公开(公告)号：US20190379480A1

公开(公告)日：2019-12-12

申请号：US16449618

申请日：2019-06-24

申请人： Cisco Technology, Inc.

发明人： Alberto Arnaldo Tanzi ,  Stefano Piciaccia ,  Maurizio Gazzola ,  Lorenzo Ghioni

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

摘要： 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

申请人： Cisco Technology, Inc.

发明人： Alberto Arnaldo Tanzi ,  Stefano Piciaccia ,  Maurizio Gazzola ,  Lorenzo Ghioni

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

摘要： 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

申请人： Cisco Technology, Inc.

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

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

摘要： 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：US09917412B1

公开(公告)日：2018-03-13

申请号：US15343785

申请日：2016-11-04

申请人： Cisco Technology, Inc.

发明人： Stefano Piciaccia ,  Lorenzo Ghioni ,  Walid Wakim

IPC分类号： H01S3/30 ,  H01S3/106 ,  H01S3/094 ,  H01S3/067 ,  H01S3/16

CPC分类号： H01S3/1065 ,  H01S3/06754 ,  H01S3/06758 ,  H01S3/06762 ,  H01S3/06766 ,  H01S3/094003 ,  H01S3/1608 ,  H01S2301/02

摘要： An optical amplifier may comprise a first gain stage and a second gain stage. Each of the first and second gain stages may comprise a laser pump and an active fiber. A liquid crystal device may be coupled between an output of the first gain stage and an input of the second gain stage. A control unit may be coupled to the first and second gain stages, liquid crystal device and configured to control the first and second gain stages, and the liquid crystal device to provide a switchable gain. Light may pass through the first and second gain stages and be amplified by the first and second gain stages. The light amplified by the first gain stage may pass through the liquid crystal device and may be filtered by the liquid crystal device.

公开(公告)号：US10686546B2

公开(公告)日：2020-06-16

申请号：US16449618

申请日：2019-06-24

申请人： Cisco Technology, Inc.

发明人： Alberto Arnaldo Tanzi ,  Stefano Piciaccia ,  Maurizio Gazzola ,  Lorenzo Ghioni

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

摘要： 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

申请人： Cisco Technology, Inc.

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

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

摘要： 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.