[srslte-users] Ck and Ik

Thu Jul 8 14:44:23 UTC 2021

Hi SRSRAN,
can you help me with quie Ck and Ik stion regarding Ck and Ik ?

On Thu, Jun 17, 2021 at 3:19 PM
<srslte-users-request at lists.softwareradiosystems.com> wrote:
>
> Send srslte-users mailing list submissions to
>         srslte-users at lists.softwareradiosystems.com
>
> To subscribe or unsubscribe via the World Wide Web, visit
>         https://lists.softwareradiosystems.com/mailman/listinfo/srslte-users
> or, via email, send a message with subject or body 'help' to
>         srslte-users-request at lists.softwareradiosystems.com
>
> You can reach the person managing the list at
>         srslte-users-owner at lists.softwareradiosystems.com
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of srslte-users digest..."
>
>
> Today's Topics:
>
>    1. Re: Srsue with USRP N310 for MIMO 2x2 (Andre Puschmann)
>    2. Ck and Ik (Mirko Kovacevic)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Wed, 16 Jun 2021 22:41:43 +0200
> From: Andre Puschmann <andre at srs.io>
> To: Fran?ois L?gal <legal-francois at orange.fr>,
>         srslte-users at lists.softwareradiosystems.com
> Subject: Re: [srslte-users] Srsue with USRP N310 for MIMO 2x2
> Message-ID: <c56d5869-862d-55e8-ca99-437ca402560e at srsio.com>
> Content-Type: text/plain; charset=utf-8
>
> Hey Fran?ois,
>
>
> [1]
> https://docs.srsran.com/en/latest/app_notes/source/5g_nsa/source/index.html#srsue
>
> On 16/6/21 20:04, Fran?ois L?gal wrote:
> > I?m trying to use srsue with a USRP N310 vs an LTE cell in conducted
> > mode. Using RF port 0 and 1 on the same daughter board.
> > ?
> > -When the cell is configured in SISO, the srsue can attach without any
> > issue.
> > -When the cell is configured in 2x2 MIMO, srsue cannot attach at all.
> > Srsue is configured with 2 antennas in ue.conf.
>
> that is likely an issue with UHD and how the streamers are configured.
> You can circumvent that by configuring a fixed sample rate that is
> configured at startup, see [1] for how to do that with the UE.
>
> For the N310, use 15.36e6 as sample rate for 10 MHz cells. And make sure
> to set the LTE sample rate option.
>
> > ?
> > Based on the logs, srsue can decode the MIB on the small band of 1920.
> > Then there is a switch to a wider band of 15360 (for 10 MHz chBW cell),
> > the MIB is not decoded anymore.?
> > It seems that there is no correlation peak found for PSS this time in
> > this second stage for cell search / CAMPING
> > Then we are stuck in this SYNC attempt loop.
> > ?
> > With a USRP B210, the attach works fine in MIMO 2x2
> > ?
> > The call to srsue is made without specific RF options in the command
> > line. All other options are specified in the ue.conf file.
>
> try:
>
> [rf]
> nof_antennas = 2
> device_name = uhd
> device_args = type=x300,clock=external,sampling_rate=15.36e6
> srate = 15.36e6
>
> [expert]
> lte_sample_rates = true
>
> > ?
> > 1-Is it a known issue and it there an easy workaround such a using
> > specific RF parameters for USRP ?
>
> See above.
>
> > 2-To which extend srsue (srsran) has been validated in front of a USRP
> > N310 in MIMO 2x2, 4x4 etc.
>
> We don't use the N310 a lot and it also doesn't work well with UHD4. I
> strongly recommend to use 3.15.
>
> In general, we don't support 4x4 MIMO, "just" 2x2.
>
>
> Cheers
> Andre
>
>
> ------------------------------
>
> Message: 2
> Date: Wed, 16 Jun 2021 20:48:03 +0200
> From: Mirko Kovacevic <northmirko at gmail.com>
> To: srslte-users-request at lists.softwareradiosystems.com,  srslte-users
>         <srslte-users at lists.softwareradiosystems.com>
> Subject: [srslte-users] Ck and Ik
> Message-ID:
>         <CAMYWRL8stW70zwrHTw8tmO0=EPU=bvZ7jFmk+um7ryfQN68z0A at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Hi SRSRAN
>
> >From epc.log we can find that CK and IK are calculated:
> 18:04:27.174844 [HSS    ] [D] User CK:
>     0000: 1a 3e 56 75 80 86 1c 40 a6 77 91 89 5d d2 ee c0
> 18:04:27.174848 [HSS    ] [D] User IK:
>     0000: 3e 56 75 80 86 1c 40 a6 77 91 89 5d d2 ee c0 1a
>
> But, from ue.log, no logs tagged with [USIM   ]  and calculated CK and IK
> can be found.
> Is there any chance that you can obtain  these values from USIM?
> I need CK and IK vectors to encrypt SIP signalling for VoLTE on the default
> bearer.
>
> Also I know that SRSENB supports dedicated bearer, but does it support
> SRSUE too (for RTP traffic tunneling)?
>
>
> *Kind regards,*
> *Mirko*
> -------------- next part --------------
> An HTML attachment was scrubbed...
> URL: <https://lists.softwareradiosystems.com/pipermail/srslte-users/attachments/20210616/5552f5ad/attachment-0001.htm>
>
> ------------------------------
>
> Subject: Digest Footer
>
> _______________________________________________
> srslte-users mailing list
> srslte-users at lists.softwareradiosystems.com
> https://lists.softwareradiosystems.com/mailman/listinfo/srslte-users
>
>
> ------------------------------
>
> End of srslte-users Digest, Vol 76, Issue 22
> ********************************************

--
Puno pozdrava,
Mirko Kovacevic