Patent ID: 9184860
Filing Date: 2015-11-10
Classification: H04J,H04W

Abstract:
1. A time synchronization method, wherein a first time packet is sent by a first node at a first time over a first working wavelength, and the first time packet carries a sending time of the first time packet, the method comprising: receiving, by the first node, the first time packet at a second time; receiving, by the second node, a second time packet at a fourth time, wherein the second time packet is sent by the first node at a third time over a second working wavelength, and the second time packet carries the sending time of the second time packet; and obtaining, by the second node, an absolute time deviation between the second node and the first node according to the first time, the second time, the third time, the fourth time, a first signal transmission rate corresponding to the first working wavelength, and a second signal transmission rate corresponding to the second working wavelength, wherein the first working wavelength is different from the second working wavelength; and synchronizing a local time of the second node with a local time of the first node according to the calculated absolute time deviation.