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).

  • 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
  • Publication number: 20230032707
    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: Application
    Filed: January 6, 2021
    Publication date: February 2, 2023
    Inventors: Choudhury A. Al Sayeed, Yanping Xu, David C. Bownass
  • Patent number: 11569907
    Abstract: 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.
    Type: Grant
    Filed: August 26, 2020
    Date of Patent: January 31, 2023
    Assignee: Ciena Corporation
    Inventors: Edward Chen, Choudhury A. Al Sayeed
  • Patent number: 11553262
    Abstract: 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.
    Type: Grant
    Filed: October 21, 2021
    Date of Patent: January 10, 2023
    Assignee: Ciena Corporation
    Inventors: Choudhury A. Al Sayeed, Edward Chen, David Bownass, Joanne Wakefield
  • Publication number: 20220329341
    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: Application
    Filed: June 28, 2022
    Publication date: October 13, 2022
    Inventors: Choudhury A. Al Sayeed, Edward Chen
  • Patent number: 11456814
    Abstract: Automatic optical link calibration systems and methods include an optical node with an Optical Add-Drop Multiplexer (OADM) multiplexer including a channel holder source; an optical amplifier connected to the OADM multiplexer and to a fiber span; an Optical Channel Monitor (OCM) configured to monitor optical spectrum before and after the optical amplifier; and a controller configured to obtain data associated with the fiber span including measurements from the OCM, determine settings of the channel holder source needed to meet a target launch power profile for the fiber span, and configure the channel holder source based on the determined settings.
    Type: Grant
    Filed: May 10, 2021
    Date of Patent: September 27, 2022
    Assignee: Ciena Corporation
    Inventors: Choudhury A. Al Sayeed, David C. Bownass, David Atkinson, Scott Kohlert
  • Patent number: 11444719
    Abstract: Systems and methods include receiving first power snapshot from a receiving end of a foreign controlled link of the one or more foreign controlled optical links when there are no faults thereon; responsive to obtaining second power snapshot from the receiving end of the foreign controlled link, detecting a fault on one of at least one channel and part of the spectrum traversing the foreign controlled link; correlating the second power snapshot with the first power snapshots; and raising an indication of fault for the foreign controlled link based on the correlating.
    Type: Grant
    Filed: July 1, 2021
    Date of Patent: September 13, 2022
    Assignee: Ciena Corporation
    Inventors: Choudhury A. Al Sayeed, Mark Hinds
  • Publication number: 20220256263
    Abstract: Systems and methods include, responsive to provisioning a media channel (52) on a degree, wherein the media channel (52) 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 (56) in the media channel (50), where M is less than N; causing provisioning of the M channels (56) in the media channel (50); and causing configuration of channel holders in the media channel from a channel holder source (20) for a part of the portion of the optical spectrum unoccupied by the M channels (56).
    Type: Application
    Filed: June 25, 2020
    Publication date: August 11, 2022
    Inventors: Choudhury A. Al Sayeed, Radmila Kovacevic, Edward Chen, David Miedema
  • Publication number: 20220255282
    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: Application
    Filed: February 11, 2021
    Publication date: August 11, 2022
    Inventors: Choudhury A. Al Sayeed, Bing Liu, Damian Flannery, Jean-Luc Archambault
  • Publication number: 20220190949
    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: Application
    Filed: April 8, 2020
    Publication date: June 16, 2022
    Inventors: Choudhury A. Al Sayeed, David C. Bownass, Yanping Xu
  • Publication number: 20220166500
    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: Application
    Filed: November 24, 2020
    Publication date: May 26, 2022
    Inventors: David C. Bownass, Choudhury A. Al Sayeed, Jean-Yves Levesque, Bing Liu
  • Publication number: 20220103284
    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.
    Type: Application
    Filed: August 12, 2021
    Publication date: March 31, 2022
    Inventors: Jean-Luc Archambault, Edward Chen, Paul Chedore, Choudhury A. Al Sayeed, David C. Bownass, David Miedema
  • Publication number: 20220069903
    Abstract: 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.
