Apparatus and method of transmitting and receiving associated broadcasting contents based on heterogeneous network

PURPOSE: A device for transmitting and receiving associated broadcast content based on a heterogeneous network and a method thereof are provided to transmit additional content related to basic content through a communication network by a streaming method. CONSTITUTION: A transmission system generates a basic content stream about basic content(S300). The transmission system generates an additional content stream about additional content related to the basic content(S310). The transmission system transmits the generated basic content stream to a terminal through a broadcast network(S320). The transmission system transmits the generated additional content stream to the terminal through the communication network(S330). [Reference numerals] (AA) Transmission system; (BB) Terminal; (S300) Transmission system generates a basic content stream; (S310) Transmission system generates an additional content stream; (S320) Basic content stream(broadcast network); (S330) Additional content stream(communication network); (S340) Reproducing broadcasting content