Method of control for the maintenance of the optical power in a ROADM network

Patent metadata

Field	Value
Publication number	US-10727936-B2
Application number	US-201816228410-A
Country	US
Kind code	B2
Filing date	Dec 20, 2018
Priority date	Feb 2, 2017
Publication date	Jul 28, 2020
Grant date	Jul 28, 2020

Abstract

Methods, systems, and optical power controllers are disclosed. Various problems caused by the use of a single L0 power controller in the prior art are addressed by using first and second L0 power controllers with the first L0 power controller managing first optical components with the optical network, and the second L0 power controller managing second optical components within the optical network.

First claim

What is claimed is:

1. A method comprising the steps of:
receiving, by circuitry of a software defined network L0 network controller, dependency information indicative of power control dependencies between individual optical signals including optical carriers, reconfigurable optical add drop multiplexer nodes, and an in-line optical amplifier of an optical transmission line between the reconfigurable optical add drop multiplexer nodes in a reconfigurable optical add drop multiplexer network;
determining a deviation in optical channel power of a first optical signal of the optical signals by the software defined network L0 network controller monitoring optical power control parameters at target locations within the reconfigurable optical add drop multiplexer network as compared to target parameters;
upon determination of the deviation, accessing the dependency information for an optical path carrying the first optical signal, and determining a starting point for optical power repairs at a location within the optical path upstream from a first component within the optical path; and
configuring a second component within the optical path by the software defined network L0 network controller from the starting point to restore optical power within the reconfigurable optical add drop multiplexer network,
wherein the software defined networking L0 network controller is programmed with a first control loop monitoring optical power control parameters of a transmitter, a second control loop monitoring the first and second optical components, and a third control loop monitoring an optical receiver,
wherein the first control loop and the second control loop are associated with a hierarchy such that the first control loop and the second control loop are related within the software defined network L0 network controller based upon a dependency matrix, the hierarchy determining the sequence of execution of the first control loop and the second control loop.

2. The method of claim 1 , wherein determining the starting point is defined further as backtracking the optical path from the first component using the dependency information.

3. The method of claim 1 , wherein the reconfigurable optical add drop multiplexer network includes multiple optical paths and the dependency information includes a dependency matrix for each of the multiple paths.

4. The method of claim 1 , wherein the software defined network L0 network controller configures the second component and the first component in a serial manner starting at the starting point to restore optical power within the reconfigurable optical add drop multiplexer network.

5. A transport network comprising:
an optical transmitter;
an optical receiver;
a plurality of optical components forming an optical path between the optical transmitter and the optical receiver;
a database storing optical power control parameters for the optical transmitter, the optical receiver, and the optical components forming the optical path between the optical transmitter and the optical receiver, and dependency information indicative of power control dependencies between the optical transmitter, the optical components and the optical receiver;
a software defined networking L0 network controller monitoring optical power control parameters of the transmitter, the optical components and the optical receiver compared to target parameters, upon determining a deviation of the optical power control parameters as compared to the target parameters, configuring a power repair to at least one of the optical components upstream from a location of the deviation using the dependency information,
wherein the software defined network L0 network controller is programmed with a first control loop monitoring optical power control parameters of the transmitter, a second control loop monitoring the optical components, and a third control loop monitoring the optical receiver,
wherein the first control loop and the second control loop are heirachial related within the software defined network L0 network controller based upon the dependency matrix, the hierarchy determining the sequence of execution of the first control loop and the second control loop.

6. The transport network of claim 5 , wherein the software defined networking L0 network controller configures power repairs to multiple optical components in a serial manner upstream from the location of the deviation using the dependency information.

7. The transport network of claim 5 , wherein upon determination of the deviation, the software defined networking L0 network controller accesses the dependency information for the optical path and determines a starting point for optical power repairs upstream from the location of the deviation using the dependency information.

8. A transport network comprising:
a plurality of optical components forming an optical path between an optical transmitter and an optical receiver;
a database storing optical power control parameters for the optical components forming the optical path between the optical transmitter and the optical receiver, and dependency information indicative of power control dependencies between the optical components;
a software defined networking L0 network controller monitoring optical power control parameters of the optical components compared to target parameters, upon determining a deviation of the optical power control parameters as compared to the target parameters, configuring a power repair to at least one of the optical components upstream from a location of the deviation using the dependency information,
wherein the software defined network L0 network controller is programmed with a first control loop monitoring optical power control parameters of a transmitter, a second control loop monitoring first and second optical components of the plurality of components, and a third control loop monitoring an optical receiver, the transmitter and receiver being third and fourth ones of the plurality of optical components,
wherein the first control loop and the second control loop are associated with a hierachy such that the first control loop and the second control loop are related within the software defined network L0 network controller based upon a dependency matrix, the hierachy determining the sequence of execution of the first control loop and the second control loop.

9. The transport network of claim 8 , wherein the software defined networking L0 network controller configures power repairs to multiple optical components in a serial manner upstream from the location of the deviation using the dependency information.

10. The transport network of claim 8 , wherein upon determination of the deviation, the software defined networking L0 network controller accesses the dependency information for the optical path and determines a starting point for optical power repairs upstream from the location of the deviation using the dependency information.

Assignees

• Infinera Corp

Inventors

• Yilmaz Omer F
• St-Laurent Stephane
• Sanders Steve
• Mitchell Matthew L

Classifications

• H04L43/08

  Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters · CPC title

• H04L43/20

  the monitoring system or the monitored elements being virtualised, abstracted or software-defined entities, e.g. SDN or NFV · CPC title

• H04L41/122

  of virtualised topologies, e.g. software-defined networks [SDN] or network function virtualisation [NFV] · CPC title

• H04L41/0894

  Policy-based network configuration management · CPC title

• H04L41/40

  using virtualisation of network functions or resources, e.g. SDN or NFV entities · CPC title