[srslte-users] UE attached but without IP

Wed Feb 13 20:33:24 UTC 2019

Hey Eduardo,

Can you send me on your logs enb & ue and also the console trace?

Thanks,
Justin
____
Justin Tallon Ph.D.

Software Radio Systems (SRS)
http://www.softwareradiosystems.com

+353-86-067-0753 | justin.tallon at softwareradiosystems.com

On Wed, Feb 13, 2019 at 6:11 PM Eduardo Garro Crevillen <
edgarcre at iteam.upv.es> wrote:

> Hello Justin!
>
> Thank you for your kind help.
>
> We have tried to send the video with your *ffmpeg/ffplay* configuration
> and it didn't work either. However, after routing both PCs with the
> following sentences, we were able to start playing the video:
>
> srseNB: *sudo route add -net 224.0.0.0 netmask 240.0.0.0 dev sgi_mb*
> srsUE: *sudo route add -net 224.0.0.0 netmask 240.0.0.0 dev tun_srsue*
>
> However, as you can see in the attached photo, the data rate was not
> enough and the video was received quite pixelled. We have tried to increase
> the multicast data rate by increasing the number of RBs to 100 (--enb.n_prb
> = 100), by assigning more subframes to PMCH (sf_alloc_info = 64 in SIB13),
> and/or by increasing the MTCH MCS (data_mcs_r9=25 in
> srsLTE/srsenb/src/upper/rrc.cc), but none of them has helped.
>
> We will really appreciate if you can guide us on how to increase the
> multicast data rate in order to receive a stable video stream.
>
> Kind regards, Eduardo.
>
>
> Justin Tallon <justin.tallon at softwareradiosystems.com> escribió:
>
> > Hey Eduardo!
> >
> > I have responded inline below!
> >
> > Regards,
> > Justin
> > ____
> > Justin Tallon Ph.D.
> >
> > Software Radio Systems (SRS)
> > http://www.softwareradiosystems.com
> >
> > +353-86-067-0753 | justin.tallon at softwareradiosystems.com
> >
> >
> > On Tue, Feb 12, 2019 at 11:42 AM Eduardo Garro Crevillen <
> > edgarcre at iteam.upv.es> wrote:
> >
> >> Thank you Justin for your help,
> >>
> >> I guess then if we modify this value, which is currently hard-coded with
> >> mcs=10 to a higher values and compile the code again we will be able to
> >> transmit higher bitrates.
> >>
> > Yes, this will work.
> >
> >>
> >>
> > On the other hand, let me give you a little background of our work with
> >> srsLTE and why we are asking about it. We (UPV) are collaborating within
> >> 5G-Xcast project with IRT (Jordi Gimenez in cc) in a potential eMBMS
> >> Proof-of-Concept. We found that SRSLTE supported it from last September
> >> (18.09), so we decided to start from that version.
> >>
> > Nice to hear of someone using it!
> >
> >
> >> After checking that socat message worked fine, we tried to
> >> transmit/receive a video stream with two different PCs using srsLTE and
> by
> >> means of VLC like this:
> >>
> >> - We first stream the video from srsEPC/srsMBMS/srseNB PC with VLC to
> >> rtp://239.255.1.1:6000.
> >> - We next check that running a second VLC in the same PC we are able to
> >> receive the video on the same IP address.
> >> - Then we try to receive the video stream at srsUE PC reading at the
> same
> >> ip address. However, we are not currently able to do it.
> >>
> >> We found that the problem was because the default interfaces were not
> the
> >> "sgi_mb" and "tun_srsue" in srsenb and srsue PCs, respectively. We
> looked
> >> for how to the transmit the video stream over a specific interface in
> VLC,
> >> but we failed. We then found how to route all multicast IP address to
> >> "sgi_mb" with: *sudo route add -net 224.0.0.0 netmask 240.0.0.0 dev
> >> sgi_mb* and running a *tcpdump* on the srsue we could see the multicast
> >> packets. However, we don't know how to play the video as the same route
> in
