Patent ID: 8570874
Filing Date: 2013-10-29
Classification: H04J,H04Q

Abstract:
1. A method for synchronizing time in a Passive Optical Network (PON) comprising a master clock side and a slave clock side, the method comprising: receiving, at the slave clock side, a first PON protocol transmission frame carrying a first clock packet; acquiring, at the slave clock side, a first time at a first packet time stamp generating point located at a PON Media Access Control (MAC) layer of the first PON protocol transmission frame, the acquired first time being regarded as the time when the first clock packet is received; receiving, at the slave clock side, a second PON protocol transmission frame carrying a second clock packet, wherein the second clock packet carries the time when the first clock packet is sent; and adjusting, at the slave clock side, local time according to a difference between the time when the first clock packet is sent and the time when the first clock packet is received.