 0.226 ms 52/ 3905 (1.3%)
[ 4] 151.0-152.0 sec 5.83 MBytes 48.9 Mbits/sec 0.226 ms 50/ 4208 (1.2%)
[ 4] 152.0-153.0 sec 5.70 MBytes 47.8 Mbits/sec 0.228 ms 61/ 4126 (1.5%)
[ 4] 153.0-154.0 sec 6.22 MBytes 52.2 Mbits/sec 0.227 ms 65/ 4503 (1.4%)
[ 4] 154.0-155.0 sec 6.24 MBytes 52.3 Mbits/sec 0.340 ms 58/ 4509 (1.3%)
[ 4] 155.0-156.0 sec 5.87 MBytes 49.2 Mbits/sec 0.323 ms 67/ 4254 (1.6%)
[ 4] 156.0-157.0 sec 5.44 MBytes 45.7 Mbits/sec 0.322 ms 66/ 3948 (1.7%)
[ 4] 157.0-158.0 sec 5.88 MBytes 49.3 Mbits/sec 0.319 ms 56/ 4251 (1.3%)
[ 4] 158.0-159.0 sec 5.68 MBytes 47.6 Mbits/sec 0.227 ms 72/ 4123 (1.7%)
[ 4] 159.0-160.0 sec 5.69 MBytes 47.7 Mbits/sec 0.227 ms 70/ 4127 (1.7%)
[ 4] 160.0-161.0 sec 6.10 MBytes 51.2 Mbits/sec 0.226 ms 67/ 4417 (1.5%)
[ 4] 161.0-162.0 sec 6.32 MBytes 53.0 Mbits/sec 0.331 ms 86/ 4595 (1.9%)
[ 4] 162.0-163.0 sec 5.92 MBytes 49.7 Mbits/sec 0.320 ms 71/ 4296 (1.7%)
[ 4] 163.0-164.0 sec 5.87 MBytes 49.3 Mbits/sec 0.321 ms 63/ 4251 (1.5%)

at!gstatus?
!GSTATUS:
Current Time: 861 Temperature: 37
Reset Counter: 2 Mode: ONLINE
System mode: LTE PS state: Attached
LTE band: B41 LTE bw: 10 MHz
LTE Rx chan: 40620 LTE Tx chan: 40620
LTE SSC1 state:NOT ASSIGNED
LTE SSC2 state:NOT ASSIGNED
LTE SSC3 state:NOT ASSIGNED
LTE SSC4 state:NOT ASSIGNED
EMM state: Registered Normal Service
RRC state: RRC Connected
IMS reg state: No Srv

PCC RxM RSSI: -55 PCC RxM RSRP: -86
PCC RxD RSSI: -60 PCC RxD RSRP: -90
Tx Power: 20 TAC: 0001 (1)
RSRQ (dB): -13.3 Cell ID: 00002000 (8192)
SINR (dB): 29.2

OK
ati
Manufacturer: Sierra Wireless, Incorporated
Model: EM7565
Revision: SWI9X50C_01.08.04.00 dbb5d0 jenkins 2018/08/21 21:40:11
MEID: 35926008000022
ESN: 12801925343, 801D60DF
IMEI: 359260080000224
IMEI SV: 8
FSN: UF726185760404
+GCAP: +CGSM

OK

I’d upgrade the FW to the latest 1.8.4.00. I don’t think this is a FW issue though.
To debug this issue further we’d need DM logs, but this is beyond the scope of forum support.
If you purchased the modems though our distributor, please contact them.

Thanks,
James

#16

Hi James,
On MC7430 I have tested with Band 41 10Mhz. I got DL TCP 51Mbps and UL 3.7 Mbps.

Regarding FW : I have updated it to latest one SWI9X50C_01.08.04.00 but it has not make such impact.

We are using DL config 2 and special subframe 7.

Also with Band 48 , we configure our network with 20Mhz but in Em7565 it show 10Mhz in at!gstatus? …output

at!gstatus?
!GSTATUS:
Current Time: 2693 Temperature: 35
Reset Counter: 1 Mode: ONLINE
System mode: LTE PS state: Attached
LTE band: B48 LTE bw: 10 MHz
LTE Rx chan: 56040 LTE Tx chan: 56040
LTE SSC1 state:NOT ASSIGNED
LTE SSC2 state:NOT ASSIGNED
LTE SSC3 state:NOT ASSIGNED
LTE SSC4 state:NOT ASSIGNED
EMM state: Registered Normal Service
RRC state: RRC Connected
IMS reg state: No Srv

PCC RxM RSSI: -39 PCC RxM RSRP: -68
PCC RxD RSSI: -45 PCC RxD RSRP: -75
Tx Power: -36 TAC: XXXXX
RSRQ (dB): -10.3 Cell ID: XXXX
SINR (dB): 24.8

OK

Thanks,
Prafull

#17

Hi James,
Can you give me the procedure, to collect DM logs. So i can proceed with distributor for further assistance.
We have QXDM to collect UE specific logs. Is the DM logs something which can be collected using QXDM software ?

Also can you please provide me the result with TDD config:2 , special subframe config:7 on Band:41 10Mhz. So that we are testing the same config.
Thanks,
Prafull

#18

Hi Prafull,

Please contact your distributor with the requests.

Thanks,
James