Communications network having a time-controlled communication protocol

摘要

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.