公开(公告)号：US06968131B2

公开(公告)日：2005-11-22

申请号：US09963501

申请日：2001-09-27

申请人： Paul David Obeda ,  Robert Michael Bierman ,  Cuong Tu Dang ,  David Edward Nelles ,  Udo Mircea Neustadter

发明人： Paul David Obeda ,  Robert Michael Bierman ,  Cuong Tu Dang ,  David Edward Nelles ,  Udo Mircea Neustadter

IPC分类号： H04B10/02 ,  H04B10/08 ,  H04J14/02 ,  H04Q11/00 ,  H04J14/04

CPC分类号： H04B10/0773 ,  H04B2210/071 ,  H04B2210/074 ,  H04J14/0227 ,  H04J14/0284 ,  H04J14/0287 ,  H04Q2011/009

摘要： In an optical WDM network, each optical channel is modulated with a respective channel identity. Detectors, conveniently at multiplex ports of optical band filters, detect the channel identities of all of the optical channels in an optical signal at the respective points to produce respective channel lists. A network management system determines channel lists for through ports of the optical band filters, identifies matching pairs of channel lists to determine a topology of each node and to identify optical paths entering or leaving each node, and identifies matching pairs of channel lists for these paths to determine an inter-node topology of the network. The channel identity detector points can alternatively be at the optical paths entering or leaving each node.

摘要翻译： 在光WDM网络中，每个光信道用相应的信道标识进行调制。 检测器在光带滤波器的多路复用端口方便地检测在各个点的光信号中的所有光信道的信道标识，以产生相应的信道列表。 网络管理系统确定光带过滤器的通过端口的信道列表，识别匹配的信道列表对以确定每个节点的拓扑并且识别进入或离开每个节点的光路径，并且识别这些路径的匹配的信道列表对 以确定网络的节点间拓扑。 信道身份检测点可以替代地在进入或离开每个节点的光路上。

公开(公告)号：US06925061B2

公开(公告)日：2005-08-02

申请号：US10025869

申请日：2001-12-26

申请人： Byoung-Joon Lee ,  Sudhakar Ganti ,  Anand Srinivasan ,  Walter Joseph Carpini ,  Udo Mircea Neustadter ,  Cuong Tu Dang ,  Vincent Chi Chiu Wong

发明人： Byoung-Joon Lee ,  Sudhakar Ganti ,  Anand Srinivasan ,  Walter Joseph Carpini ,  Udo Mircea Neustadter ,  Cuong Tu Dang ,  Vincent Chi Chiu Wong

IPC分类号： H04L12/707 ,  H04L12/931 ,  H04L12/937 ,  H04L12/947 ,  G01R31/08 ,  H04L12/28

CPC分类号： H04L45/24 ,  H04L49/205 ,  H04L49/25 ,  H04L49/254

摘要： A routing system and method are provided which use a composite cost in identifying routes. This allows a simple way of identifying the best route taking multiple metrics into account for each link simultaneously. The system allows for the inclusion of pruning constraints, and allows for various objectives such as bin packing or load balancing to be achieved.

摘要翻译： 提供了一种使用复合成本来识别路由的路由系统和方法。 这允许一种简单的方式来识别为每个链路同时考虑多个度量的最佳路由。 该系统允许包括修剪约束，并且允许实现各种目标，例如箱包装或负载平衡。

公开(公告)号：US07187652B2

公开(公告)日：2007-03-06

申请号：US10152832

申请日：2002-05-23

申请人： Byoung-Joon Lee ,  Sudhakar Ganti ,  Anand Srinivasan ,  Walter Joseph Carpini ,  Udo Mircea Neustadter ,  Cuong Tu Dang ,  Vincent Chi Chiu Wong

发明人： Byoung-Joon Lee ,  Sudhakar Ganti ,  Anand Srinivasan ,  Walter Joseph Carpini ,  Udo Mircea Neustadter ,  Cuong Tu Dang ,  Vincent Chi Chiu Wong

IPC分类号： G01R31/08

CPC分类号： H04L49/25 ,  H04L45/24 ,  H04L49/254 ,  H04L49/30

摘要： A routing system and method are provided which use a composite cost in identifying routes. This allows a simple way of identifying the best route taking multiple metrics into account for each link simultaneously. The system allows for the inclusion of pruning constraints, and allows for various objectives such as bin packing or load balancing to be achieved.

