Method for managing and maintaining an accurate distribution of time in a network when a failure occurs
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United States of America Patent
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Feb 14, 2017
Grant Date -
Sep 3, 2015
app pub date -
Aug 27, 2013
filing date -
Sep 19, 2012
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Abstract
A packet network includes a peer-to-peer transparent clock hardware support, a peer-to-peer transparent clock being at least used in order to measure and correct delays of link or path adjacent to network elements and NE residence time, and a Master/Slave end-to-end synchronization path including a first set of network elements A time stamped packet including at least a correction field indicating the cumulated transmission delay of the said packet along the synchronization path. A method includes a detecting a failure event; storing by the first element a measured past path delay of at least one previously transmitted time stamped packet received by the first element; and a function of the incoming current value of the received correction field, the first network element residence time, and a first value depending of a measured past path delay value. A first indicator is generated when detecting a failure.
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