LTE KPI Optimization (Session 1): ERAB Setup Success Rate

[@OurTechPlanet]

For LTE KPIs, Call Flows & Optimization, check out the complete playlist below :) 🌐LTE KPI Optimization 💡kzbin.info/aero/PL4OXTttOk9WiA1ogmEIBYmFO_K2EhgLln

[@abdelrhmanabouelfoutouh3973]

Bro, I can't thank you enough. Your explanation is really valuable 👌

[@OurTechPlanet]

Glad to hear that

[@liton31]

This video is loaded with information in every sentence.Loved it as usual.Keep posting 🙏

[@OurTechPlanet]

Thanks a lot, Sanjay!!! It is great to hear such wonderful feedback! :)

[@theabhinavshort]

This is absolutely Amazing 👍👌😘🥰♥️

[@OurTechPlanet]

Thanks :)

[@allaeddinnebenyahia2791]

Thank you very very much bro. Please keep posting on the OPTIMIZATION

[@OurTechPlanet]

You are welcome!

[@varun284]

Amazing the way you have explained. Great knowledge

[@OurTechPlanet]

Thanks a lot :)

[@adedejiadedamola2680]

Thanks Ali. This was really very helpful. Much appreciated !!!

[@OurTechPlanet]

You are welcome :)

[@KuldeepKumarSaxena-x8m]

Hi , This Paging Cycle ( Paging Buffered in eNB) parameter is at eNodeB end OR MME end?

[@KuldeepKumarSaxena-x8m]

Please reply my query.......

[@OurTechPlanet]

If you are referring to the amount of time, the paging message is buffered in the eNB, then that is usually based on the paging cycle in the eNB. However, MME can over-write this as well but generally, the eNB value is used.

[@m.karthikeyan6482]

❤️❤️❤️❤️ Thanks from the core

[@alchemistdiscover]

Your videos are amazing..!!

[@OurTechPlanet]

Thank you so much 😀

[@as_nirwal_gamrs2223]

Oh! Nice.♥♥🥰

[@OurTechPlanet]

Thank you :)

[@cresirj6238]

Once the eNB sends RRC CONNECTION RELEASE to the UE, doesn't it cause UE to get into RRC_INACTIVE? Then, should it once again get into RRC_CONNECTED mode to send RRC CONNECTION RECONFIGURATION COMPLETE?

[@OurTechPlanet]

Yes, RRC Release will always result in UE going to inactive state and will need a new RRC Connection Req/Setup.

[@coolmunzir]

Any plans of video on Random Access Procedure and Impact of Cell Radius on LTE Intra RAT Handover specially the fact what actually goes down when you increase Cell Radius and LTE Intra RAT Handover improves

[@OurTechPlanet]

Yes, this will be covered soon as well!

[@Bayburt2569]

Many Thanks, bro

[@OurTechPlanet]

You are welcome!

[@ahmedal-ansi328]

thank you for your information I have one question what does mean ERAP failures due to no radio resources ? also if you can tell types of these radio resources

[@OurTechPlanet]

Failure due to radio resources means that one of the radio resources required to admit a new UE are not available. For instance if PUCCH resources are fully occupied by existing UEs then a new UE can get this failure based on implementation on the eNB side.

[@mohammadabdulkaderchowdhur7577]

Awsome! want more!

[@OurTechPlanet]

Thanks :)

[@arunztemishra]

Very good explaination.one small query how to separate bundling of rrc reconfiguration & security mode.is it possible through parameter changes.or something need to do at MME end.

[@OurTechPlanet]

Yeah this is possible in some vendors with RAN parameter changes on eNB. However, it is not done as that increases access latency.

[@ankitsinghal4551]

@@OurTechPlanet Can you suggest the RAN parameter vendor wise , not able find related parameters.

[@sam-1196]

can you explain why the call flow has to go though all this steps

[@OurTechPlanet]

The call flows are specified by 3GPP.

[@sam-1196]

@Our Technology Planet yeah it is specified by 3gpp but I think it would be more clear if you could mention why we have to go through all this in order to set up call.

[@Holly_Quran.]

Many Thanks to you..

[@OurTechPlanet]

You are welcome!

[@nylagant3815]

Thank you very very much bro

[@OurTechPlanet]

You are welcome!

[@wellylhakim3619]

Thnanks for the video

[@OurTechPlanet]

You are welcome!

[@nadeemparkar8499]

Can u make videos on coreset,ssb and beamforming nr in nsa if possible.

[@OurTechPlanet]

Sure, I will add them to the list soon. Meanwhile, you can go through the following video which explains beamforming for NSA kzbin.info/www/bejne/e3XGl56bnMh8ftU

[@nadeemparkar8499]

@@OurTechPlanet , thanks

[@ashishrai1169]

superb

[@OurTechPlanet]

Thanks 🤗

[@moorthyselva]

Can’t be more simpler.. Good One Ali. Thanks for the video . During all this failures how do we know that UE has not received the info from eNB or eNB has not received the message from UE

[@OurTechPlanet]

From RAN KPIs, there are estimations possible but we cannot be definitely sure - which is why it comes down to analysis by process of elimination or some times it requires traces/CHRs for verification.

