Method for supporting coexistence considering while subchannel allocation in a broadband wireless access system

A method for supporting coexistence in a mobile station for supporting a coexistence mode of WiMAX and secondary wireless communication system while considering subchannel allocation, the method comprising:

• at the mobile station, transmitting a registration request (REG-REQ) message including coexistence capability information to a base station;
• receiving a registration response (REG-RSP) message comprising information about the support of the coexistence mode in response to the registration request (REG-REQ) message;
• turning on the second wireless communication system;
• requesting a band adaptive modulation and coding (AMC) for adjacent subcarrier permutation to a base station by transmitting first coexistence information;
• and
• requesting a release of the adjacent subcarrier permutation to the base station by transmitting second coexistence information, if the secondary wireless communication system is turned off.