Data Processing Method and Apparatus in Optical Communication

A data processing method in optical communication, comprising:

• obtaining W first dual-polarization symbol data streams, wherein W is an integer greater than 1, each of the W first dual-polarization symbol data streams is located in two orthogonal polarization directions;
• and
• performing second data processing on the W first dual-polarization symbol data streams, to obtain M first encoded data streams, wherein
• M is an integer greater than 1, the second data processing comprises symbol demapping processing, and q×P bits obtained by performing symbol demapping processing on P consecutive symbols in the first dual-polarization symbol data stream are distributed into at least two of the M first encoded data streams in either polarization direction, wherein P is an integer greater than 1, and q is a positive integer;
• and in either polarization direction, q bits are obtained by performing symbol demapping processing on each symbol;
• and
• performing FEC decoding processing on the M first encoded data streams, to obtain a to-be-received bit data stream.

A data processing apparatus in optical communication, wherein the data processing apparatus comprises

• a processor and a communication interface, the communication interface is configured to receive and send data, and
• the processor is configured to:
• obtain a to-be-sent bit data stream;
• perform forward error correction (FEC) encoding processing on the to-be-sent bit data stream, to obtain M first encoded data streams, wherein M is an integer greater than 1;
• and
• perform first data processing on the M first encoded data streams, to obtain W first dual-polarization symbol data streams, wherein
• W is an integer greater than 1;
• each of the W first dual-polarization symbol data streams is located in two orthogonal polarization directions;
• the first data processing comprises symbol mapping processing;
• in either of the two polarization directions, P consecutive symbols in the first dual-polarization symbol data stream are obtained by performing symbol mapping processing on q×P bits, and the q×P bits are from at least two of the M first encoded data streams, wherein P is an integer greater than 1, and q is a positive integer;
• and in either polarization direction, each symbol is obtained by performing symbol mapping processing on q bits.

A data processing apparatus in optical communication, wherein the data processing apparatus comprises

• a processor and a communication interface, the communication interface is configured to receive and send data, and
• the processor is configured to:
• obtain W first dual-polarization symbol data streams, wherein W is an integer greater than 1, each of the W first dual-polarization symbol data streams is located in two orthogonal polarization directions;
• and
• perform second data processing on the W first dual-polarization symbol data streams, to obtain M first encoded data streams, wherein
• M is an integer greater than 1, the second data processing comprises symbol demapping processing, and q×P bits obtained by performing symbol demapping processing on P consecutive symbols in the first dual-polarization symbol data stream are distributed into at least two of the M first encoded data streams in either polarization direction, wherein P is an integer greater than 1, and q is a positive integer;
• and in either polarization direction, q bits are obtained by performing symbol demapping processing on each symbol;
• and
• perform FEC decoding processing on the M first encoded data streams, to obtain a to-be-received bit data stream.