LTE: How does an UE monitor radio link with its serving cell ?

Question

When an UE completes cell search procedure, it has to monitor its link to eNodeB. How it does and what are the component or layers involved for this activity ?

Answer 1

Hello,
The two states of UE,RRC_IDLE and RRC_CONNECTED Used to monitor the system information.
if UE in RRC _IDLE it does

UE Control mobility
PLMN Selection,cell (re)selection.
By Using DRX Monitor the paging,sys info xchange

In RRC_Connected it does

network Control mobility
data transfer to/from UE
Acquire SYS info,
Perform measurements and give feedback to n/w
monitor paging,sys info chage,( ETWN / CMAS if UE Supports)

from this way UE always monitor the system information any take the resources if need