| 摘要 |
PURPOSE:To attain radio transmission with high reliability by applying control by timer supervision at the transmission of a terminal device so as to prevent simultaneous transmission by automatic transmission. CONSTITUTION:The radio system includes a radio fixed station 11, a controller 12 connected to a host computer, and plural radio terminal devices 13,14... connected to a radio line. The plural radio terminal devices are controlled by timer supervisory functions whose time settings differ from each other, the timer supervises an idle line set stage from the radio fixed station at transmission to shift the transmission timing. When the radio terminal device makes transmission, the timer supervises the idle line set, and when the idle line is set again, the transmission is made at first at that point of time. When the idle line is reset, the transmission is awaited until the idle line is set and it is supervised by the timer. The setting of the timer depends on each radio terminal device so as to prevent simultaneous transmission when the idle line is set. |
