Patent ID: 9407458
Filing Date: 2016-08-02
CPC Classification: H04B,H04J,H04L

Claim Text:
1. A method of transmitting an asynchronous transport signal over an optical fiber section of an Optical Transport Network, comprising: receiving said asynchronous transport signal, said asynchronous transport signal having a frame structure referred to as Optical Transport Module of size k (OTU-k) frames, each OTU-k frame comprising a frame alignment signal and a higher order Optical Data Unit, being an Optical Data Unit of size k (ODU-k) frame, with an overhead section and a payload section, said ODU-k frame representing a switchable transport entity within said Optical Transport Network and being synchronously mapped into a corresponding ODU-k frame; encapsulating said OTU-k frames into outer transport frames offering a payload rate higher than a nominal bit rate of said OTU-k frames; generating an output optical signal comprising said outer transport frames with said encapsulated OTU-k frames using a locally generated clock; and transmitting said output optical signal over said optical fiber section; wherein said encapsulating comprises: adapting the bit rate of said OTU-k frames to the payload rate of said outer transport frames derived from said locally generated clock through a justification and stuffing process; and synchronously mapping the rate adapted OTU-k frames into said outer transport frames at the rate of said locally generated clock.