> >> srsue but to "tun_srsue" didn't work. We will really appreciate if you
> can
> >> help us how to solve this issue.
> >>
> > try this, I have used this in the past to get video over eMBMS
> > @UE
> > ffplay udp://tun_srsue@239.255.1.1:23000
> > @MBMS-GW
> > ffmpeg -i <video.mp4> -v 0 -vcodec h264 -f mpegts udp://
> > sgi_mb at 239.255.1.1:23000
> >
> > you will need to download ffmpeg/ffplay to do this, I hope that is not a
> > problem.
> >
> >
> >>
> >> The question related with the MCS configuration came from the
> >> discontinuous multicast packet extracted with tcpdump, so we tried to
> >> increase this value but we didn't find where it was configured. Another
> >> problem we have suffered is that when the srsuE passes to RRC IDLE
> state,
> >> no more MBMS packets can be received (even coming back to RRC CONNECTED
> >> with pings), so that we have to restart both srsenb and srsue every
> time.
> >>
> > It is possible that the service is brought down after you enter an RRC
> IDLE
> > state, you could try restarting the service with "mbms_service_start 0
> > 4321" in the command line of the UE. In any case, if this happens again,
> > send me the logs and I can have a look at them and see what's going on.
> >
> >
> >>
> >> Kind regards, Eduardo.
> >>
> >> Justin Tallon <justin.tallon at softwareradiosystems.com> escribió:
> >>
> >> > Hey Eduardo,
> >> >
> >> > The data MCS is currently hardcoded in the
> rrc::configure_mbsfn_sibs() in
> >> > srsenb/src/upper/rrc.cc.
> >> >
> >> > The reason being the parameters set in this function are meant to be
> set
> >> by
> >> > the M2/M3 interface between the MCE and the eNodeB and this interface
> was
> >> > not ready at the time of the last release. We hope to have all these
> >> values
> >> > configurable through this interface in the next release. In terms of
> the
> >> > signaling MCS, they can only be specific values 2, 7, 13 or 19.
> >> represented
> >> > as n2, n7 etc. (see picture below).
> >> >
> >> > If have any issues getting up and running with eMBMS, let me know!
> >> >
> >> > Thanks,
> >> > Justin
> >> >
> >> >
> >> > [image: image.png]
> >> > ____
> >> > Justin Tallon Ph.D.
> >> >
> >> > Software Radio Systems (SRS)
> >> > http://www.softwareradiosystems.com
> >> >
> >> > +353-86-067-0753 | justin.tallon at softwareradiosystems.com
> >> >
> >> >
> >> > On Tue, Feb 12, 2019 at 12:57 AM Eduardo Garro Crevillen <
> >> > edgarcre at iteam.upv.es> wrote:
> >> >
> >> >> As I mentioned earlier, we are now trying to transmit a multicast
> >> >> content through MBMS.
> >> >>
> >> >> We found this instructions in November 2018 thread:
> >> >>
> >> >> """
> >> >> #@MBMS-GW
> >> >> echo "Hello! I am a multicast packet!" | socat STDIO
> >> >> UDP4-DATAGRAM:239.255.1.1:6000
> >> >> ,bind=172.16.0.254,ip-multicast-if=172.16.0.254,ip-multicast-ttl=64
> >> >> #@UE
> >> >> socat STDIO
> >> >> UDP4-RECV:6000,bind=239.255.1.1,ip-add-membership=239.255.1.1:
> tun_srsue
> >> >> """
> >> >>
> >> >> We have succesfully checked that the multicast message is seen in the
> >> >> srsUE. Next, we have tried to send a video content making use of VLC,
> >> >> but we have not been able yet. We would also like to know how to
> >> >> configure the PMCH MCS, since it is not specified in the enb.conf
> >> >> files. We have found that in sib.conf.mbsfn there is a
> signalling_mcs,
> >> >> but its default value is "n2", instead of an integer number {0-28}.
> >> >>
> >> >> Thanks again, Eduardo.
> >> >>
> >> >> Eduardo Garro Crevillen <edgarcre at iteam.upv.es> escribió:
> >> >>
> >> >> > Hello again,
> >> >> >
> >> >> > We have been finally able to run properly srsLTE over the bittium
