公开(公告)号：US09800522B2

公开(公告)日：2017-10-24

申请号：US14554115

申请日：2014-11-26

申请人： Mohit Chhillar ,  Anurag Prakash ,  Gerard Leo Swinkels

发明人： Mohit Chhillar ,  Anurag Prakash ,  Gerard Leo Swinkels

IPC分类号： H04L12/939 ,  H04L12/911 ,  H04L12/703 ,  H04L12/937 ,  H04L12/715 ,  H04L12/707

CPC分类号： H04L49/557 ,  H04L45/22 ,  H04L45/28 ,  H04L45/64 ,  H04L47/72 ,  H04L49/253

摘要： A Make-Before-Break (MBB) method, in a node operating in a network with a control plane, decoupling the control plane from a data plane, includes, for a connection operating on a path in the network, determining a reserved connection on a new path, through the control plane, wherein the reserved connection has zero bandwidth; signaling the reserved connection on the new path; creating the reserved connection in the control plane while suspending implementation in the data plane due to the zero bandwidth; and releasing the connection on the path and modifying the reserved connection on the new path to establish the connection on the new path.

公开(公告)号：US20170163489A1

公开(公告)日：2017-06-08

申请号：US14961352

申请日：2015-12-07

申请人： Anurag Prakash ,  Mohit Chhillar ,  Dominic Richens ,  Seemant Bisht

发明人： Anurag Prakash ,  Mohit Chhillar ,  Dominic Richens ,  Seemant Bisht

IPC分类号： H04L12/24 ,  H04B10/27

CPC分类号： H04L41/12 ,  H04B10/27 ,  H04J14/0227

摘要： A method for control plane discovery includes a plurality of network elements transmitting an outbound control plane communication to generate path information of a path through the network elements. The transmitting includes receiving, by an intermediate network element of the network elements, the outbound control plane communication on an optical layer ingress port, appending, by the intermediate network element, an intermediate network element identifier of the intermediate network element to the path information in the outbound control plane communication, and transmitting, by the intermediate network element, the outbound control plane communication via an electrical layer egress port based on the intermediate network element comprising a layer changing drop port. The method further includes the network elements receiving via the path, the path information via a returned control plane communication, storing the path information in the returned control plane communication, and operating a control plane using the path information.

公开(公告)号：US08682160B2

公开(公告)日：2014-03-25

申请号：US13420717

申请日：2012-03-15

申请人： Anurag Prakash ,  Mohit Chhillar ,  Marian Trnkus ,  Waseem Reyaz Khan

发明人： Anurag Prakash ,  Mohit Chhillar ,  Marian Trnkus ,  Waseem Reyaz Khan

IPC分类号： H04J14/00

CPC分类号： H04J14/0257 ,  H04J14/0206 ,  H04J14/0215 ,  H04J14/0217 ,  H04J14/0258 ,  H04J14/0267 ,  H04J14/0269 ,  H04J14/0271 ,  H04J14/0284

摘要： A path computation method includes defining photonic constraints associated with a network, wherein the photonic constraints include wavelength capability constraints at each node in the network, wavelength availability constraints at each node in the network, and nodal connectivity constraints of each node in the network, and performing a constrained path computation in the network using Dijkstra's algorithm on a graph model of the network with the photonic constraints considered therein. An optical network includes a plurality of interconnected nodes each including wavelength capability constraints, wavelength availability constraints, and nodal connectivity constraints, and a path computation element associated with the plurality of interconnected photonic nodes, wherein the path computation element is configured to perform a constrained path computation through the plurality of interconnected nodes using Dijkstra's algorithm on a graph model with the photonic constraints considered therein.

摘要翻译： 路径计算方法包括定义与网络相关联的光子约束，其中光子约束包括网络中每个节点处的波长能力约束，网络中每个节点处的波长可用性约束以及网络中每个节点的节点连接约束，以及 使用Dijkstra算法对其中考虑的光子约束的网络的图形模型执行网络中的约束路径计算。 光网络包括多个互连节点，每个节点包括波长能力约束，波长可用性约束和节点连接性约束，以及与多个相互连接的光子节点相关联的路径计算元件，其中，路径计算元件被配置为执行约束路径 在其中考虑的光子约束的图形模型上使用Dijkstra算法通过多个互连节点进行计算。

