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    • 8. 发明授权
    • Dual loop type data highway system
    • 双环式数据通道系统
    • US4416008A
    • 1983-11-15
    • US215842
    • 1980-12-12
    • Masahiro TakahashiTakuji HamadaHitoshi Fushimi
    • Masahiro TakahashiTakuji HamadaHitoshi Fushimi
    • H04L1/00H04L12/423H04J3/08
    • H04L1/0078H04L12/423
    • A dual loop type data highway system comprises a data highway having at least two loops for data transmission and reception, a plurality of data transmitting/receiving stations serially connected to the data highway and a control station serially connected to the data highway. The data transmitting/receiving stations each have means for detecting the beginning of a transmission cycle, one for each of the loops, and the control station has, one for each of the loops, means for detecting the end of the transmission cycle and means for permitting the transmission/reception of data between specified two of the data transmitting/receiving stations during the transmission cycle by polling, whereby an effective transmission rate is increased without considerable increase of hardware.
    • 双循环型数据高速公路系统包括具有用于数据发送和接收的至少两个循环的数据公路,串行连接到数据高速公路的多个数据发送/接收站和串行连接到数据高速公路的控制站。 数据发送/接收站各自具有用于检测传输周期的开始的装置,每个循环一个,并且控制站具有针对每个循环的装置,用于检测传输周期的结束的装置和用于 允许通过轮询在发送周期期间在指定的两个数据发送/接收站之间发送/接收数据,由此在不显着增加硬件的情况下增加有效传输速率。
    • 9. 发明授权
    • Loop type data highway system
    • 循环型数据高速公路系统
    • US4510494A
    • 1985-04-09
    • US395327
    • 1982-07-06
    • Sadao MizokawaTakuji HamadaHiroshi TomizawaHitoshi Fushimi
    • Sadao MizokawaTakuji HamadaHiroshi TomizawaHitoshi Fushimi
    • G06F13/00H04L12/433H04Q9/00
    • H04L12/433
    • A loop type data highway system in which a plurality of data transmission control stations (abbreviated herein as stations) are connected in cascade to a loop transmission line. Each of the stations responds to a polling frame inquiring of request for reservation of the transmission line. The polling frame is composed of a first field for inquiring of the line reservation request and a second field indicative of whether the line is reserved or not. Each station receives signals inputted from the upstream side along the line and sequentially repeats them to the downstream side along the line without delay. In the station having the line reservation requests, a pattern representative of the line reservation is written in the second field after reception of the first field and sends out the polling frame to the downstream. When the second field as received indicates the non-reserved state of the transmission line, transmission of data is initiated in succession to the second field.
    • 其中多个数据传输控制站(本文中简称为站)级联连接到环路传输线路的环路型数据高速公路系统。 每个站响应询问传输线的预约请求的轮询帧。 轮询帧由用于查询线路预留请求的第一字段和指示该线路是否被保留的第二字段组成。 每个站接收沿着上游侧输入的信号,并且不间断地将它们沿着该线顺序地重复到下游侧。 在具有线路预留请求的台站中,在接收到第一场之后,在第二场中写入表示线路预约的模式,并向下游发送轮询帧。 当接收到的第二字段指示传输线的非保留状态时,数据的传输是与第二个字段相继发起的。