Bidirectional single wire data transmission and wrap control
First Claim
1. In a data communications system having a host unit and a plurality of terminals connected to a single transmission wire;
- means at said host unit for placing data on the transmission wire traveling in opposite directions;
a plurality of repeater means each interfacing a pair of said terminals with said transmission wire for receiving and regenerating data from either direction, distributing said data to at least one of said pair of terminals and coupling data from said terminals to said transmission wire;
said repeater means including a first directional coupler for coupling data signals from the repeater means to said transmission wire in the one direction without interfering with the data traveling on the wire in the opposite direction and a second directional coupler for coupling data signals from the repeater means to said transmission wire in the other direction without interfering with data signals traveling on the wire in the opposite direction whereby the data signals can be conveyed via the same communication wire in opposite directions simultaneously, thereby doubling the data handling capacity of the communications system.
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Accused Products
Abstract
A data communication system is provided in which the data handling capacity of the system is doubled. The data in the system travels on a single wire in both directions simultaneously. Each pair of terminals associated with the communication system is interfaced with the single wire by a repeater. The repeater includes first and second directional couplers for coupling data signals from the repeater to the wire in the one direction and in the opposite direction, respectively, without substantial signal interference with signals being received by the repeater on the same wire. A wrap control function is included in the repeater which allows data signals to be placed on the wire going in the opposite direction from the received signals.
125 Citations
9 Claims
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1. In a data communications system having a host unit and a plurality of terminals connected to a single transmission wire;
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means at said host unit for placing data on the transmission wire traveling in opposite directions; a plurality of repeater means each interfacing a pair of said terminals with said transmission wire for receiving and regenerating data from either direction, distributing said data to at least one of said pair of terminals and coupling data from said terminals to said transmission wire; said repeater means including a first directional coupler for coupling data signals from the repeater means to said transmission wire in the one direction without interfering with the data traveling on the wire in the opposite direction and a second directional coupler for coupling data signals from the repeater means to said transmission wire in the other direction without interfering with data signals traveling on the wire in the opposite direction whereby the data signals can be conveyed via the same communication wire in opposite directions simultaneously, thereby doubling the data handling capacity of the communications system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification