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    Adaptive constellation diagram reducing the impact of phase distortions
    1.
    发明授权
    Adaptive constellation diagram reducing the impact of phase distortions 有权

    公开(公告)号：US11581948B2

    公开(公告)日：2023-02-14

    申请号：US16074287

    申请日：2017-02-28

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

    Inventor： Lutz Rapp

    IPC: H04B10/54 ,  H04B10/548 ,  H04B10/61 ,  H04B10/2537

    Abstract: Disclosed herein is a method of encoding and/or decoding data for optical data transmission along a transmission link, as well as corresponding transmitters and receivers. The data is encoded based on an adaptive constellation diagram in a 2-D plane, said constellation diagram including a first and a second pair of symbols, wherein the symbols of the first pair of symbols are located at opposite sides of the origin of the 2-D plane at a first distance di from each other, and wherein the symbols of the second pair of symbols are located at opposite sides of the origin of the 2-D plane at a second distance d2 from each other. The method comprises a step of adapting the constellation diagram by varying the ratio of the first and second distances d1, d2 such as to minimize or nearly minimize a bit error rate in the transmitted data.

    Method and tool for service provisioning with improved spectral efficiency in grid-less optical networks
    2.
    发明授权
    Method and tool for service provisioning with improved spectral efficiency in grid-less optical networks 有权

    公开(公告)号：US10972208B2

    公开(公告)日：2021-04-06

    申请号：US16482235

    申请日：2017-12-05

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

    Inventor： Michael Frantz ,  Juraj Slovak ,  Heiko Riemer

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

    Abstract: Disclosed is a service provisioning tool and method for determining favorable implementations of a service in a grid-less optical network, wherein said service provisioning tool is configured to assign total cost values to a given implementations, select the implementation or a group of implementations having the lowest cost, wherein said total cost values are based on —cost values regarding selectable data rates on individual links, —cost values regarding necessity to install additional equipment, —cost values regarding selectable signal frequency bands. One or more of said cost values are dynamically changing as a function of one or more of the degree of utilization, the lifetime of the service, the time available for establishing the service, a modulation format and a signal power. The cost value per band width varies, depending on one or more of the size of the selected frequency band, and to what extent the selected frequency band fills gaps between occupied spectral ranges or creates gaps remaining between occupied spectral ranges.

    Network element of a software-defined network
    3.
    发明授权
    Network element of a software-defined network 有权

    公开(公告)号：US10404531B2

    公开(公告)日：2019-09-03

    申请号：US14643421

    申请日：2015-03-10

    Applicant: XIEON NETWORKS S.A.R.L.

    Inventor： Ville Hallivuori ,  Juhamatti Kuusisaari

    IPC: H04L12/24 ,  H04L29/08 ,  H04L12/707 ,  H04L12/721 ,  H04L12/723 ,  H04L12/741

    Abstract: A network element of a software-defined network comprises a data transfer interface (210) for receiving and transmitting data and a processing system (215) for constructing a software-defined data path and a fixed-functionality data path such as for example an IP/MPLS or L2 switching path. The software-defined data path comprises look-up tables for selecting software-defined actions and the fixed-functionality data path defines fixed-functionality actions. The processing system is adapted to convert metadata associated with data managed by the software-defined data path to a data format suitable for the fixed-functionality data path when one or more of the fixed-functionality actions are needed in conjunction with forwarding the data. One of the fixed-functionality actions is selected at least partly on the basis of which one of the look-up tables was most recently accessed, and the determined fixed-functionality action is carried out so as to initiate the one or more needed fixed-functionality actions.

    DECODER FOR A FAMILY OF RATE COMPATIBLE LOW-DENSITY PARITY CHECK (LDPC) CODES
    4.
    发明申请
    DECODER FOR A FAMILY OF RATE COMPATIBLE LOW-DENSITY PARITY CHECK (LDPC) CODES 审中-公开

    公开(公告)号：US20190140661A1

    公开(公告)日：2019-05-09

    申请号：US16092813

    申请日：2017-04-13

    Applicant: XIEON NETWORKS S.A.R.L.

    Inventor： Stefano CALABRÒ

    IPC: H03M13/11

    Abstract: Disclosed herein is a decoder 10 for decoding a family of L rate compatible parity check codes, said family of parity check codes comprising a first code that can be represented by a bipartite graph having variable nodes, check nodes, and edges, and L−1 codes of increasingly lower code rate, among which the i-th code can be represented by a bipartite graph corresponding to the bipartite graph representing the (i−1)-th code, to which an equal number of n1 variable nodes and check nodes are added, wherein the added check nodes are connected via edges with selected ones of the variable nodes included in said i-th code, while the added variable nodes are connected via edges with selected added check nodes only. The decoder comprising L check node processing units 14, among which the i-th check node processing unit processes only the check nodes added in the i-th code over the (i−1)-th code, wherein said L check node processing units 14 are configured to operate in parallel.

    Method and arrangement for channel set up in an optical WDM-network
    10.
    发明授权
    Method and arrangement for channel set up in an optical WDM-network 有权

    公开(公告)号：US09621261B2

    公开(公告)日：2017-04-11

    申请号：US14410907

    申请日：2012-07-26

    Applicant: Benoit Clouet ,  Anton Schex

    Inventor： Benoit Clouet ,  Anton Schex

    IPC: H04J14/02 ,  H04B10/077

    CPC classification number: H04B10/0775 ,  H04J14/02 ,  H04J14/0221

    Abstract: The invention refers a method and an arrangement for channel set up in an optical network. An optical signal path is configured for a certain optical channel signal (OC1) of a WDM-signal. This channel signal (OC1) is on-off-modulated by a modulation test signal (MT1) having a predetermined lower frequency and is generating a channel test signal (OT1). This channel test signal (OT1) is combined with other optical channels (OC2-OCn) to the WDM-signal (WS) and transmitted via said path. At a start node (1) or a downstream node (3, 5) a measurement signal (EMI, EM3) is derived from the complete WDM-signal (WS) without wavelength de-multiplexing. The measurement signal (EMI, EM3) is compared with a correlation signal (MC1) and an obtained power level (PC1) is used to adjust the channel power (PC1, PC2, PC3) to achieve predetermined target power values (PC1-PC4) at different power monitoring points (19, 40, 41, 58). The adjustment step is repeated for all downstream nodes (3, 5) and all further channel signals (OC2-OCn).

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