Node structure of upgradable wavelength division multiplexing system
AssigneeSamsung Electronics Co., Ltd.
InventorsKwan-Lae Kim, Shin-Hee Won
Life of this patent
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Abstract
Disclosed is a node structure of an upgradeable wavelength division multiplexing system that can minimize the expense in implementing, maintaining, and upgrading the system. The node structure includes an interleaver for interleaving a plurality of optical signals received therein into a predetermined number of channels; at least one demultiplexer coupled to one of the output channels for demultiplexing the optical signals received thereto into a prescribed number of channels; at least one multiplexer for multiplexing the respective demultiplexed optical signals from the demultiplexer; and, a deinterleaver for deinterleaving the optical signals outputted from the multiplexer to be forwarded to the next node.
Claims15
A node system for increasing capacity of a wavelength division multiplexing (WDM) system, said node system comprising:
- means for interleaving a plurality of optical signals received therein into a predetermined number of channels having respective outputs, said means having at least one preliminary output terminal for respectively outputting an output of said outputs;
- at least one demultiplexer respectively coupled to another of said outputs and for demultiplexing said optical signals received via said another of said outputs into a prescribed number of channels;
- at least one multiplexer for multiplexing the respective demultiplexed optical signals outputted from the prescribed channels of said demultiplexer;
- means for deinterleaving the optical signal outputted from said multiplexer to be forwarded to a next node;
- at least one upgrading demultiplexer for demultiplexing the optical signal outputted from the respective preliminary output terminal;
- and at least one upgrading multiplexer for multiplexing the demultiplexed optical signal outputted from the respective upgrading demultiplexer, wherein the preliminary output terminal is without forward connection, is for outputting at least an additional channel for an additional, interleaved optical signal, and is coupled to a respective demultiplexer of the at least one upgrading demultiplexer in the event the system is expanded so as to provide said forward connection.
A node system for increasing the-capacity of a wavelength division multiplexing (WDM) system, said node system comprising:
- means for interleaving a plurality of optical signals received therein into a predetermined number of channels having respective outputs, said means having at least one preliminary output terminal for respectively outputting an output of said outputs;
- a plurality of demultiplexers respectively coupled to others of said outputs and for demultiplexing the respective channel into a prescribed number of channels;
- a plurality of multiplexers for multiplexing the respective demultiplexed optical signals from said plurality of demultiplexers;
- means for deinterleaving said optical signals outputted from said plurality of multiplexers, the output of said deinterleaving to be forwarded to a next node;
- at least one up grading demultiplexer for respectively demultiplexing the optical signals outputted from said at least one preliminary output terminal;
- and at least one upgrading multiplexer for multiplexing the demultiplexed optical signal outputted from the respective upgrading demultiplexer, wherein the preliminary output terminal is without forward connection, is for outputting at least an additional channel for an additional, interleaved optical signal, and is coupled, to a respective demultiplexer of the at least one upgrading demultiplexer in the event the system is expanded so as to provide said forward connection.
A method for increasing the capacity of a wavelength division multiplexing (WDM) system of the type having a pair of interleaver and deinterleaver and at least one pair of multiplexer and demultiplexer disposed between said interleaver and said deinterleaver, the method comprising the steps of:
- upon receiving a plurality of optical signals from different sources by said interleaver, interleaving said received optical signals into a predetermined number of channels;
- demultiplexing, by said demultiplexer, said interleaved optical signals received from the respective said predetermined channel into a prescribed number of channels;
- multiplexing, by said multiplexer, said demultiplexed optical signals received from the respective said prescribed channel of said demultiplexer;
- deinterleaving said multiplexed optical signals into one transmission channel to be forwarded to a next node;
- and, providing the interleaver with an output terminal without forward connection, to which output of at least an additional channel for an additional, interleaved optical signal is to be coupled, for future connection of the terminal to an additional demultiplexer in the event the system is expanded so as to provide said forward connection.
Dependencies are inferred from the claim text.