公开(公告)号：US11476938B2

公开(公告)日：2022-10-18

申请号：US16081594

申请日：2017-03-09

Applicant: Xieon Networks S.a.r.l.

Inventor： Tiago Mestre ,  Carlo Marques ,  Anton Schex ,  Lutz Rapp

IPC: H04B10/291 ,  H01S3/30 ,  H01S3/067 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/131

Abstract: A Raman pumping device (10) for amplifying a data optical signal in a fiber optic transmission system, comprising first and second ports (12a, 12b) through which the data optical signal may respectively enter and exit the Raman pumping device (10), a Raman pump source (14) for generating a Raman pump signal, and at least one combiner (16) for combining the Raman pump signal with the data optical signal. The Raman pumping device (10) allows for selectively combining the Raman pump signal generated by the same Raman pump source (14), or at least parts of the same Raman pump source (14) codirectionally or counterdirectionally with the data optical signal.

公开(公告)号：US11139893B2

公开(公告)日：2021-10-05

申请号：US16152865

申请日：2018-10-05

Applicant: Xieon Networks S.a.r.l.

Inventor： Antonio Eira ,  João Manuel Ferreira Pedro

IPC: H04J14/00 ,  H04B10/27 ,  H04L1/00 ,  H04B10/66 ,  H04J14/02

Abstract: A set of media channel (MCh) widths is determined for an optical network. Based on a topology of the network, a first set of original MCh widths are computed for tentative use in the optical network, the first set of original MCh widths defining a target spectral efficiency. A reduced set of new MCh widths are generated from the first set of MCh widths by respectively mapping each of the original MCh widths of the first set of original MCh widths to a corresponding, or respective, new MCh width. An optimization algorithm is used in an example embodiment to facilitate the mapping.

公开(公告)号：US10749727B2

公开(公告)日：2020-08-18

申请号：US16083717

申请日：2017-03-22

Applicant: Xieon Networks S.a.r.l.

Inventor： Danish Rafique ,  Stefano Calabro

IPC: H04L27/34 ,  H04B10/032 ,  H04J14/02 ,  H04L1/00 ,  H04L27/36 ,  H04B10/548 ,  H04B10/54 ,  H04B10/516

Abstract: Enclosed herewith is a method for protecting a link in an optical network configured for transmitting digital data employing a predetermined modulation format which comprises a number of symbols in a constellation diagram. A binary address is associated with each symbol. The modulation format allows for a constellation distortion, according to which the relative positions of constellation points in the constellation diagram are varied in a predetermined way by a predetermined degree. The method the steps of: A) partitioning the traffic in two or more priority classes, B) mapping higher priority traffic to predefined bit positions within the binary symbol addresses, C) evaluating the quality of a predetermined protection link, D) determining a degree of distortion such that a desired transmission quality for the transmission of the traffic of the highest priority class or classes via said predetermined protection link and a desired transmission quality for the full traffic via said given link are simultaneously ensured, and E) employing said distorted constellation diagram for transmission of digital data over said given link.

公开(公告)号：US10700777B2

公开(公告)日：2020-06-30

申请号：US15540906

申请日：2015-12-18

Applicant: Xieon Networks S.a.r.l.

Inventor： João Pedro ,  Rui Morais

IPC: H04B10/079 ,  H04Q11/00 ,  H04L12/24 ,  H04J14/02 ,  H04B10/27 ,  H04L12/721 ,  H04L12/26

Abstract: A method of assigning performance indicators to objects of a network employing a computation to assign performance indicators to said objects of said network such that a sum of said performance indicators of objects along a given path in said network in relation to a first threshold value indicates whether said path fulfils a predetermined criterion, and/or indicates whether said path does not fulfil said predetermined criterion.A method of evaluating a performance of a path in a network based on the performance indicators involves the steps of calculating a sum of performance indicators for said objects along said path and evaluating a performance of said path by comparing said sum against a first threshold value.

公开(公告)号：US10560189B2

公开(公告)日：2020-02-11

申请号：US15606492

申请日：2017-05-26

Applicant: Xieon Networks S.a.r.l.

Inventor： Lutz Rapp

IPC: H04B10/27 ,  H04B10/2581 ,  H04J14/00 ,  H04J14/04

Abstract: An optical network is suggested, comprising a first set of optical fibers, a multimode multiplexer, a multimode amplifier, a multimode demultiplexer, and a second set of optical fibers, wherein the first set of optical fibers is connected via the multimode multiplexer to the multimode amplifier and wherein the multimode amplifier is connected via the multimode demultiplexer to the second set of optical fibers. Accordingly, an optical network element is provided.

公开(公告)号：US10439730B2

公开(公告)日：2019-10-08

申请号：US14890373

申请日：2014-05-12

Applicant: Xieon Networks S.a.r.l.

