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Optimized colorless, directionless, and contentionless roadm in a module

a colorless, contentionless, and module technology, applied in the field of optical networking, can solve the problem that conventional cdc configurations are less cost effective for smaller degree nodes

Active Publication Date: 2020-04-16
CIENA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes an integrated Reconfigurable Optical Add / Drop Multiplexer (ROADM) degree and add / drop module with a Colorless, Directionless, and Contentionless (CDC) architecture. This module includes a demultiplexer and multiplexer that connect the M common input and output ports with the N add / drop input and output ports. The module can provide both degree-to-degree connectivity and local add / drop of channels using the demultiplexer and multiplexer. The patent also describes a method for utilizing the module in an X degree ROADM node. The technical effect of this invention is to provide a flexible and efficient solution for optical network reconfiguration and management.

Problems solved by technology

Of note, conventional CDC configurations are less cost effective for smaller degree nodes.

Method used

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  • Optimized colorless, directionless, and contentionless roadm in a module
  • Optimized colorless, directionless, and contentionless roadm in a module
  • Optimized colorless, directionless, and contentionless roadm in a module

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Embodiment Construction

[0017]In various embodiments, the present disclosure relates to an optimized Colorless, Directionless, and Contentionless (CDC) Reconfigurable Optical Add / Drop Multiplexer (ROADM) in an integrated module. Specifically, the proposed CDC ROADM described herein provides a small CDC architecture within a single module, e.g., supporting a four degree or less ROADM node. Variously, the CDC architecture proposed herein utilizes a same Wavelength Selective Switch (WSS) module for both degree connectivity and for local add / drop, enabling a single module to support a cost-reduced CDC ROADM. Thus, the switching elements of a CDC architecture is self-contained in the single module, providing cost reduction, less equipment, reduced power consumption, etc. versus a conventional, multi-module CDC architecture. The CDC architecture proposed herein is ideal for smaller degree nodes.

Conventional CDC ROADM Architecture

[0018]FIG. 1 is a block diagram of an example four degree ROADM node 100 utilizing m...

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Abstract

A Reconfigurable Optical Add / Drop Multiplexer (ROADM) node with a Colorless, Directionless, and Contentionless (CDC) architecture, targeting smaller degree nodes, includes an integrated ROADM degree and add / drop module having M common input and output ports and N add / drop input and output ports, wherein the integrated ROADM degree and add / drop module is formed by an M×N demultiplexer Contentionless Wavelength Selective Switch (CWSS) and an M×N multiplexer CWSS; and X degree modules, each having an input and output port connected to common ports of the integrated ROADM degree and add / drop module, a first set of ports of the N add / drop input and output ports are connected for degree-to-degree connectivity and a second set of ports of the N add / drop input and output ports are utilized for local add / drop, such that the integrated module provides both the degree-to-degree connectivity and the local add / drop.

Description

FIELD OF THE DISCLOSURE[0001]The present disclosure generally relates to optical networking. More particularly, the present disclosure relates to systems and methods for an optimized Colorless, Directionless, and Contentionless (CDC) Reconfigurable Optical Add / Drop Multiplexer (ROADM) in an integrated module.BACKGROUND OF THE DISCLOSURE[0002]Optical networks utilize Reconfigurable Optical Add-Drop Multiplexers (ROADMs) to realize selective and reconfigurable add / drop of wavelengths or spectrum locally and between various degrees. ROADMs generally utilize Wavelength Selective Switches (WSSs) in different configurations. Flexibility in add / drop requirements has led to so-called colorless, directionless, and optionally contentionless add / drop multiplexer structures, such as in ROADM devices, nodes, architectures, and structures. A colorless add / drop device supports any wavelength or spectral occupancy / band being added to any port of an add / drop device, i.e., ports are not wavelength sp...

Claims

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Application Information

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IPC IPC(8): H04J14/02H04Q11/00
CPCH04J14/0212H04Q2011/0016H04Q11/0005H04J14/0217H04J14/02122
Inventor CHEDORE, PAULARCHAMBAULT, JEAN-LUC
Owner CIENA