Optical signal transmission method and related apparatus

An optical signal transmission device, comprising:

• a processor;
• and
• a memory coupled to the processor and configured to store a computer program comprising instructions that when invoked by the processor cause the optical signal transmission device to:
• map a first optical data unit (ODU) frame to a first flexible tributary unit (TUflex) frame, wherein the first TUflex frame comprises a plurality of payload blocks;
• map the first TUflex frame to a first optical payload unit (OPU) frame, wherein the payload blocks are distributed into a payload area of the first OPU frame;
• map the first OPU frame to a second ODU frame, wherein a bit rate of the second ODU frame is greater than a bit rate of the first ODU frame;
• map the second ODU frame to a first optical transport unit (OTU) frame;
• and
• send the first OTU frame.

A computer program product comprising computer-executable instructions that are stored on a non-transitory computer-readable medium and that, when executed by a processor, cause a chip to:

• map a first optical data unit (ODU) frame to a first flexible tributary unit (TUflex) frame, wherein the first TUflex frame comprises a plurality of payload blocks;
• map the first TUflex frame to a first optical payload unit (OPU) frame, wherein the payload blocks are distributed into a payload area of the first OPU frame;
• map the first OPU frame to a second ODU frame, wherein a bit rate of the second ODU frame is greater than a bit rate of the first ODU frame;
• map the second ODU frame to a first optical transport unit (OTU) frame;
• and
• send the first OTU frame.