公开(公告)号：US09577782B2

公开(公告)日：2017-02-21

申请号：US14340788

申请日：2014-07-25

申请人： Anurag Prakash ,  Mohit Chhillar

发明人： Anurag Prakash ,  Mohit Chhillar

IPC分类号： H04J14/02

CPC分类号： H04B10/0795 ,  H04J3/1652 ,  H04J14/0227 ,  H04J14/0254 ,  H04J14/026 ,  H04J2203/0053 ,  H04L45/42 ,  H04L47/11 ,  H04L47/76 ,  H04L49/30 ,  H04L49/357 ,  H04L2012/5619

摘要： A method includes profiling user-network interface (UNI) ports including Optical channel Data Unit flex (ODUflex) in a network; and adapting, using a max-flow routing criterion, network-network interface (NNI) ports comprising ODUflex based on the profiling. A network includes a plurality of network elements; a plurality of links interconnecting the plurality of network elements, wherein the plurality of links includes Layer 0 Dense Wave Division Multiplexing (DWDM) bandwidth and Layer 1 Optical Transport Network (OTN) bandwidth; and a control plane operating between the plurality of network elements; wherein the Layer 0 DWDM bandwidth and the Layer 1 OTN bandwidth is statistically multiplexed using the control plane and manager based on monitoring bandwidth usage thereon over time.

摘要翻译： 一种方法包括在网络中分析用户网络接口（UNI）端口，包括光信道数据单元灵活（ODUflex）; 并使用最大流量路由标准来适应基于分析的包含ODUflex的网络接口（NNI）端口。 网络包括多个网元; 连接所述多个网络元件的多个链路，其中所述多个链路包括层0密集波分复用（DWDM）带宽和第1层光传输网络（OTN）带宽; 以及在所述多个网络元件之间操作的控制平面; 其中使用所述控制平面和管理器，基于随时间监视其带宽使用来对所述第0层DWDM带宽和所述第1层OTN带宽进行统计复用。

公开(公告)号：US20150365189A1

公开(公告)日：2015-12-17

申请号：US14340788

申请日：2014-07-25

申请人： Anurag PRAKASH ,  Mohit CHHILLAR

发明人： Anurag PRAKASH ,  Mohit CHHILLAR

IPC分类号： H04J14/02 ,  H04B10/079

CPC分类号： H04B10/0795 ,  H04J3/1652 ,  H04J14/0227 ,  H04J14/0254 ,  H04J14/026 ,  H04J2203/0053 ,  H04L45/42 ,  H04L47/11 ,  H04L47/76 ,  H04L49/30 ,  H04L49/357 ,  H04L2012/5619

摘要： A method includes profiling user-network interface (UNI) ports including Optical channel Data Unit flex (ODUflex) in a network; and adapting, using a max-flow routing criterion, network-network interface (NNI) ports comprising ODUflex based on the profiling. A network includes a plurality of network elements; a plurality of links interconnecting the plurality of network elements, wherein the plurality of links includes Layer 0 Dense Wave Division Multiplexing (DWDM) bandwidth and Layer 1 Optical Transport Network (OTN) bandwidth; and a control plane operating between the plurality of network elements; wherein the Layer 0 DWDM bandwidth and the Layer 1 OTN bandwidth is statistically multiplexed using the control plane and manager based on monitoring bandwidth usage thereon over time.

摘要翻译： 一种方法包括在网络中分析用户网络接口（UNI）端口，包括光信道数据单元灵活（ODUflex）; 并使用最大流量路由标准来适应基于分析的包含ODUflex的网络接口（NNI）端口。 网络包括多个网元; 连接所述多个网络元件的多个链路，其中所述多个链路包括层0密集波分复用（DWDM）带宽和第1层光传输网络（OTN）带宽; 以及在所述多个网络元件之间操作的控制平面; 其中使用所述控制平面和管理器，基于随时间监视其带宽使用来对所述第0层DWDM带宽和所述第1层OTN带宽进行统计复用。

公开(公告)号：US09172658B2

公开(公告)日：2015-10-27

申请号：US13783764

申请日：2013-03-04

申请人： Vikas Kakkar ,  Kapil Juneja ,  Anurag Prakash ,  Mohit Chhillar

发明人： Vikas Kakkar ,  Kapil Juneja ,  Anurag Prakash ,  Mohit Chhillar

IPC分类号： H04B10/032 ,  H04L12/911 ,  H04L12/715 ,  H04L12/913

CPC分类号： H04L47/728 ,  H04L45/04 ,  H04L47/724

摘要： Call setup methods in a multi-domain network and a multi-domain network use dynamic link tagging and/or overbooking of External Network-Network Interface (ENNI) links. Thus, improved call setup systems and methods include two approaches to improve upon the responsiveness of the network for connection setups including bandwidth reservation in optical networks using “dynamic link tags” and link overbooking in optical networks based on a greedy approach. The bandwidth reservation and the link overbooking can be utilized together or separately to improve call setup. Advantageously, the improved call setup systems and methods can provide a generic bandwidth reservation mechanism, such as in Automatically Switched Optical Network (ASON) networks, to overcome the limitation of ENNI in concurrently updating the abstract link bandwidth and thereby improving the responsiveness of the network.