> >> >> > phone. After several configurations we decided to modify the epc
> apn
> >> >> > from 'srsapn' to 'ims' and it worked. I guess that as Pedro
> >> >> > mentioned, the Bittium always sent this apn_name regardless of
> >> >> > providing other alternatives.
> >> >> >
> >> >> > For connecting to internet we later masquerade the local network
> >> >> > interface with the Wi-Fi interface by running the
> >> >> > ./srsepc_if_masq.sh <IF_NAME>. Again, thanks Pedro for your help
> >> >> > with the issue.
> >> >> >
> >> >> > We now are dealing with the MBMS feature, but I will create a new
> >> >> > thread for this.
> >> >> >
> >> >> > Kind regards, Eduardo.
> >> >> >
> >> >> > Eduardo Garro Crevillen <edgarcre at iteam.upv.es> escribió:
> >> >> >
> >> >> >> Hi Pedro again,
> >> >> >>
> >> >> >> I have found one option within phone settings to enable/disable
> the
> >> >> >> VoLTE IMS. Nevertheless, the mobile is still not able to get an
> IP.
> >> >> >> I attach two new log and pcap files with VoLTE IMS activated and
> >> >> >> deactivated. If you take a look both configurations say at some
> >> >> >> time that there is and integrity failure (Integrity check failure.
> >> >> >> Algorithm=EIA1), and the errors start from that moment. However,
> if
> >> >> >> I change from EIA1 to EIA2 is still not working?
> >> >> >>
> >> >> >> Any other option to check?
> >> >> >>
> >> >> >> Pedro Alvarez <pedro.alvarez at softwareradiosystems.com> escribió:
> >> >> >>
> >> >> >>> Eduardo,
> >> >> >>>
> >> >> >>> The problem does not seem to be in the OP/OPc, AMF, etc., since
> the
> >> >> >>> phone accepts the authentication/security-mode-command.
> >> >> >>>
> >> >> >>> The problem seems to be in the APN settings. You are replying to
> ESM
> >> >> >>> information request with the APN name == "ims".
> >> >> >>> Can you try to see why you are sending "ims" as the APN name? Any
> >> >> >>> setting on the phone to disable IMS?
> >> >> >>>
> >> >> >>> You do not need to set apnuser/apnpass.
> >> >> >>>
> >> >> >>> Regards,
> >> >> >>> Pedro
> >> >> >>>
> >> >> >>> On Thu, Feb 7, 2019 at 12:55 PM Eduardo Garro Crevillen
> >> >> >>> <edgarcre at iteam.upv.es> wrote:
> >> >> >>>>
> >> >> >>>> Hello Pedro,
> >> >> >>>>
> >> >> >>>> We have checked that the same apn configuration (apn = srsapn)
> is
> >> in
> >> >> >>>> both, the epc.conf and in Bittium. We don't know if we need to
> >> >> >>>> configure something else, e.g. apnuser/apnpass. Since these
> fields
> >> are
> >> >> >>>> not defined in epc.conf, we have left blank in our mobile. May
> be
> >> the
> >> >> >>>> problem caused because of a bad USIM <-> user_db.csv
> >> configuration? We
> >> >> >>>> have been reading previous question were an AMF = 8000 was
> >> >> >>>> recommended, but we are using 9001. In addition, another comment
> >> was
> >> >> >>>> that milenage algorithm is not supported for opc in previous
> srsLTE
> >> >> >>>> releases.
> >> >> >>>>
> >> >> >>>> Kind regards, Eduardo.
> >> >> >>>>
> >> >> >>>> PS: In case it helps, we have succusfully connected with a
> virtual
> >> >> >>>> srsUE (ue.conf), but Bittium is not able to connect.
> >> >> >>>>
> >> >> >>>> Pedro Alvarez <pedro.alvarez at softwareradiosystems.com>
> escribió:
> >> >> >>>>
> >> >> >>>>> Can you double check if the APN configuration matches in the
> EPC
> >> >> >>>>> and the UE?
> >> >> >>>>>
> >> >> >>>>> On Thu, Feb 7, 2019 at 10:59 AM Eduardo Garro Crevillen
> >> >> >>>>> <edgarcre at iteam.upv.es> wrote:
> >> >> >>>>>>
> >> >> >>>>>>
> >> >> >>>>>> Hello everyone,
> >> >> >>>>>>
> >> >> >>>>>> We have just started trying to implement the srsLTE suite. We
> are
> >> >> >>>>>> using the srsepc, the srsenb which is connected to a USRP B210
