A method for system information (SI) acquisition by a user equipment (UE) in a wireless communication network is disclosed. The SI comprises minimum SI and other SI. The method includes receiving the minimum SI from a base station, the minimum SI having an area identification (ID), requesting for the other SI from the base station when the area ID is different from a stored area ID on the UE, where the area ID is assigned to at least two cells in the wireless communication network. The method also includes requesting for at least one updated parameter of the other SI from the base station when a value tag in the minimum SI is different from a stored value tag on the UE.