| 摘要 |
PURPOSE:To attain equitable communication by transmitting a transmission continuance request signal if the transmission is not completed in a period or the right of transmission is not acquired in a loop transmission system comprising a synchronizing station and plural node stations. CONSTITUTION:The synchronizing station transmits a synchronizing signal F permitting synchronizing communication in a prescribed period T0. When the passing of synchronizing communication signal blocks B1 and B2 is finished, the synchronizing station transmits a trigger signal M permitting asynchronous communication. If the asynchronous communication signal block B3 passes on the way of passing of the signal block B4 and a communication enable time T1 comes around, a station transmitting the signal block B4 transmits the transmission continuance request signal M. Since the synchronizing station trnsmits a transmission restart signal in the next frame before the trigger signal M, the remaining signal block B4 is transmitted. |
