Patent ID: 6449070
Filing Date: 2002-09-10
Classification: H04J

Abstract:
An optical transmission device for a wavelength division multiplexed (WDM) optical transmission system, said optical transmission device comprising:a first part creating a supervisory control signal and transmitting the created supervisory control signal together with an optical main signal, the supervisory control signal including a vector of elements respectively corresponding to wavelengths of the WDM optical transmission system; and a second part receiving a supervisory control signal, different from the transmitted supervisory control signal, from a remote optical transmission device, the received supervisory control signal including a vector, the second part converting the vector included in the received supervisory control signal into another vector via a path matrix in which the vector included in the received supervisory control signal forms diagonal elements, said another vector being transmitted by the optical transmission device to a next stage in the WDM optical transmission system.