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    OPTICAL NETWORK CONTROLLER AND METHOD OF SETTING OPTICAL PATH
    1.
    发明申请
    OPTICAL NETWORK CONTROLLER AND METHOD OF SETTING OPTICAL PATH 审中-公开

    公开(公告)号：US20190037288A1

    公开(公告)日：2019-01-31

    申请号：US16077136

    申请日：2017-02-08

    Applicant: NEC CORPORATION

    Inventor： Shinsuke FUJISAWA ,  Akio TAJIMA ,  Hitoshi TAKESHITA ,  Tomoyuki HINO

    IPC: H04Q11/00

    Abstract: In the elastic optical network, there has been the problem that processing steps increase that are required to re-optimize client signals to be concentrated; therefore, an optical network controller according to an exemplary aspect of the present invention includes reallocation detection means for monitoring an operation status of at least one of an optical communication channel and an optical node device that constitute an optical network, and determining, based on the operation status, whether or not to reallocate a client signal accommodated in an optical path set in the optical network; design-candidate exclusion means for designating, as a design exclusion object, at least one of the optical communication channel and the optical node device that are associated with an optical path targeted for reallocation that accommodates the client signal that the reallocation detection means has determined to reallocate; optical path design means for determining an alternative route for the optical path targeted for reallocation from among routes with the exception of the design exclusion object; traffic reference means for determining the client signal to be reaccommodated in an optical path on the alternative route, referring to demand traffic accommodated in the optical path targeted for reallocation; and line concentration design means for constituting line-concentration traffic in which traffic having been allocated to the alternative route and the demand traffic are concentrated, wherein the traffic reference means determines a reallocation optical path in which an optical path candidate with number of occupied wavelength slots increasing is excluded from optical path candidates on the alternative route, and the optical path design means determines wavelength allocation of the reallocation optical path so as to accommodate the line-concentration traffic.

    OPTICAL NETWORK CONTROL DEVICE AND OPTICAL PATH SETTING METHOD
    2.
    发明申请
    OPTICAL NETWORK CONTROL DEVICE AND OPTICAL PATH SETTING METHOD 审中-公开

    公开(公告)号：US20190238451A1

    公开(公告)日：2019-08-01

    申请号：US16338549

    申请日：2017-10-04

    Applicant: NEC Corporation

    Inventor： Shinsuke FUJISAWA ,  Hitoshi TAKESHITA ,  Akio TAJIMA

    IPC: H04L12/703 ,  H04L12/721 ,  H04L12/725

    CPC classification number: H04L45/28 ,  H04L45/123 ,  H04L45/302

    Abstract: An optical network control device includes: a path setting unit that sets, based on topology information including a connection relationship among a plurality of nodes and a first route selection index value of routes each connecting the plurality of nodes, a first path for a route having the first route selection index value being minimum from among route candidates linking a start point node and an end point node of a requested traffic; a topology information modification unit that calculates a second route selection index value acquired by increasing the first route selection index value of the route that accommodates the first path; and a path selection unit that selects a second path for a route having the second route selection index value being minimum from among the route candidates.

    OPTICAL NETWORK CONTROLLER AND OPTICAL NETWORK CONTROL METHOD
    4.
    发明申请
    OPTICAL NETWORK CONTROLLER AND OPTICAL NETWORK CONTROL METHOD 审中-公开
    光网络控制器和光网络控制方法

    公开(公告)号：US20160212511A1

    公开(公告)日：2016-07-21

    申请号：US14914159

    申请日：2014-09-01

    Applicant: NEC Corporation

    Inventor： Hitoshi TAKESHITA ,  Tomoyuki HINO ,  Akio TAJIMA

    IPC: H04Q11/00 ,  H04J14/02

    CPC classification number: H04Q11/0005 ,  H04J14/02 ,  H04J14/0242 ,  H04J14/0283 ,  H04J14/0287 ,  H04Q2011/0086

    Abstract: In an optical network by a highly dense wavelength division multiplexing system using a flexible frequency grid, it is difficult to improve the optical bandwidth utilization efficiency in the optical network as a whole with improving the fault tolerance, therefore, an optical network controller according to an exemplary aspect of the present invention includes an optical path setting means for selecting a plurality of optical node pairs composed of two optical nodes from among a plurality of optical nodes composing the optical network by a highly dense wavelength division multiplexing system using a flexible frequency grid, and setting, between each of the plurality of optical node pairs, a plurality of optical paths including a first optical path and a second optical path each of which links the optical node pair through various routes; and an optical band setting means for setting respective optical bands based on optical path length and transmission capacity so that an amount of optical bandwidths of the first optical path may become larger than or equal to an amount of optical bandwidths of the second optical path.

