[srslte-users] srsLTE 18.09 Release Announcement

[Pilz, Jens]

Thank you for the kind help and useful information...will try to get it to work and post my results.

Maybe we can start a tutorial (wiki-page) if the srsLTE guys are too occupied

Regards,
Jens

-- 
Dipl.-Phys. Jens Pilz
Project Manager

Fraunhofer Heinrich Hertz Institute HHI
Wireless Communications and Networks Department
Einsteinufer 37, 10587 Berlin, Germany
phone + 49 30 31002 390 | mobile + 49 179 1497494
email jens.pilz at hhi.fraunhofer.de
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-----Ursprüngliche Nachricht-----
Von: srslte-users [mailto:srslte-users-bounces at lists.softwareradiosystems.com] Im Auftrag von Pedro Alvarez
Gesendet: Montag, 26. November 2018 19:06
An: J Giovatto <jgiovatto at adjacentlink.com>
Cc: srslte-users <srslte-users at lists.softwareradiosystems.com>
Betreff: Re: [srslte-users] srsLTE 18.09 Release Announcement

Hi Jens --

Joe already gave you a good reply, just adding my two cents to this.

You'll need first start the EPC and the MBMS-GW:
"""
sudo srsmbms
sudo srsepc
"""
Then you can then start the eNB making sure that you enable MBMS and that you use the correct SIB config:
"""
sudo srsenb --enb_files.sib_config=sib.conf.mbsfn --expert.enable_mbsfn=true """

Finally, start up the UE selecting the MBMS service:
"""
sudo srsue --expert.mbms_service=0 --expert.average_subframe_enabled=false
"""

To send musticast data over-the-top -- i.e. from the MBMS GW to the UE
-- you can use socat:
"""
#@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
"""

Note that I am using the 239.255.1.1 multicast address for the over-the-top traffic. That is because the 239.255.0.1 is being used for the M1-U interface to multicast traffic between the MBMS-GW and the eNB (like Joe pointed out).

Hope this helps,
Pedro
On Mon, Nov 26, 2018 at 5:19 PM J Giovatto <jgiovatto at adjacentlink.com> wrote:
>
> Hi,
>
> Diagram attached.
>
> Question are you enb, epc and mbms processes running in the same machine ?
>
> If not you may need to set the M1 interfaces otherwise the defaults 
> should be fine.
>
> m1u_multi_addr = 239.255.0.1
> m1u_multi_if   = 10.99.3.1
>
> BTW 239.255.0.1 is used for M1 IPC, not your dataplane routing.
>
>
>
> The srs_mbms should create a tun interface, something like this..
>
> sgi_mb: flags=4305<UP,POINTOPOINT,RUNNING,NOARP,MULTICAST>  mtu 1500
>         inet 172.16.0.254  netmask 255.255.255.255  destination 172.16.0.254
>         inet6 fe80::c93a:e0c2:6f70:677d  prefixlen 64  scopeid 0x20<link>
>         unspec 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
> txqueuelen 500  (UNSPEC)
>         RX packets 0  bytes 0 (0.0 B)
>         RX errors 0  dropped 0  overruns 0  frame 0
>         TX packets 3  bytes 144 (144.0 B)
>         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
>
> you will need to direct your traffic to this interface for starters 
> you could use "ping -I sgi_mb 224.4.4.4" and watch the ue tun 
> interface with tcpdump etc.
>
> required config changes:
>
> ue.conf:
> mbms_service  = 0
>
> enb.conf:
> sib_config = sib.mbsfn.conf
> enable_mbsfn = true
>
> Joe
>
>
> On 11/26/18 11:10 AM, Pilz, Jens wrote:
> > Hi Andre,
> >
> > Actually i have trouble understanding the datapath. This is maybe a 
> > noob question and my configuration is not correct, but there seems to route to any 239.x.y.z network anywhere and i am not sure how to inject multicast traffic.
> >
> >
> > Regards,
> > Jens
> >
>
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