Patents by Inventor Choudhury A. AL SAYEED

Choudhury A. AL SAYEED has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11990934
    Abstract: Systems and methods are provided for controlling one or more optical amplifiers of a C+L band photonic line system (30) of a telecommunications network in which C-band signals and L-band signals may be transmitted. In one implementation, a method (130) may execute a traffic managing module (23). When executed, the traffic managing module (23) may be configured to enable a processing device (12) to calculate (132) a gain correction profile based on a difference between a saved baseline transmission profile (84) and a measured transmission profile (94) of a surviving band of a photonic line system (30) when another band of the photonic line system (30) is missing or impacted. The traffic managing module (23) may further be configured to enable the processing device (12) to apply (134) the gain correction profile to a respective optical amplifier (46) of the photonic line system (30) to compensate for the difference.
    Type: Grant
    Filed: January 6, 2021
    Date of Patent: May 21, 2024
    Assignee: Ciena Corporation
    Inventors: Choudhury A. Al Sayeed, Yanping Xu, David C. Bownass
  • Patent number: 11990933
    Abstract: Systems and methods for auto-squelching problematic channels of an optical spectrum and replacing them with Amplified Spontaneous Emission (ASE) channel holders are provided. A method is provided according to one implementation. In response to analyzing optical signals propagating in an optical line system, the method includes the step of determining whether one or more channels of a spectrum of the optical signals are problematic. The one or more problematic channels are determined to be problematic based on the severity of a negative impact that the one or more problematic channels have on spectrum health. The method also includes the step of auto-squelching the one or more problematic channels and replacing the one or more problematic channels with one or more Amplified Spontaneous Emission (ASE) channel holders.
    Type: Grant
    Filed: September 1, 2022
    Date of Patent: May 21, 2024
    Assignee: Ciena Corporation
    Inventor: Choudhury A. Al Sayeed
  • Patent number: 11962401
    Abstract: 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.
    Type: Grant
    Filed: August 12, 2021
    Date of Patent: April 16, 2024
    Assignee: Ciena Corporation
    Inventors: Jean-Luc Archambault, Edward Chen, Paul Chedore, Choudhury A. Al Sayeed, David C. Bownass, David Miedema
  • Publication number: 20240080093
    Abstract: Systems and methods for auto-squelching problematic channels of an optical spectrum and replacing them with Amplified Spontaneous Emission (ASE) channel holders are provided. A method is provided according to one implementation. In response to analyzing optical signals propagating in an optical line system, the method includes the step of determining whether one or more channels of a spectrum of the optical signals are problematic. The one or more problematic channels are determined to be problematic based on the severity of a negative impact that the one or more problematic channels have on spectrum health. The method also includes the step of auto-squelching the one or more problematic channels and replacing the one or more problematic channels with one or more Amplified Spontaneous Emission (ASE) channel holders.
    Type: Application
    Filed: September 1, 2022
    Publication date: March 7, 2024
    Inventor: Choudhury A. Al Sayeed
  • Patent number: 11916590
    Abstract: Systems and methods for compensating for spectrum power offsets with respect to a target profile are provided. A method, according to one implementation, includes determining whether an upstream controller is currently performing an upstream action, or intends to perform the upstream action soon thereafter, with respect to an upstream power compensation unit. The method also includes determining whether there is a need to perform a local action with respect to the local power compensation unit. Furthermore, the method includes the step of performing the local action with respect to the local power compensation unit in response to determining that (a) the upstream controller is not currently performing the upstream action (or does not intend to perform the upstream action soon thereafter) and (b) there is a need to perform the local action.
    Type: Grant
    Filed: November 24, 2021
    Date of Patent: February 27, 2024
    Assignee: Ciena Corporation
    Inventor: Choudhury A. Al Sayeed
  • Patent number: 11902724
    Abstract: 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.
    Type: Grant
    Filed: January 9, 2023
    Date of Patent: February 13, 2024
    Assignee: Ciena Corporation
    Inventors: Choudhury A. Al Sayeed, Edward Chen, David Bownass, Joanne Wakefield
  • Publication number: 20240014917
    Abstract: Systems and methods of capacity changes in an optical network having a plurality of optical sections include, responsive to a request for a capacity change for a plurality of channels, bundling the plurality of channels into different steps such that all of the plurality of channels are assigned to a step of the different steps; and causing implementation of the different steps across the plurality of optical sections, wherein each section performs the implementation and the bundling between corresponding Optical Add/Drop Multiplexer (OADM) nodes independently and asynchronously from one another.
    Type: Application
    Filed: September 25, 2023
    Publication date: January 11, 2024
    Inventors: Choudhury A. Al Sayeed, David C. Bownass, Yanping Xu
  • Patent number: 11870488
    Abstract: Systems and methods include detecting a fast fiber transient on a span based on analyzing power data, wherein the power data is for any of optical wavelengths of traffic channels, optical service channel (OSC) wavelengths, and telemetry from a network element; and responsive to detecting the fast fiber transient, causing an optical time domain reflectometer (OTDR) trace on the span with a specific configuration based on the fast fiber transient.
