[srslte-users] BladeRF - Moto G5 not attaching

[Andre Puschmann]

Hey,

DL signal seems to be ok with an SNR of ~10dB, even though there is
still room for improvement. The UE transmits PRACH but eNB never
receives it. I see you use the same rx/tx gains for both UE and eNB
which is fine in principle. But to double check let's run the pdsch_enb
and pdsch_ue on both machines (and vice versa) with those exact gain
settings and check that both can receive a perfect signal, and if not
adjust the gain settings accordingly.

The bladeRF calibration is not srsLTE specific and the nuand blog and
wiki is full with helpful material on this topic.

Thanks
Andre


On 14/03/18 06:37, Ghannam, Rami wrote:
> Hello again,
> 
> I now have the following setup:
> 
>   * an Ubuntu machine with a BladeRF x115 running srsepc+srsenb
>   * another Ubuntu machine with another BladeRF x115 running srsue
> 
> srsUE is able to receive SIB information but never attaches. Any advice
> on how to proceed? Also how can I do the calibration with srsLTE?
> 
> 
> 
> I attached the config files, log files and pcap capture.
> 
> Thank you,
> 
> Rami
> ------------------------------------------------------------------------
> *From:* Ismael Gomez [ismael.gomez at softwareradiosystems.com]
> *Sent:* Tuesday, March 06, 2018 2:52 AM
> *To:* Ghannam, Rami
> *Cc:* srslte-users at lists.softwareradiosystems.com; Sharevski, Filipo
> *Subject:* Re: [srslte-users] BladeRF - Moto G5 not attaching
> 
> Can you attach with srsUE? You need to check that the RF signal looks
> good and PUSCH power settings in sib2 configuration make sense. We have
> not tested the BladeRF with srsENB. I think you may need to do some
> calibration. 
> 
> On Tue, 6 Mar 2018 at 03:50 Ghannam, Rami <RGHANNAM at cdm.depaul.edu
> <mailto:RGHANNAM at cdm.depaul.edu>> wrote:
> 
>     Hello,
> 
>     I am trying to deploy a srsLTE network. I have a BladeRF x115 and a
>     Moto G5 phone. I can successfully start srsEPC and srsENB.
> 
>     However, Moto G5 is not able to attach to the network.
>      
>     Are there any recommendations about this issue?
> 
>     Thank you.
> 
>     Rami____
> 
>     __ __
> 
>     __ __
> 
>     *Rami Ghannam*
>     PhD Candidate____
> 
>     College of Computing and Digital Media
>     <https://www.cdm.depaul.edu/Pages/default.aspx>
>     DePaul University, Chicago, IL 60604____
> 
>     __ __
> 
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