[@moorthyselva]

@@OurTechPlanet Thanks

[@erinmiracel4847]

thanks man

[@OurTechPlanet]

You are welcome!

[@renandesouza724]

What about RNL fails in ERAB?

[@OurTechPlanet]

The radio failures explained in this session fall under RNL category

[@kipkoech2010]

What about TNL Failures@@OurTechPlanet

[@georgioskarouzos7418]

If a Ue (in idle mode) performs TA update and then returns to idle mode, it is not necessary to establish default EPS bearer. Correct ? Thank you

[@OurTechPlanet]

Yes, it is not a necessity to establish the default bearer for a TAU.

[@cresirj6238]

I think that the INITIAL UE CONTEXT FAILURE shall be sent from the eNB to the UE soon after it does NOT accept the RRC CONNECTION RECONFIGURATION and sends an RRC CONNECTION REESTABLISHMENT REQUEST

[@OurTechPlanet]

Initial Context Setup or Failure is a S1 message. It should be sent from eNB to UE

[@NitinDIXIT-i2n]

Kindly make a video on Muting KPI

[@DignuVignu]

Sir, Please make one video for UE redirection.

[@OurTechPlanet]

Ok, I will work on it as well!

[@Addicted2wowlulz]

Thank you for your lesson! Have a small question on the ERAB Failed Establishment due to "MME" , when its caused by Radio quality is it due to both UL / DL or only UL ? Thanks again!

[@OurTechPlanet]

Usually DL failures are recorded by eNB so eNB will know that the UE has experienced an RLF and thus, it will release the context itself. But in UL, the eNB might not be aware that the UE has experienced RLF and thus, the MME tells the eNB about the RLF via context release. So in short, failures due to MME are related to uplink issues or issues that the eNB might not be able to monitor.

[@jamesrandazzo5850]

really helpful

[@OurTechPlanet]

Thanks! Glad to hear that :)

[@japantaiwanlndiaaaradhyavo8613]

Hi Ali , While explaining the cause issue over No response from Ue , your suggestions is to disable the adaptive scheduling ? May i know which features are you talking about in Ericsson system ?

[@OurTechPlanet]

Usually we do not talk about vendor specific details and we strive to keep the content vendor agnostic. So, I can only give you a hint that various vendors have features that can vary SR periodicity based on load or QoS characteristics. The ones that can create a change during ERAB setup might be the ones causing this problem.

[@japantaiwanlndiaaaradhyavo8613]

@@OurTechPlanet Ali.. Thanks. Understood your concern , Audiance already demand you to plan vedio over adaptive scheduling indicators . Appreciate if you do so. Well regarding Variable SR and CQI periodicity features is already turn off but still many erab failures occurred because of no responce from UE as a RRC reconfiguration complete , I think to extend trrc reconfiguration at enb will help to get rid from this problem ? What u think

[@OurTechPlanet]

@@japantaiwanlndiaaaradhyavo8613 If you have found out that the issue is related to No Response then it can be typical coverage issue as well. You can try extending the RRC Reconfiguration timer as well but usually I have seen little gain from it - unless it is set to a very low value.

[@japantaiwanlndiaaaradhyavo8613]

@@OurTechPlanet Thanks for your feedback Ali.

[@m.karthikeyan6482]

And Please post also Event analysis

[@OurTechPlanet]

Sure, will add to the list! :)

[@Amitgau]

Thanks

[@OurTechPlanet]

You are welcome!

[@m.karthikeyan6482]

Please post RSRP calculation in 5G and 4G.

[@OurTechPlanet]

Have a look at this session, you might get an idea kzbin.info/www/bejne/oprbk5R_erWaorM

[@m.karthikeyan6482]

@@OurTechPlanet ❤️👍

[@javierk4913]

Where are SRBs and DRBs??

[@OurTechPlanet]

DRBs are setup during the ERAB Setup. The RRC Reconfiguration carrying the QoS details of the bearer sets up the DRB for the UE. Similarly, the SRBs are part of the RRC such that the SRB0 is setup during RRC Setup and then SRB1 during RRC Reconfiguration while SRB2 during NAS.

[@coolmunzir]

Can you summarize negative impacts of reducing SR periodicity

[@OurTechPlanet]

Lower SR interval can reduce latency but it might also impact PUCCH capacity. Although pre-allocations usually reduce SR based allocations significantly.

[@coolmunzir]

@@OurTechPlanet just to make the customer understand, impact on PUCCH Capacity meaning per SR requesting instance (after reducing periodicity) more UEs will send SR now (here assuming that Pre-Allocations feature is disabled) and it can also increase noise floor as well

[@pouriasoltani4096]

Great

[@OurTechPlanet]

Thanks!

[@giacomocroce5905]

Thanks

[@OurTechPlanet]

You are welcome!