    Type: Grant
    Filed: February 25, 2022
    Date of Patent: January 9, 2024
    Assignee: Ciena Corporation
    Inventors: Choudhury A. Al Sayeed, Lorenzo Lepore
  • Publication number: 20230412296
    Abstract: Systems and methods for automatic link calibration include subsequent to installation of equipment for the amplified optical section, obtaining power measurements of optical spectrum in the optical section; obtaining properties of fiber in the amplified optical link; analyzing the power measurements and the properties of the fiber to determine settings for the equipment for calibration thereof; and automatically configuring the settings for the equipment. The settings are based on the power measurements and the properties of the fiber to achieve a target launch power per span in the amplified optical section, and wherein the target launch power is based on Optical Signal-to-Noise Ratio (OSNR) and non-linearity in the amplified optical section.
    Type: Application
    Filed: August 29, 2023
    Publication date: December 21, 2023
    Inventors: Choudhury A. Al Sayeed, David C. Bownass, David Atkinson, Scott Kohlert
  • Patent number: 11824581
    Abstract: Systems and methods are provided for creating a sequence of turn-up processes for amplifiers. A method, according to one implementation, includes determining when a fiber span is initially installed in an optical line system or when an Optical Line Failure (OLF) in the fiber span has recovered. The optical line system includes a first set of amplifiers deployed at an upstream node and a second set of amplifiers deployed at a downstream node, the upstream node connected to the downstream node via the fiber span. In response to determining that the fiber span is initially installed in the optical line system or that an ORL in the fiber span has recovered, the method also includes sending a flag from the upstream node to the downstream node to allow the first set of amplifiers to perform a first turn-up process before the second set of amplifiers perform a second turn-up process.
    Type: Grant
    Filed: August 11, 2021
    Date of Patent: November 21, 2023
    Assignee: Ciena Corporation
    Inventors: Choudhury A. Al Sayeed, Song Cao, Na Young Kim
  • Patent number: 11784738
    Abstract: 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.
    Type: Grant
    Filed: June 28, 2022
    Date of Patent: October 10, 2023
    Assignee: Ciena Corporation
    Inventors: Choudhury A. Al Sayeed, Edward Chen
  • Patent number: 11777634
    Abstract: Systems and methods include, responsive to a request for capacity change of X channels, X is an integer >1, on an optical section (14) and at an Optical Add/Drop Multiplexer (OADM) node (12) in an optical network (10), dividing optical spectrum on the optical section into M slots, M is an integer >1, such that the capacity change of X channels takes a maximum of N steps, N is an integer >1; and performing the capacity change of X channels in up to the N steps in an interleaved manner that changes a subset of the X channels in each of the N steps. For each step, the performing can include a maximum of M/N slots of the M slots with spacing between each of the M/N slots not used for the capacity change in a corresponding step. The spacing can be f, (N+f), (2N+f), . . . , M over the optical spectrum, where f is each step, f=1, 2, . . . , N.
    Type: Grant
    Filed: April 8, 2020
    Date of Patent: October 3, 2023
    Assignee: Ciena Corporation
    Inventors: Choudhury A. Al Sayeed, David C. Bownass, Yanping Xu
  • Publication number: 20230275656
    Abstract: Systems and methods include detecting a fast fiber transient on a span based on analyzing power data, wherein the power data is for any of optical wavelengths of traffic channels, optical service channel (OSC) wavelengths, and telemetry from a network element; and responsive to detecting the fast fiber transient, causing an optical time domain reflectometer (OTDR) trace on the span with a specific configuration based on the fast fiber transient.
    Type: Application
    Filed: February 25, 2022
    Publication date: August 31, 2023
    Inventors: Choudhury A. Al Sayeed, Lorenzo Lepore
  • Publication number: 20230208547
    Abstract: Adaptive bundling of capacity changes in an optical section includes, responsive to a request for a capacity change for a plurality of channels on an optical section, determining spectral loading of the optical section; determining a bundling of changes for the capacity change based on the spectral loading of the optical section; and performing the capacity change based on the bundling. The bundling includes a number of steps to achieve all of the capacity change and a maximum allowable amount of optical spectrum that can be changed in each step. The maximum allowable amount of optical spectrum that can be changed in each step can be adaptively determined based on the channel loading.
    Type: Application
    Filed: March 2, 2023
    Publication date: June 29, 2023
    Inventor: Choudhury A. Al Sayeed
  • Patent number: 11658452
    Abstract: Optical line amplifiers with on-board controllers and supervisory devices for controlling optical line amplifiers are provided for controlling bootstrap or power-up procedures when optical line amplifiers are initially installed in an optical communication network. The controllers may include non-transitory computer-readable medium configured to store computer logic having instructions that, when executed, cause one or more processing devices to block an input to one or more gain units of the line amplifier and cause the line amplifier to operate in an Amplified Spontaneous Emission (ASE) mode. In response to a detection of a valid power level of the line amplifier, the instructions can further cause the one or more processing devices to switch the line amplifier from the ASE mode to a regular mode and unblock the input to the one or more gain units of the line amplifier to allow operation of the line amplifier in the regular operating mode.
