公开(公告)号：US20250096891A1

公开(公告)日：2025-03-20

申请号：US18466901

申请日：2023-09-14

Applicant: Cisco Technology, Inc.

Inventor： Alberto Arnaldo Tanzi ,  Giovanni Osnago ,  Maurizio Gazzola

IPC: H04B10/079

Abstract: An optical network element detects an input optical signal at a preamplifier input and sets an output power level of the preamplifier at a predetermined Automatic Power Reduction (APR) power level. The optical network element starts an APR timer that expires after a first predetermined time period. While the APR timer is running, the optical network element measures an input power level of the input optical signal and calculates a span loss as a function of the difference between the predetermined APR power level and the measured input power level. After the expiration of the APR timer, the optical network element adjusts the output power level of the preamplifier output based on the calculated span loss.

公开(公告)号：US20190379480A1

公开(公告)日：2019-12-12

申请号：US16449618

申请日：2019-06-24

Applicant: Cisco Technology, Inc.

Inventor： Alberto Arnaldo Tanzi ,  Stefano Piciaccia ,  Maurizio Gazzola ,  Lorenzo Ghioni

IPC: H04J14/02 ,  H04Q11/00 ,  H04B10/079

Abstract: A network controller controls optical nodes configured to communicate with each other at multiple line rates using different tuples of [bits/symbol, symbol rate] for each line rate. The network controller determines multiple paths between two optical nodes, selects a desired line rate at which to communicate between the two optical nodes, and accesses a path database that indicates an available optical bandwidth and an available optical signal-to-noise ratio (SNR) along each path. The network controller determines feasible paths among the paths. To do this, the network controller, for each path, searches the different tuples of the desired line rate for a tuple for which a desired optical bandwidth and a desired optical SNR are accommodated by the available optical bandwidth and the available optical SNR of the path, respectively. The network controller programs optical nodes of one of the feasible paths with a tuple found in the searching.

公开(公告)号：US10374745B1

公开(公告)日：2019-08-06

申请号：US16003352

申请日：2018-06-08

Applicant: Cisco Technology, Inc.

Inventor： Alberto Arnaldo Tanzi ,  Stefano Piciaccia ,  Maurizio Gazzola ,  Lorenzo Ghioni

IPC: H04J14/00 ,  H04J14/02 ,  H04B10/079 ,  H04Q11/00

Abstract: A network controller controls optical nodes configured to communicate with each other at multiple line rates using different tuples of [bits/symbol, symbol rate] for each line rate. The network controller determines multiple paths between two optical nodes, selects a desired line rate at which to communicate between the two optical nodes, and accesses a path database that indicates an available optical bandwidth and an available optical signal-to-noise ratio (SNR) along each path. The network controller determines feasible paths among the paths. To do this, the network controller, for each path, searches the different tuples of the desired line rate for a tuple for which a desired optical bandwidth and a desired optical SNR are accommodated by the available optical bandwidth and the available optical SNR of the path, respectively. The network controller programs optical nodes of one of the feasible paths with a tuple found in the searching.

公开(公告)号：US10476588B2

公开(公告)日：2019-11-12

申请号：US15952345

申请日：2018-04-13

Applicant: Cisco Technology, Inc.

Inventor： Maurizio Gazzola ,  Stefano Piciaccia ,  Lorenzo Ghioni ,  Ronald Johnson ,  Alberto Arnaldo Tanzi ,  Sushin Suresan Adackaconam

IPC: H04B10/075 ,  H04B10/073 ,  H04J14/02

Abstract: Techniques for automatic bandwidth optimization of an optical communication channel in an optical network are provided. In one embodiment, a method of automatically optimizing bandwidth includes receiving, at a first optical network element, a first signal transmission transmitted according to a first set of transmission parameters over an optical communication channel established between the first optical network element and a second optical network element. The method includes determining a first quality of signal parameter associated with the first signal transmission and determining whether the first quality of signal parameter is worse than a predetermined quality of signal value. Upon determining that the first quality of signal parameter is not worse than the predetermined value, the method further includes transmitting a second set of transmission parameters to the second optical network element to further optimize the bandwidth of the optical communication channel.

公开(公告)号：US10686546B2

公开(公告)日：2020-06-16

申请号：US16449618

申请日：2019-06-24

Applicant: Cisco Technology, Inc.

Inventor： Alberto Arnaldo Tanzi ,  Stefano Piciaccia ,  Maurizio Gazzola ,  Lorenzo Ghioni

IPC: H04J14/00 ,  H04J14/02 ,  H04B10/079 ,  H04Q11/00

Abstract: A network controller controls optical nodes configured to communicate with each other at multiple line rates using different tuples of [bits/symbol, symbol rate] for each line rate. The network controller determines multiple paths between two optical nodes, selects a desired line rate at which to communicate between the two optical nodes, and accesses a path database that indicates an available optical bandwidth and an available optical signal-to-noise ratio (SNR) along each path. The network controller determines feasible paths among the paths. To do this, the network controller, for each path, searches the different tuples of the desired line rate for a tuple for which a desired optical bandwidth and a desired optical SNR are accommodated by the available optical bandwidth and the available optical SNR of the path, respectively. The network controller programs optical nodes of one of the feasible paths with a tuple found in the searching.

公开(公告)号：US20190319702A1

公开(公告)日：2019-10-17

申请号：US15952345

申请日：2018-04-13

Applicant: Cisco Technology, Inc.

Inventor： Maurizio Gazzola ,  Stefano Piciaccia ,  Lorenzo Ghioni ,  Ronald Johnson ,  Alberto Arnaldo Tanzi ,  Sushin Suresan Adackaconam

IPC: H04B10/075 ,  H04B10/073 ,  H04J14/02

Abstract: Techniques for automatic bandwidth optimization of an optical communication channel in an optical network are provided. In one embodiment, a method of automatically optimizing bandwidth includes receiving, at a first optical network element, a first signal transmission transmitted according to a first set of transmission parameters over an optical communication channel established between the first optical network element and a second optical network element. The method includes determining a first quality of signal parameter associated with the first signal transmission and determining whether the first quality of signal parameter is worse than a predetermined quality of signal value. Upon determining that the first quality of signal parameter is not worse than the predetermined value, the method further includes transmitting a second set of transmission parameters to the second optical network element to further optimize the bandwidth of the optical communication channel.