公开(公告)号：US11784714B2

公开(公告)日：2023-10-10

申请号：US17768489

申请日：2019-10-16

申请人： Telefonaktiebolaget LM Ericsson (publ)

发明人： Giulio Bottari ,  Fabio Cavaliere ,  Paola Iovanna

IPC分类号： H04B10/2513 ,  H04J14/02

CPC分类号： H04B10/25133 ,  H04J14/0271

摘要： A method (200) of controlling compensation of chromatic dispersion in an optical transport network. The method comprises determining (202) whether a residual dispersion, RD, of a first path (3) within the network is within a defined RD range and if the RD of the first path is outside the defined RD range the method comprises identifying (204) a first tuneable dispersion compensation module, TDCM, crossed by the first path (3), configured to apply a respective value of dispersion compensation. The method also comprises determining (206) a different value of dispersion compensation to be applied by the first TDCM to bring the RD of the first path within the defined RD range; if (208) the first TDCM is crossed by at least one other path (1, 2), checking (210) that the respective RD of said at least one other path is within a respective defined RD range for said different value of dispersion compensation; and generating (212) a control signal comprising instructions configured to set the first TDCM to apply said different value of dispersion compensation.

公开(公告)号：US20180213305A1

公开(公告)日：2018-07-26

申请号：US15878258

申请日：2018-01-23

申请人： CABLE TELEVISION LABORATORIES, INC

发明人： Luis Alberto CAMPOS ,  Zhensheng JIA ,  Carmela STUART

IPC分类号： H04Q11/00 ,  H04J14/02

CPC分类号： H04Q11/0005 ,  H04J14/0242 ,  H04J14/0257 ,  H04J14/0271 ,  H04Q2011/0016 ,  H04Q2011/0041 ,  H04Q2011/0086

摘要： An optical access network includes an optical hub having at least one processor. The network further includes a plurality of optical distribution centers connected to the optical hub by a plurality of optical fiber segments, respectively, and a plurality of geographic fiber node serving areas. Each fiber node serving area of the plurality of fiber node serving areas includes at least one optical distribution center of the plurality of optical distribution centers. The network further includes a plurality of end points. Each end point of the plurality of end points is in operable communication with at least one optical distribution center. The network further includes a point-to-point network provisioning system configured to (i) evaluate each potential communication path over the plurality of optical fiber segments between a first end point and a second end point, and (ii) select an optimum fiber path based on predetermined path selection criteria.

公开(公告)号：US20180063608A1

公开(公告)日：2018-03-01

申请号：US15297327

申请日：2016-10-19

申请人： Ciena Corporation

发明人： Anurag PRAKASH ,  Rajagopalan KANNAN ,  Gaurav BAFNA

IPC分类号： H04Q11/00 ,  H04L12/733 ,  H04L12/721 ,  H04L12/707

CPC分类号： H04Q11/0066 ,  H04J14/0257 ,  H04J14/0271 ,  H04L45/122 ,  H04L45/124 ,  H04L45/24 ,  H04Q2011/0073

摘要： Systems and methods for computing disjoint paths in a network considering continuity constraints include, responsive to a request for disjoint paths in the network which are subject to the continuity constraints, initializing a plurality of variables associated with a graph defining the network where edges constitute nodes and vertices constitute links; determining a first path through the graph; determining an auxiliary directed graph based on the first path; and determining a second path through the auxiliary directed graph, wherein the second path is determined by considering entry into cut edges, exit from cut edges, and a destination in the auxiliary directed graph and the plurality of variables are adjusted based on the entry, the exit, and the destination to address the continuity constraints. This approach concept applies to not just continuity constraints but to any constraints, which are non-additive in nature; the objective function is still additive for Shortest Path First (SPF).

公开(公告)号：US09820021B2

公开(公告)日：2017-11-14

申请号：US14802240

申请日：2015-07-17

申请人： Ciena Corporation

发明人： Robert Friskney ,  Fiona Davis ,  Nigel Baker ,  Christopher Phillips ,  Song Dong

IPC分类号： H04B10/25 ,  H04Q11/00 ,  H04L12/725 ,  H04L12/721 ,  H04L12/727 ,  H04J14/02

CPC分类号： H04Q11/0066 ,  H04B10/25 ,  H04J14/0257 ,  H04J14/0271 ,  H04J14/0295 ,  H04L45/121 ,  H04L45/124 ,  H04L45/127 ,  H04L45/30 ,  H04L45/308 ,  H04L45/70 ,  H04Q2011/0073 ,  H04Q2011/0086

摘要： A method for determining a path in an optical network, implemented by one or more controllers associated with a control layer, includes receiving a path request specifying start and end points, an associated bandwidth, and a longevity parameter providing an anticipated length during which the path is required; determining a route in the optical network through a routing algorithm executed by the controller, wherein the routing algorithm utilizes the start and end points, the associated bandwidth, and the longevity parameter to determine the path; and provisioning the path through a plurality of switches along the route.

