Loosely coupled distributed computer system with node synchronization for precision in real time applications
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United States of America Patent
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Sep 12, 1989
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N/A
app pub date -
Jun 24, 1987
filing date -
Jun 22, 1984
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Abstract
A loosely coupled distributed computer system provided with node synchronization for precision in real time applications includes a number of loosely coupled node computers. Each computer includes a local real time clock, I/O subsystems, and a communication unit. The computers are connected to each other by a transmission medium for serial communication. Each computer contains a synchronization unit for synchronization of the local real time clocks in each of the computer nodes with the real time clocks of other nodes. Each synchronization unit is connected with a digital output line of its associated local real time clock for supply of unsynchronized time signals from the digital output line to a digital input of the synchronization unit. The latter also has a digital output supplying global synchronized time signals to digital inputs of other I/O subsystems and is operatively connected with the communication unit for obtaining therefrom information as to the point of time of sending a message. The synchronization unit generates global synchronized time signals on its digital output line as a function of the time of an information from a sender and the arrival time information of other computer systems.
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Patent Owner(s)
- FAULT TOLERANT SYSTEMS, FTS-COMPUTERTECHNIK GESMBH
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Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Kopetz, Hermann | Vienna, AT | 46 | 295 |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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