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5G Call Flows (Session 1): How a 5G UE/Mobile performs Initial Access
One of the most complex area for beginners is to understand 5G Call Flows and Signaling procedures. 3GPP defines them but they are not easy to understand. So, in this video, I have explained the 5G Call Flows (NSA) in a simplified manner and I have also included the contents of some of the important messages to show what actually goes on between UE/Mobile and the 5G network during the 5G Initial Access or Network Entry procedure! Moreover, I have highlighted some of the important 5G KPIs in the end that will help the audience to correlate the 5G Call Flow & Signaling procedure with the 5G KPI itself. This is also one of a popular 5G Interview topic as well and many questions are asked from this Signaling Procedure.
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0:00 Start
0:50 5G Network Access Overview
3:13 5G Access Call Flow
3:57 5G B1 Threshold
6:45 5G Measurement Report
7:45 SgNB Addition Setup
8:57 How UE Gets The 5G gNB Configuration Info?
12:00 5G RACH Procedure
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5G NR Throughput Estimation – How much speed or data rate will I get on 5G?
https://youtu.be/Jz5g5sIU81U
VoLTE Capacity Planning and Dimensioning: A Dimensioning Cheat Sheet
https://youtu.be/PxZ2p2X7U5c
5G Applications: How Low 5G Latency Is Achieved For Major 5G Applications!
https://youtu.be/kIPCXRd1OMA
5G Frame Structure
https://youtu.be/nyzHkIpWFjE
5G Frequency and Time Domain Structure
https://youtu.be/NCC0XGvlLSg
5G Bandwidth Efficiency – How 5G uses Frequency Bandwidth more efficiently
https://youtu.be/f77ORkmC5Pg
For simplified 5G tutorial sessions, check out the complete playlist below 🙂
🌐5G Call Flows & KPIs
💡https://youtube.com/playlist?list=PL4OXTttOk9WhvApKwJBcZx0G4a2m8N-z6
Thank, one question here please, RRC Re-config messages containing 5G NSA cells info, is it sent to all devices or only 5G capable devices ?
Do you have 5G call flow etc on Udemy?
The way you explain in your videos, it makes very easy for me to understand. Thank you for your contribution. Stay blessed
You r a superstar Muhammad Ali Khalid
Very helpful! I would like to mention that although msg3 (Rrc connection setup request) between Ue and gnb (after endc setup) is considered RRc message, it is sent by the Ue directly to gNB and not via eNB.Do you agree with this?
"5G NR B1 threshold"? I tought 38.331 spec call it "xQrLvl" which is equivalent to SSB RSRP level in dB.
Maybe this B1 for NSA only. All this legacy approach is a nightmare of ProtocoloStack engineers, and headache for investors that need to keep army of PS.
https://www.youtube.com/@Tech_Wallah723?sub_confirmation=1
We need to make clear that this call flow is NSA.
👍
Thank you 🙂
FINALLY I UNDERSTAND SHORT EASY AND SWEET CALL FLOW. Thank you!
Well explained.
That was super cool.
Best part was the UE logs inclusion, that made the things real.
easy as it comes. Great
The best tutorial and explanation. You are the best
Thanks a lot for the detailed explanation.
It is crisp explanation. i've one doubt: -156dbm which spec is reference? please explain in detail ho to calculate RSRP and rSRQ w.r.t gNB. thank you.
Great work gents. Good luck
Excellent way of explaning!
please, why has SCG split been more preferred by industry vs. MCG split?
Perfect, thanks a lot.
🙏🙏🙏🙏🙏🙏💗
Thanks! Since the message "RRC Reconfig (NR Bearer)" carries all the configuration of the gNB, is there still a need for the UE to decode MIB, SIB1, and SI-messages of the gNB?
Perfectly clear! You made it so easy to understand. Thank you!
Nice video, very well explained. Thank you for creating such videos
Thank you Sir.
Your videos was very well explained.
I am watching your videos.
If you don't mind can I get this PPT ?
What happens if the RACH procedure fails?
1. Will the UE loose 5G connection?
2. Is data transmission to the UE started after sgNB addition success or RACH success?
3. Which KPIs will be impacted if there’s a RACH failure? only RACH SSR or sgNB drop inclusive?
4. If there is sgNB failure after RACH failure, will it be counted as a service drop?
TIA
Excellnt Work……………Can you make video on details 5G KPIs, Counter , solution and with patameters to be implement
Thanks very good explaining!! during lectures you had shared UE log.. which tool was used to captured log..
Beautiful and easy explanation over NSA 5G Call flow..
One Question , if UE doesn't support 5G BW ( suppose BW is 100 MHZ while UE supports only 60MHZ) , what will happen?
Hi, Thanks for sharing knowledge with all of us. Can you also please post some good video on URLCC specially MiniSolt understanding and how to implement minislot concept in my 5G Stack. Thanks for the help in advance.
Nice explanation.. in my network i am facing one problem….we have 2 5g bands 3.5 100mhz and 2.6 80 mhz… for example we have 2 neighbouring sites lets say site A(lte + 3.5 5g) and site B(lte and 2.6 5g) and ue is near site B and from site B lte when its start adding 5g many times its added site A 5g with bad coverage logically it should add site a 5g but he cant even on site A i define B1 threshold for 2.6 is 46(-110) and for 3.5 b1 threshold 56(-100) but still its adding 3.5 any suggestion to reduce that my aim it should add collocated 5g ..i am having nokia equipment even we have one priorty parameter ..even i gave high priorty to 2.6 but still its adding 3.5 5g band
Excellent…
Great