# OAI Progress - next error

**URL:** <https://discourse.myriadrf.org/t/oai-progress-next-error/2552>\
**Category:** RAN Forum\
**Created:** [29 March 2018 22:42 UTC](https://discourse.myriadrf.org/t/oai-progress-next-error/2552 "2018-03-29T22:42:10Z")\
**Posts on this page:** 13\
**Page:** 1

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**Author:** ![cswiger](https://yyz2.discourse-cdn.com/flex034/user_avatar/discourse.myriadrf.org/cswiger/32/197_2.png) [@cswiger](https://discourse.myriadrf.org/u/cswiger)\
**Post date:** [29 March 2018 22:42 UTC](https://discourse.myriadrf.org/t/oai-progress-next-error/2552/1 "2018-03-29T22:42:10Z")

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Made some progress with OAI / LimeSDR - have a phone registered and some data flowing, can ping, etc. The last Major Malfunction was not understanding the security relationship between OP, Ki and OPc and the howto guides barely touch on them. I just picked this in hss.conf:

> OPERATOR\_key = “11111111111111111111111111111111”; # OP key matching your database

not knowing exactly what it should be, and using a non-related OPc and Ki in the user database.  
After picking another key, and calculating the proper OPc using auchss.py { [Bjoern Riemer / osmo-sim-auth · GitLab](https://gitlab.fokus.fraunhofer.de/bri/osmo-sim-auth) } the phone registers OK now.

Next error is this - mentioned in a previous thread, but the solution proffered there ( use the non 1v4.ini ) does not work for mine, actually seems to make it worse. Another discussion stated that could be a follow on error for ULSCH consecutive error count reached 20, triggering UL Failure

Anyone have experience how to get around this then?

> [PHY][W][eNB 0, CC 0] frame 633, subframe 8, UE 0: ULSCH consecutive error count reached 20, triggering UL Failure  
> [MAC][I][UL\_failure\_indication] [eNB 0][UE 0/80e6] Frame 633 subframeP 8 Signaling UL Failure for UE 0 on CC\_id 0 (timer 0)  
> [PHY][E]ERROR: Format 1A: rb\_alloc (1ff) \> RIV\_max (144)

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**Author:** ![cswiger](https://yyz2.discourse-cdn.com/flex034/user_avatar/discourse.myriadrf.org/cswiger/32/197_2.png) [@cswiger](https://discourse.myriadrf.org/u/cswiger)\
**Post date:** [31 March 2018 01:06 UTC](https://discourse.myriadrf.org/t/oai-progress-next-error/2552/2 "2018-03-31T01:06:18Z")

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Last obstacle overcome - here’s a video of a Galaxy S4 Mini playing a video from youtube over OAI, it’s been playing steady for the past hour.

What helps is running it with the xforms display and looking for a good trellis pattern, and I found with basic lmssdr power and no duplexer the ue needs to be very close, a couple of feet maybe, positioning is critical to get a good pattern and hence reliable communication. It’s using the band7 config which is 2.68GHz dl, which is only about 11cm wavelength so it does not take much to move a quarter wave!

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**Author:** ![martywittrock](https://yyz2.discourse-cdn.com/flex034/user_avatar/discourse.myriadrf.org/martywittrock/32/66_2.png) [@martywittrock](https://discourse.myriadrf.org/u/martywittrock)\
**Post date:** [31 March 2018 01:12 UTC](https://discourse.myriadrf.org/t/oai-progress-next-error/2552/3 "2018-03-31T01:12:31Z")

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@cswiger - Chuck,

WHERE IS THE MILLION HEARTS BUTTON FOR THIS?!! INCREDIBLE FEAT…!! You rule…!!

73 de Marty, KN0CK

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**Author:** ![cswiger](https://yyz2.discourse-cdn.com/flex034/user_avatar/discourse.myriadrf.org/cswiger/32/197_2.png) [@cswiger](https://discourse.myriadrf.org/u/cswiger)\
**Post date:** [31 March 2018 15:18 UTC](https://discourse.myriadrf.org/t/oai-progress-next-error/2552/4 "2018-03-31T15:18:58Z")

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Thanks Marty 😊

Testing with AndSMB and a local file store gets about 150KB/sec (bytes) up/down speed test, which jives with an honest 1.5Mbps (bits) d/l speed test.

Here’s some better screenshots of working LTE UL SCOPE eNB displays, signals to look for.

Relatively idle:  
[![](http://swigerco.com/OAI_display.jpg) ](http://swigerco.com/OAI_display.jpg)

Downloading data:  
[![](http://swigerco.com/OAI_display_2.jpg) ](http://swigerco.com/OAI_display_2.jpg)

Moving on to researching an affordable hobbyist duplexer…  
There’s a UPD007A about $23 but I cannot find quantities less than 100, and the 2mm sq cell phone duplexers at about $4 would be challenging to solder or make a breakout board.

