Bonding over sub-carrier multiplexed channels

1 . A transmit circuit configured to:

receive a client signal,

process the client signal to form a plurality of constituent signals where the plurality of constituent signals comprise the client signal, and

provide each of the plurality of constituent signals to a media layer for each of the plurality of constituent signals to be modulated on a respective sub-carrier in sub-carrier multiplexing (SCM),

wherein the client signal is one of

(1) one or more Ethernet signals and the plurality of constituent rate signals are Flexible Ethernet (FlexE) layer signals

(2) one or more Optical Transport Network (OTN) or Ethernet signals and the plurality of constituent signals are Flexible OTN (FlexO) layer signals,

(3) one or more Ethernet signals and the plurality of constituent signals are ZR layer signals, and

(4) one or more Ethernet signals and the plurality of constituent signals are Metro Transport Network (MTN) layer signals.

2 . The transmit circuit of claim 1 , wherein the media layer utilizes copper where the plurality of constituent signals are provided to an intermediate frequency (IF) modulator in the media layer.

3 . The transmit circuit of claim 1 , wherein the media layer utilizes fiber where the plurality of constituent signals are provided to a transmitter in the media layer.

4 . The transmit circuit of claim 1 , wherein the media layer is in a point-to-multipoint topology.

5 . A receive circuit configured to:

receive a plurality of constituent signals from a media layer where each of the plurality of constituent signals are demodulated from a respective sub-carrier in sub-carrier multiplexing (SCM),

process the plurality of constituent signals, which were aggregated together in the media layer, to form a client signal, and

provide the client signal,

wherein the client signal is one of

(1) one or more Ethernet signals and the plurality of constituent rate signals are Flexible Ethernet (FlexE) layer signals,

(2) one or more Optical Transport Network (OTN) or Ethernet signals and the plurality of constituent rate signals are Flexible OTN (FlexO) layer signals,

(3) one or more Ethernet signals and the plurality of constituent signals are ZR layer signals, and

(4) one or more Ethernet signals and the plurality of constituent signals are Metro Transport Network (MTN) layer signals.

6 . The receive circuit of claim 5 , wherein the media layer utilizes copper where the plurality of constituent signals are each received from an intermediate frequency (IF) demodulator in the media layer.

7 . The receive circuit of claim 5 , wherein the media layer utilizes fiber where the plurality of constituent signals are received from a receiver in the media layer.

8 . The receive circuit of claim 5 , wherein the media layer is in a point-to-multipoint topology.

9 . A sub-carrier multiplexing (SCM) system comprising:

a digital layer including circuitry configured to interface with a client and to interface with a media layer via a plurality of constituent signals, that together comprise a client signal; and

the media layer including sub-carrier multiplexing (SCM) with each sub-carrier configured to carry one of the plurality of constituent signals, wherein the media layer utilizes copper where the plurality of constituent signals are provided to an intermediate frequency (IF) modulator in the media layer.

10 . The SCM system of claim 9 , wherein the client signal is one of

(1) one or more Ethernet signals and the plurality of constituent signals are Flexible Ethernet (FlexE) layer signals,

(2) one or more Optical Transport Network (OTN) or Ethernet signals and the plurality of constituent signals are Flexible OTN (FlexO) layer signals,

(3) one or more Ethernet signals and the plurality of constituent signals are ZR layer signals, and

(4) one or more Ethernet signals and the plurality of constituent signals are Metro Transport Network (MTN) layer signals.

11 . The SCM system of claim 9 , wherein the media layer utilizes passive optical network (PON).