Patent ID: 9705770
Date: 2017-07-11
CPC Classifications: H04B,H04J,H04L,H04Q

Claim:
1. A method for determining asymmetry in transmission delay due to the use of different wavelengths on one or more links which connect a first node to a second node of a communication network, the method comprising: determining a forward transmission delay for a forward direction on a first link from the first node to the second node using a first wavelength, and determining a reverse transmission delay for a reverse direction on either of the first link or a second link from the second node to the first node using a second wavelength, wherein the second wavelength is different from the first wavelength; calculating a group delay applicable to the different wavelengths used in the forward direction and in the reverse direction; and determining an asymmetry in transmission delay due to the use of different wavelengths from the calculation of the group delay applicable to the different wavelengths used in the forward direction and in the reverse direction.