Method and device for transmitting optical channel transport unit signal

1. A method for transmitting an Optical Channel Transport Unit signal, the method comprising:

receiving an Optical Channel Transport Unit OTUk signal after optical to electrical conversion;

mapping the OTUk signal to an Optical Channel Payload Unit OPUflex payload part of an Optical Channel Data Unit ODUflex signal;

inserting an OPUflex overhead and an ODUflex overhead into the ODUflex signal to obtain the ODUflex signal;

multiplexing and mapping multiple ODUflex signals to an OPUj signal, wherein j>k; and

wrapping the OPUj signal into an ODUj signal and wrapping the ODUj signal into an OTUj signal, and sending the OTUj signal.

2. The method according to claim 1 , wherein the ODUflex signal is mapped to the OPUj signal by using a Generic Mapping Procedure (GMP) in an asynchronous mapping manner.

3. The method according to claim 1 , wherein the multiplexing and mapping multiple ODUflex signals to the OPUj signal comprises:

performing synchronous demultiplexing processing on the ODXflex signal to obtain M N-byte units;

performing processing of mapping and inserting adjustment overheads on the M N-byte units respectively to obtain M time slot units; and

performing byte interleaving and multiplexing processing on the M time slot units occupied by the ODU signal to obtain a signal mapped to a payload part of the OPUj signal.

4. The method according to claim 1 , wherein the wrapping the OPUj signal into the ODUj signal and wrapping the ODUj signal into the OTUj signal, and sending the OTUj signal comprises:

inserting an OPUj overhead into the signal mapped to the payload part of the OPUj signal to obtain the OPUj signal;

inserting an ODUj overhead into the OPUj signal to obtain the ODUj signal;

inserting an OTUj overhead and an OTUj Forward Error Correction (FEC) part into the ODUj signal to obtain the OTUj signal; and

sending the OTUj signal.

5. The method according to claim 1 , wherein before the multiplexing and mapping multiple ODUflex signals to the OPUj signal, the method further comprises: performing scheduling processing on the ODUflex signal.

6. A method for transmitting an Optical Channel Transport Unit signal, the method comprising:

receiving an Optical Channel Transport Unit OTUj signal after optical to electrical conversion;

unwrapping the OTUj signal into an Optical Channel Data Unit ODUj signal and unwrapping the ODUj signal into a payload part of an Optical Channel Payload Unit OPUj signal;

demapping and demultiplexing the payload part of the OPUj signal to obtain multiple Optical Channel Data Unit ODUflex signals;

extracting an ODUflex overhead and an OPUflex overhead of ODUflex signal; and

demapping the ODUflex signal to obtain an OTUk signal from an Optical Channel Payload Unit OPUflex payload part of the ODUflex signal, and sending the OTUk signal, wherein j>k.

7. The method according to claim 6 , wherein the unwrapping the OTUj signal into the ODUj signal and unwrapping the ODUj signal into the OPUj signal comprises: after extracting an OTUj overhead of the OTUj signal and stripping off an OTUj Forward Error Correction FEC part of the OTUj signal, extracting an ODUj overhead and an OPUj overhead to obtain the payload part of the OPUj signal.

8. The method according to claim 6 , wherein the demapping and demultiplexing the payload part of the OPUj signal to obtain multiple Optical Channel Data Unit ODUflex signal comprises:

performing byte deinterleaving and demultiplexing processing on the payload part of the OPUj signal to obtain M time slot units;

performing processing of extracting adjustment overheads and demapping on the M time slot units respectively to obtain M N-byte units that are occupied; and

performing synchronous multiplexing processing on the M N-byte units to obtain multiple ODUflex signals.

9. The method according to claim 6 , wherein after the demapping and demultiplexing the OPUj signal to obtain multiple Optical Channel Data Unit ODUflex signal, the method further comprises: performing scheduling processing on the ODUflex signal.

10. A computer program product comprising a non-transitory computer readable storage medium storing program code thereon for transmitting an Optical Channel Transport Unit signal, the program code comprising instructions executed by a processor for a method that comprises:

receiving an Optical Channel Transport Unit OTUk signal after optical to electrical conversion;

mapping the OTUk signal to an Optical Channel Payload Unit OPUflex payload part of an Optical Channel Data Unit ODUflex signal;

inserting an OPUflex overhead and an ODUflex overhead into the ODUflex signal to obtain the ODUflex signal;

multiplexing and mapping multiple ODUflex signals to an OPUj signal, wherein j>k; and

wrapping the OPUj signal into an ODUj signal and wrapping the ODUj signal into an OTUj signal, and sending the OTUj signal.

11. A computer program product comprising a non-transitory computer readable storage medium storing program code thereon for transmitting an Optical Channel Transport Unit signal, the program code comprising instructions executed by a processor for a method that comprises:

receiving an Optical Channel Transport Unit OTUj signal after optical to electrical conversion;

unwrapping the OTUj signal into an Optical Channel Data Unit ODUj signal and unwrapping the ODUj signal into a payload part of an Optical Channel Payload Unit OPUj signal;

demapping and demultiplexing the payload part of the OPUj signal to obtain multiple Optical Channel Data Unit ODUflex signals;

extracting an ODUflex overhead and an OPUflex overhead of ODUflex signal; and

demapping the ODUflex signal to obtain an OTUk signal from an Optical Channel Payload Unit OPUflex payload part of the ODUflex signal, and sending the OTUk signal, wherein j>k.