公开(公告)号：US09774931B2

公开(公告)日：2017-09-26

申请号：US14873555

申请日：2015-10-02

申请人： Futurewei Technologies, Inc. ,  the Arizona Board of Regents on Behalf of the University of Arizona

发明人： Jiafeng Zhu ,  Jun He ,  Likun Lin ,  Weiyang Mo ,  Saied Agahi ,  John Wissinger

IPC分类号： H04B17/00 ,  H04Q11/00 ,  H04J14/02 ,  H04B10/079

CPC分类号： H04Q11/0066 ,  H04B10/0793 ,  H04J14/021 ,  H04J14/0212 ,  H04J14/0257 ,  H04J14/0267 ,  H04J14/0271 ,  H04L45/62 ,  H04Q2011/0016 ,  H04Q2011/0073 ,  H04Q2011/0083 ,  H04Q2011/0086

摘要： An embodiment method for managing connections on a communications network having an optical network portion includes receiving a request for a first connection at a controller in signal communication with one or more reconfigurable optical add-drop multiplexers (ROADMs) controlling an optical network portion of a communications network, wherein the controller is connected to the communications network. The controller determines a route on the communications network for the first connection according to conditions of the communications network, with the route comprising one or more first links of the optical network. The controller determines one or more first ROADMs controlling the one or more first links and sends commands from the controller to the one or more first ROADMs to allocate bandwidth on the one or more first links.

公开(公告)号：US09749042B2

公开(公告)日：2017-08-29

申请号：US14337919

申请日：2014-07-22

申请人： Cisco Technology, Inc.

发明人： Rosanna Pastorelli ,  Stefano Piciaccia ,  Alberto Tanzi ,  Eliana Silvia Vercelli

IPC分类号： H04B10/08 ,  H04B17/00 ,  H04B10/079 ,  H04Q11/00 ,  H04J14/02

CPC分类号： H04B10/0795 ,  H04B10/0793 ,  H04J14/0227 ,  H04J14/0257 ,  H04J14/0258 ,  H04J14/0267 ,  H04J14/0269 ,  H04J14/0271 ,  H04Q11/0062 ,  H04Q2011/0073 ,  H04Q2011/0086

摘要： In an optical communication network that includes a plurality of interconnected network nodes, a method includes storing in each network node, and for each communication channel that traverses the node, one or more impairment margins of respective impairments that affect the communication channel. A potential communication channel that traverses a subset of the nodes in the network is identified. A quality of the potential communication channel is evaluated by processing the impairment margins stored in the nodes in the subset.

公开(公告)号：US09654247B2

公开(公告)日：2017-05-16

申请号：US14613743

申请日：2015-02-04

申请人： NEC Laboratories America, Inc.

发明人： Ankitkumar Patel ,  Philip Ji

IPC分类号： H04J14/00 ,  H04J14/02 ,  H04L12/721 ,  H04B10/00

CPC分类号： H04J14/0256 ,  H04B10/00 ,  H04J14/0212 ,  H04J14/0224 ,  H04J14/0257 ,  H04J14/0258 ,  H04J14/0271 ,  H04L45/12 ,  H04L45/62

摘要： There is provided a distance-adaptive and fragmentation-aware all-optical traffic grooming (DFG) method, which addresses the all-optical traffic grooming problem while considering the transmission reach constraints. The DFG procedure provisions traffic demands in optical channels such that the spectrum requires for guard bands is minimized. The DFG procedure provisions optical channels such that network fragmentation is minimized while ensuring the transmission reach constrains over flexible-grid WDM networks.

公开(公告)号：US09559770B2

公开(公告)日：2017-01-31

申请号：US14344973

申请日：2011-10-12

申请人： Giulio Bottari ,  Diego Caviglia ,  Daniele Ceccarelli

发明人： Giulio Bottari ,  Diego Caviglia ,  Daniele Ceccarelli

IPC分类号： H04B10/032 ,  H04B10/2575 ,  H04J14/00 ,  H04Q11/00 ,  H04J14/02

CPC分类号： H04B10/032 ,  H04B10/2575 ,  H04J14/00 ,  H04J14/0209 ,  H04J14/0212 ,  H04J14/0217 ,  H04J14/0257 ,  H04J14/0267 ,  H04J14/0268 ,  H04J14/0271 ,  H04J14/0284 ,  H04Q11/0005 ,  H04Q2011/0043

摘要： Dynamic restoration involves routing and bandwidth assignment of an unplanned restoration path in a wavelength switched optical network (20), having regeneration nodes (60), nodes each having a ROADM (62) having drop paths and add paths. An electrical switch (68) provides configurable regeneration capacity by coupling selected drop paths to selected add paths. Some of the configurable regeneration capacity is kept for unplanned restoration paths. A PCE determines (120) routing and bandwidth assignments for an unplanned restoration path for the traffic flow to avoid a fault, and sends (130) configuration messages to the nodes to set up the unplanned restoration path dynamically and to configure the electrical switch to provide regeneration on the path. Keeping some reconfigurable regeneration capacity enables much longer unplanned paths to be found to avoid faults, and enables wavelength conversion if needed. Thus the reliability of finding at least one path avoiding the fault can be increased.

