[srslte-users] Throughput tests

[dmakris at iit.demokritos.gr]

Hi Ismael,

I run the iperf client from EPC, but the Smartphone does not answers, as a
server.
On the other hand, i use iperf3 server in EPC (iperf3 -s), and on the
smarthpone the iperf3 client(-c 192.168.3.1 -t 1000 -u -R). The R, means
the reverse mode. So the UE, downloads UDP packets. I set the bandwidth 75
Mbps (-b 75m), but the DL throughput is only 11 Mbps.

Best regards,
Dimitris

> run the following command from EPC (amarisoft) server:
>
> iperf -c 192.168.3.2 -b75M -t100 -u
>
> to run a DL iperf and to run UL iperf:
>
> iperf -c 192.168.3.1 -b30M -t100 -u
>
>
> On Tue, 13 Feb 2018 at 10:44 <dmakris at iit.demokritos.gr> wrote:
>
>> Hi Ismael,
>>
>> i use in the smartphone (client) the following:
>> -c 192.168.3.1 -t 1000 -u -R.
>> In the EPC (Amarisoft) runs the iperf -s (server).
>>
>> Best Regards,
>> Dimitris
>>
>> > what command do you use for UDP iperf?
>> >
>> > On Tue, 13 Feb 2018 at 10:34 <dmakris at iit.demokritos.gr> wrote:
>> >
>> >> Hi Ismael,
>> >>
>> >> thank you for your immediate response.
>> >> I tune the Tx and Rx gains to 88 and 45 dB respectively, so the snr
>> from
>> >> trace monitoring is about 27 dB.
>> >> I run the tests using speedtest from Okla, and i measure the DL
>> between
>> >> 12
>> >> and 20 Mbps. The UL is about 25 Mbps.
>> >> Then i run an iperf UDP test. When i try to download, the DL is about
>> 10
>> >> Mbps and the snr goes to -nan.
>> >>
>> >> Best Regards,
>> >> Dimitris
>> >>
>> >>
>> >> > Are you using TCP or UDP? TCP performance with srsENB is not quite
>> >> good
>> >> at
>> >> > the moment. Try UDP first.
>> >> >
>> >> > Also tune the TX and RX gains so that you have high SNR (~27-30 dB)
>> in
>> >> > both
>> >> > directions.
>> >> >
>> >> > On Tue, 13 Feb 2018 at 10:17 <dmakris at iit.demokritos.gr> wrote:
>> >> >
>> >> >> Hi srsLTE community,
>> >> >>
>> >> >>  in our testbed, we use the latest srsLTE software (Latest commit
>> >> >> 2734ce6)
>> >> >> running on an Intel Core i7-7700K CPU (8x4.2 GHz), with 16 Gbyte
>> RAM.
>> >> >> The
>> >> >> OS is Ubuntu 16.04. For the RF front end we use the Ettus B210 in
>> >> SISO
>> >> >> Mode.
>> >> >>  For 1.4, 3, 5 and 10 MHz Bandwidth, we achieve the expected
>> >> throughput.
>> >> >> But for 15 and 20 MHz, the DL varies between 12 and 20 Mbps. The
>> UL
>> >> is
>> >> >> about 25 Mbps.
>> >> >>
>> >> >>  Should we change another parameter from drb, rr, or sib
>> >> configuration
>> >> >> files?
>> >> >> Thank you for your help.
>> >> >>
>> >> >> Thank you in advance,
>> >> >> Dimitris
>> >> >>
>> >> >> _______________________________________________
>> >> >> srslte-users mailing list
>> >> >> srslte-users at lists.softwareradiosystems.com
>> >> >> http://www.softwareradiosystems.com/mailman/listinfo/srslte-users
>> >> >>
>> >> >
>> >>
>> >>
>> >>
>> >
>>
>>
>>
>