This is one of the best LTE training channels ever, it has to have many many subscribers
@davedamerjian6035
11 ай бұрын
Fantastic set of videos as I just posted comment for the GTP Primer video. One thing I will say with regards to the DHCP used to give out UE IP address at end of this video, while maybe that it part of the spec, that is NOT the way I see our Cisco customers do it, every instance I see is the PGW's Create Session Response giving out the UE IP address (IPv4 and/or IPv6).
@aniruddhsrinivas4552
6 жыл бұрын
This video is indeed an impeccable explanation of LTE Attach procedure one could ever find and understand. Thank you Irfan! Looking forward for more such videos.
@ramgollakota1225
3 жыл бұрын
have been struggling with some of these concepts, and Irfan sir you have given lot of clarity and peace of mind to me.
@lt_cristian
4 жыл бұрын
The finest LTE call flow explanation that I've seen, very fluent and compressive! Congratulations
@swarnban8634
Жыл бұрын
He really rocked at *2.04*
@seanwells1672
5 ай бұрын
I could kiss you for creating this! Been pulling my head reading online till I found your videos.
@mustakimdhanse1407
4 жыл бұрын
The best & easiest explanation I have ever seen. Keep it up & keep posting more videos.
@chinmaymarathe53
6 жыл бұрын
Best LTE explanation I have ever seen. Really Appreciated
@jobanpreetsingh3880
Жыл бұрын
Please create the series for 5g too. You are a life saver
@suman2110
7 жыл бұрын
Really It's a good explanation from end to end, Thank you, Ifran Ali.
@atahanaltuntas6164
2 жыл бұрын
irfan, you are the best:))
@muditgoyal6910
6 жыл бұрын
Thanx a lot Irfan. Such a perfect explaination, even a newbie like me could understand the explaination easily.
@shivamkasaudhan9850
4 жыл бұрын
Irfan Sir.. Thank you for the Best #LTE Session Rocks
@chotonrahman5959
4 жыл бұрын
Thank you so much, one of the best trainings I've ever seen...
@IntroMaster2216y
2 жыл бұрын
you are my hero
@manav6502
2 жыл бұрын
wow this is impeccable explanation, really helpful!!
@fatmaghandour9427
7 жыл бұрын
Perfect explanation of attach procedure, thank you !
@IrfanAli-nz7mb
7 жыл бұрын
You are welcome.
@abhishek-xv5ow
2 жыл бұрын
Very Concise and clear..Thanks a Lot :)
@rathig007
2 жыл бұрын
This training is really good, can avoid random names like Ashok in between to keep it professional and can use the actual names to keep the context intact.. Thanks :)
@abhishek-xv5ow
2 жыл бұрын
But Ashok is not a random Name :)
@adamrhaman5833
6 жыл бұрын
Great video. One suggestion. Complete the messaging first and then go details inside msg.
@minkeshgupta1422
3 жыл бұрын
great explanation helped alot thanks
@harrison5758
2 жыл бұрын
Thanks for your sharing!
@abuismael4763
7 жыл бұрын
Thank you it is perfect and clear explanation
@arcert6743
3 жыл бұрын
Hello Sir, you have explained the details in an excellent way. This is very helpful. Thank you and appreciate very much. I am looking for understanding on LTE roaming scenarios or call flows. Can you please guide me ? I have searched a lot on internet but didn't find any good info.
@SachinSharma-vf5xh
4 жыл бұрын
Authentication process goes like this: both the HSS and UE has a (K=master key) key which is used to authenticate the UE as well as the network, the MME asks (sends authentication token) both HSS and UE to derive a specific key using K key and sent it to me to which UE replies with RES and HSS with XRES (expected response), (since both have the same K key the RES and XRES should match), the MME compares the responses, if match UE is authenticated, else its an imposter UE can derive the authentication token using the K key as well so that it can make sure the network is valid
@KamranKhan-hv5ti
4 жыл бұрын
Excellent!
