Patent ID: 7167449

Claim:
A communication terminal device for generating a frame by concatenating a plurality of packets obtained from streams, and for transmitting the generated frame, the device comprising: a packet classification section for classifying the packets by stream types and destinations; a packet accumulation section for accumulating the packets classified by the packet classification section, so as to be separately stored based on classification by the stream types and the destinations; a QoS control section for determining a transmission start requirement of at least one packet stored in the packet accumulation section based on a QoS parameter which defines a transmission quality of a stream; a transmission control section for determining whether the transmission start requirement is satisfied; a framing section for generating the frame by concatenating the packets accumulated in the packet accumulation section if it is determined by the transmission control section that the transmission start requirement of the at least one packet is satisfied; and a transmission section for transmitting the frame generated by the framing section to a destination communication terminal device.