    Abstract translation: 在通过使用柔性频率网格的高度密集的波分复用系统的光网络中，难以提高光网络中的光纤带宽利用效率，同时提高了容错性，因此，根据 本发明的示例性方面包括一种光路设置装置，用于通过使用柔性频率网格的高密度波分复用系统从组成光网络的多个光节点中选择由两个光节点组成的多个光节点对， 并且在所述多个光学节点对中的每一个之间设置包括第一光路和第二光路的多个光路，每个光路通过各种路线链接所述光节点对; 以及光带设定装置，用于基于光路长度和传输容量设置各个光带，使得第一光路的光学带宽的量可以变得大于或等于第二光路的光学带宽量。

    MULTI-LAYER NETWORK SYSTEM AND PATH SETTING METHOD IN MULTI-LAYER NETWORK
    5.
    发明申请
    MULTI-LAYER NETWORK SYSTEM AND PATH SETTING METHOD IN MULTI-LAYER NETWORK 有权

    公开(公告)号：US20240405875A1

    公开(公告)日：2024-12-05

    申请号：US18804520

    申请日：2024-08-14

    Applicant: NEC Corporation

    Inventor： Hitoshi TAKESHITA ,  Shinsuke FUJISAWA ,  Tomoyuki HINO ,  Akio TAJIMA

    IPC: H04B10/275 ,  H04B10/03 ,  H04B10/079 ,  H04J14/02 ,  H04L12/437

    Abstract: In a multi-layer network, a control load in the upper layer network increases, and the usage efficiency and the reliability of the entire network decrease; therefore, a multi-layer network system according to an exemplary aspect of the present invention includes a first network manager configured to set a logical path in a first network layer; and a second network manager configured to set a physical path corresponding to the logical path, in a second network layer, wherein the second network manager includes a network information storage configured to store physical network information including physical route information and transmission characteristic information on the second network layer, and the first network manager sets the logical path based on the physical network information.

    MULTI-LAYER NETWORK SYSTEM AND PATH SETTING METHOD IN MULTI-LAYER NETWORK
    6.
    发明申请
    MULTI-LAYER NETWORK SYSTEM AND PATH SETTING METHOD IN MULTI-LAYER NETWORK 有权

    公开(公告)号：US20210058157A1

    公开(公告)日：2021-02-25

    申请号：US17091557

    申请日：2020-11-06

    Applicant: NEC Corporation

    Inventor： Hitoshi TAKESHITA ,  Shinsuke FUJISAWA ,  Tomoyuki HINO ,  Akio TAJIMA

    IPC: H04B10/275 ,  H04J14/02 ,  H04L12/437 ,  H04B10/03 ,  H04B10/079

    Abstract: In a multi-layer network, a control load in the upper layer network increases, and the usage efficiency and the reliability of the entire network decrease; therefore, a multi-layer network system according to an exemplary aspect of the present invention includes a first network manager configured to set a logical path in a first network layer; and a second network manager configured to set a physical path corresponding to the logical path, in a second network layer, wherein the second network manager includes a network information storage configured to store physical network information including physical route information and transmission characteristic information on the second network layer, and the first network manager sets the logical path based on the physical network information.

    OPTICAL COMMUNICATION SYSTEM, OPTICAL NODE DEVICE, AND OPTICAL PATH SETTING METHOD
    8.
    发明申请
    OPTICAL COMMUNICATION SYSTEM, OPTICAL NODE DEVICE, AND OPTICAL PATH SETTING METHOD 有权

    公开(公告)号：US20170302370A1

    公开(公告)日：2017-10-19

    申请号：US15513450

    申请日：2015-09-15

    Applicant: NEC Corporation

    Inventor： Shinsuke FUJISAWA ,  Hitoshi TAKESHITA ,  Tomoyuki HINO ,  Akio TAJIMA

    IPC: H04B10/03 ,  H04Q11/00 ,  H04B10/40

    CPC classification number: H04B10/03 ,  H04B10/032 ,  H04B10/40 ,  H04Q11/0062 ,  H04Q2011/0073 ,  H04Q2011/0081

