公开(公告)号：US20210344418A1

公开(公告)日：2021-11-04

申请号：US17005873

申请日：2020-08-28

Applicant: Cisco Technology, Inc.

Inventor： Claudio Crognale ,  Giovanni Marenco ,  Davide Sirtori ,  Silvia Turolla

IPC: H04B10/079 ,  H04B10/2507

Abstract: Methods for configuring an optical link with an optimized spectral efficiency are provided. In these methods, a controller of an optical network obtains a baseline configuration that includes a traffic mode that uses a predetermined channel spacing of a plurality of channels in a frequency spectrum. The plurality of channels is used for transmitting optical signals on an optical link in the optical network. The controller further converts the SNR-margin to a Q-margin threshold value associated with a Q-margin as a performance parameter and while maintaining the performance parameter with a predetermined range of the Q-margin threshold value, varies at least one transmission parameter to reduce channel spacing. The controller also generates a spectral frequency map in which the channel spacing is reduced with respect to the baseline configuration and configures, via an optical network element in the optical network, the optical link based on the spectral frequency map.

公开(公告)号：US11381336B2

公开(公告)日：2022-07-05

申请号：US17095515

申请日：2020-11-11

Applicant: Cisco Technology, Inc.

Inventor： Giovanni Marenco ,  Claudio Crognale ,  Davide Sirtori

IPC: H04J14/02 ,  H04B10/27 ,  H04B10/079

Abstract: A method of configuring an optical link with an optimized spectral efficiency and bit rate is provided. The method includes obtaining, by a controller of an optical network, a baseline configuration that includes a traffic mode that uses a predetermined channel spacing of a plurality of channels in a frequency spectrum. The plurality of channels are used for transmitting optical signals on an optical link in the optical network. The method further includes selecting three contiguous channels that include a center channel and two adjacent channels and while maintaining a performance parameter above or equal to a threshold value, moving the adjacent channels closer to the center channel and varying at least one transmission parameter, thereby reducing a spacing of the center channel. As such, a spectral frequency map is generated in which the channel spacing is reduced and an optical link is configured based on the spectral frequency map.

公开(公告)号：US12081272B2

公开(公告)日：2024-09-03

申请号：US17848816

申请日：2022-06-24

Applicant: Cisco Technology, Inc.

Inventor： Giovanni Marenco ,  Claudio Crognale ,  Davide Sirtori

IPC: H04B10/564 ,  H04B10/077 ,  H04B10/079 ,  H04B10/50

CPC classification number: H04B10/564 ,  H04B10/07955 ,  H04B10/0771 ,  H04B10/5057

Abstract: A power tool for obtaining a channel equalization and improving the signal to noise ratio in an amplified optical link. A controller obtains a plurality of optical channel power values for a plurality of channels used for transmitting optical signals on an optical link by a plurality of optical transmitters. The optical channel power values are obtained by monitoring power at an input or an output of an amplifier on the optical link. The controller then determines a power distribution among the plurality of channels based on a maximum optical power and a minimum optical power from the plurality of optical channel power values and generates a plurality of adjusted channel power values by equalizing and scaling the plurality of optical channel power values. The controller configures the plurality of optical transmitters for transmitting the optical signals on the optical link based on the plurality of adjusted channel power values.

公开(公告)号：US20230421266A1

公开(公告)日：2023-12-28

申请号：US17848816

申请日：2022-06-24

Applicant: Cisco Technology, Inc.

Inventor： Giovanni Marenco ,  Claudio Crognale ,  Davide Sirtori

IPC: H04B10/564 ,  H04B10/079

CPC classification number: H04B10/564 ,  H04B10/07955

Abstract: A power tool for obtaining a channel equalization and improving the signal to noise ratio in an amplified optical link. A controller obtains a plurality of optical channel power values for a plurality of channels used for transmitting optical signals on an optical link by a plurality of optical transmitters. The optical channel power values are obtained by monitoring power at an input or an output of an amplifier on the optical link. The controller then determines a power distribution among the plurality of channels based on a maximum optical power and a minimum optical power from the plurality of optical channel power values and generates a plurality of adjusted channel power values by equalizing and scaling the plurality of optical channel power values. The controller configures the plurality of optical transmitters for transmitting the optical signals on the optical link based on the plurality of adjusted channel power values.

公开(公告)号：US11381306B2

公开(公告)日：2022-07-05

申请号：US17005873

申请日：2020-08-28

Applicant: Cisco Technology, Inc.

Inventor： Claudio Crognale ,  Giovanni Marenco ,  Davide Sirtori ,  Silvia Turolla

IPC: H04B10/07 ,  H04J14/02 ,  H04B10/079 ,  H04B10/2507

Abstract: Methods for configuring an optical link with an optimized spectral efficiency are provided. In these methods, a controller of an optical network obtains a baseline configuration that includes a traffic mode that uses a predetermined channel spacing of a plurality of channels in a frequency spectrum. The plurality of channels is used for transmitting optical signals on an optical link in the optical network. The controller further converts the SNR-margin to a Q-margin threshold value associated with a Q-margin as a performance parameter and while maintaining the performance parameter with a predetermined range of the Q-margin threshold value, varies at least one transmission parameter to reduce channel spacing. The controller also generates a spectral frequency map in which the channel spacing is reduced with respect to the baseline configuration and configures, via an optical network element in the optical network, the optical link based on the spectral frequency map.

公开(公告)号：US20210126732A1

公开(公告)日：2021-04-29

申请号：US17095515

申请日：2020-11-11

Applicant: Cisco Technology, Inc.

Inventor： Giovanni Marenco ,  Claudio Crognale ,  Davide Sirtori

IPC: H04J14/02 ,  H04B10/27 ,  H04B10/079

Abstract: A method of configuring an optical link with an optimized spectral efficiency and bit rate is provided. The method includes obtaining, by a controller of an optical network, a baseline configuration that includes a traffic mode that uses a predetermined channel spacing of a plurality of channels in a frequency spectrum. The plurality of channels are used for transmitting optical signals on an optical link in the optical network. The method further includes selecting three contiguous channels that include a center channel and two adjacent channels and while maintaining a performance parameter above or equal to a threshold value, moving the adjacent channels closer to the center channel and varying at least one transmission parameter, thereby reducing a spacing of the center channel. As such, a spectral frequency map is generated in which the channel spacing is reduced and an optical link is configured based on the spectral frequency map.