Patent ID: 8457491
Filing Date: 2013-06-04
Classification: H04B,H04J,H04W

Abstract:
1. A method of determining transmission power of a plurality of optical channels for transmission of said optical channels along different respective paths through an optical transmission system, the method comprising: obtaining information indicative of the path of each optical channel through the optical transmission system, where at least two optical channels have different paths through the optical transmission system; allocating each optical channel to one of multiple different groups of optical channels in dependence upon the obtained information; determining a quality metric for each group of optical channels; wherein the step of determining a quality metric for each group of optical channels comprises: determining a quality metric for each optical channel; and determining the quality metric for each group of optical channels in dependence upon the quality metric for each optical channel within the respective group; and determining a total transmission power for each group in dependence upon the determined quality metric.