Decentralized data transmission system

Details Decentralized data transmission system Decentralized data transmission system

1978-09-21

1980-10-07

Yusko, Donald J.

Communications: electrical

Digital comparator systems

364900, 370110, H04Q 900, G06F 300

Patent

active

042271789

ABSTRACT:
Described is a decentralized data transmission system and a method of operating the system. A relatively high speed transmission medium connects a number of relatively lower speed terminals in a loop or similar configuration. A central or monitoring station is connected in the transmission medium which includes a memory table containing the listing of the station addresses connected to the transmission loop. The monitoring station operates as a control station for transmitting the address of a first station to be enabled to transmit a message. The addressed station recognizes its address and responds either with a message destined for another station or with a signal that no message is to be sent. At the end of a message, an enabled station sends a special character to notify the monitoring station that the next station in the memory table can be addressed to grant usage of the transmission medium.

REFERENCES:
patent: 3796835 (1974-03-01), Closs et al.
patent: 3845472 (1974-10-01), Buchanan et al.
patent: 3851104 (1974-11-01), Willard et al.
patent: 3856993 (1974-12-01), Closs et al.
patent: 4161786 (1979-07-01), Hopkins et al.

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