# OpenAirInterface configuration
**URL:** https://discourse.myriadrf.org/t/openairinterface-configuration/557
**Category:** RAN Forum
**Created:** [25 November 2016 15:03 UTC](https://discourse.myriadrf.org/t/openairinterface-configuration/557 "2016-11-25T15:03:40Z")
**Posts on this page:** 14
**Page:** 4
### Author:  [@dast](https://discourse.myriadrf.org/u/dast)
#### Post date: [6 November 2018 15:20 UTC](https://discourse.myriadrf.org/t/openairinterface-configuration/557/62 "2018-11-06T15:20:29Z")
and it tutorial also : [OAI and LimeSDR-Mini](https://discourse.myriadrf.org/t/oai-and-limesdr-mini/3058)
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### Author:  [@Bourascom](https://discourse.myriadrf.org/u/Bourascom)
#### Post date: [6 November 2018 22:03 UTC](https://discourse.myriadrf.org/t/openairinterface-configuration/557/63 "2018-11-06T22:03:17Z")
I’ve followed step by step the tutorial of Bastien on [OpenAirInterface 4G/LTE with LimeSDR\_Mini – Linux hacking](https://bastienbaranoff.wordpress.com/2018/10/23/openairinterface-4g-lte-with-limesdr_mini/) . But I got always those output :
When i stopped the program lte-softmodem, i have this prompt : 
OS : Ubuntu 16.04.4
LimeSDR mini rev 1.1
LimeSuite version : v18.10.0-g3cbdb8bb
SoapySDR version : v0.7.0-g6d21756e
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### Author:  [@dast](https://discourse.myriadrf.org/u/dast)
#### Post date: [9 November 2018 03:18 UTC](https://discourse.myriadrf.org/t/openairinterface-configuration/557/64 "2018-11-09T03:18:19Z")
is it possible to send log with txt ! mine run correctly
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### Author:  [@Bourascom](https://discourse.myriadrf.org/u/Bourascom)
#### Post date: [10 November 2018 10:24 UTC](https://discourse.myriadrf.org/t/openairinterface-configuration/557/65 "2018-11-10T10:24:10Z")
Thanks for the reply @dast , I have solved the problem after I discovered a little mistake in my MME config file. I think now it runs correctly :
But after some moments I got this debug message after the “L” : " [PHY][I]rx\_rf: rfdevice timing drift of 2720 samples (ts\_off 26720)"
Xforms scope :
You can find my ltesoftmodem log file in this link :
> **[Dropbox](https://www.dropbox.com/s/34pj60gqztpvm9y/ltesoftmodem_log.txt?dl=0&fbclid=IwAR2Ey44R3Kn7WqqGVW2sVR88UQuZe9YEoG3l1wVEtr12B780Dmxco-aCldE)**
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### Author:  [@Diwakar](https://discourse.myriadrf.org/u/Diwakar)
#### Post date: [7 December 2018 12:36 UTC](https://discourse.myriadrf.org/t/openairinterface-configuration/557/66 "2018-12-07T12:36:50Z")
Hi ,
We have eNB compiling and running on LMSSDR, however we still have issues achieving and maintaining attach complete with UE.
