Method for transmitting system information from a base station BS, eNB to a user equipment UE, the method includes transmitting a system information SI within a period p, which system information comprises a first part of information MIB, wherein the first part of information comprises an identifier ID, which identifier identifies a modification status of the first part of information MIB, and adapting a boundary b upon which the period p terminates, and upon which a modified system information SI is valid, wherein adapting a boundary b is carried out based on the modification status of the first part of information MIB.