Patent ID: 8670368

Claim:
A broadcast retransmitting apparatus comprising: a demodulation unit which receives a broadcast which has been modulated at a first rate according to a first modulation method from a broadcasting station or a satellite, and demodulates the broadcast received from the broadcasting station or the satellite; a modulation unit which modulates the demodulated broadcast according to a second modulation method different from the first modulation method; a spectrum sensing unit which detects an available band from an idle band through spectrum sensing for retransmitting the broadcast modulated according to the second modulating method; and a control unit which retransmits the broadcast modulated according to the second modulation method to a plurality of surrounding apparatuses using the detected available band, wherein the control unit allocates a broadcast channel to the available band, determines whether the plurality of surrounding apparatuses request broadcasts of different channels to the broadcast retransmitting apparatus, and controls the modulation unit to modulate the demodulated broadcast at a second rate higher than the first rate to reduce occurrence of an error caused by broadcast transmission through a plurality of channels if it is determined that the plurality of surrounding apparatuses request broadcasts of the different channels.