Here comes the big one: The LTE Initial Attach
messages messages everywhere...
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| LTE initial Attach |
Message Box in Blue Color: NAS messages
Message Box in Red Color: P-GW and PCRF interaction
Looks like the image is not clear enough. The solution is to click on the image and then zoom in. thought of mentioning the workaround :-)
The call flow is self explanatory. This procedure also gives the default bearer setup during the Initial Attach procedure. Bearers will be covered in a separate post.
Can't read it.
ReplyDeletePicture is not clear.
Thanks.
I have mentioned the workaround. Click and Zoom in
DeleteExcellent knowledge sharing...a goog introduction to LTE.
ReplyDeleteExcellent callflow diag to get a birds-eye view of the basics!
ReplyDeleteThanks!
ReplyDeleteHello Arjit,
ReplyDeleteGood work! Very usefull to undestand overall LTE callflow.
Really it's very clear and easy to understand.
ReplyDeletenice job!!
ReplyDeleteIt's easy to understand.
Really it's very clear and easy to understand.
ReplyDeleteHi Arijit,
ReplyDeleteJust wondering how S1-Setup can start before RRC Connection Request and I hope it is not Mobile Terminated type scenario.
Seems some kinda message alignment issue.
S1-Setup has nothing to do with RRCconnReq. S1-Setup is the link between eNB and MME.
DeleteIt is MO-Signalling as the Title suggests -Initial Attach-.
Hi Arjit,
ReplyDeleteCould you please describe NAS....
Regards,
Sangit Kumar
Hello Sangit, this is a very open ended query.
DeleteSee, for couple of scenarios; there is need for EPC to talk to the UE directly. But in between the UE and EPC, eNB exists. Hence, for directly talking to each other NAS is used. eNB doesn't care for these kind of messages and simple acts as a relay agent.
Hope this is what you were looking for!
Excellent way of presenting .. Good for begineers in this domain .. can u suggest me some books for learning LTE ? Easy language book
ReplyDelete