Patent ID: 7801101

Claim:
A forward link rain attenuation compensating apparatus using a physical layer adaptive transmission frame scheme over one carrier in an interactive satellite communication system, comprising: a resource managing means for managing limited resources of a central station and mobile stations which transmit and receive data through a satellite network, the resource managing means being coupled to an external Internet service provider; a transmitting data format converting means for converting data transmitted from the central station to the mobile stations into Moving Picture Experts Group (MPEG)-2 transmission stream (TS) packets; a forward modulating means for modulating data outputted from the transmitting data format converting means according to forward link satellite standards and outputting modulated signals, the forward modulating means supports a plurality of different transmission methods and transmits the modulated signals on the one carrier; a backward demodulating means for converting a backward signal received from the mobile stations into baseband signals through demodulation and channel decoding and for outputting the baseband signals, the baseband signals being in the form of MPEG-2 TS or ATM cells; and a receiving data format converting means for converting the baseband signals outputted from the backward demodulating means into Internet Protocol datagram, wherein the forward modulating means uses one of the plurality different transmission methods based on information on the mobile station, wherein the resource manager checks if there are available resources when a user logs in, allocates required resources, maintains a condition of optimum resource allocation until resources are requested additionally, discriminates mobile stations of rain attenuation by utilizing data on receiving signal intensities of the mobile stations on line, and performs control so that data to be transmitted to the mobile stations can be transmitted in pre-determined transmission methods by transmitting the data on the mobile stations to the transmitting data format converting means, wherein the transmitting data format converting means keeps data on transmission classes, which include a rain attenuation class and a clear sky class.