APPARATUS AND METHOD FOR ENABLING A PASSIVE OPTICAL NETWORK ON SUPPORTING TIME SYNCHRONIZATION
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United States of America Patent
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Issued Date -
Jun 19, 2014
app pub date -
Apr 25, 2013
filing date -
Dec 17, 2012
priority date (Note) -
Abandoned
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Abstract
An apparatus for enabling a passive optical network (PON) having an OLT and at least one ONU on supporting time synchronization is disclosed. The apparatus comprises a timestamp correction module configured to make at least one network delay between the OLT and the at least one ONU of the PON equivalent to an equivalent path delay, wherein the timestamp correction module, through the PON, makes the at least one ONU responsible for modifying the timestamp in at least one PTP packet from the OLT, so that a slave clock at the backend of the at least one ONU is equivalent to synchronizing with a virtual master clock. The disclosure computes and corrects PTP commands so that the PTP clock at an ONU's backend may synchronize precisely with the master clock at an OLT's front end.
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