| 摘要 |
PURPOSE:To avoid a congestion state of an ACK of a broadcasting mode and to average a series of broadcast processing time, by applying a system that sends back the ACK on the basis of the time slots of a prescribed order. CONSTITUTION:A carrier detecting multiple access CSMA/CD system with detection of collision is formed with a data bus 1 with its both terminals short- circuited by a terminator 2 and plural stations 5 connected to a transceiver 3 via a transceiver cable 4. When a transmitting request is delivered from a user device 16 of the station 5, the idle state of the bus 1 is checked by a transmitting logical circuit 10 and via the transceiver 3. Then the data stored in a transmitting buffer 13. In this case, the generation of collision is detected by a collision detector 8 of the transceiver 3, and a collision counter 9 counts the intervals. Then a retransmission is carried out with the counted intervals. In a reception mode a receiving logical circuit 11 selects only its own address and transmits the data to a device 16. Thus a series of broadcasting time is averaged. |