> >> and
> >> >> >>>>>> a sysmocom USIM inside a Bittium phone as UE. However,
> although
> >> it
> >> >> >>>>>> seems that the UE is correctly attached, it does not get any
> IP
> >> >> >>>>>> address. In the attachment you can find the .log and .pcap
> files.
> >> >> >>>>>> Taking a look to the epc.log it seems that there is an error
> in
> >> the
> >> >> >>>>>> NAS authentication protocol. We have thought that there was a
> >> >> >>>>>> problem with the USIM data. However, we have checked several
> >> times
> >> >> >>>>>> that the IMSI, OPC and K are correctly included within the
> >> >> >>>>>> ue_db.csv. This the included line:
> >> >> >>>>>>
> >> >> >>>>>>
> >> >>
> >>
> ue4,901700000000004,99728e5d250001ba5f322c82d002db86,opc,b8993ca66ce802c03a2c16d237e90cd1,9001,0000000012fa,7
> >> >> >>>>>>
> >> >> >>>>>> Maybe there is an error regarding the SQN or the QCI? Since we
> >> have
> >> >> >>>>>> not found any message on the mailing list archives talking
> about
> >> >> >>>>>> these problem, we kindly ask for your help.
> >> >> >>>>>>
> >> >> >>>>>> Kind regards, Eduardo
> >> >> >>>>>>
> >> >> >>>>>> -----------------------------------------
> >> >> >>>>>> Eduardo Garro Crevillén, R&D Engineer
> >> >> >>>>>> Universitat Politècnica de València
> >> >> >>>>>> iTEAM Research Institute
> >> >> >>>>>> Mobile Communications Group
> >> >> >>>>>> -----------------------------------------
> >> >> >>>>>> _______________________________________________
> >> >> >>>>>> srslte-users mailing list
> >> >> >>>>>> srslte-users at lists.softwareradiosystems.com
> >> >> >>>>>>
> >> http://www.softwareradiosystems.com/mailman/listinfo/srslte-users
> >> >> >>>>
> >> >> >>>>
> >> >> >>>>
> >> >> >>>> -----------------------------------------
> >> >> >>>> Eduardo Garro Crevillén, R&D Engineer
> >> >> >>>> Universitat Politècnica de València
> >> >> >>>> iTEAM Research Institute
> >> >> >>>> Mobile Communications Group
> >> >> >>>> -----------------------------------------
> >> >> >>
> >> >> >>
> >> >> >> -----------------------------------------
> >> >> >>  Eduardo Garro Crevillén, R&D Engineer
> >> >> >>  Universitat Politècnica de València
> >> >> >>  iTEAM Research Institute
> >> >> >>  Mobile Communications Group
> >> >> >> -----------------------------------------
> >> >> >
> >> >> >
> >> >> >
> >> >> > -----------------------------------------
> >> >> >   Eduardo Garro Crevillén, R&D Engineer
> >> >> >   Universitat Politècnica de València
> >> >> >   iTEAM Research Institute
> >> >> >   Mobile Communications Group
> >> >> > -----------------------------------------
> >> >>
> >> >>
> >> >>
> >> >> -----------------------------------------
> >> >>    Eduardo Garro Crevillén, R&D Engineer
> >> >>    Universitat Politècnica de València
> >> >>    iTEAM Research Institute
> >> >>    Mobile Communications Group
> >> >> -----------------------------------------
> >> >> _______________________________________________
> >> >> srslte-users mailing list
> >> >> srslte-users at lists.softwareradiosystems.com
> >> >> http://www.softwareradiosystems.com/mailman/listinfo/srslte-users
> >> >>
> >>
> >> -----------------------------------------
> >>   Eduardo Garro Crevillén, R&D Engineer
> >>   Universitat Politècnica de València
> >>   iTEAM Research Institute
> >>   Mobile Communications Group
> >> -----------------------------------------
> >>
>
> -----------------------------------------
>   Eduardo Garro Crevillén, R&D Engineer
>   Universitat Politècnica de València
>   iTEAM Research Institute
>   Mobile Communications Group
> -----------------------------------------
>
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