Apparatus and method for supporting roaming service in mobile broadcasting system

The present invention relates to a roaming method and system in accordance thereto in a mobile broadcast system, the roaming service method of the present invention is the first process, and the mobile station that the mobile station receives a service guide from moving the Visited SP the roaming area the the terminal based on the received service guide to a roaming request message for requesting the service-specific acceptable purchase item Home SP) the Home SP receiving the second process, and the roaming request message for transmission on the on the basis of the roaming request message, this located the fourth to the third step and, whether the Home SP of available roaming negotiated with the Visited SP, and a roaming service by the available range of negotiating the Visited SP the roaming availability and roaming services by the available range of transmission to the MS in It characterized in that it comprises the process. If the mobile broadcast system of the present invention receives the roaming request message from the predetermined terminal, and the Home SP to the terminal negotiates roaming availability and roaming services by the available range to the Visited SP, which on the basis of the roaming request message, wherein the negotiating the Visited SP for transmitting the availability roaming and a roaming service by the available range to the terminal, the terminal to verify the received roaming availability and roaming services by the available range, and receives the encryption key from the Home SP or the Visited SP It characterized in that it comprises. OMA, BCAST, roaming services