Method for discretely indicating resource allocation information and a method for reducing load when indicating resource allocation information

A method for reducing a load when indicating resource allocation information in an Orthogonal Frequency Division Multiple Access (OFDMA) wireless network system, the method comprising the steps of:

• i) determining whether a resource allocation region is identical to a previous resource allocation region by means of a base station;
• and
• ii) transmitting information representing that the resource allocation region is identical to the previous resource allocation region without indicating resource allocation information if the resource allocation region is identical to the previous resource allocation region is allocated to the predetermined terminals.