A method of informing a user equipment about access barring includes the steps of: determining a bit set for the access barring, wherein the bit set includes at least two bits and discloses at least whether the access barring is on or off; placing at least a first bit of the bit set in a starting message, the starting message being one the following messages: a master information block message or a paging message; and transmitting the bit set in a message set via radio interface to the user equipment, the message set including at least the starting message. The starting message may disclose whether the remaining access barring information need to be read.