LTE Attach Part 1: Goals of LTE Attach

[@sriranganayakulu8513]

It is high time we want a 5G lecture series. Irfan Ali sir is hands down the best instructor in the world on 4G.

[@Dododawa]

Irfan Ali is indeed an excellent teacher, he is very knowledgeable and the pace of his delivery is very effective. I give him TWO THUMBS UP

[@raghavsamba]

Beautiful explanation....No materials till date told about TEID....Lots of love thank you ❤️

[@ramgollakota1225]

A very clear and concise explanation. Nice sense humor as well!

[@Middlepathosho]

Once again, best on youtube.

[@srikrishnarr6553]

very crisp explanations Mr.Irfan .Hope you and your family are healthy in these Corona days ...Pls share info on VOLTE and 5G as well ...thanks a ton for your works

[@manojpradhan1487]

superbly explained concepts through diagrams much appreciable.

[@caruruskun]

the best lte attach explanation i have found ,thank you very much !!

[@ahmadabuazoum6015]

Thank you sir for sharing this knowledge for everyone

[@sagarprasad3625]

Thanks for that wonderful explaination!

[@lt_cristian]

The explanation is very comprehensive and logic, thank you very much!

[@TheChinku83]

Nicely explained..... have you explained the cell search procedure?

[@mohideenpitchai5437]

Hi very nice explanation . Thank you so much

[@praveepm]

Nice video....Could you pls share the link for the video S1-MME(S1AP) Primer

[@shreeharidhat1073]

Hi Irfan Ali,
That is very informative video about LTE Attach process. I have some questions
If eNB is on 10.40.50.0/24 subnet and Mehmet is on 10.40.40.0/24 subent, then
How does eNB know packet is destined for Mehmet? Or How does it route the packet to Mehmet on its IP address over DRB?
Is the IP address to Mehmet being assigned by PGW dynamically? If possible can you explain how is that IP address getting assigned to Mehmet?

[@IrfanAli-nz7mb]

The eNB does not look inside IP packet of the UE at all. During the attach procedure GTP-U tunnel is setup from PGW to SGW and from SGW to eNB. For each UE there is a different downlink TEID on the SGW-> eNB GTP-U tunnel. Any packet that comes on this TEID is destined for Mehmet and eNB will send this to Mehmet. The IP@ allocated to PGW can either be dynamic or static if the HSS provides this IP@ for the UE via the MME.

[@hafizgasimov333]

Selam.. Tesekkur ederiz, sonda bir turk cikti bunlari anlatacak.

[@havvaesimakdag1608]

aksanı türk değil gibi, sadece isimler Türkçe sanki :D

[@quynguyenquang8974]

Very userful. Many thanks for your sharing

[@mIbrahim1981]

Excellent explanation Irfan .. Can you give us as well an explanation for PCRF/OSS/DPI packet core integration

[@kundankumarsingh2606]

Can u please tell how enodeb know that which MME to connect???

[@vishwasv6458]

Very helpful 👍

[@LIFE-hm8wp]

How a Enb gets IP vlan once powered on?

[@likhithavommi9094]

Hi, Thanks for very clear explanation...
Can you plese clarify, how ayesha would know the ip address of mehmet(ip_m), as ayesha may be having only phone number of mehmet.Which module would handle that

[@IrfanAli-nz7mb]

Hi Likhitha, Ayse finding Mehmet's IP address can occur in various ways which are specific to the application that Ayse is using. For example, for Skype, there is registry that keeps track of IP_m and provides it to Ayse's skype client. Typically this is the scheme used. This is all done in the application itself and Ayse does not need to enter IP_m or even know about IP_m.

[@pchillar]

Hi Irfan please upload on VoLTE as well

[@jryan077]

Hello Irfan very good job , yes please if u can please upload VoLTE too , it could be so useful ;-) thanks so much

[@pawansingh-ub2ej]

Beautiful explanation..
I have one question. How p-GW knows the ip address of Mehmet. I mean how Mehmet ip address got registered at P-GW?
Thanks in advance

[@sunilkumarkumar-rv1dt]

Hello Sir, Please make similar videos on 5G NR. NSA thanks

[@intertonyblue]

Ayse, Ayce ecoute moi