User equipment and base station participating in a system information acquisition procedure

An integrated circuit configured to control operation of a user equipment, the integrated circuit comprising:

• receiving circuitry, which in operation, receives a minimum-system-information message from a first radio base station controlling a first radio cell of a mobile communication system, wherein system information for the first radio cell that can be acquired by the user equipment is carried within the minimum-system-information message and one or more additional-system-information messages, the minimum-system-information message including system information for accessing the first radio cell and including at least one system information index, each system information index being associated with one of the additional-system-information messages,
• wherein the system information index comprises a value tag and an area pointer, the area pointer pointing to an area, and
• processing circuitry, which in operation, determines whether the additional-system-information message stored in the user equipment is associated with the same value tag and the same area as indicated by the system information index received in the minimum-system-information message, and
• if the determination is positive, the processing circuitry determines that system information included in the stored additional-system-information message is applicable to the first radio cell,
• wherein the minimum-system-information message comprises one system information index per additional-system information message.