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**Author:** ![cswiger](https://yyz2.discourse-cdn.com/flex034/user_avatar/discourse.myriadrf.org/cswiger/32/197_2.png) [@cswiger](https://discourse.myriadrf.org/u/cswiger)\
**Post date:** [1 April 2018 21:15 UTC](https://discourse.myriadrf.org/t/oai-progress-next-error/2552/5 "2018-04-01T21:15:29Z")

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Last brag - testing with aperf / iperf and the phone positioned JUST RIGHT gets up to 8.1Mbps with this nice looking constellation:

[![](http://swigerco.com/OAI_LTE_8-09_Mbps_xforms.jpg) ](http://swigerco.com/OAI_LTE_8-09_Mbps_xforms.jpg)

> [6] local 192.168.1.226 port 5001 connected with 172.16.0.4 port 39679  
> [6] 0.0- 1.6 sec 663 KBytes 3.29 Mbits/sec  
> [4] local 192.168.1.226 port 5001 connected with 172.16.0.4 port 47701  
> [4] 0.0-10.5 sec 7.51 MBytes 5.99 Mbits/sec  
> [6] local 192.168.1.226 port 5001 connected with 172.16.0.4 port 49518  
> [6] 0.0-10.6 sec 10.3 MBytes **8.10 Mbits/sec**  
> [4] local 192.168.1.226 port 5001 connected with 172.16.0.4 port 59844  
> [4] 0.0-10.8 sec 10.4 MBytes 8.09 Mbits/sec  
> [6] local 192.168.1.226 port 5001 connected with 172.16.0.4 port 38994  
> [6] 0.0-10.7 sec 10.3 MBytes 8.09 Mbits/sec

Looks like channel training / adapting as each test progressed from 3.3, 6.0 and peaked at 8.10Mbps.

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**Author:** ![andrewback](https://avatars.discourse-cdn.com/v4/letter/a/22d042/32.png) [@andrewback](https://discourse.myriadrf.org/u/andrewback)\
**Post date:** [2 April 2018 09:58 UTC](https://discourse.myriadrf.org/t/oai-progress-next-error/2552/6 "2018-04-02T09:58:00Z")

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Nice work, thanks for sharing!

Don’t suppose you’d be up for putting together a wiki page documenting how to recreate this?

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**Author:** ![cswiger](https://yyz2.discourse-cdn.com/flex034/user_avatar/discourse.myriadrf.org/cswiger/32/197_2.png) [@cswiger](https://discourse.myriadrf.org/u/cswiger)\
**Post date:** [2 April 2018 15:51 UTC](https://discourse.myriadrf.org/t/oai-progress-next-error/2552/7 "2018-04-02T15:51:00Z")

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In progress [https://wiki.myriadrf.org/OpenAirInterface\_LTE](https://wiki.myriadrf.org/OpenAirInterface_LTE)

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**Author:** ![cswiger](https://yyz2.discourse-cdn.com/flex034/user_avatar/discourse.myriadrf.org/cswiger/32/197_2.png) [@cswiger](https://discourse.myriadrf.org/u/cswiger)\
**Post date:** [9 April 2018 23:50 UTC](https://discourse.myriadrf.org/t/oai-progress-next-error/2552/8 "2018-04-09T23:50:41Z")

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Oh yes, a proper duplexer helps a lot - the folks at [http://www.richardsonrfpd.com/Pages/Product-Details.aspx?productId=1152678](http://www.richardsonrfpd.com/Pages/Product-Details.aspx?productId=1152678) were kind enough to sell a small quantity (2) of their USD007A LTE Band7 ceramic duplexers for $38.60 each (incl 3% cc charge) + $21 FedEx ground from Reno NV. Using silver solder as recommended wired it up dead bug and gets much better signal around the room, nowhere near as picky in placement.

[![](http://swigerco.com/20180409_193435.jpg) ](http://swigerco.com/20180409_193435.jpg)

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**Author:** ![dast](https://avatars.discourse-cdn.com/v4/letter/d/e56c9b/32.png) [@dast](https://discourse.myriadrf.org/u/dast)\
**Post date:** [8 January 2019 19:11 UTC](https://discourse.myriadrf.org/t/oai-progress-next-error/2552/9 "2019-01-08T19:11:52Z")

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@cswiger, have try to using the mimo.ini for oai!!! how best it is compared to the classic ini file?