    Type: Application
    Filed: August 26, 2020
    Publication date: March 3, 2022
    Inventors: Edward Chen, Choudhury A. Al Sayeed
  • Publication number: 20220029702
    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: Application
    Filed: October 11, 2019
    Publication date: January 27, 2022
    Inventors: Choudhury A. Al Sayeed, David Atkinson, Marc De La Durantaye, David W. Boertjes
  • Patent number: 11223423
    Abstract: Systems and methods are provided for re-calibrating an in-service Optical Multiplex Section (OMS) while it is operating in an optical system. A method, according to one implementation, includes a step of analyzing a state of at least one component of the in-service OMS in an optical network, whereby the at least component may include, among other things, one or more fiber spans. Based on a need to re-calibrate the at least one component of the OMS, the method also includes the step of transitioning the OMS from an in-service mode to a maintenance mode to prepare the OMS for re-calibration. At this point, a re-calibration procedure can be performed. In response to completing the re-calibration procedure, the method includes the step of transitioning the OMS from the maintenance mode back to the in-service mode.
    Type: Grant
    Filed: December 22, 2020
    Date of Patent: January 11, 2022
    Assignee: Ciena Corporation
    Inventors: Choudhury A. Al Sayeed, David C. Bownass, Robert Palmer
  • Publication number: 20210328704
    Abstract: Systems and methods include receiving first power snapshot from a receiving end of a foreign controlled link of the one or more foreign controlled optical links when there are no faults thereon; responsive to obtaining second power snapshot from the receiving end of the foreign controlled link, detecting a fault on one of at least one channel and part of the spectrum traversing the foreign controlled link; correlating the second power snapshot with the first power snapshots; and raising an indication of fault for the foreign controlled link based on the correlating.
    Type: Application
    Filed: July 1, 2021
    Publication date: October 21, 2021
    Inventors: Choudhury A. Al Sayeed, Mark Hinds
  • Publication number: 20210281346
    Abstract: Automatic optical link calibration systems and methods include an optical node with an Optical Add-Drop Multiplexer (OADM) multiplexer including a channel holder source; an optical amplifier connected to the OADM multiplexer and to a fiber span; an Optical Channel Monitor (OCM) configured to monitor optical spectrum before and after the optical amplifier; and a controller configured to obtain data associated with the fiber span including measurements from the OCM, determine settings of the channel holder source needed to meet a target launch power profile for the fiber span, and configure the channel holder source based on the determined settings.
    Type: Application
    Filed: May 10, 2021
    Publication date: September 9, 2021
    Inventors: Choudhury A. Al Sayeed, David C. Bownass, David Atkinson, Scott Kohlert
  • Patent number: 11108489
    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 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.
    Type: Grant
    Filed: September 30, 2020
    Date of Patent: August 31, 2021
    Assignee: Ciena Corporation
    Inventors: Jean-Luc Archambault, Edward Chen, Paul Chedore, Choudhury A. Al Sayeed, David C. Bownass, David Miedema
  • Patent number: 11057690
    Abstract: Systems and methods for creating a spectrum assignment for use by an optical network element are provided. In one implementation, an optical network element may include line devices configured to communicate optical signals with external network elements along one or more degrees. The optical network element may also include add/drop devices configured to perform at least one of adding one or more optical channels to the optical signals and removing one or more optical channels to the optical signals. The line devices and add/drop devices are configured to receive control signals from a spectrum management controller, the control signals being configured to allocate a first spectrum assignment for routing the optical signals through the line devices and further configured to allocate a second spectrum assignment for routing the optical signals through the add/drop devices. For example, the second spectrum assignment may be different from the first spectrum assignment.
    Type: Grant
    Filed: November 14, 2019
    Date of Patent: July 6, 2021
    Assignee: Ciena Corporation
    Inventors: Choudhury A. Al Sayeed, Khaled Maamoun
  • Patent number: 11057146
    Abstract: Systems and methods are implemented at an Optical Add/Drop Multiplexer (OADM) node using virtual sections to provide sectional control over an optical link over a foreign-controlled optical network. The systems and methods include obtaining and storing a first power spectral density snapshot of an optical link, from an optical spectrum monitor and when the optical link is in a non-fault condition; responsive to detection of a fault on channels traversing the optical link, obtaining a second power spectral density snapshot at a receiving end of the optical link; analyzing the first power spectral density snapshot and the second power spectral density snapshot; and determining the fault is on the optical link based on the analyzing.
    Type: Grant
    Filed: October 24, 2019
    Date of Patent: July 6, 2021
    Assignee: Ciena Corporation
    Inventors: Choudhury A. Al Sayeed, Mark Hinds