Classification and concatenation of packets through communication systems power lines.

communication terminal device to generate a frame by concatenating a plurality of packets obtained from streams of data and / or voice packet, and for transmitting the generated frame, the device comprising: a section packet classification for sort packages by types and destinations flow; a section packet accumulation for accumulating the classified packets by the packet classification section, so as separately stored based on classification by the stream types and destinations; a control section for determining a QoS requirement transmission start of at least one stored in the packet accumulation section packet based on the QoS parameter which defines a transmission quality of a stream; a control section transmission to determine whether the transmission start requirement of the at least one packet is satisfied; a frame forming section for generating the frame by concatenating the packets accumulated in the accumulation section if the section packet transmission control determines that the transmission start requirement is satisfied; and a transmission section for transmitting the frame generated by the framing section to a terminal destination communications device.