System for synchronizing clocks between communication units by using data from a synchronization message which competes with other messages for transfers over a common communication channel
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United States of America Patent
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Feb 21, 1995
Grant Date -
N/A
app pub date -
Oct 25, 1991
filing date -
Apr 25, 1989
priority date (Note) -
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status (Latency Note)
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Abstract
In an arrangement for synchronizing data and other information in a computerized system which comprises a common serial data communication channel (212), two or several collaborating units (201) are arranged connectable to the channel, wherein a respective unit comprises a clock (207). A main clock is included in the system and the clock in one of the units can be used as main clock. The units with associated communication element and communication channel are arranged in such a manner that the time of the main clock can be transferred to the clocks of the other units. The clocks are arranged so that they can operate with a common time base. The units/communication elements comprise hard- and software or hardware which brings about the setting of a respective clock with predetermined accuracy in dependence on the main clock time.
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