Communications network having a time-controlled...

Details Communications network having a time-controlled... Communications network having a time-controlled...

2005-07-12

2005-07-12

Patel, Jay (Department: 2637)

Pulse or digital communications

Synchronizers

Synchronizing the sampling time of digital data

C375S354000, C375S356000

Reexamination Certificate

active

06917656

ABSTRACT:
The invention relates to a communications network (1) comprising a plurality of network nodes (2), which include each a synchronization circuit (5) for generating a global clock signal (GT) from a local clock signal (LT) formed by a clock generator (4) in dependence on a time of reception of a message. The synchronization circuit (5) includes a divider arrangement (8) for dividing the local clock signal (LT) in dependence on a correction term (KT) and at least one divider factor which is produced by a scaler arrangement (9). The comparator circuit (10) is provided for forming the correction term by comparing the instant of reception of a message and of the local clock signal LT. Furthermore, the synchronizing circuit (5) includes a divider control (7) which may perform a change of at least one divider factor when the correction term (KT) exceeds a predefined first threshold.

REFERENCES:
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patent: 6622022 (2003-09-01), Du
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By Dr. Stefan Polenda et al., Entitled: Elecktronik No. 14, 1999, pp. 36 to 43, TTP: “Drive By Wire”.
By Hermann Kopetz, Andreas Kruger, Ditmar Millinger, Anton Schedl: Entitled: A Synchronization Strategy for a Time-Triggered Multicluster Real-Time System; Proc. of the 14thIEEE Symposium on Reliable Distributed Systems, Ba Neuenahr, Germany, IEEE Press, Sep. 1995.

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