Multiplex communications – Duplex – Convertible to half duplex
Patent
1995-01-19
1998-10-20
Nguyen, Chau
Multiplex communications
Duplex
Convertible to half duplex
370445, H04L 12413
Patent
active
058257551
ABSTRACT:
A method and apparatus for a node to automatically switch between half-duplex and full-duplex transmission in CSMA/CD networks characterized by a first and second device coupled over a communication link to allow communication of information and control signals between the first and second device. Each of the two devices include a transmit circuit and a receive circuit, wherein the first device begins to transmit information on a first communication circuit, the first communication circuit providing for communication of information between the first device and the second device, and the second device receives the transmitted information. If, while the first device is transmitting information to the second device, the second device begins to transmit information on a second communication circuit, the second communication circuit providing for communication of information between the second device and the first device, and the first device receives the transmitted information, full-duplex communication therebetween is established. If, while the first device is transmitting information to the second device, the second device transmits a collision detect signal and the first device receives the collision detect signal, half-duplex communication therebetween is subsequently established.
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Thompson Geoffrey O.
Woodruff Paul
Bay Networks Inc.
Nguyen Chau
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