The Paging procedure for the 5G systems is expected to be similar to the one in the existing LTE systems with some improvements, e.g., the RAN itself being able to initiate the Paging procedure.
PO & PF will be same as LTE.
The UE monitors one paging occasion (PO) per DRX cycle.
One Paging Frame (PF) is one Radio Frame and may contain one or multiple PO(s) or starting point of a PO.
For 5G,In multi-beam operations, the length of one PO is one period of beam sweeping and the UE can assume that the same paging message is repeated in all beams of the sweeping pattern and thus the selection of the beam(s) for the reception of the paging message is up to UE implementation. The paging message is same for both RAN initiated paging and CN initiated paging.
The UE initiates RRC Connection Resume procedure upon receiving RAN paging. If the UE receives a CN initiated paging in RRC_INACTIVE state, the UE moves to RRC_IDLE and informs NAS.