Communications: electrical – Digital comparator systems
Patent
1975-06-19
1977-04-19
Thomas, James D.
Communications: electrical
Digital comparator systems
179 15AL, G06F 304, H04J 304, H04J 308, H04J 306
Patent
active
040191761
ABSTRACT:
A characteristic message exchange procedure is performed by a set of contler units at separate stations and of functionally identical design. The combination of a controller unit and a utilization unit that characterizes the application of the station constitutes a complete station. Among other things, the controller units provide sequencing of the transmitting privilege among the stations one by one. All message data are classified into four basic message models representing the applications of the stations. The stations are interconnected by a single common transmission channel and the controllers are equipped to be sensitive to only four basic message models. No central control unit is required for monitoring transmissions between stations. All active stations receive all messages essentially simultaneously. The channel may be a unidirectional wire line looping the stations, in which case essentially simultaneous reception by all is provided by passing on the received signals, even at an addressed station, without intermediate storage and continued circulation is prevented only by blocking the received message at the station that is transmitting.
REFERENCES:
patent: 3564145 (1971-02-01), Deutsch
patent: 3597549 (1971-08-01), Farmer
patent: 3632881 (1972-01-01), Graham
patent: 3646274 (1972-02-01), Nadir
patent: 3680056 (1972-07-01), Kropel
patent: 3697959 (1972-10-01), Abramson
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patent: 3787627 (1974-01-01), Abramson
patent: 3890471 (1975-06-01), Hachenburg
patent: 3891804 (1975-06-01), Hachenburg
Cour Jean M.
Suchard Jean F.
Centre d'Etude et de Realisation en Informatique Appliquee - C.E
Thomas James D.
Woodward William R.
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