Optical communication system and optical communication method

An optical communication method in an optical communication system comprising a signal processing apparatus and a wireless apparatus between which functions of a base station are divided, the signal processing apparatus and the wireless apparatus each comprising a transmission unit and a reception unit, a periodic symbol sequence comprising a cyclic prefix appended to a signal of a predetermined size to which an IFFT (Inverse Fast Fourier Transform) has been applied being transmitted between the signal processing apparatus and the wireless apparatus by means of digital RoF (Radio over Fiber) transmission;

• the optical communication method comprising:
• a compression size determination step, performed by the transmission unit, of acquiring symbol information relating to a starting position of the symbol sequence and lengths of symbols constituting the symbol sequence, and determining, based on the acquired symbol information, a compression size for each of symbols that are to be compressed;
• a compression step, performed by the transmission unit, of compressing the symbol sequence in units of determined compression sizes;
• an expansion size determination step, performed by the reception unit, of determining an expansion size for each of symbols in the symbol sequence that are to be expanded;
• and
• an expansion step, performed by the reception unit, of expanding the symbol sequence in units of determined expansion sizes.