[srslte-users] Throughput tests
Ismael Gomez
ismael.gomez at softwareradiosystems.com
Wed Feb 14 10:07:33 UTC 2018
What do you see in the UE and ENB metrics, how are the dl and ul snr levels?
El mié., 14 feb. 2018 11:01, <dmakris at iit.demokritos.gr> escribió:
> Hi Kewin,
>
> i tried to force the UE to download UDP packets with throughput 70 Mbps
> through iperf3 Reverse Mode (-R). We have a lot of losses (lost packets).
> I have attached the UE iperf3 output. Something maybe restricts the DL
> throughput.
>
> Best Regards,
> Dimitris
>
> > True, but bandwith from the client side is not reliable, because it just
> > measure the performance of your driver or hardware (as far as i know).
> >
> > It does not take into account re-transmissions, lost or other kind of
> > events. With wireless communication those ones shold be taken into
> > account.
> >
> > On Feb 13, 2018 7:42 PM, "Ismael Gomez" <
> > ismael.gomez at softwareradiosystems.com> wrote:
> >
> >> Actually with iperf(2) you dont really need a server endpoint. UDP is
> >> connection-less
> >>
> >> El mar., 13 feb. 2018 19:34, Kewin Rausch <krausch at fbk.eu> escribió:
> >>
> >>> Whoops, I was stuck with the Iperf(2) question.
> >>>
> >>> On Feb 13, 2018 7:30 PM, "Cedric Roux" <Cedric.Roux at eurecom.fr> wrote:
> >>>
> >>>> iperf3 is different :)
> >>>>
> >>>> On 02/13/2018 07:06 PM, Kewin Rausch wrote:
> >>>> > Ehm.... actually for an UDP server you should run:
> >>>> >
> >>>> > iperf -s -u
> >>>> >
> >>>> > Otherwise iperf runs a TCP server (the log on the console should
> >>>> report it).
> >>>> >
> >>>> > Usually looking at the help (--help) or at online tutorials is a
> >>>> good
> >>>> start; try googling it.
> >>>> >
> >>>> > Kewin
> >>>> >
> >>>> > On Feb 13, 2018 6:52 PM, <dmakris at iit.demokritos.gr <mailto:
> >>>> dmakris at iit.demokritos.gr>> wrote:
> >>>> >
> >>>> > 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
> >>>> <mailto:
> >>>> 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
> >>>> <mailto: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
> >>>> <mailto: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
> >>>> > >> >> >>
> >>>> > >> >> >> _______________________________________________
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> >>>> > >> >> >
> >>>> > >> >>
> >>>> > >> >>
> >>>> > >> >>
> >>>> > >> >
> >>>> > >>
> >>>> > >>
> >>>> > >>
> >>>> > >
> >>>> >
> >>>> >
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> > ai
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