Provided a method for generating/allocating a temporary address in a wireless broadband access network, a method for allocating radio resource based on the same, and a computer-readable recording medium recording a program for realizing the methods. The method for generating the temporary address in the wireless broadband access network, includes the steps of: receiving a router advertisement message in a portable subscriber station; acquiring service flow identification (ID) based on a temporary address allocation guidance parameter of the router advertisement message in the portable subscriber station; and generating a wireless broadband Internet (WiMAX/Mobile WiMAX) temporary address based on the service flow ID in the portable subscriber station.