Patent ID: 6320684
Filing Date: 2001-11-20
Classification: H04J,H04Q

Abstract:
A wavelength division multiplexing optical transmission system, comprising:a wavelength-demultiplexing means for receiving a wavelength-multiplexed signal that a monitor-signal wavelength component is multiplexed to a plurality of main-signal wavelength components and demultiplexing said wavelength-multiplexed signal into wavelength components;an optical switch for receiving said main-signal wavelength components demultiplexed by said wavelength-demultiplexing means and switching into either one of routes to output directly and to output through a bit-rate-selective type regenerator for each of said main-signal wavelength components;said bit-rate-selective type regenerator for conducting the regenerative repeating to a signal input through said optical switch according to the bit rate and then returning it to said optical switch;a monitor signal receiver for receiving and terminating said monitor-signal wavelength component demultiplexed by said wavelength-demultiplexing means;a controller for detecting the bit rate and pass-through node number of each of said main-signal wavelength components by receiving a signal from said monitor signal receiver, generating a control signal to control the switching of said optical switch and the regenerative repeating of said bit-rate-selective type regenerator, and rewriting information to show the bit rate, pass-through node number and execution/non-execution of regenerative repeating of each of said main-signal wavelength components to be output to the next-stage node;a monitor signal transmitter for receiving said information rewritten by said controller and generating a monitor-signal wavelength component; 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.