[srslte-users] Throughput tests
dmakris at iit.demokritos.gr
dmakris at iit.demokritos.gr
Thu Feb 15 12:05:07 UTC 2018
Hi Ismael,
i tried the proposed command, and the trace shows that we have 69 to 65
Mbps. I change the BW and i noticed that the bit rate is adjustable.
Is there any limitation that speedtest from okla does not work properly.
As i found the iperf use multi connections, on the other hand iperf3 uses
one connection to the server.
I have attached the trace and a photo of iperf server on the UE.
Best Regards,
Dimitris
> DL channel looks good, MCS is high and there are no retransmissions. Can
> you try from the EPC server just run:
>
> iperf -u -c 192.168.3.2 -b100M -t1000
>
> do not run any iperf server on the UE side.
>
> On Wed, 14 Feb 2018 at 13:15 <dmakris at iit.demokritos.gr> wrote:
>
>> Hi Kewin,
>>
>> i will try to check all these.
>> I have attached the UE and ENB metrics from the trace. In the beginning
>> we
>> have a good snr, but when i try to download the snr goes to nan.
>>
>> Best Regards,
>> Dimitris
>>
>> > Hey Dimitri,
>> >
>> > having lot of losses is a way to signal that the medium you are using
>> is
>> > not behaving well; as Ismael said, check carefully the level of the
>> > signal.
>> > Interference can create a real mess there. If you have USRP try to put
>> > some
>> > antennas. I use it lot of time without them, to avoid
>> catching/interfere
>> > with other experiments here in the lab, but this has countereffect on
>> > performances.
>> >
>> > HARQ processes of course will retry to carry on their jobs, and
>> probably
>> > some of the packets you are receiving correctly have been
>> re-transmitted
>> > (due to low signal/interference).
>> > Using the BW/subframes to do all those re-tx will eat up the
>> throughput.
>> >
>> > You need to be sure that the signal between eNB and UE is not
>> disturbed
>> > and
>> > optimal to carry the experiment.
>> > Once you got that, then it means that something else is wrong... and
>> you
>> > can start from there to analyze EPC and eNB.
>> >
>> > Kewin
>> >
>> >
>> > On Wed, Feb 14, 2018 at 11:07 AM, Ismael Gomez <
>> > ismael.gomez at softwareradiosystems.com> wrote:
>> >
>> >> 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
>> >>> >>>> > >> >> >>
>> >>> >>>> > >> >> >> _______________________________________________
>> >>> >>>> > >> >> >> srslte-users mailing list
>> >>> >>>> > >> >> >> srslte-users at lists.softwareradiosystems.com
>> >>> <mailto:
>> >>> >>>> srslte-users at lists.softwareradiosystems.com>
>> >>> >>>> > >> >> >> http://www.softwareradiosystems.com/
>> >>> >>>> mailman/listinfo/srslte-users
>> >>> <http://www.softwareradiosystems.com/
>> >>> >>>> mailman/listinfo/srslte-users>
>> >>> >>>> > >> >> >>
>> >>> >>>> > >> >> >
>> >>> >>>> > >> >>
>> >>> >>>> > >> >>
>> >>> >>>> > >> >>
>> >>> >>>> > >> >
>> >>> >>>> > >>
>> >>> >>>> > >>
>> >>> >>>> > >>
>> >>> >>>> > >
>> >>> >>>> >
>> >>> >>>> >
>> >>> >>>> > _______________________________________________
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>> >>> >>>> >
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>> >>> >>> --
>> >>> >>> Le informazioni contenute nella presente comunicazione sono di
>> >>> natura
>> >>> >>> privata
>> >>> >>> e come tali sono da considerarsi riservate ed indirizzate
>> >>> >>> esclusivamente
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>> >>> >>> relativo contenuto. Se avete ricevuto questo messaggio per
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>> >>> >>> preghiamo di eliminarlo e di inviare una comunicazione
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>> >>> >
>> >>> > --
>> >>> > --
>> >>> > Le informazioni contenute nella presente comunicazione sono di
>> natura
>> >>> > privata
>> >>> > e come tali sono da considerarsi riservate ed indirizzate
>> >>> esclusivamente
>> >>> > ai
>> >>> > destinatari indicati e per le finalità strettamente legate al
>> >>> relativo
>> >>> > contenuto. Se avete ricevuto questo messaggio per errore, vi
>> >>> preghiamo
>> >>> di
>> >>> > eliminarlo e di inviare una comunicazione all’indirizzo e-mail del
>> >>> > mittente.
>> >>> > --
>> >>> > The information transmitted is intended only for the person or
>> entity
>> >>> to
>> >>> > which it is addressed and may contain confidential and/or
>> privileged
>> >>> > material. If you received this in error, please contact the sender
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>> >>> > _______________________________________________
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>> >>> > srslte-users at lists.softwareradiosystems.com
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>> >>> >
>> >>>
>> >>
>> >
>> > --
>> > --
>> > Le informazioni contenute nella presente comunicazione sono di natura
>> > privata
>> > e come tali sono da considerarsi riservate ed indirizzate
>> esclusivamente
>> > ai
>> > destinatari indicati e per le finalità strettamente legate al relativo
>> > contenuto. Se avete ricevuto questo messaggio per errore, vi preghiamo
>> di
>> > eliminarlo e di inviare una comunicazione all’indirizzo e-mail del
>> > mittente.
>> > --
>> > The information transmitted is intended only for the person or entity
>> to
>> > which it is addressed and may contain confidential and/or privileged
>> > material. If you received this in error, please contact the sender and
>> > delete the material.
>> >
>>
>
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