Ciena Corporation

Edward Chen

Choudhury A Al Sayeed

David Miedema

Anurag Prakash

David Casson Bownass

David W Boertjes

Gerard Leo Swinkels

Paul Chedore

Dominic Richens

Trevor John Ibach

Radmila Kovacevic

Jean-Luc Archambault

Bruno Doyle

Joanne Wakefield

Scott Kohlert

Dave C Bownass

Robert Palmer

Ran Tang

Andrew Croskery

Rejean Tremblay

Choudhury A Al-Sayeed

A Reconfigurable Optical Add/Drop Multiplexer (ROADM) includes degree components where there are one or more Media Channels (MCs) configured thereon; multiplexer and demultiplexer components; and a controller configured to, responsive to a request for a loopback test on Network Media Channel (NMC) that is part of a configured Media Channel (MC), determine whether there are neighboring channels to the NMC, configure deadbands on optical spectrum based on the determining, cause configuration of a modem for the loopback test, and cause performance of the loopback test with the modem.

Bandwidth optimization for connection validation in pre-occupied spectrum

Systems and methods include, responsive to provisioning a media channel () on a degree, wherein the media channel () is a contiguous portion of optical spectrum supporting N channels, N is greater than 1, causing allocation of optical filter bandwidth in an optical multiplexing/demultiplexing device for M channels () in the media channel (), where M is less than N; causing provisioning of the M channels () in the media channel (); and causing configuration of channel holders in the media channel from a channel holder source () for a part of the portion of the optical spectrum unoccupied by the M channels ().

Partial activation of a media channel on channel holder-based optical links

Systems and methods for conducting various types of Connection Validation (CV) are provided for reducing the overall CV scan time of regular CV scans. A Reconfigurable Optical Add/Drop Multiplexer (ROADM), according to one implementation includes at least one degree component; at least one add/drop component; a plurality of fibers interconnecting the at least one degree component and/or the at least one add/drop component; and a controller configured to, responsive to any of ongoing operation and connection of one or more fibers of the plurality of fibers, cause a Connection Validation (CV) scan in the ROADM that cycles through the one or more fibers, attain a desired cycle time for the CV scan through one or more techniques, and determine one or more of connectivity and whether fiber loss is within expectations, based on the CV scan.

Reducing connection validation (CV) time in an optical node

Systems and methods for resolving control conflicts in trunk protection links are provided. A head-end node includes a first line-mux controller and a second line-mux controller, first actuator components for a first fiber span, and second actuator components for a second fiber span, wherein the first line-mux controller and the second line-mux controller are configured to control the first actuator components and the second actuator components, respectively, and a trunk protection switch configured to connect an input to each of the first fiber span and the second fiber span.

Resolving control conflicts among trunk protection links

Differentiating traffic signals from filler channels in optical networks includes obtaining power measurements of optical spectrum on an optical section in the optical network; analyzing the power measurements to differentiate signal type between traffic signals and Amplified Stimulated Emission (ASE) channel holders; and applying appropriate treatment to the optical spectrum based on the signal type. The analyzing is performed locally without any notification from upstream nodes of the optical spectrum.

Differentiating traffic signals from filler channels in optical networks and band augmentation

Systems, methods, and computer-readable media are provided for signaling the presence of a fault in a multi-band optical network or other communication system. In response to a detected fault in a multi-band communication system impacting a specific band of the multi-band communication system, a method, according to one implementation, may include a step of creating a fault signal corresponding to the detected fault. The method may also include the step of conveying the fault signal to at least one of an upstream controller and a downstream controller of the multi-band communication system to trigger an action for handling the fault on the specific band. The action may be handled independently of other actions associated with one or more other bands of the multi-band communication system.

Per-band fault signaling in a multi-band optical transmission system

Systems and methods for resolving control conflicts in trunk protection links are provided. A method, in one implementation, includes identifying control conflicts among Network Elements (NEs) in an Optical Multiplex Section (OMS). The OMS may have a plurality of trunk protection links arranged in parallel and a plurality of Trunk Protection Switches (TPSs). Also, the trunk protection links and TPSs are configured to create a distributed 1:N trunk protection arrangement. The method also includes resolving the control conflicts by auto-negotiating a primary instance associated with enabling a first set of control actions to be conducted along a primary path in the OMS and auto-negotiating one or more follower instances associated with enabling a second set of control actions to be conducted along one or more secondary paths in the OMS subsequent to the first set of control actions.

