OPTICAL TRANSMISSION DEVICE AND ITS COMMUNICATION METHOD

PROBLEM TO BE SOLVED: To obtain an optical transmission device that is able to learn a route of an optical signal on a network by transmission and reception of information between neighboring optical transmission devices, to construct an efficient network, and to manage a fault response.SOLUTION: An optical transmission device 60 is comprised of receiving means 61, information generating means 62, storage means 63, determination means 64, and transmitting means 65. The receiving means 61 receives first network information including information on a line on a transmission path, the identifier of a transmission device, its order, and wavelength of an optical signal from a neighboring transmission device. The information generating means 62 generates second network information by adding information on a line with the neighboring transmission device, the identifier of the neighboring transmission device, and wavelength of the optical signal to the first network information. The determination means 64 determines a transmission route of the optical signal and a transmission destination on the basis of the second network information. The transmitting means 65 transmits the optical signal to an optical transmission device which is the transmission destination of the optical signal determined by the determination means 64.