Inventor： Antonio Napoli ,  Chien-Yu Lin ,  Bernhard Spinnler ,  Vincentius Antonius Johannes Mar Sleiffer

IPC: H04B10/60 ,  H04B10/58 ,  H04B10/2543 ,  H04B10/61

Abstract: A method and device is provided for reducing optical transmission impairments, particularly nonlinear effects, of at least one link Said method comprising the following steps: extracting a phase information (Δθ) from an optical signal (120) received via that at least one link, determining a nonlinear coefficient (γ), associated with the at least one link, based on the phase information (Δθ), applying a control mechanism (202) using the nonlinear coefficient (γ). Furthermore, a communication system is suggested comprising said device.

公开(公告)号：US20190207701A1

公开(公告)日：2019-07-04

申请号：US16096201

申请日：2017-09-21

Applicant: Xieon Networks S.a.r.l.

Inventor： João Manuel FERREIRA PEDRO

IPC: H04J14/02

CPC classification number: H04J14/0257 ,  H04J14/0271

Abstract: Disclosed herein is a method of assigning a wavelength to a given light path in a wavelength switched optical network, as well as a corresponding routing engine and computer program. The method comprises the following step. For each of a plurality of possible wavelengths for said light path, retrieving information from an optical performance database (30) allowing to assess whether the given wavelength meets a predetermined feasibility criterion with regard to said given light path; if the given wavelength is found to meet the predetermined feasibility criterion, determining a set of extended feasible light paths, each of which fully including the given light path, but containing one or more additional nodes; and calculating a first score based on said determined set of extended feasible light paths, wherein said method further comprises a step of choosing, based on said first score, a wavelength that has a first score indicating a low suitability for providing useful extended feasible light paths for future use.

公开(公告)号：US10305785B2

公开(公告)日：2019-05-28

申请号：US15309133

申请日：2015-03-31

Applicant: Xieon Networks S.a.r.l.

Inventor： Kaiyuan Huang

IPC: H04L12/26 ,  H04L12/28 ,  G06F15/173 ,  H04L12/707 ,  H04L12/727 ,  H04L12/725 ,  H04L12/721

Abstract: At least one data-stream is re-routed and a network element is provided for re-routing at least one data-stream. A first part and a second part of a data-stream received at a first node and are transmitted to a second node via two different network paths, respectively. The first is transmitted from the first node to the second node via a first network path. A second network path is determined, and the difference between latencies of the first and second network paths is also determined. If the latency of the first network path is larger than the latency of the second network path, the at least one data-stream at the first node is re-routed from the first network path to the second network path provided that the time gap between data packets received by the first node exceeds said difference between latencies.

公开(公告)号：US10256946B2

公开(公告)日：2019-04-09

申请号：US15318603

申请日：2015-06-22

Applicant: Xieon Networks S.a.r.l.

Inventor： Stefano Calabro

IPC: H04L1/00 ,  H03M13/27 ,  H03M13/29 ,  H03M13/39 ,  H03M13/45 ,  H04B10/61 ,  H04J14/02 ,  H04B10/516 ,  H04B10/548

Abstract: Disclosed is a method for decoding an optical data signal. Said optical data signal is phase and amplitude modulated according to a constellation diagram with at least eight constellation points representing non-binary symbols. Said decoding method comprises the following steps: —carrying out a carrier phase recovery of a received signal ignoring the possible occurrence of phase slips, —decoding said signal after phase recovery, wherein in said decoding, possible cycle slips occurring during phase recovery are modelled as virtual input to an equivalent encoder assumed by the decoding scheme. Further disclosed are a related encoding method as well as a receiver and a transmitter.

公开(公告)号：US10177522B2

公开(公告)日：2019-01-08

申请号：US15512728

申请日：2015-08-21

Applicant: Xieon Networks S.a.r.l.

Inventor： Lutz Rapp

IPC: H01S3/00 ,  H01S3/067 ,  H01S3/094 ,  H01S3/10 ,  H01S3/13 ,  H04B10/296 ,  H01S3/0941 ,  H01S3/16

Abstract: Disclosed is a method of Controlling a gain of an optical amplifier comprising a gain medium and at least one pumping device. The method comprises the following steps: determining or predicting a change of input signal power to the amplifier, changing the pump power from an initial pump power level to a new pump power level at a first time instant, the initial pump power level being the pump power level applied to the amplifier prior to the change in input signal power, setting the pump power to a second pump power level at a second time instant, wherein the pump power level is varied in an oscillatory manner for at least one period of time starting at a third time instant and ending at a fourth time instant, wherein said third time instant is identical with or later than said first time instant and said fourth time instant is identical with or earlier than said second time instant.