摘要翻译： 多域网络和多域网络中的呼叫建立方法使用外部网络网络接口（ENNI）链接的动态链接标记和/或超量预订。 因此，改进的呼叫建立系统和方法包括两种方法来改进网络对连接设置的响应性，包括使用“动态链路标签”的光网络中的带宽预留和基于贪婪方法的光网络中的链接超额预订。 可以一起或分开使用带宽预留和链路超量预订来改善呼叫建立。 有利地，改进的呼叫建立系统和方法可以提供诸如在自动交换光网络（ASON）网络中的通用带宽预留机制，以克服ENNI同时更新抽象链路带宽的限制，从而提高网络的响应性 。

公开(公告)号：US08854955B2

公开(公告)日：2014-10-07

申请号：US13714516

申请日：2012-12-14

申请人： Anurag Prakash ,  Mohit Chhillar ,  Pradeep Kumar ,  Rajagopalan Kannan

发明人： Anurag Prakash ,  Mohit Chhillar ,  Pradeep Kumar ,  Rajagopalan Kannan

IPC分类号： H04J1/16 ,  H04B10/032

CPC分类号： H04B10/032 ,  H04L45/28

摘要： A method, a node, and a network include mesh restoration and bandwidth allocation systems and methods for shared risk connection groups for source-based routing control planes. The mesh restoration and bandwidth allocation systems and methods utilize signaling from a node closest to a point of failure to “advise” source nodes about protect paths to be taken for a particular unidirectional or bidirectional connection in the event of mesh restoration. Specifically, the systems and methods include an ability to correlate connection information as Shared Risk Connection Groups (SRCG) to optimally utilize network bandwidth in the event of failure. The systems and methods could also be used to optimally distribute connections in a mesh network as well, trying to utilize maximum bandwidth, in distributed or centralized environments. Effectively, the systems and method distributed path computation in the network away from solely being the responsibility of source nodes.

摘要翻译： 方法，节点和网络包括用于基于源的路由控制平面的共享风险连接组的网格恢复和带宽分配系统和方法。 网格恢复和带宽分配系统和方法利用来自最接近故障点的节点的信令，以便在网格恢复的情况下向源节点提供关于用于特定单向或双向连接的保护路径的信息。 具体来说，系统和方法包括将连接信息作为共享风险连接组（SRCG）进行关联的能力，以在发生故障时最佳地利用网络带宽。 系统和方法也可用于在网状网络中优化分布连接，并尝试在分布式或集中式环境中利用最大带宽。 有效地，网络中的系统和方法分布式路径计算不仅仅是源节点的责任。

公开(公告)号：US20130202299A1

公开(公告)日：2013-08-08

申请号：US13420717

申请日：2012-03-15

申请人： Anurag PRAKASH ,  Mohit CHHILLAR ,  Marian TRNKUS ,  Waseem Reyaz KHAN

发明人： Anurag PRAKASH ,  Mohit CHHILLAR ,  Marian TRNKUS ,  Waseem Reyaz KHAN

IPC分类号： H04J14/02

CPC分类号： H04J14/0257 ,  H04J14/0206 ,  H04J14/0215 ,  H04J14/0217 ,  H04J14/0258 ,  H04J14/0267 ,  H04J14/0269 ,  H04J14/0271 ,  H04J14/0284

摘要： A path computation method includes defining photonic constraints associated with a network, wherein the photonic constraints include wavelength capability constraints at each node in the network, wavelength availability constraints at each node in the network, and nodal connectivity constraints of each node in the network, and performing a constrained path computation in the network using Dijkstra's algorithm on a graph model of the network with the photonic constraints considered therein. An optical network includes a plurality of interconnected nodes each including wavelength capability constraints, wavelength availability constraints, and nodal connectivity constraints, and a path computation element associated with the plurality of interconnected photonic nodes, wherein the path computation element is configured to perform a constrained path computation through the plurality of interconnected nodes using Dijkstra's algorithm on a graph model with the photonic constraints considered therein.

