| 摘要 |
PURPOSE: A method for preventing successive data collision on a network is provided so that efficiency of the network can be improved by preventing consecutive data collision, by changing a backoff time corresponding to a count value of a priority counter, maintaining a standby mode for the backoff time, and re-transmitting the data. CONSTITUTION: The first terminal confirms generation of data collision. When data collision is not generated, the first terminal finishes data transmission(ST1-ST3). When the first terminal receives data from another terminal in the data transmission, the first terminal recognizes it as data collision. The first terminal transmits a jamming pattern, detects a signal from a switching hub, obtains a count value of a priority counter, multiplies the count value by a slot time number, and decides a backoff time(ST4,ST5). The first terminal confirms whether data collision is consecutively generated sixteen times. When the sixteenth data collision occurs, the first terminal stops the data transmission(ST6,ST7). When the sixteenth data collision does not take place, the first terminal maintains a standby mode for the backoff time, and automatically performs the re-transmission of the data(ST8). When the switching hub receives the data from the first terminal, the switching hub detects the jamming pattern. If the jamming pattern exists, the switching hub transmits the jamming pattern and the slot time number. It is thus possible to prevent consecutive data collision in the data transmission.
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