    Abstract: It is difficult in an optical network to achieve fault recovery in case of multiple failures without decreasing the usage efficiency of the optical network; therefore, an optical communication system according to an exemplary aspect of the present invention includes an optical network management device including an optical path setting means for setting, to a physical route differing from each other, a backup path corresponding to each of a plurality of active paths on an identical physical route, and a failure-case optical path setting means for setting a failure-case backup path with a compressed band of the backup path, to a physical route without a failure in a case where failures arising on more than one physical route among the physical routes; and an optical node device including an optical transceiver means for transmitting and receiving optical signals using failure-case backup path information resulting from setting by the failure-case optical path setting means.

    INFORMATION COMMUNICATION SYSTEM, INFORMATION COMMUNICATION METHOD AND DEVICE
    9.
    发明申请
    INFORMATION COMMUNICATION SYSTEM, INFORMATION COMMUNICATION METHOD AND DEVICE 审中-公开

    公开(公告)号：US20170237666A1

    公开(公告)日：2017-08-17

    申请号：US15502245

    申请日：2015-08-20

    Applicant: NEC Corporation

    Inventor： Takao OCHI ,  Ken-ichiro YOSHINO ,  Akio TAJIMA

    IPC: H04L12/803 ,  H04L9/12 ,  H04L9/08

    Abstract: In order to achieve the dispersion of a processing load between communication devices that perform information transmission, an information communication system according to an exemplary aspect of the present invention includes a first transmission system configured to transmit information in a direction from a first communication device to a second communication device; and a second transmission system configured to transmit information in a direction opposite to the direction of the first transmission system, wherein part of transmission information is received as received information in each of the first transmission system and the second transmission system.

    OPTICAL NODE DEVICE, OPTICAL NETWORK CONTROLLER, AND OPTICAL NETWORK CONTROL METHOD
    10.
    发明申请
    OPTICAL NODE DEVICE, OPTICAL NETWORK CONTROLLER, AND OPTICAL NETWORK CONTROL METHOD 审中-公开
    光学节点设备，光网络控制器和光网络控制方法

    公开(公告)号：US20170054506A1

    公开(公告)日：2017-02-23

    申请号：US15305753

    申请日：2015-04-15

    Applicant: NEC Corporation

    Inventor： Hitoshi TAKESHITA ,  Shinsuke FUJISAWA ,  Tomoyuki HINO ,  Akio TAJIMA

    IPC: H04B10/27 ,  H04J14/02

    CPC classification number: H04B10/27 ,  H04J14/02 ,  H04J14/0224 ,  H04J14/0241 ,  H04L12/28 ,  H04L12/6418

    Abstract: In an optical network based on a dense wavelength division multiplexing system using a flexible frequency grid, it is difficult to improve the usage efficiency of an optical frequency band owing to the occurrence of fragmentation of the optical frequency band; therefore, an optical network controller according to an exemplary aspect of the present invention includes an optical frequency region setting means for setting a plurality of optical frequency regions in an optical frequency band used in an optical network based on a dense wavelength division multiplexing system using a flexible frequency grid; an optical path setting means for setting optical paths having a common attribute in at least one of the plurality of optical frequency regions; and an optical frequency region control means for changing an optical frequency width of the optical frequency region, and instructing the optical frequency region setting means to reconfigure, as the plurality of optical frequency regions, a plurality of optical frequency reconfigured regions each of which having the optical frequency width after having been changed.

    Abstract translation: 在基于使用柔性频率网格的密集波分复用系统的光网络中，由于光频带的碎裂的发生，难以提高光频带的使用效率; 因此，根据本发明的示例性方面的光网络控制器包括：光频域设定装置，用于基于使用密度波分复用系统的密集波分复用系统，在光网络中使用的光频带中设置多个光频区域 灵活的频率网格; 光路设定装置，用于设置在所述多个光频区域中的至少一个中具有公共属性的光路; 以及光频区域控制装置，用于改变光频区域的光频宽度，并且指示光频区域设置装置将多个光频重新配置区域重新配置为多个光频重新配置区域， 改变后的光频宽度。

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