Dual master implied token communication system
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United States of America Patent
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Jun 16, 1992
Issued Date -
N/A
app pub date -
Oct 29, 1990
filing date -
Aug 11, 1987
priority date (Note) -
Expired
status (Latency Note)
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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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