Patent ID: 9088383
Filing Date: 2015-07-21
Classification: H04J,H04L

Abstract:
1. A transmitting apparatus used in an electrical frequency division multiplex transmission system comprising plural nodes that are on an optical transmission path and that respectively frequency-multiplex a sub-carrier of a unique frequency and a carrier wave to transmit information to a receiving apparatus on the optical transmission path, the transmitting apparatus being disposed in each of the nodes and comprising: a determining unit that receives an input of information concerning unused sub-carriers of a transmission signal in the optical transmission path and determines transmission of the information to the receiving apparatus using an unused sub-carrier; an electrical frequency division multiplex transmission unit that using a frequency of the unused sub-carrier determined by the determining unit, modulates the input information to be transmitted to the receiving apparatus; and a coupling unit that adds to the transmission signal in the optical transmission path, a modulation signal modulated by the electrical frequency division multiplex transmission unit, wherein the determining unit determines assignment of the input information to plural unused sub-carriers, based on the information concerning the unused sub-carriers, the electrical frequency division multiplex transmission unit modulates the input information using frequencies of the unused sub-carriers determined by the determining unit, and the coupling unit adds to the transmission signal in the optical transmission path, plural sub-carrier modulation signals modulated by the electrical frequency division multiplex transmission unit.