Method and communication for power line communication

The communication method and apparatus using a relay device in the power line communication is disclosed. Power line communication according to the present invention (PLC) method is the final destination of the communication device of a data packet to be transmitted is without going through the relay apparatus comprising: determining whether or not direct communication is possible devices, direct the final destination of the communication apparatus on the data packet If the communication is available devices and transmitting a data packet to the communication unit the final destination of the data packet, and if the final destination of the communication apparatus on the data packet is not directly capable of communicating device for transmitting a data packet to the relay device It included. Because settings of the other station and the communication optimum relay path through the availability and selection of the access point whether the communication by the relay device when the performed intelligently and automatically without direct setting of the user, which may selectively utilize the repeater service maintain the quality (QoS) and may provide the convenience to the user.