    Type: Grant
    Filed: February 11, 2021
    Date of Patent: May 23, 2023
    Assignee: Ciena Corporation
    Inventors: Choudhury A. Al Sayeed, Bing Liu, Damian Flannery, Jean-Luc Archambault
  • Patent number: 11652545
    Abstract: Systems and methods for avoiding fiber damage of an optical fiber link are provided. A method, according to one implementation, includes monitoring optical signals transmitted along an optical fiber link from an output port of a first card to an input port of a second card. In response to detecting a fiber disconnection state when an amplifier of the first card is operating in a normal condition, the amplifier of the first card enters a forced Automatic Power Reduction (APR) condition. In addition to potentially reducing the risk of eye damage from laser light emitted from the optical fiber link, the forced APR condition is configured to allow for an uninterrupted debugging procedure. Also, the method includes returning the amplifier of the first card from the forced APR condition back to the normal operating condition after receiving an indication that the fiber disconnection state has cleared.
    Type: Grant
    Filed: November 24, 2020
    Date of Patent: May 16, 2023
    Assignee: Ciena Corporation
    Inventors: David C. Bownass, Choudhury A. Al Sayeed, Jean-Yves Levesque, Bing Liu
  • Patent number: 11637635
    Abstract: Systems and methods for calibrating a Raman amplifier in a photonic line system of an optical network are provided. A method, according to one implementation, includes the step of setting the gain of a plurality of pump lasers of a Raman amplifier to a safe level. For example, the pump lasers are configured to operate at different wavelengths. Also, the Raman amplifier is connected to a fiber span having a specific fiber-type. The safe can be defined as a level that keeps adverse intermodulation effects below a predetermined threshold regardless of the specific fiber-type. In addition, the method includes the step of increasing the gain of the pump lasers without prior knowledge of the specific fiber-type of the fiber span while keeping the adverse intermodulation effects below the predetermined threshold.
    Type: Grant
    Filed: December 7, 2021
    Date of Patent: April 25, 2023
    Assignee: Ciena Corporation
    Inventor: Choudhury A. Al Sayeed
  • Patent number: 11632171
    Abstract: Systems and methods of optical restoration include, with a photonic service (14), in an optical network (10, 100), operating between two nodes (A, Z) via an associated optical modem (40) at each node, wherein each modem (40) is capable of supporting variable capacity, C1, C2, . . . , CN where C1>C2> . . . >CN, detecting a fault (16) on a home route of the photonic service (14) while the photonic service (14) operates at a home route capacity CH, CH is one of C1, C2, . . . , CN?1; downshifting the photonic service (14) to a restoration route capacity CR, CR is one of C2, C3 . . . , CN and CR<CH; switching the photonic service (14) from the home route to a restoration route (18) while the photonic service (14) operates at a restoration route capacity CR; and monitoring the photonic service (14) and copropagating photonic services during operation on the restoration route (18) at the restoration route capacity CR for an upshift of the photonic service (14).
    Type: Grant
    Filed: October 11, 2019
    Date of Patent: April 18, 2023
    Assignee: Ciena Corporation
    Inventors: Choudhury A. Al Sayeed, David Atkinson, Marc De La Durantaye, David W. Boertjes
  • Publication number: 20230116474
    Abstract: Systems and methods include, responsive for a requirement to calibrate a single span in a multi-span optical line system where the single span includes a from-end node and a to-end node, determining no other upstream node in the multi-span optical multiplex section is currently calibrating or faulted; responsive to no other upstream node currently calibrating or faulted, calibrating the from-end node with a new target launch power into a fiber associated with the single span; and calibrating the to-end node keeping target launch power into a fiber associated with an immediate downstream span from the single span uninterrupted from a previous calibration. The to-end node and the from-end node are each (1) an intermediate line amplifier or (2) a terminal node and an intermediate line amplifier, in the multi-span optical line system.
    Type: Application
    Filed: December 13, 2022
    Publication date: April 13, 2023
    Inventor: Choudhury A. Al Sayeed
  • Publication number: 20230053180
    Abstract: Systems and methods are provided for creating a sequence of turn-up processes for amplifiers. A method, according to one implementation, includes determining when a fiber span is initially installed in an optical line system or when an Optical Line Failure (OLF) in the fiber span has recovered. The optical line system includes a first set of amplifiers deployed at an upstream node and a second set of amplifiers deployed at a downstream node, the upstream node connected to the downstream node via the fiber span. In response to determining that the fiber span is initially installed in the optical line system or that an ORL in the fiber span has recovered, the method also includes sending a flag from the upstream node to the downstream node to allow the first set of amplifiers to perform a first turn-up process before the second set of amplifiers perform a second turn-up process.
    Type: Application
    Filed: August 11, 2021
    Publication date: February 16, 2023
    Inventors: Choudhury A. Al Sayeed, Song Cao, Na Young Kim