The present invention relates to ranging response message generating and processing methods that can reduce overhead in a wireless portable Internet system. A method of generating a ranging response message according to an exemplary embodiment of the present invention includes: adding to the ranging response message a first field indicating the number of responses for CDMA codes included in the ranging response message and received from terminals; adding to the ranging response message second fields indicating ranging code attributes as the responses for the CDMA codes by a value of the first field; and adding to the ranging response message a plurality of third fields indicating transmission parameter adjustment values corresponding to the individual second fields.