Method and device for mapping ethernet code blocks to otn for transmission

A sending device, comprising:

• a mapping unit, adapted to map 10 Gigabit (10G) Ethernet code blocks to an optical transport network (OTN) frame corresponding to an optical channel payload unit 2 (OPU2) as a bit stream within a justification range according to an asynchronous bit-stream mapping manner, set an identifier for indicating the asynchronous bit-stream mapping manner at an overhead (OH) portion of the OTN frame, record an offset of a certain code block in the bit stream relative to a certain position of the OTN frame, and set an indicator for indicating the offset position;
• and
• a transmission unit, adapted to map the obtained OTN frame to the OPU2 of the OTN, and send the OTN frame.

A method for mapping Ethernet code blocks to an optical transport network (OTN) for transmission, comprising:

• decoding a received OTN frame to obtain an indicator for indicating an offset position of a code block and an identifier for indicating a mapping manner, locating a position of the code block in the OTN frame according to the indicator for indicating the offset position of the code block, calculating positions of other code blocks according to a size of the code block, and acquiring that the mapping manner for mapping 10 Gigabit (10G) Ethernet code blocks to an OTN frame corresponding to an optical channel payload unit 2 (OPU2) is an asynchronous stream mapping manner according to the identifier for indicating the mapping manner;
• and
• decoding the 10G Ethernet code blocks at corresponding positions according to the asynchronous stream mapping manner.

A receiving and processing device, comprising:

• an information acquisition unit, adapted to decode a received optical transport network (OTN) frame to obtain an indicator for indicating an offset position of a code block and an identifier for indicating a mapping manner, locate a position of the code block in the OTN frame according to the indicator for indicating the offset position of the code block, calculate positions of other code blocks in the OTN frame according to a size of the code block, and acquire that the mapping manner for mapping 10 Gigabit (10G) Ethernet code blocks to an OTN frame corresponding to an optical channel payload unit 2 (OPU2) is an asynchronous stream mapping manner according to the identifier for indicating the mapping manner;
• and
• a decoding unit, adapted to decode the 10G Ethernet code blocks at corresponding positions according to the asynchronous stream mapping manner.