Below were the error appeared in eNB…
[MAC][I][eNB\_dlsch\_ulsch\_scheduler] UE rnti 5452 : in synch, PHR 40 dB
[RRC][I]UE rnti 5452 failure timer 0/20000 [PHY][I]UE 0 : rnti 5452
[MAC][I][eNB\_dlsch\_ulsch\_scheduler] UE rnti 5452 : in synch, PHR 40 dB [RRC][I]UE rnti 5452 failure timer 0/20000
[PHY][W][eNB 0, CC 0] frame 310, subframe 2, UE 0: ULSCH consecutive error count reached 20, triggering UL Failure
[MAC][I][UL\_failure\_indication] [eNB 0][UE 0/5452] Frame 310 subframeP 2 Signaling UL Failure for UE 0 on CC\_id 0 (timer 0)
[PHY][E]ERROR: Format 1A: rb\_alloc (1ff) \> RIV\_max (144) [PHY][E]ERROR: Format 1A: rb\_alloc (1ff) \> RIV\_max (144)
[PHY][E]ERROR: Format 1A: rb\_alloc (1ff) \> RIV\_max (144) [PHY][E]ERROR: Format 1A: rb\_alloc (1ff) \> RIV\_max (144)
[PHY][E]ERROR: Format 1A: rb\_alloc (1ff) \> RIV\_max (144)
[MAC][I][eNB\_dlsch\_ulsch\_scheduler] UE 0 rnti 5452: UL Failure after repeated PDCCH orders: Triggering RRC [RRC][I]Frame 330, Subframe 1: UE 5452 UL failure, activating timer MAC: remove UE 0 rnti 5452
[MAC][I][rrc\_mac\_remove\_ue] Removing UE 0 from Primary CC\_id 0 (rnti 5452)
[RRC][I]UE rnti 5452 failure timer 6940/20000
[RRC][I]UE rnti 5452 failure timer 17180/20000
[RRC][I]Removing UE 5452 instance
[RRC][W][eNB 0] Removing UE RNTI 5452 MAC: cannot remove UE rnti 5452
[MAC][W][rrc\_mac\_remove\_ue] rrc\_mac\_remove\_ue: UE 5452 not found
[S1AP][W][s1ap\_ue\_context\_release\_req] Failed to find ue context associated with eNB ue s1ap id: 0
[S1AP][E][s1ap\_eNB\_task] Failed to find ue context associated with eNB ue s1ap id: 0
[RRC][I][FRAME 00000][eNB][MOD 00][RNTI 5452] Removed UE context [INFO] L 4266779680 [INFO] L 4343611520
Can u please share us how did u solved this problem
Thanks
Diwakar
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### Author:  [@dast](https://discourse.myriadrf.org/u/dast)
#### Post date: [28 December 2018 08:08 UTC](https://discourse.myriadrf.org/t/openairinterface-configuration/557/67 "2018-12-28T08:08:01Z")
what is your error on mme config ?
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### Author:  [@dast](https://discourse.myriadrf.org/u/dast)
#### Post date: [4 January 2019 14:49 UTC](https://discourse.myriadrf.org/t/openairinterface-configuration/557/68 "2019-01-04T14:49:47Z")
I have also the same problem with limesdrmini, Bastien says that you could resolve the problem the touching the antenna to the phone! but it still not run for me! have a look on the comment on it ; [https://bastienbaranoff.wordpress.com/2018/10/23/openairinterface-4g-lte-with-limesdr\_mini/](https://bastienbaranoff.wordpress.com/2018/10/23/openairinterface-4g-lte-with-limesdr_mini/)
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### Author:  [@venu](https://discourse.myriadrf.org/u/venu)
#### Post date: [30 March 2019 01:08 UTC](https://discourse.myriadrf.org/t/openairinterface-configuration/557/69 "2019-03-30T01:08:07Z")
> [@Ilya](#):
>
> Failed to load configuration file (null)
Hey I am facing similar kind of issue, while starting lte-softmodem with rf-config-file LimeSDR\_USB\_above\_1p8GHz\_2ch.ini file.RF loop back test was fine.
########
got sync (eNB\_thread\_synch)
Connecting to device: LimeSDR-USB, media=USB 3.0, module=FX3, addr=1d50:6108, serial=00090726074F111D
Reference clock 30.72 MHz
LoadConfig() - file not found
Failed to load configuration file
libusb: warning [libusb\_exit] application left some devices open
LoadConfig() - file not foundvennave@ubu6d1ye:~/openairinterface5g$
## @@@@@@@@@@@@@@@ Image versions: – Device identification
driver=FX3
hardware=LimeSDR-USB
boardSerialNumber=0x90726074f111d
firmwareVersion=4
gatewareVersion=2.20
hardwareVersion=4
protocolVersion=1
########################
Any idea ?
