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1. 发明授权

US08682160B2 Path computation systems and methods in optical networks 有权
标题翻译：光网络中的路径计算系统和方法
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。

2. 发明授权

US08818198B2 Photonic link information collection and advertisement systems and methods 有权
标题翻译：光子链接信息收集和广告系统和方法
公开(公告)号：US08818198B2
公开(公告)日：2014-08-26
申请号：US13399276
申请日：2012-02-17
申请人： Marian Trnkus , Loudon T. Blair , Lyndon Y. Ong , Anurag Prakash , Mohit Chhillar
发明人： Marian Trnkus , Loudon T. Blair , Lyndon Y. Ong , Anurag Prakash , Mohit Chhillar
IPC分类号： H04B10/00
CPC分类号： H04J14/0275 , H04J14/021 , H04J14/0227 , H04J14/0254 , H04J14/0268 , H04J14/0272 , H04J14/0273 , H04J14/0282
摘要： Photonic link information collection and advertisement systems and methods enable photonic nodes (e.g., optical amplifiers) to operate within a control plane system in a distributed and real-time manner. For example, the photonic nodes may not require full control plane protocol stacks at each photonic node. In particular, the systems and methods provide a distributed discovery method for photonic links without requiring full participation in the control plane at the photonic nodes. Additionally, the systems and methods include network databases with amplifier configuration information in a control plane enabled network.
摘要翻译：光子链路信息收集和广告系统和方法使光子节点（例如，光放大器）能够以分布式和实时的方式在控制平面系统内操作。例如，光子节点可能不需要在每个光子节点处的完整控制平面协议栈。特别地，系统和方法为光子链路提供分布式发现方法，而不需要在光子节点处完全参与控制平面。此外，系统和方法包括在启用控制平面的网络中具有放大器配置信息的网络数据库。

3. 发明授权

US09054831B2 Optical communication network path restoration 有权
标题翻译：光通信网络路径恢复
公开(公告)号：US09054831B2
公开(公告)日：2015-06-09
申请号：US13401969
申请日：2012-02-22
申请人： Anurag Prakash , Mohit Chhillar , Marian Trnkus
发明人： Anurag Prakash , Mohit Chhillar , Marian Trnkus
IPC分类号： H04J14/00 , H04J1/16 , H04J14/02
CPC分类号： H04J14/0269 , H04J14/0268
摘要： A method and system of determining a new path through an optical network from a source node to a destination node when a link in an original path fails are disclosed. When a fault on a link is detected, adjoint weights are assigned to each operational link for each node on the original path. A connection cost is determined for each node based on the adjoint weights of the links connected to the node. A new path through the optical network is determined based at least in part on the adjoint weights and the connection costs.
摘要翻译：公开了当原始路径中的链路发生故障时，通过光网络确定从源节点到目的地节点的新路径的方法和系统。当检测到链路故障时，将伴随权重分配给原始路径上每个节点的每个操作链路。基于连接到节点的链路的伴随权重，确定每个节点的连接成本。至少部分地基于伴随权重和连接成本确定通过光网络的新路径。

4. 发明申请

US20130177311A1 PHOTONIC LINK INFORMATION COLLECTION AND ADVERTISEMENT SYSTEMS AND METHODS 有权
标题翻译：光电链接信息收集和广告系统和方法
公开(公告)号：US20130177311A1
公开(公告)日：2013-07-11
申请号：US13399276
申请日：2012-02-17
申请人： Marian Trnkus , Loudon T. Blair , Lyndon Y. Ong , Anurag Prakash , Mohit Chhillar
发明人： Marian Trnkus , Loudon T. Blair , Lyndon Y. Ong , Anurag Prakash , Mohit Chhillar
IPC分类号： H04B10/08
CPC分类号： H04J14/0275 , H04J14/021 , H04J14/0227 , H04J14/0254 , H04J14/0268 , H04J14/0272 , H04J14/0273 , H04J14/0282
摘要： Photonic link information collection and advertisement systems and methods enable photonic nodes (e.g., optical amplifiers) to operate within a control plane system in a distributed and real-time manner. For example, the photonic nodes may not require full control plane protocol stacks at each photonic node. In particular, the systems and methods provide a distributed discovery method for photonic links without requiring full participation in the control plane at the photonic nodes. Additionally, the systems and methods include network databases with amplifier configuration information in a control plane enabled network.
摘要翻译：光子链路信息收集和广告系统和方法使光子节点（例如，光放大器）能够以分布式和实时的方式在控制平面系统内操作。例如，光子节点可能不需要在每个光子节点处的完整控制平面协议栈。特别地，系统和方法为光子链路提供分布式发现方法，而不需要在光子节点处完全参与控制平面。此外，系统和方法包括在启用控制平面的网络中具有放大器配置信息的网络数据库。

