公开(公告)号：EP0004376A2

公开(公告)日：1979-10-03

申请号：EP79100859.2

申请日：1979-03-21

申请人： THE MITRE CORPORATION

发明人： Hopkins, Gregory T. ,  Wagner, Paul E.

IPC分类号： H04L11/16

CPC分类号： G06F13/376 ,  H04L12/40032 ,  H04L12/413

摘要： A multiple access digital communications system comprises a plurality of remotely located terminals coupled to a communications bus including a pair of oppositely directed, unidirectional signal paths (10, 12) and a unidirectional path coupler (14) for transferring signals from the inbound path (10) to the outbound path (12).
To send a message from one terminal to another desired terminal, a corresponding bus interface unit (20A) coupled to both the inbound and outbound paths (10, 12) is adapted to perform an rf. carrier sensing operation to determine as to whether or not any other subscriber is transmitting on the inbound path (10). If no carrier is detected, the bus interface unit (20A) confirms this determination by first beginning to transmit a message packet and then monitoring the outbound path (12) during a collision window. If the transmitted message is received intact within this collision window, the bus interface unit (20A) may transmit any remaining portion of its message packet on the inbound path (10).

摘要翻译： 多址数字通信系统包括耦合到通信总线的多个远程定位终端，该通信总线包括一对相反方向的单向信号路径（10,12）和用于从入站路径（10,12）传送信号的单向路径耦合器（14） ）到出站路径（12）。 为了将消息从一个终端发送到另一个期望的终端，耦合到入站和出站路径（10,12）的对应总线接口单元（20A）适于执行rf。 载波感测操作，以确定任何其他用户是否在入站路径（10）上进行发送。 如果没有检测到载波，则总线接口单元（20A）首先确认该确定，以发送消息分组，然后在冲突窗口期间监视出站路径（12）。 如果发送的消息在该冲突窗口内被完整地接收，则总线接口单元（20A）可以在入站路径（10）上发送其消息分组的剩余部分。

公开(公告)号：EP0004376A3

公开(公告)日：1979-10-31

申请号：EP79100859

申请日：1979-03-21

申请人： THE MITRE CORPORATION

发明人： Hopkins, Gregory T. ,  Wagner, Paul E.

IPC分类号： H04L11/16

CPC分类号： G06F13/376 ,  H04L12/40032 ,  H04L12/413

摘要： A multiple access digital communications system comprises a plurality of remotely located terminals coupled to a communications bus including a pair of oppositely directed, unidirectional signal paths (10, 12) and a unidirectional path coupler (14) for transferring signals from the inbound path (10) to the outbound path (12). To send a message from one terminal to another desired terminal, a corresponding bus interface unit (20A) coupled to both the inbound and outbound paths (10, 12) is adapted to perform an rf. carrier sensing operation to determine as to whether or not any other subscriber is transmitting on the inbound path (10). If no carrier is detected, the bus interface unit (20A) confirms this determination by first beginning to transmit a message packet and then monitoring the outbound path (12) during a collision window. If the transmitted message is received intact within this collision window, the bus interface unit (20A) may transmit any remaining portion of its message packet on the inbound path (10).

公开(公告)号：EP0004376B1

公开(公告)日：1982-09-29

申请号：EP79100859.2

申请日：1979-03-21

申请人： THE MITRE CORPORATION

发明人： Hopkins, Gregory T. ,  Wagner, Paul E.

IPC分类号： H04L11/16

CPC分类号： G06F13/376 ,  H04L12/40032 ,  H04L12/413