| 摘要 |
PURPOSE:To reduce the generation factor of system breakdown and to improve the reliability of a transmission system by setting the same direction between two transmission lines and connecting each transmission controller to the transmission controller of another loop in a bidirectional transmission enable way for each station. CONSTITUTION:Transmission controllers C10-Cn0 and C11-Cn1 set opposite to each other on unidirectional loop transmission lines L00 and L11 which perform transmission in the same direction are connected to each other by bidirectional transmission lines L110-Ln10 and L101-Ln01 respectively. In case the transmission is improssible with the line L00, the transmission is shifted to the corresponding controller C21 from the immediately preceding controller C20 via lines L210 and L201 and can be sent back to the line L00 from the controller C41 on the line L11 corresponding to the subsequent controller C40 on the line L00 via the line L11 and lines L410 and L401. This reduces the generation factor of the system breakdown and improves the reliability of a transmission control system. |