5. 发明授权

US08666247B2 Bandwidth defragmentation systems and methods in optical networks 有权
标题翻译：光网络中的带宽碎片整理系统和方法
公开(公告)号：US08666247B2
公开(公告)日：2014-03-04
申请号：US12945956
申请日：2010-11-15
申请人： Hari Srinivasan , Waseem Reyaz Khan , Anurag Prakash , Saurabh Pandey
发明人： Hari Srinivasan , Waseem Reyaz Khan , Anurag Prakash , Saurabh Pandey
IPC分类号： H04J14/00
CPC分类号： H04L45/125 , H04J3/1611 , H04J3/1652 , H04J2203/0058 , H04L45/123 , H04L45/50 , H04L45/62
摘要： The present disclosure provides bandwidth defragmentation systems and methods in optical networks such as Optical Transport Network (OTN), Synchronous Optical Network (SONET), Synchronous Digital Hierarchy (SDH), Ethernet, and the like. In particular, the present invention includes bandwidth defragmentation algorithms that may be used within the context of a signaling and routing protocol to avoid bandwidth defragmentation. As such, the present invention defines a mechanism for computing an end to end path for a connection in a manner that avoids bandwidth fragmentation and provides for better network utilization. For example, the present invention may include a path computation based upon administrative weight and upon fragmentation costs. This may be implemented in existing signaling and routing protocols without changes to existing protocol messages used in topology discovery. Further, the present invention optimizes available bandwidth allowing a higher probability of higher bandwidth request being admitted.
摘要翻译：本公开提供了诸如光传输网络（OTN），同步光网络（SONET），同步数字体系（SDH），以太网等光网络中的带宽碎片整理系统和方法。特别地，本发明包括可以在信令和路由协议的上下文中使用的带宽碎片整理算法，以避免带宽碎片整理。因此，本发明定义了以避免带宽分段并提供更好的网络利用的方式来计算连接的端到端路径的机制。例如，本发明可以包括基于管理权重和分段成本的路径计算。这可以在现有的信令和路由协议中实现，而不改变在拓扑发现中使用的现有协议消息。此外，本发明优化可用带宽，允许更高带宽请求的可能性被允许。

6. 发明申请

US20120051745A1 BANDWIDTH DEFRAGMENTATION SYSTEMS AND METHODS IN OPTICAL NETWORKS 有权
标题翻译：光学网络中的带宽去除系统和方法
公开(公告)号：US20120051745A1
公开(公告)日：2012-03-01
申请号：US12945956
申请日：2010-11-15
申请人： Hari Srinivasan , Waseem Reyaz Khan , Anurag Prakash , Saurabh Pandey
发明人： Hari Srinivasan , Waseem Reyaz Khan , Anurag Prakash , Saurabh Pandey
IPC分类号： H04J14/00
CPC分类号： H04L45/125 , H04J3/1611 , H04J3/1652 , H04J2203/0058 , H04L45/123 , H04L45/50 , H04L45/62
摘要： The present disclosure provides bandwidth defragmentation systems and methods in optical networks such as Optical Transport Network (OTN), Synchronous Optical Network (SONET), Synchronous Digital Hierarchy (SDH), Ethernet, and the like. In particular, the present invention includes bandwidth defragmentation algorithms that may be used within the context of a signaling and routing protocol to avoid bandwidth defragmentation. As such, the present invention defines a mechanism for computing an end to end path for a connection in a manner that avoids bandwidth fragmentation and provides for better network utilization. For example, the present invention may include a path computation based upon administrative weight and upon fragmentation costs. This may be implemented in existing signaling and routing protocols without changes to existing protocol messages used in topology discovery. Further, the present invention optimizes available bandwidth allowing a higher probability of higher bandwidth request being admitted.
摘要翻译：本公开提供了诸如光传输网络（OTN），同步光网络（SONET），同步数字体系（SDH），以太网等光网络中的带宽碎片整理系统和方法。特别地，本发明包括可以在信令和路由协议的上下文中使用的带宽碎片整理算法，以避免带宽碎片整理。因此，本发明定义了以避免带宽分段并提供更好的网络利用的方式来计算连接的端到端路径的机制。例如，本发明可以包括基于管理权重和分段成本的路径计算。这可以在现有的信令和路由协议中实现，而不改变在拓扑发现中使用的现有协议消息。此外，本发明优化可用带宽，允许更高带宽请求的可能性被允许。

7. 发明授权

US09800522B2 Make-before-break systems and methods decoupling a control plane from a data plane 有权
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.

8. 发明申请

US20170163489A1 CONTROL PLANE DISCOVERY OF SERVICES 审中-公开
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.

9. 发明授权

US09577782B2 Systems and methods for statistical multiplexing with OTN and DWDM 有权
标题翻译：用于OTN和DWDM进行统计复用的系统和方法
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。

10. 发明授权

US09172658B2 Call setup systems and methods using dynamic link tagging and overbooking of links in multi-domain transport networks 有权
标题翻译：呼叫建立系统和方法使用多域传输网络中链路的动态链接标记和超量预订
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。

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