Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1981-12-03
1985-07-23
Martin, John C.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
455607, 455 9, 3408255, 370 93, 375 3, H04B 900
Patent
active
045312389
ABSTRACT:
An active repeater for a star configured communications network includes a threshold detector for collision detection. Whenever two or more terminals simultaneously feed data into the repeater, a threshold sensitive collision detector is triggered to logically isolate the data from the output of the repeater and to logically substitute a predetermined collision signal therefor, thereby causing the competing terminals to reset to retry the transmissions at randomly selected later times.
REFERENCES:
patent: 4063220 (1977-12-01), Metcalfe et al.
patent: 4099024 (1978-07-01), Boggs et al.
patent: 4161786 (1979-07-01), Hopkins et al.
patent: 4234968 (1980-11-01), Singh
patent: 4271523 (1981-06-01), Gable
patent: 4292623 (1981-09-01), Eswaran et al.
patent: 4330869 (1982-05-01), Robieux
Laser Focus, vol. 18, No. 4, Apr. 1982, pp. 188-190, Newton, Mass. (USA) "Prototype Fibernet II Detects Data Collisions".
Compcon 80, Twenty-first IEEE Computer Society International Conference, Washington, S. A. Kahn et al., "Funtional & Logical Description of a New Fiber-Optic Contention Bus Network", pp. 268-272.
Murray Hallam G.
Rawson Eric G.
Schmidt Ronald V.
Stewart Lawrence C.
Coles Edward L.
Martin John C.
Xerox Corporation
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