A method for exchanging, between a mobile terminal and a base station, system information via a broadcast control channel (BCCH), which is a logical channel between a radio link control (RLC) layer and a medium access control (MAC) layer, and a broadcast channel (BCH) and a downlink shared channel (DL_SCH), which are transport channels between the MAC layer and a physical layer. The method includes: receiving a block of first system information from the base station in a predetermined frame of the BCH; and after the block of first system information is received, receiving a first block of second system information from the base station in a predetermined frame of the DL_SCH configured to carry system information and other data, the first block of second system information including schedule information relating to a second block of second system information.