Patent ID: 9671822
Date: 2017-06-06
CPC Classifications: G06F,H04J,H04L

Claim:
1. A method for estimating the skew and offset of a slave clock in a slave device in relation to a master clock in a master device, the slave device and the master device being connected by a network, the method including the steps of: exchanging timing messages between the master device and the slave device over the network, each timing message passing through at least one end-to-end transparent clock; recording timestamps which are the times of the sending and receiving said messages according to the respective clocks; recording the residence times, r estimating the skew and offset of the slave clock using the said timestamps and said residence times; and synchronizing the output of the slave clock to the master clock using said estimated offset and skew; and wherein the step of estimating the skew and offset estimates the skew α as the average of the skew α  wherein T T T T