System information transmission method and subframe structure

The present invention relates to a wireless access system, and to a system information transmission method, a subframe structure, and pilot structures. According to an embodiment of the present invention, a method for receiving system information in a wireless access system may comprise the steps of: receiving a network common information (NCI) channel, which includes system information common to a network, from a base station; receiving a synchronization channel, which is used to synchronize with the base station, from the base station; receiving a cell specific information (CSI) channel, which includes system information specific to the base station, from the base station; and decoding the network common information (NCI) channel and the cell specific information (CSI) channel by using the synchronization channel. Here, the network common information (NCI) channel may be transmitted using a first frequency channel, and the cell specific information (CSI) channel may be transmitted using a second frequency channel.