摘要翻译： 路径计算方法包括定义与网络相关联的光子约束，其中光子约束包括网络中每个节点处的波长能力约束，网络中每个节点处的波长可用性约束以及网络中每个节点的节点连接约束，以及 使用Dijkstra算法对其中考虑的光子约束的网络的图形模型执行网络中的约束路径计算。 光网络包括多个互连节点，每个节点包括波长能力约束，波长可用性约束和节点连接性约束，以及与多个相互连接的光子节点相关联的路径计算元件，其中，路径计算元件被配置为执行约束路径 在其中考虑的光子约束的图形模型上使用Dijkstra算法通过多个互连节点进行计算。

公开(公告)号：US09485550B2

公开(公告)日：2016-11-01

申请号：US14482336

申请日：2014-09-10

申请人： Mohit Chhillar ,  Anurag Prakash ,  Seemant Bisht ,  Hari Srinivasan

发明人： Mohit Chhillar ,  Anurag Prakash ,  Seemant Bisht ,  Hari Srinivasan

IPC分类号： H04Q11/00 ,  H04J14/02

CPC分类号： H04Q11/0003 ,  H04J14/0227 ,  H04J14/0257 ,  H04J14/0271 ,  H04L45/02 ,  H04L45/12 ,  H04L45/26 ,  H04L45/28 ,  H04L45/64 ,  H04Q11/0005 ,  H04Q11/0062 ,  H04Q2011/0073

摘要： A method, in an intermediate node in a control plane network, includes receiving a setup message from an originating node, wherein the setup message is sent towards a terminating node on a computed path in the control plane network, and the setup message indicates associated Layer 0 attributes; validating the associated attributes/constraints based on locally available resources; and performing one of: forwarding the setup message on the path towards the terminating node when validation is successful; forwarding the setup message on the path towards the terminating node with updated information indicating a rejection cause and additional information when the validation is unsuccessful, but a modification of the Layer 0 attributes/constraints is possible; and forwarding a release message on the path back to the originating node with updated information indicating a rejection cause and additional information when the validation is unsuccessful and no modifications of the Layer 0 attributes/constraints are possible.

摘要翻译： 一种在控制平面网络中的中间节点中的方法，包括从起始节点接收建立消息，其中所述建立消息被发送到所述控制平面网络中计算的路径上的终止节点，并且所述建立消息指示相关联的层 0属性; 基于本地可用资源验证相关属性/约束; 并执行以下步骤之一：当验证成功时，将路径上的建立消息转发到终止节点; 当验证不成功时，向终止节点路径转发建立消息，该更新信息指示拒绝原因和附加信息，但可以修改第0层属性/约束; 以及当所述验证不成功且不能修改所述第0层属性/约束时，将所述路径上的释放消息转发回所述始发节点，所述更新信息指示拒绝原因和附加信息。

公开(公告)号：US20160105380A1

公开(公告)日：2016-04-14

申请号：US14554115

申请日：2014-11-26

申请人： Mohit CHHILLAR ,  Anurag PRAKASH ,  Gerard Leo SWINKELS

发明人： Mohit CHHILLAR ,  Anurag PRAKASH ,  Gerard Leo SWINKELS

IPC分类号： H04L12/939 ,  H04L12/911 ,  H04L12/937

CPC分类号： H04L49/557 ,  H04L45/22 ,  H04L45/28 ,  H04L45/64 ,  H04L47/72 ,  H04L49/253

摘要： A Make-Before-Break (MBB) method, in a node operating in a network with a control plane, decoupling the control plane from a data plane, includes, for a connection operating on a path in the network, determining a reserved connection on a new path, through the control plane, wherein the reserved connection has zero bandwidth; signaling the reserved connection on the new path; creating the reserved connection in the control plane while suspending implementation in the data plane due to the zero bandwidth; and releasing the connection on the path and modifying the reserved connection on the new path to establish the connection on the new path.

摘要翻译： 在具有控制平面的网络中操作的节点中的前后断（MBB）方法包括对在网络上的路径上操作的连接来确定在网络上的保留连接 通过控制平面的新路径，其中预留连接具有零带宽; 在新路径上发信号通知保留的连接; 在控制平面中创建保留的连接，同时由于零带宽而将实现暂停在数据平面中; 并释放路径上的连接并修改新路径上的保留连接以在新路径上建立连接。