摘要翻译： 提供了一种使用复合成本来识别路由的路由系统和方法。 这允许一种简单的方式来识别为每个链路同时考虑多个度量的最佳路由。 该系统允许包括修剪约束，并且允许实现各种目标，例如箱包装或负载平衡。

公开(公告)号：US06882627B2

公开(公告)日：2005-04-19

申请号：US09879937

申请日：2001-06-14

申请人： Peter Steven Pieda ,  Walter Joseph Carpini ,  Cuong Tu Dang ,  Kelvin Ross Edmison ,  Udo Mircea Neustadter

发明人： Peter Steven Pieda ,  Walter Joseph Carpini ,  Cuong Tu Dang ,  Kelvin Ross Edmison ,  Udo Mircea Neustadter

IPC分类号： H04L12/56 ,  H04J1/16

CPC分类号： H04L45/00 ,  H04L45/245 ,  Y02D50/30

摘要： Methods, systems, computer readable media are provided which facilitate the selection of multiple paths through a network represented by a network topology which take into account shared risk which may exist between network resources. The method involves identifying a first path through the network topology from a source node to a destination node, the first path comprising a first sequence of network resources. For at least one shared risk group, a determination is made if any of the at least one shared risk group includes any of the first sequence of network resources, a shared risk group being a group of network resources within the network topology which have a shared risk. A topology transformation is performed of the network topology into a virtual topology which discourages the use of network resources in any shared risk group determined. A second path through the virtual topology is identified from the source node to the destination. The method may be adapted to encourage node and/or edge disjointness.

摘要翻译： 提供了方法，系统，计算机可读介质，其有助于通过考虑到可能存在于网络资源之间的共享风险的由网络拓扑表示的网络来选择多个路径。 该方法包括识别通过网络拓扑从源节点到目的地节点的第一路径，第一路径包括第一序列的网络资源。 对于至少一个共享风险组，确定所述至少一个共享风险组中的任一个是否包括网络资源的第一序列中的任何一个，共享风险组是网络拓扑中的网络资源组，其具有共享 风险。 将网络拓扑结构进行拓扑变换转换为虚拟拓扑，这样就不会在确定的任何共享风险组中使用网络资源。 从源节点到目的地识别通过虚拟拓扑的第二条路径。 该方法可以适于鼓励节点和/或边缘不相容。

公开(公告)号：US07529480B2

公开(公告)日：2009-05-05

申请号：US10725025

申请日：2003-12-02

申请人： Nabil Seddigh ,  Biswajit Nandy ,  Paul David Obeda ,  Douglas Heath Patriarche ,  Udo Mircea Neustadter

发明人： Nabil Seddigh ,  Biswajit Nandy ,  Paul David Obeda ,  Douglas Heath Patriarche ,  Udo Mircea Neustadter

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

CPC分类号： H04J14/0241 ,  H04B10/0793 ,  H04J14/0227 ,  H04J14/0283 ,  H04J14/0286

摘要： A method for monitoring lightpaths in an optical network comprising nodes interconnected by wavelength-multiplexed links is disclosed. Each lightpath is identified by a respective optical signature. A node stores identifiers of optical signatures of lightpaths designated to traverse the node and identifiers of adjacent nodes. Each node also maintains a record of all optical signatures it detects. A command-line interface associated with a selected node tracks a selected lightpath, designated to traverse the selected node, by propagating messages in an upstream direction, a downstream direction, or both, requesting other nodes to provide information pertinent to the selected lightpath. The selected node may also send messages to all its neighboring nodes requesting each to indicated detection, or otherwise, of the selected lightpath. Thus, the method relies on localized information, maintained at each node, and cooperative exchange of data among nodes without interacting with a centralized network management facility.

摘要翻译： 公开了一种用于监视包括通过波分复用链路互连的节点的光网络中的光路的方法。 每个光路由相应的光学特征识别。 节点存储指定为遍历节点的光路的光学签名的标识符和相邻节点的标识符。 每个节点还维护其检测到的所有光学签名的记录。 与所选节点相关联的命令行界面通过在上行方向，下游方向或两者上传播消息来跟踪所指定的遍历所选节点的光路，请求其他节点提供与所选光路相关的信息。 所选择的节点还可以向所有其相邻节点发送消息，请求每个消息指示所选择的光路的检测或其他选择。 因此，该方法依赖于在每个节点处维护的本地化信息，并且在不与集中式网络管理设备交互的情况下在节点之间进行协作交换数据。

