MME is also involved in bearer activation and its deactivation procedures, to its task also belongs choosing the SGW for a UE in process of initial attach and when the intra-handover take place which involves Core Network (CN) node relocation.
It is responsible for tracking and paging procedure including retransmissions, and also for idle mode of User Equipment (UE). MME is the key control node for LTE access network. Let's have a closer look at three main packet core elements of LTE network. So maybe the best way of starting anything is to start (writing) from the beginning. Now when I have to start writing, I'm looking deep into back of my skull, to figure out with what I have my first LTE-like problem.
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