| 摘要 |
PURPOSE:To prevent the reception processing of an ACK signal at a transmission station from being increased even when the ACK signal representing that each reception station is normally received is returned from each reception station. CONSTITUTION:A transmission station 1 includes repeater station designation information to designate reception master stations 31,41 as repeater stations into a transmission data and sends the result to each of reception stations 31-33. The reception slave stations 32,33 receive the transmission data and when the data is normally received, a repeater station (in this case, the reception master station 31) closest to the station 1 is selected based on relay designation information included in the data and the ACK signal is returned to the repeater station. The reception master station 31 being the repeater station returns the ACK signal representing it that its own station is normally received and the ACK signal from the reception slave stations 32,33 to the transmission station 1 altogether. |
