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What are the step by step signaling procedures of the UE immediately it is switched ON?


#1

What are the step by step signaling procedures of the UE immediately it is switched ON?

Note: this is a transcription from telecomHall Facebook group: https://www.facebook.com/groups/telecomhall/permalink/1285224831497181/


#2

i) UE is Off
ii) Power On UE
iii) < Frequency Search >
iv) < Cell Search > : Normally a UE would find multiple cells in this process
v) < Cell Selection >
vi) MIB decoding
vii) SIB deconding
viii) < Initial RACH Process >
ix) < Registration/Authentication/Attach>
x) < Default EPS Bearer Setup >
xi) Now UE is in IDLE Mode
xi) <(If the current cell become weak or UE moves to another cell regisn) Cell Reselection>
xii) <(When Paging message comes or User make a call) RACH Process>
xiii) < Setup Dedicated EPS Bearer >
xiv) Receive data
xv) Transmit data
xvi) (If UE power is percieved too weak by the network) Network send TPC command to increase UE Tx Power
xvii) (If UE power is percieved too strong by the network) Network send TPC command to decrease UE Tx Power
xviii) < (If UE moves to another cell region) Network and UE perform Handover procedure >
xix) User stop call and UE gets into IDLE mode