Patent ID: 7835366
Filing Date: 2010-11-16
Classification: H04J

Abstract:
1. A method for clock recovery in a network having first and second Time Division Multiplexing (“TDM”) segments interconnected by a non-TDM segment, the method comprising the steps of: in the first TDM segment, sending master clock timestamps to the second TDM segment; in the second TDM segment, measuring a master clock timestamp inter-arrival interval; in the second TDM segment, sending slave clock timestamps to the first TDM segment; in the first TDM segment, measuring a slave clock timestamp inter-arrival interval; in the first TDM segment, sending the slave clock timestamp inter-arrival interval to the second TDM segment; in the second TDM segment, calculating an error signal based at least in-part on the difference between the master clock timestamp inter-arrival interval and the slave clock timestamp inter-arrival interval; and employing the difference to recover the first service clock in the second TDM segment.