CPC H04L 1/0003 (2013.01) [H04L 1/004 (2013.01); H04L 1/20 (2013.01); H04Q 11/0067 (2013.01); H04Q 2011/0081 (2013.01)] | 22 Claims |
1. A method for improving spectral efficiency of an optical telecommunication network based on use of a first modulation coding schemes (MCS) for communication with a first end device in operable communication with a hub of the optical communication network, the method comprising the steps of:
selecting the first MCS for a first telecommunication signal to be exchanged between the hub and the first end device over a first channel of the optical telecommunication network, wherein the first telecommunication signal includes a first bandwidth and a first dynamic range, wherein the first MCS includes a first modulation format having an integer order and configured to maximize the first dynamic range such that the first dynamic range does not exceed a signal parameter threshold of the first channel over the first bandwidth;
indexing the first telecommunication signal into a plurality of adjacent sub-signals, wherein each adjacent sub-signal of the plurality of adjacent sub-signals spans a second bandwidth less than and within the first bandwidth; and
dynamically adjusting a first adjacent sub-signal to achieve a second dynamic range (a) greater than the first dynamic range, and (b) that does not exceed the signal parameter threshold of the channel within a first frequency range of the second bandwidth of the first adjacent sub-signal,
wherein the step of dynamically adjusting the first adjacent sub-signal is based on sub-steps of (a) modifying the first modulation format by a non-integer fraction of the first modulation format, and (b) applying a different coding rate to the first adjacent sub-signal than is applied to at least one other adjacent sub-signal of the plurality of adjacent sub-signals.
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