OPTICAL TRANSMISSION SYSTEM, OPTICAL TRANSMISSION APPARATUS, AND OPTICAL TRANSMISSION METHOD

摘要

An optical transmission system includes: a first optical transmission apparatus configured to add an error correction code (ECC) having a code length in accordance with transmission quality of each of sub-carriers forming a super channel to a main signal, retrieve, from the ECC added to the main signal on a sub-carrier to be processed, a code portion in excess of a predetermined redundancy level, distribute the code portion to another sub-carrier, and concatenate the code portion of the ECC to be added to a main signal on the another sub-carrier into the ECC added to a main signal on the sub-carrier to be processed; and a second optical transmission apparatus configured to concatenate the cord portion of the ECC distributed from another sub-carrier into the ECC included in the optical signal, and decode a main signal in the optical signal on a corresponding sub-carrier by using the concatenated ECC.

主权项

1. An optical transmission system for transmitting and receiving an optical signal in a super channel, the optical system comprising:
a first optical transmission apparatus configured to add an error correction code having a code length in accordance with transmission quality of each of sub-carriers forming a super channel to a main signal, retrieve, from the error correction code added to the main signal on a sub-carrier to be processed, a code portion in excess of a predetermined redundancy level, distribute the code portion to another sub-carrier, concatenate the code portion of the error correction code to be added to a main signal on the another sub-carrier into the error correction code added to a main signal on the sub-carrier to be processed, and transmit, through the super channel made up by the sub-carriers, the optical signal to which the main signal having the error correction code of the predetermined redundancy level is multiplexed; and a second optical transmission apparatus configured to receive the optical signal transmitted from the first optical transmission apparatus, extract, from the optical signal on a sub-carrier to be processed, an error correction code distributed from another sub-carrier, concatenate the cord portion of the error correction code distributed from another sub-carrier into the error correction code included in the optical signal, and decode a main signal in the optical signal on a corresponding sub-carrier by using the concatenated error correction code.