发明公开
- 专利标题： Communication control method in network system based on duplex loop transmission system
- 专利标题（中）： 在双面环传输系统的通信控制方法
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申请号： EP96119444.6申请日： 1996-12-04
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公开(公告)号： EP0841778A3公开(公告)日： 2001-01-17
- 发明人: Takahashi, Toshiya
- 申请人： MITSUBISHI DENKI KABUSHIKI KAISHA
- 申请人地址： 2-3, Marunouchi 2-chome Chiyoda-ku Tokyo 100 JP
- 专利权人： MITSUBISHI DENKI KABUSHIKI KAISHA
- 当前专利权人： MITSUBISHI DENKI KABUSHIKI KAISHA
- 当前专利权人地址： 2-3, Marunouchi 2-chome Chiyoda-ku Tokyo 100 JP
- 代理机构： Ritter und Edler von Fischern, Bernhard, Dipl.-Ing.
- 优先权： JP23887296 19960910
- 主分类号： H04L12/423
- IPC分类号： H04L12/423
摘要：
A network manager, when a transmission is requested from any FA equipment under control by the network manager, sets a flag indicating a loop direction for transmission in a transmission frame and transmits the transmission frame to other stations, and when network controllers receive the transmission frame with a flag indicating the loop direction set therein, the network controllers check whether the loop through which the transmission frame was actually received is the same as that indicated by the flag in the received transmission frame or not, and if it is determined that the loop through which the transmission frame was actually received is different from that indicated by the flag above, the network controllers send the transmission frame including an error report indicating the loop direction to the network manager.
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