| 摘要 |
PURPOSE:To prevent radio interference by making the resending timing of each terminal equipment different in a system which transmitting pieces of information from many terminal equipments, decentralized at respective places, to a center station over a one-circuit radio channel. CONSTITUTION:When information is detected by a detecting circuit 2 at a terminal equipment, a transmission control circuit 3 actuates a transmitting circuit 4 to transmit the information to a center station and also actuates a timer 6. The center station, when receiving the information sent from the terminal equipment accurately, sends an answer signal back. On receiving the said answer signal, an answer signal detecting circuit 8 stops the clocking operation of the timer 6. If the answer signal is received, the time-up operation of the timer 6 actuates the transmitting circuit 4 again to resend the information and the timer 6 is actuated to restart the clocking operation. The time-up point of the timer 6 of every terminal equipment is made different. |
