[srslte-users] Commercial UE Attach problems

Wed Nov 15 09:19:12 UTC 2017

yeah sorry, I meant /tmp/enb.log or /tmp/enb.pcap.

On Wed, 15 Nov 2017 at 10:18 Pilz, Jens <jens.pilz at hhi.fraunhofer.de> wrote:

> I assume these files are generated by srsUE?
>
>
>
> I did not yet test with srsUE but with commercial USB LTE dongle.
>
>
>
> Give me some time and I will test with srsUE. (need to figure out how to
> set IMSI, etc)
>
>
>
> Regards,
>
> Jens
>
>
>
> *Von:* Ismael Gomez [mailto:ismael.gomez at softwareradiosystems.com]
> *Gesendet:* Mittwoch, 15. November 2017 10:04
>
>
> *An:* Pilz, Jens <jens.pilz at hhi.fraunhofer.de>
> *Cc:* srslte-users at lists.softwareradiosystems.com
> *Betreff:* Re: [srslte-users] Commercial UE Attach problems
>
>
>
> Hi Jens,
>
>
>
> Can you attach the /tmp/ue.log and /tmp/ue.pcap (set log level to info and
> enable pcap in ue.conf).
>
>
>
> Thanks
>
>
>
> On Wed, 15 Nov 2017 at 08:55 Pilz, Jens <jens.pilz at hhi.fraunhofer.de>
> wrote:
>
> Hi Ismael,
>
>
>
> comments inline.
>
>
>
> *Von:* Ismael Gomez [mailto:ismael.gomez at softwareradiosystems.com]
> *Gesendet:* Dienstag, 14. November 2017 14:35
> *An:* Pilz, Jens <jens.pilz at hhi.fraunhofer.de>
> *Cc:* srslte-users at lists.softwareradiosystems.com
> *Betreff:* Re: [srslte-users] Commercial UE Attach problems
>
>
>
> 1)      You can not set nof_phy_threads bigger than 3. Only 1, 2 o 3 are
> valid.
>
> *[Pilz, Jens] Okay changed back to 3. *
>
> 2)      I think the TX/RX offset is not properly calibrated for the X300. Can
> you try setting rf.time_adv_nsamples=18
>
>
>
> *[Pilz, Jens] Thank you fort he tip. We did additional testing with
> different values and also used the PRACH calibration function from srsLTE.
> (which gave 65)…but it seems with 18 the rnti spamming stopped.*
>
> 3)      Your signal does not look very good. Make sure TX and RX antennas
> are orthogonal and correct for your band
>
>
>
> *[Pilz, Jens] The signal by eNodeB looks good with monitor antenna and
> spectrum analyser with LTE software.*
>
> *I don’t trust the X310 with UBX doughter to generate a good signal (at
> least on TX with high gain the signal gets distorted quite fast) I am
> playing with various gain settings now, but so far the attach wasn’t
> successful*
>
> *                        Anyhow, the messages in EPC look suspicious to me
> and something might be wrong there.*
>
> 4)      Make sure you adjust the PUSCH/PUCCH power control settings in
> sib.conf according to your TX power
>
>
>
> *[Pilz, Jens] Okay will adapt that.*
>
>
>
> On Tue, 14 Nov 2017 at 14:30 Pilz, Jens <jens.pilz at hhi.fraunhofer.de>
> wrote:
>
> Hi all,
>
>
>
> i got everything working on a basic level: OpenEPC 6 -> srsLTE -> USRP
> x310 -> Antenna -> Rohde & Schwarz FSW13
>
> When I try to attach commercial UE with working sim card (setup is
> verified with different eNB on same core network),
>
> I see a lot of rnti created in srsENB:
>
> RACH:  tti=7321, preamble=17, offset=0, temp_crnti=0x46
>
> RACH:  tti=7411, preamble=13, offset=0, temp_crnti=0x47
>
> SCHED: Could not transmit RAR within the window (RA TTI=7411, Window=10,
> Now=7428)
>
> RACH:  tti=7431, preamble=28, offset=0, temp_crnti=0x48
>
> Disconnecting rnti=0x47.
>
> RACH:  tti=7521, preamble=2, offset=0, temp_crnti=0x49
>
> SCHED: Could not transmit RAR within the window (RA TTI=7521, Window=10,
> Now=7541)
>
> RACH:  tti=7541, preamble=14, offset=0, temp_crnti=0x4a
>
> Disconnecting rnti=0x49.
>
> RACH:  tti=7631, preamble=38, offset=0, temp_crnti=0x4b
>
> Disconnecting rnti=0x46.
>
> Disconnecting rnti=0x48.
>
> Disconnecting rnti=0x4b.
>
> Disconnecting rnti=0x4a.
>
> RACH:  tti=8451, preamble=21, offset=0, temp_crnti=0x4c
>
> Disconnecting rnti=0x4c.
>
> RACH:  tti=9931, preamble=38, offset=0, temp_crnti=0x4d
>
> Disconnecting rnti=0x4d.
>
> RACH:  tti=10021, preamble=38, offset=0, temp_crnti=0x4e
>
> Disconnecting rnti=0x4e.
>
> RACH:  tti=10001, preamble=26, offset=0, temp_crnti=0x4f
>
> Disconnecting rnti=0x4f.
>
> RACH:  tti=1251, preamble=26, offset=0, temp_crnti=0x50
>
> Disconnecting rnti=0x50.
>
>
>
> This can be easily reproduced and linked to commercial LTE USB Dongle
> (Huawei E392).
>
> I also attached eNB log.
>
> In my opinion, one UE should only create one RACH?!?
>
>
>
> Also there is some misbehavior in MME, but I thing this is correlated to
> so many “RNTI” created.
>
>
>
> Regards,
>
> Jens
>
>
>
>
>
> --
>
> Dipl.-Phys. Jens Pilz
>
> Project Manager
>
>
>
> Fraunhofer Heinrich Hertz Institute HHI
>
> Wireless Communications and Networks Department
>
> Einsteinufer 37, 10587 Berlin, Germany
> <https://maps.google.com/?q=Einsteinufer+37,+10587+Berlin,+Germany&entry=gmail&source=g>
>
> phone + 49 30 31002 390 <+49%2030%2031002390> | mobile + 49 179 1497494
> <+49%20179%201497494>
>
> email jens.pilz at hhi.fraunhofer.de
>
> www.hhi.fraunhofer.de | Facebook
> <https://www.facebook.com/FraunhoferHHI1928> | Twitter
> <https://twitter.com/FraunhoferHHI>
>
>
>
> _______________________________________________
> srslte-users mailing list
> srslte-users at lists.softwareradiosystems.com
> http://www.softwareradiosystems.com/mailman/listinfo/srslte-users
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.srsran.com/pipermail/srsran-users/attachments/20171115/73bed5ef/attachment.htm>