Method and apparatus for mapping and de-mapping in an optical transport network

An apparatus for processing data in an Optical Transport Network (OTN), comprising:

• a processor and a computer readable non-transitory medium having a plurality of computer executable instructions stored thereon which, when executed by the processor, cause the processor to:
• map a Lower Order Optical Channel Data Unit (LO ODU) signal into a payload area of an Optical Channel Data Tributary Unit (ODTU) signal in groups of M bytes, wherein M is equal to the number of tributary slots of a Higher Order Optical Channel Payload Unit (HO OPU) that are to be occupied by the ODTU signal, and M is an integer larger than 1;
• encapsulate overhead information to an overhead area of the ODTU signal;
• and
• multiplex the ODTU signal into the HO OPU.

An apparatus for processing data in an Optical Transport Network (OTN), comprising:

• a processor and a computer readable non-transitory medium having a plurality of computer executable instructions stored thereon which, when executed by the processor, cause the processor to:
• parse a Higher Order Optical Channel Payload Unit (HO OPU) to obtain an Optical Channel Data Tributary Unit (ODTU) signal;
• and
• de-map a Lower Order Optical Channel Data Unit (LO ODU) signal from a payload area of the ODTU signal in groups of M bytes, wherein M is equal to the number of tributary slots of the HO OPU that are occupied by the ODTU, and M is an integer larger than 1.