In a distributed system with a microservice architecture having a framework supporting a messaging layer between client applications and server-side handlers, systems and methods include receiving a message by a server-side handler in the framework with the message one of blocking and non-blocking from a client application; handling the message by the server-side handler as one of blocking and non-blocking selected independent of a designation by the client application since the framework abstracts the messaging layer from the client application; and providing a response by the server-side handler to the client application.

Normalizing messaging flows in a microservice architecture

Systems and methods for conducting various types of Connection Validation (CV) are provided for reducing the overall CV scan time of regular CV scans. A method, according to one implementation, includes a step of receiving a request to perform a focused CV on one or more communication cables after the one or more communication cables are physically connected or reconnected into a portion of a network. The method also includes the steps of interrupting an ongoing CV running in the portion of the network and executing the focused CV to target a CV scan on the one or more communication cables.

A processor-implemented method implemented to model devices in a network utilizing an assembly providing an arbitrary model includes utilizing one or more first models to represent relationships between devices in the network for control and management thereof, wherein the one or more first models are implemented in an associated database of one or more databases each with an associated schema; defining an assembly to implement the arbitrary model different from the first model, wherein the assembly comprises pointers to data instances in the one or more databases; and utilizing the arbitrary model for control and management of the devices in the network, wherein the control and management via the arbitrary model updates the data instances in the one or more databases representing the first model.

Data structures representing models of networking equipment and methods of network management employing thereof

A controller includes a processor; and memory storing instructions that, when executed, cause the processor to obtain measurements of optical spectrum from an Optical Power Monitor (OPM) connected to a fiber having thereon, one or more optical signals from one or more optical transmitters, wherein the optical signals are based on a flexible grid, manage the one or more optical signals utilizing a first model and manage attenuation control granularity of a Wavelength Selective Switch (WSS) connected to the fiber utilizing a second model, and configure one or more of the WSS and the one or more optical transmitters based on the first model and the second model.

Management of flexible grid and supercarriers in optical networks using a data model

Systems and methods include obtaining power measurements from one or more first components in an optical node and store the power measurements at corresponding vertices in a graph that describes the optical node; obtaining calibration data from a plurality of second components in the optical node and utilize the calibration data to determine an optical gain or an optical loss through an associated arc in the graph; and determining an optical power at any point in the optical node via traversing the graph, for any of configuration and operation of the optical node. The graph includes the vertices that are points in the optical node where there is a need for optical power, the arcs that are connections through the optical node where the optical power has the optical gain or the optical loss, and optical channels and their associated optical spectrum.

Dynamic data-driven power scaling in an optical node and network

An optical network element includes an optical multiplexing/demultiplexing device forming a degree; a channel holder source connected to the optical multiplexing/demultiplexing device; and a controller configured to, responsive to provisioning a media channel on the degree, wherein the media channel is a contiguous portion of optical spectrum supporting N channels, N&#x3e;1, cause allocation of optical filter bandwidth in the optical multiplexing/demultiplexing device for M channels in the media channel, M&#x3c;N, cause provisioning of the M channels in the media channel, and cause configuration of N&#x2212;M channel holders in the media channel from the channel holder source.

A method of managing an optical service in a node utilizing a flexible grid for optical spectrum includes utilizing a Media Channel (MC) model to manage a portion of optical spectrum on an optical line, the MC model includes first frequency information which define the portion of optical spectrum; utilizing a Network Media Channel (NMC) model to manage the optical service and to model a path of the optical service in the MC model, the NMC model has frequency information and port connection information for the optical service; and programming hardware in the node based on the MC model and the NMC model to implement the optical service.

A method of managing optical services in a node in an optical network utilizing a flexible grid includes utilizing a Media Channel (MC) Trail Termination Point (TTP) to model frequency allocation of a MC on the node; utilizing a Network Media Channel (NMC) Connection Termination Point (CTP) to model a specific port for an optical channel corresponding to the NMC; utilizing a NMC cross connection (CRS) to model a path of the NMC in the MC; and programming hardware in the node based on the MC TTP, the NMC CTP, and the NMC CRS.

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Kanata, Canada

Edward Chen