@amitsareen8326
6 жыл бұрын
Hi Irfan.....thanks for this information. I have a doubt. If IP address is not being used by the network (UE to PGW) then what is the need to transfer the IP address to the UE. P-GW can simply allocate the IP by himself (allocate the IP with SIAPTEID) thus saving resources in the signalling.
@juanky1007
5 жыл бұрын
what is the diference (talking about this messages call flow) between LTE Attach procedure and combined attach procedure?
@RuwanIndikaPrasanna
4 жыл бұрын
Great video !
@lehlagaremogadime7494
6 жыл бұрын
very informative
@HiteshKumar-bq8xy
6 жыл бұрын
Hello Boss, One question, IF I am doing a CSFB and I have given priority to GSM but TAC AC mapping is still in 3g LAC so how CSFB will perform means how MT CSFB to GSM will happen where MME will send 3g LAC to MSC ?
@sxndeepak
2 жыл бұрын
UE send UE id in connection req and NW respond same in setup if it did not match UE dropped it . this is not happen in CBRA ?
@mohiteric
5 жыл бұрын
Hi Irfan, can you explain a bit about SGW n PGW selection and DNS queries
@Santana198
7 жыл бұрын
Thanks for the in depth explanation. Had a few questions 1)Does not the Attach Accept message actually provide the UE with the IP ?
@IrfanAli-nz7mb
7 жыл бұрын
Standards allow options: (i) UE can request for IP address allocation via attach or (ii) IPv4 address allocation via DHCPv4. In case (i) IPv4 and/or IPv6 address is provided to the UE along with the attach accept message (the IP address is in the PDN Address IE of the ESM NAS message "Activate Default EPS Bearer Request" shown in Step 23 of the slide and not the Attach Accept message itself). In case (ii) UE will request IPv4 address via DHCPv4 after attach is completed. For most of the traces I have seen in the market, IP address is allocated using (i), i.e. in the activate Default EPS bearer request message sent along with Attach Accept message.
@Santana198
7 жыл бұрын
Irfan Ali Thank you!. Great videos...
@shahidHussain-ie4hh
2 жыл бұрын
Why HLR is HSS in EPC?
@temirlankessikov3345
2 жыл бұрын
How about PCC architecture included during initial attach
@shaikyaseen3210
3 жыл бұрын
Sir more Videos please
@anandhebbali4813
4 жыл бұрын
Hi Irfan, Could you please tell who are Mehmet and Ayse?
@simpsonmathew1361
3 жыл бұрын
Hi Irfan, What is the concept of SRBs in LTE. Why SRB is required in LTE? Thanks in advance
@IrfanAli-nz7mb
3 жыл бұрын
Signaling Radio Bearers are for sending control messages called Radio Resource Control RRC (please see the LTE Radio Primer series part 6-7) between UE and eNB. The RRC messages are grouped into two groups: (a) those that are sent early on and are not provided with RLC retransmission (SRB0), and (b) those that are provided with RLC retransmission (ack mode) (SRB1 and SRB2). SRB1 and SRB2 are used to differentiation priorities for messages, SRB1 are messages that require higher priority and these are direct messages between UE and eNB and SRB2 are lower priority and can take longer delays, which are NAS messages between UE and MME. Hope this answers your question.
@simpsonmathew1361
3 жыл бұрын
@@IrfanAli-nz7mb Yes. Thanks for the detailed explanation.
@bibhubehera649
6 жыл бұрын
Tysm :)
@joanlim5634
6 жыл бұрын
Hi Irfan Ali, is this the same for lte data?
@narenderreddy5031
5 жыл бұрын
Hi
@nitin007verma
7 жыл бұрын
Sir can we get this slides??
@IrfanAli-nz7mb
7 жыл бұрын
Hi Nitin. The slides are available at slideshare: www.slideshare.net/aliirfan04/lte-architecture-and-lte-attach
@vishalzacharias3732
6 жыл бұрын
hi sir can you tell me total how many call flows in LTE?
@vishalzacharias3732
6 жыл бұрын
can you give all call flows please
@shivamkasaudhan9850
4 жыл бұрын
Irfan Sir.. Thank you for the Best #LTE Session Rocks
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