公开(公告)号：US07046634B2

公开(公告)日：2006-05-16

申请号：US10121654

申请日：2002-04-15

申请人： Vincent Chi Chiu Wong ,  Peter Steven Pieda ,  Udo Mircea Neustadter

发明人： Vincent Chi Chiu Wong ,  Peter Steven Pieda ,  Udo Mircea Neustadter

IPC分类号： H04J1/16

CPC分类号： H04L45/28 ,  H04L45/00 ,  H04L45/22 ,  H04L45/48

摘要： A method for selecting two maximally disjoint shortest paths between a source node and destination node in a network is provided. The method comprises determining a first explicit route between the source and destination nodes by using an original link cost for each link in the network, transforming the network by introducing conditional link costs, determining a second explicit route between the source and destination nodes in the transformed network taking into account the conditional link costs, and determining the two maximally disjoint shortest paths between the source and destination nodes by coalescing the first and second explicit routes. Beneficially, the step of introducing conditional link costs comprises adding additional parameters to links in the network and determining the conditional link costs depending on the position of each link relative to the first explicit route. Corresponding method for determining “N” maximally disjoint paths in a network, wherein “N” is equal or greater than two, is also provided.

公开(公告)号：US07120165B2

公开(公告)日：2006-10-10

申请号：US10143780

申请日：2002-05-14

申请人： Angelica Grace Emelie Kasvand-Harris ,  Udo Mircea Neustadter ,  Walter Joseph Carpini ,  Barry Ding Ken Mark

发明人： Angelica Grace Emelie Kasvand-Harris ,  Udo Mircea Neustadter ,  Walter Joseph Carpini ,  Barry Ding Ken Mark

IPC分类号： H04J3/16

CPC分类号： H04L45/50 ,  H04L45/04 ,  H04Q2011/0047 ,  H04Q2011/0077

摘要： A method and system for allocating and controlling a hierarchy of labels in an MPLS network is provided. The hierarchy of labels, inserted into MPLS packets, is introduced so as to correspond to the hierarchy of sub-flows within a data flow. The labels have the established dependency so that positions of labels in the hierarchy identify a sequence of processing the labels and functions associated with the labels. The system for allocating and controlling the hierarchy of MPLS labels includes a first control plane mapper for releasing available labels, a first controller for assigning the released labels according to the hierarchy, means for transmitting the labels in the network, a second controller for detecting the labels, and a second control plane mapper for maintaining current label dependency within the hierarchy. If required, re-addressing of the hierarchy of labels may be performed to maintain flow-sub-flow association throughout two adjacent networks. In the preferred embodiments on the invention the method of allocating and controlling hierarchy of labels is applied to sub-flows within FA-LSP flows, and to multi-cast services in the network associated with a function of flooding and filtering data within a network node.

公开(公告)号：US07827308B2

公开(公告)日：2010-11-02

申请号：US10733327

申请日：2003-12-12

申请人： Udo Mircea Neustadter ,  Steve Joseph Grabner

发明人： Udo Mircea Neustadter ,  Steve Joseph Grabner

IPC分类号： G06F15/173

CPC分类号： H04L45/62 ,  H04J14/0258 ,  H04J14/0267 ,  H04J14/0276 ,  H04Q11/0062 ,  H04Q2011/0088

摘要： Optical link related wavekey information and other vendor specific information is distributed in a WDM network using an extension of the standard OSPF routing protocol. The extension makes use of a vendor attribute Link State Advertisement (LSA) which is a new type of opaque LSA. The vendor attribute LSAs include a Vendatt Link State Identifier (ID) field in the LSA header, and a Vendatt Type/Length/Value (TLV) structure. The Vendatt TLV includes a Vendatt-type field identifying the TLV as a Vendatt TLV, and an enterprise code field identifying the vendor whose equipment (node or network element) generates vendor attribute LSAs or is able to receive vendor attribute LSAs by the identified vendor. Vendor attribute LSAs of a specific vendor are designed to be ignored by nodes or network elements of other vendors.

摘要翻译： 使用标准OSPF路由协议的扩展，在WDM网络中分布光链路相关的波键信息和其他供应商特定信息。 该扩展使用作为新类型的不透明LSA的供应商属性Link State Advertisement（LSA）。 供应商属性LSA包括LSA头中的Vendatt链路状态标识符（ID）字段和Vendatt类型/长度/值（TLV）结构。 Vendatt TLV包括将作为Vendatt TLV的TLV标识为Vendatt的字段，以及标识其设备（节点或网络元件）生成供应商属性LSA或能够由所识别的供应商接收供应商属性LSA的供应商的企业代码字段。 特定供应商的供应商属性LSA被设计为被其他供应商的节点或网络元件忽略。