Three-way message exchange clock synchronization

Details Three-way message exchange clock synchronization Three-way message exchange clock synchronization

2006-02-27

2010-11-16

Shah, Chirag G (Department: 2477)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C370S503000

Reexamination Certificate

active

07835366

ABSTRACT:
The invention includes a technique for clock recovery in a network having master and slave clocks in respective Time Division Multiplexing (“TDM”) network segments which are interconnected by a non-TDM segment. Master clock timestamps are sent to the slave. The slave measures a master clock timestamp inter-arrival interval, and sends slave clock timestamps to the master. The master measures a slave clock timestamp inter-arrival interval, and sends that slave clock timestamp inter-arrival interval to the slave. The slave then calculates 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 employs the difference to recover the first service clock in the second TDM segment.

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