SELF-CONTROLLING METHOD AND DEVICE OF DISTRIBUTED PRIORITY COMPETITION

摘要

PURPOSE:To prevent the competition for a shared device without a priority controller, by using a data line and an inhibit line commonly when the shared device is used by other plural devices, and performing self-control in a specific time in each one of plural devices. CONSTITUTION:A central processing device 15 or the like as the shared device and plural terminal devices TD1-TDn are connected by a transmission line 10, and each of devices TD1-TDn consists of a transmission line controlling part 100 and a transmission controlling part 200. The transmission line 10 consists of a data line and an inhibit line, and they are connected to a connecting part 65 of the controlling part 100 of each one of devices TD1-TDn. A transmission driver 450 and a reception comparator 60 are connected to the connecting part 65, and the driver 450 is connected to a modulating part 400, and the comparator 60 is connected to a demodulating part 50. The transmission and the reception are controlled by a transmission right controlling part 300 which is connected to the controlling part 100 by a transmission request signal RTS and a transmission permission signal CTS, and devices TD1-TDn perform the self-control to determine the priority of the system.