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1.发明公开Method of attaining communication of data packets on a local shared bus network and local shared bus network 失效在本地共享Busleitungsnetzwerk发送数据分组并在本地的方法共享Busleitungsnetzwerk。
公开(公告)号：EP0022170A2
公开(公告)日：1981-01-14
申请号：EP80102983.6
申请日：1980-05-29
CPC分类号： H04L12/413 , G06F13/376 , H04L12/40006
摘要： Asynchronous, collision-free communication of data packets is provided on a local shared bus network interconnecting a plurality of N ordered transceiving ports (1,2,3....,J,...N). The bus network includes a data bus (20) having a propagation delay time T and a control line (26) having a propagation delay from port J to port N of R(J), each port J including means (40) for ascertaining the presence of a data packet on said data bus at said port J, and being adapted to send and receive on said data bus variable length data packets. Each port J upon having a packet available for transmission executes the steps of placing a signal S(J) on said control line (26) to communicate to ports J + 1, J +2,...,N an intention to transmit a packet, delaying transmission for the time interval R(J) + T, ascertaining that no signal indicating an intention to transmit is being received at port J from any of ports 1,2,...,J- 1 , and that said data bus (20) at port J is unoccupied, transmitting the packet and terminating signal S(J). Prior to placing the signal S(J) on the control line (26), the port J ascertains that the data bus (20) is unoccupied for a time period 2T.
摘要翻译： 异步的，数据分组的无冲突的通信提供了一种本地共享总线互连网络N个上的多个有序收发端口（1,2,3，...，J，... N）。 总线网络包括用于确定一个数据总线（20）和具有从端口J至R（J）的端口N.传播延迟的传播延迟时间T和控制线（26），每个端口J包括装置（40） 在所述端口J所述数据总线上的数据分组的存在，并且是angepasst发送和接收关于所述总线可变长度的数据分组中的数据。 在具有可用于传输的分组中的每个端口J上执行所述控制线（26）放置一个信号S（J）的步骤，以对端口进行通信J + 1，J + 2，...，意图N个发送 分组，延迟传输的时间间隔R（j）+ T，探知确实没有信号指示意向发送信息是应端口J接收到来自任何端口1,2，...，J-1，并且所述数据的 总线（20）在端口J是未占用的，发送分组和终止信号S（J）。 在此之前将所述信号S（J）上的控制线（26），所述端口J查明所做的数据总线（20）未被占用的时间周期为2T。
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2.发明授权Method of attaining communication of data packets on a local shared bus network and local shared bus network 失效数据分组在本地共享总线网络和本地共享总线网络上通信的方法
公开(公告)号：EP0022170B1
公开(公告)日：1983-04-13
申请号：EP80102983.6
申请日：1980-05-29
CPC分类号： H04L12/413 , G06F13/376 , H04L12/40006
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3.发明公开Method of attaining communication of data packets on a local shared bus network and local shared bus network 失效数据分组在本地共享总线网络和本地共享总线网络上通信的方法
公开(公告)号：EP0022170A3
公开(公告)日：1981-04-22
申请号：EP80102983
申请日：1980-05-29
CPC分类号： H04L12/413 , G06F13/376 , H04L12/40006
摘要： Asynchronous, collision-free communication of data packets is provided on a local shared bus network interconnecting a plurality of N ordered transceiving ports (1,2,3....,J,...N). The bus network includes a data bus (20) having a propagation delay time T and a control line (26) having a propagation delay from port J to port N of R(J), each port J including means (40) for ascertaining the presence of a data packet on said data bus at said port J, and being adapted to send and receive on said data bus variable length data packets. Each port J upon having a packet available for transmission executes the steps of placing a signal S(J) on said control line (26) to communicate to ports J + 1, J +2,...,N an intention to transmit a packet, delaying transmission for the time interval R(J) + T, ascertaining that no signal indicating an intention to transmit is being received at port J from any of ports 1,2,...,J- 1 , and that said data bus (20) at port J is unoccupied, transmitting the packet and terminating signal S(J). Prior to placing the signal S(J) on the control line (26), the port J ascertains that the data bus (20) is unoccupied for a time period 2T.
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