Why does UpdateLocation happen before CSR in Attach procedure, whereas the otherway round in TAU procedure?
I think Kumar is right here TAU is done in the registered state while Attach is a registration process itself.
I want to know combined attach procedure and how it is different between UMTS and LTE?
Several messages are exchanged between UE and network nodes (eNodeB and MME) during attach procedure. I want to know in which all stages timers are used to guard various sub procedures of LTE attach procedure.
Can any one explain me UE's initial attach procedure, i mean to say what happen when UE switched on and intermediate steps happens in between till it connect to network
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