According to one aspect of the present invention, disclosed is a method for transmitting a packet through network coding in a relay node. The method of the present invention comprises the steps of: receiving a first packet encoded by channel coding including Luby transform (LT) encoding and low-density parity check (LDPC) encoding from a plurality of source nodes; generating a second packet by performing network coding using an LT matrix on the received first packet; and transmitting the generated second packet to a destination node.
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