Ciena Corporation

Dave C Bownass

Choudhury A Al Sayeed

David W Boertjes

David Miedema

Dominic Richens

Loren Berg

Dave Atkinson

Vipul Bhatnagar

Edward Chen

Scott Kohlert

Loren S Berg

Darren Hennigar

Mohammad Mehdi Mansouri Rad

Pre-programming Layer-0 optical protection path restoration speeds is provided based on available path margin. Higher layer routers and switches can be made aware of the expected Layer-0 restoration time, and their switch time can be programmed accordingly. The proposed method can provide users an option to program a restoration speed for a specific photonic service on a per restoration path basis. The method can highlight which services will potentially be impacted by the selected restoration speed on that path. The user can proceed with the selected speed for restoring high priority layer-0 services even if that means the fast restoring event can potentially impact other low priority services already in-service on the restoration path.

Methods and apparatus for pre-programming layer-0 service turn up speeds for photonic service provisioning or restoration

Systems and methods describe synchronizing optical protection switching with an Optical Protection Switch (OPS) including a splitter on a transmit side to both a first fiber path and a second fiber path and a receive switch and monitoring port on a receive side with the receive switch set to only one of the first fiber path and the second fiber path. A method includes, responsive to detection of a fault on the first fiber path, generating a link Forward Defect Indication (FDI) and transmitting the link FDI over a messaging channel downstream; and utilizing the link FDI to generate an Optical Protection Switch Indicator (OPSI) status used by the OPS to cause a switch of the receive switch to the second fiber path.

Synchronization of optical protection switching and loading of path specific characteristics

Systems and methods for an optical controller in an optical network for photonic control include monitoring signal output of the optical controller for fluctuations on a signal, wherein the optical controller may operate with one or more upstream optical controllers in the optical network which may cause the fluctuations; and initiating a control loop by the optical controller on the signal based on the monitored fluctuations. The initiating is based on one or more thresholds used to differentiate actions of the one or more upstream optical controllers of the plurality of optical controllers from one or more of fiber faults, natural fluctuations in fiber plant, and natural fluctuations in hardware.

Systems and methods for a preemptive controller for photonic line systems

Systems and methods for modeling non-visible optical sources in a spectrum controller for control thereof include receiving channel routing information and signal characteristics for the non-visible channels separately from visible channels, wherein the visible channels are formed by optical transceivers communicatively coupled to the spectrum controller and the non-visible channels are formed by optical transceivers without communication to the spectrum controller; utilizing a combination of the channel routing information and signal characteristics for both the visible channels and the non-visible channels as input to the spectrum controller; performing control of optical spectrum based on the input; and providing output adjustments based on the control.

Systems and methods modeling optical sources in optical spectrum controllers for control thereof

A method for optical dark section conditioning includes determining a section in an optical network is a dark section that includes connected fiber spans that are functional with no traffic carrying channels present thereon; and causing generation of at least one of broadband noise and a signal at a head end of the dark section. An apparatus configured to perform optical dark section conditioning includes logic configured to determine a section in an optical network is a dark section that includes connected fiber spans that are functional with no traffic carrying channels present thereon; and logic configured to cause generation of at least one of broadband noise and a signal at a head end of the dark section.

Systems and methods for optical dark section conditioning

A method, a controller, and an optical section include performing an analysis to determine an amount of power offset on any in-service channels in an optical section due to a capacity change with a channel; defining a step size to ensure the capacity change does not exceed an offset limit based on the analysis; performing the capacity change in one or more iterations using the step size to limit the capacity change; and performing an optimization between each of the one or more iterations to adjust amplifier gains in the optical section to compensate for offsets on the in-service channels caused by a previous iteration.

Systems and methods for capacity changes in DWDM networks including flexible spectrum systems

Embodiments of the disclosure are directed to optical dark section conditioning. An embodiment generates at least one of a broadband noise or signal at the head end of a section for a first module of the section; and operates all other modules of the section in gain control mode.

Growing community of inventors

Ottawa, Canada

Dave C Bownass