What is the difference between initial context setup request and erab setup request in s1mme interface?

CORE
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1

Hi guys!

What is the difference between initial context setup request and erab setup request in s1mme interface?

Are both for establishing s1u and drb bearers, what is difference?

Thanks in advance!

2

I hope this help:

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3

Thanks!
But it starts with “initial context setup request” message, and you labeled it with erab establishmeny.sometimes I see no initial context request but directly “erab setup req?”, what is the difference?
When RRC is removed, does the context also removed?
Is the term context referring to a link or a logical context on a node?

4

Update:

Initial context is the context on eNodeB, and when RRC and S1 signalling is terminated it is also gone.
eRAB can be more than one, but context is only one for a subscriber.

Above are the information I found, for your knowledge…