Communications: electrical – Continuously variable indicating – Plural transmitters
Patent
1990-11-13
1992-11-24
Yusko, Donald J.
Communications: electrical
Continuously variable indicating
Plural transmitters
34087038, 34082507, 34082552, 370 941, H04Q 900, G08B 2100
Patent
active
051666782
ABSTRACT:
A pair of master units share a common communication link to communicate with one or more slave units. Each slave unit transmits a message only in response to a message from one of the master units. When an initial transmission request is received by a master unit, it monitors the communication link and only initiates transmission of a message when the link has been quiet for a link quiet time period. After completing a transmission of a message, the master unit waits a link grant time period before transmitting again to permit the other master unit an opportunity to transmit a message if it desires. Synchronization of the two master units, therefore, is achieved quickly and with minimum overhead.
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Martin, James, "Telecommunications and the Computer", pp. 223, 238-241 and 581-583.
Rosemount Inc.
Yusko Donald J.
Zimmerman Brian
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