Data transmitter device, repeater device, data transmission/reception device, and data communication method

摘要

A data receiver ( 201 ) or gateway ( 203 ) notifies a data transmitter ( 202 ) of error conditions in the data receiver ( 201 ) or gateway ( 203 ) via networks 1 ( 204 ) and 2 ( 205 ). According to the error conditions, the data transmitter ( 202 ) transmits data at a packet length corresponding to the error rate even for the higher level protocol common the networks 1 ( 204 ) and 2 ( 205 ), as well. Thus, the fraction of packets lost can be reduced in the higher level protocol common to the networks 1 ( 204 ) and 2 ( 205 ).