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### Author:  [@Pooya](https://discourse.myriadrf.org/u/Pooya)
#### Post date: [13 February 2020 09:06 UTC](https://discourse.myriadrf.org/t/openairinterface-configuration/557/70 "2020-02-13T09:06:46Z")
Hi
can anybody help me to connect UE to eNB?
I have problem of [S1AP] Failed to find ue context associated with eNB ue s1ap id: 0
I can see the network on UE but cannot connect to it!
Here are the logs of eNB, MME, HSS, SPGW:
[http://s7.picofile.com/file/8388061134/eNB.html](http://s7.picofile.com/file/8388061134/eNB.html)
[http://s7.picofile.com/file/8388061150/HSS.html](http://s7.picofile.com/file/8388061150/HSS.html)
[http://s6.picofile.com/file/8388061168/MME.html](http://s6.picofile.com/file/8388061168/MME.html)
[http://s7.picofile.com/file/8388061192/SPGW.html](http://s7.picofile.com/file/8388061192/SPGW.html)
I’m using limeSDR
At first the UE was in flight mode and the Out of flight mode and then serched for network and at the end i tap on the network to register the UE but it said Unable to connect, Try later
Thanks
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### Author:  [@andrewback](https://discourse.myriadrf.org/u/andrewback)
#### Post date: [13 February 2020 16:20 UTC](https://discourse.myriadrf.org/t/openairinterface-configuration/557/71 "2020-02-13T16:20:06Z")
If you don’t have any luck here, would suggest asking in the OAI community.
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### Author:  [@Pooya](https://discourse.myriadrf.org/u/Pooya)
#### Post date: [15 February 2020 06:14 UTC](https://discourse.myriadrf.org/t/openairinterface-configuration/557/72 "2020-02-15T06:14:45Z")
Thanks, but its related to LimeSDR and also i asked there but no one knows!
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### Author:  [@andrewback](https://discourse.myriadrf.org/u/andrewback)
#### Post date: [15 February 2020 08:06 UTC](https://discourse.myriadrf.org/t/openairinterface-configuration/557/73 "2020-02-15T08:06:01Z")
Right, but as far as I’m aware they developed the LimeSDR integration and so would likely be better positioned to debug any issues with this. I know it has worked before, but I have no idea if this is being actively maintained across Lime Suite and OAI releases.
I have heard of people having more luck with srsLTE and if you have a budget, Amarisoft would likely be the best bet. Assuming your use case is not somehow OAI-specific.
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### Author:  [@vikash](https://discourse.myriadrf.org/u/vikash)
#### Post date: [25 June 2020 04:35 UTC](https://discourse.myriadrf.org/t/openairinterface-configuration/557/74 "2020-06-25T04:35:09Z")
> [@andrewback](#):
>
> ckout calib-LimeSDR
Dear,
is it necessary to use Duplexer? can we not use Limesdr usb without duplexer?
Thanks
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### Author:  [@vikash](https://discourse.myriadrf.org/u/vikash)
#### Post date: [25 June 2020 05:46 UTC](https://discourse.myriadrf.org/t/openairinterface-configuration/557/75 "2020-06-25T05:46:24Z")
hi I was also getting the same error, but when i first installed soapysdr and then limesuit using below command it resolved my problem.
1. Install the SoapySDR
```auto
git clone https://github.com/pothosware/SoapySDR.git
cd SoapySDR
git pull origin master
mkdir build && cd build
cmake ..
make -j4
sudo make install
sudo ldconfig
```
git clone [https://github.com/myriadrf/LimeSuite.git](https://github.com/myriadrf/LimeSuite.git)
cd LimeSuite
git checkout stable
mkdir builddir && cd builddir
cmake …/
make -j4
sudo make install
sudo ldconfig
,
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