Patent ID: 6256125
Filing Date: 2001-07-03
Classification: H04J,H04Q

Abstract:
An optical cross connect type wavelength division multiplexing optical transmission system, comprising:a wavelength-demultiplexing means for receiving a wavelength-multiplexed signal, said wavelength-multiplexed signal including a monitor-signal wavelength component which is multiplexed to a plurality of main-signal wavelength components from several nodes, and for demultiplexing said wavelength-multiplexed signal into wavelength components;an optical switch for outputting said main-signal wavelength components from said wavelength-demultiplexing means to an arbitrary node;a bit-rate-selective type regenerator for conducing regenerative repeating of at least one of said main-signal wavelength components from said optical switch according to a bit rate of said at least one main-signal wavelength component;a monitor signal receiver for receiving and terminating said monitor-signal wavelength component demultiplexed by said wavelength-demultiplexing means;a controller for detecting a bit rate and pass-through node number of each of said main-signal wavelength components based on a signal from said monitor signal receiver, said controller (a) generating a first control signal to control switching of said optical switch to input a main-signal wavelength component into said bit-rate-selective type regenerator for regenerative repeating, said bit-rate-selective type regenerator outputting said regenerative repeated main-signal wavelength component to said optical switch, and (b) outputting a second control signal indicative of a bit rate, pass-through node number and execution/non-execution of regenerative repeating of each of said main-signal wavelength components;a monitor signal transmitter for generating a monitor-signal wavelength component according to said second control signal from said controller; anda wavelength-multiplexing means for multiplexing said main-signal wavelength components output from said optical switch and said monitor-signal wavelength component output from said monitor signal transmitter.