초록 ▼

A loop communication system, interconnecting a number of nodes around the loop, in which two oppositely directed unidirectional loops service the two directions of transmission. Each of the loops comprises a time division multiplexed transmission facility. Each of the nodes has facilities for connec

A loop communication system, interconnecting a number of nodes around the loop, in which two oppositely directed unidirectional loops service the two directions of transmission. Each of the loops comprises a time division multiplexed transmission facility. Each of the nodes has facilities for connecting the communications on each incoming channel to a utilization device connected to that node, for connecting the communication from a utilization device connected to that node to each outgoing channel, or for repeating the communication from any incoming channel to a corresponding outgoing channel. Assignment of a communication to a given channel is accomplished using a centralized control means which causes the communicating devices to be connected using corresponding channels in the two loops, and using that portion of the loop which has the smaller number of intermediate nodes.

대표청구항 ▼

A bidirectional loop transmission system comprising: a bidirectional time-multiplexed communication loop for conveying data words in a predetermined number of channels in a first direction and for conveying data words in said predetermined number of channels in a second direction, said second direct

A bidirectional loop transmission system comprising: a bidirectional time-multiplexed communication loop for conveying data words in a predetermined number of channels in a first direction and for conveying data words in said predetermined number of channels in a second direction, said second direction being the opposite of said first direction; a plurality of nodes connected to said loop and comprising a communication means for transmitting data words in said channels of said first and said second directions, for receiving data words from said channels of said first and second directions, and for repeating data words received in said channels of said first direction and said second direction; means for generating communication request signals defining a requested communication between a first and a second one of said plurality of nodes; and first control means responsive to said communication request signals for identifying one direction of said bidirectional time-multiplexed communication loop as a direction having the minimum number of intermediate nodes between said first and said second node and for controlling the communication means of said first node to transmit data words of said requested communication in channels of said direction of said loop having the minimum number of intermediate nodes and to receive data words of said requested communication of said loop from channels of the other direction of said loop and for controlling the communication means of said second node to transmit data words of said requested communication in said channels of said other direction of said loop and to receive data words of said requested communication from channels of said direction of said loop having the minimum number of intermediate nodes.