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**Author:** ![cswiger](https://yyz2.discourse-cdn.com/flex034/user_avatar/discourse.myriadrf.org/cswiger/32/197_2.png) [@cswiger](https://discourse.myriadrf.org/u/cswiger)\
**Post date:** [8 January 2019 20:23 UTC](https://discourse.myriadrf.org/t/oai-progress-next-error/2552/10 "2019-01-08T20:23:56Z")

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Have not been in that space in a while - have not a clue.

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**Author:** ![Bourascom](https://avatars.discourse-cdn.com/v4/letter/b/df788c/32.png) [@Bourascom](https://discourse.myriadrf.org/u/Bourascom)\
**Post date:** [12 January 2019 00:57 UTC](https://discourse.myriadrf.org/t/oai-progress-next-error/2552/11 "2019-01-12T00:57:52Z")

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@cswiger I am emailing RidchardsonRFPD in order to order 2 pieces of **USD007A** but I have no reply from them, please how did you convince them to get your 2 pieces ??

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**Author:** ![cswiger](https://yyz2.discourse-cdn.com/flex034/user_avatar/discourse.myriadrf.org/cswiger/32/197_2.png) [@cswiger](https://discourse.myriadrf.org/u/cswiger)\
**Post date:** [12 January 2019 02:28 UTC](https://discourse.myriadrf.org/t/oai-progress-next-error/2552/12 "2019-01-12T02:28:58Z")

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Here are my notes:

**Karen Dallo-Shea**  
Inside Sales & Marketing Specialist  
RichardsonRFPD/ Arrow RF & Power  
Work: 631-851-2554  
Toll Free: 800-737-6937 x3931  
Email: [kshea@richardsonrfpd.com](mailto:kshea@richardsonrfpd.com)  
[www.richardsonrfpd.com](http://www.richardsonrfpd.com/)  
Quotations are valid for a period of 30 days

> **[RFPD\_termsofsale.pdf](https://www.richardsonrfpd.com/Documents/RFPD_termsofsale.pdf)**

Inputted a sales inquiry on the CTS website [https://www.ctscorp.com/](https://www.ctscorp.com/)  
got a reply from Thomas Strasser [Thomas.Strasser@ctscorp.com](mailto:Thomas.Strasser@ctscorp.com) that  
Our recommended source for USD007A is Richardson RFPD.

[www.richardsonrfpd.com](http://www.richardsonrfpd.com)  
Currently they should have 27pcs available.  
I replied that their minimum order is 100 units (even though only 27 are in stock!)

Karen chimed in:  
Hello Chuck,  
Karen Dallo-Shea here your account manager at Richardson RFPD.  
CTS sent me your inquiry for USD007A.  
We can support up to 27 pcs and 1-2 is fine.  
They are $ 37.50 each, stock in Reno, NV.

Then:  
Hello Chuck,  
I am not sure if you would be able to purchase 2 pcs on our website @ $37.50 but you can try. If any issue or if you do not care to try I can help place the order for you.  
For payment we accept CC but there is a 3% fee that needs to be applied and the way we do that is to include in the unit cost.

Cost for 2 pcs @ $38.63 each, plus shipping Fed Ex Ground $21.50 or we can use your freight account if you have one. Parts ship from Reno, NV

I attached the CC form you may complete or call me directly with the information.  
If you wish to pay ACH/Wire I can send you our bank info.  
Thank you  
Karen

So I called her up from work and placed a Credit Card order for 2 - with shipping that’s about $100  
Mounting app note - recommends silver solder: [https://www.ctscorp.com/wp-content/uploads/2015/10/AN1016.pdf](https://www.ctscorp.com/wp-content/uploads/2015/10/AN1016.pdf)  
from: [https://www.ctscorp.com/resource-center/application-notes/](https://www.ctscorp.com/resource-center/application-notes/)

Board for mounting:

> **[Arduino Cell Phone 4G Signal Booster / Repeater Part 1](https://www.instructables.com/id/Arduino-Cell-Phone-4G-Signal-Booster-Repeater/)**
>
> Arduino Cell Phone 4G Signal Booster / Repeater Part 1: Living on an island in the middle of nowhere, mobile/cell phone reception can be rather intermittent and it seems that there is currently no reliable open source gadget that could help me solve...

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**Author:** ![dast](https://avatars.discourse-cdn.com/v4/letter/d/e56c9b/32.png) [@dast](https://discourse.myriadrf.org/u/dast)\
**Post date:** [18 February 2019 01:20 UTC](https://discourse.myriadrf.org/t/oai-progress-next-error/2552/13 "2019-02-18T01:20:26Z")

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Hey @cswiger, did you have warning like this on the connection of your phone to the enodeB : Failed to find ue context associated with eNB ue s1ap id: 0 without duplexer? About time, how long the phone could connect to your eNB without duplexer?