摘要翻译： 动态恢复涉及在具有再生节点（60）的波长交换光网络（20）中的非计划恢复路径的路由和带宽分配，每个节点具有具有丢弃路径和添加路径的ROADM（62）。 电开关（68）通过将所选择的放置路径耦合到所选择的附加路径来提供可配置的再生能力。 一些可配置的再生能力被保留用于非计划的恢复路径。 PCE确定（120）用于业务流的非计划恢复路径的路由和带宽分配以避免故障，并且向节点发送（130）配置消息以动态地建立非计划恢复路径并且配置电开关以提供 在路上再生。 保持一些可重新配置的再生能力可以实现更长的非计划路径，以避免故障，并在需要时实现波长转换。 因此，可以增加找到至少一个避免故障的路径的可靠性。

公开(公告)号：US09509434B2

公开(公告)日：2016-11-29

申请号：US14536871

申请日：2014-11-10

申请人： Gerard L. Swinkels ,  David W. Boertjes ,  David Miedema ,  Kim B. Roberts

发明人： Gerard L. Swinkels ,  David W. Boertjes ,  David Miedema ,  Kim B. Roberts

IPC分类号： H04J14/02 ,  H04B10/079 ,  H04B10/572 ,  H04B10/58

CPC分类号： H04J14/0227 ,  H04B10/0795 ,  H04B10/572 ,  H04B10/58 ,  H04J14/0241 ,  H04J14/0257 ,  H04J14/0271 ,  H04L1/0023

摘要： Systems and methods of optimizing capacity of an optical network, through intentionally reducing margin on one or more wavelengths, include identifying a first wavelength capable of using excess capacity; determining the one or more wavelengths that have extra margin; adjusting at least one of the one or more wavelengths to reduce associated margin to a nominal margin so as to increase supportable capacity of the first wavelength; and increasing capacity of the first wavelength based on the supportable capacity.

摘要翻译： 通过有意地减少一个或多个波长的裕度来优化光网络容量的系统和方法包括识别能够使用过剩容量的第一波长; 确定具有额外余量的一个或多个波长; 调整所述一个或多个波长中的至少一个以将相关余量减小到额定余量，从而增加所述第一波长的可支持容量; 并且基于可支持容量增加第一波长的容量。

公开(公告)号：US09485553B2

公开(公告)日：2016-11-01

申请号：US14343545

申请日：2011-11-03

申请人： Roberto Magri ,  Piero Castoldi ,  Filippo Cugini ,  Francesco Paolucci ,  Nicola Sambo

发明人： Roberto Magri ,  Piero Castoldi ,  Filippo Cugini ,  Francesco Paolucci ,  Nicola Sambo

IPC分类号： H04B10/00 ,  H04Q11/00 ,  H04L12/721 ,  H04J14/02

CPC分类号： H04Q11/0066 ,  H04J14/0257 ,  H04J14/0258 ,  H04J14/026 ,  H04J14/0269 ,  H04J14/0271 ,  H04L45/42 ,  H04L45/62 ,  H04Q2011/0073 ,  H04Q2011/0083

摘要： A path computation client (PCC) can request a path computation element (PCE) to compute a path across a wavelength switched optical network. PCC sends a request which identifies end nodes. The end nodes can support a plurality of possible values of a transmission parameter, such as modulation format or Forward Error Correction (FEC) type. The PCE computes a path between the end nodes and sends a reply to the PCC. The reply identifies the path between the end nodes and identifies a selected value of the transmission parameter for the computed path. The reply can comprise a spectrum assignment for the path. The reply can be a PCE Communication Protocol (PCEP) Reply message.

摘要翻译： 路径计算客户机（PCC）可以请求路径计算元件（PCE）来计算穿过波长交换光网络的路径。 PCC发送一个标识终端节点的请求。 端节点可以支持传输参数的多个可能值，例如调制格式或前向纠错（FEC）类型。 PCE计算端节点之间的路径，并向PCC发送回复。 回复标识了结束节点之间的路径，并标识了所计算的路径的传输参数的选定值。 答复可以包括路径的频谱分配。 该回复可以是PCE通信协议（PCEP）回复消息。