Patent ID: 7352715
Filing Date: 2008-04-01
Classification: G06F,H04J

Abstract:
1. A method for synchronizine network elements, the method comprising: receiving at a network element a time synchronization message sent from a master clock element, the network element comprising an internal clock to be synchronized with a master clock of the master clock element, the time synchronization message comprising a time stamp specifying a time, as indicated by the master clock, when the master clock element sent the time synchronization message; calculating a latency of the time synchronization message; estimating an adjustment to be made to the internal clock in response to the time synchronization message; determining whether the latency is less tan the adjustment on the assumption that the latency is imbalanced by calculating an earliest current time of the master clock assuming that there is no latency and calculating a latest current time of the master clock by adding the calculated latency to the time stamp; adjusting the internal clock when the latency calculated is less than the adjustment estimated.