If there is data/call for the UE, SGW sends DL Data Notification to MME, MME sends S1AP Paging message to all the eNodeBs for the given TAI list and finally ENodeB broadcast Paging at DRX interval.
Now UE receives the Paging message and moves from RRC/ECM-Idle state to RRC/ECM-Connected state.
Does UE recalculates PCI again, then reads MIB and SIB1,2 before sending RACH Preamble ?