Optical transmission/reception system and optical transmission/reception method

An optical transmission/reception system comprising:

• an optical transmitter having n optical transmission units configured to transmit optical signals;
• and an optical receiver having n optical reception units that are connected to the n optical transmission units via optical transmission paths and configured to receive the n optical signals transmitted via the optical transmission paths,
• wherein the optical transmitter includes
• a frame division unit configured to divide data of a first frame signal framed by adding header information to data into n pieces, replicate the header information by the number of the n divisions, add the replicated header information to head of each piece of n-divided data, add different cyclic redundancy check (CRC) values to end of each data to form a frame, and generate n frame signals that are framed electrical signals,
• the n optical transmission units are configured to convert each of the n frame signals into optical signals having different wavelengths and transmit the optical signals to the optical transmission path,
• the n optical reception units are configured to receive the optical signals of n wavelengths from the optical transmission paths and convert the optical signals into n frame signals of electrical signals,
• the optical receiver includes a frame synthesizing unit configured to determine whether there is a correct CRC value without errors in at least one of the converted n frame signals, and when it is determined that at least one CRC value is correct without errors, the frame synthesizing unit is further configured to synthesize n pieces of data of all the n frame signals with header information of the frame signal of the correct CRC value to generate a second frame signal, and
• wherein n is a positive integer.