Patent ID: 6868514
Filing Date: 2005-03-15
Classification: H03M

Abstract:
1. An FEC frame structuring method applied to an optical transmission system, comprising: a first error correction code generation step of generating first error correction codes by encoding overhead information and transmission information of n (n is a given natural number) subframes in units of m (m is a natural number, and a factor of n) subframes, and adding redundant information for the n/m generated first error correction codes; an interleaving step of dividing the n subframes encoded in the first error correction codes, and interleaving at least one selected from units of the overhead information and the transmission information, by l times (l is a given natural number); a second error correction code generation step of generating second error correction codes by encoding the redundant information, and the overhead information and transmission information of the n subframes, which are in the first error correction codes and interleaved in the interleaving step, and adding redundant information for the generated second error correction codes; and an FEC frame generation step of generating an FEC frame by multiplexing the n subframes encoded in the second error correction codes.