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公开(公告)号：US07046619B2
公开(公告)日：2006-05-16
申请号：US10045955
申请日：2001-11-06
申请人： Sridhar Alagar , Brian Pheiffer , Rohit Sharma , Stephane St. Laurent , Holden D. Jessup , Rainer Iraschko
发明人： Sridhar Alagar , Brian Pheiffer , Rohit Sharma , Stephane St. Laurent , Holden D. Jessup , Rainer Iraschko
IPC分类号： H04L1/00
CPC分类号： H04J14/0295 , H04J14/0227 , H04J14/0241 , H04J14/0283 , H04J14/0284 , H04J14/0286 , H04J14/0291 , H04J14/0294 , H04J2203/0042 , H04J2203/006 , H04L1/22
摘要： A system for use in a bi-directional path switched ring network for detecting a failed optical path and establishing a protection path so as to allow signals from the failed optical path to be re-routed via the protection path is provided. According to one aspect of the system, upon detecting a failure relating to an optical path, the destination node generates a connection request message for transmission to the source node. The connection request message is passed to the source node via one or more intermediate nodes, if any. Each intermediate node examines the connection request message accordingly reserves the requisite wavelength from the protection capacity so as to allow signals from the failed optical path to be re-routed. Upon receiving the connection request message, the source node readies its switching equipment to re-route signals from the failed optical path and generates an acknowledgment message and propagates it back to the destination node via the intermediate nodes. The intermediate nodes and the destination node, upon receipt of the acknowledgement message, also ready their respective switching equipment to carry the re-routed signals via the previously reserved wavelength from the protection capacity. According to another aspect of the system, a contention resolution mechanism is provided to resolve contending connection request messages received at a node requesting the same wavelength to be reserved from the protection capacity for different failed optical paths. A message format is used for the connection request which allows the connection request message to include information relating to the type of failure experienced by a failed optical path and other priority data. Such information is then used by a node to determine priority between two contending connection request messages.
摘要翻译： 提供一种用于双向路径交换环网的系统，用于检测故障光路并建立保护路径，以便允许来自故障光路的信号经由保护路径重新路由。 根据系统的一个方面，在检测到与光路相关的故障时，目的节点生成用于传输到源节点的连接请求消息。 连接请求消息通过一个或多个中间节点（如果有的话）被传递到源节点。 相应地，检查连接请求消息的每个中间节点保留来自保护容量的所需波长，以便允许来自故障光路的信号被重新路由。 在接收到连接请求消息时，源节点准备其交换设备以重新路由来自故障光路的信号，并产生确认消息，并经由中间节点将其传播回目的地节点。 中间节点和目的地节点在接收到确认消息时也准备好它们各自的交换设备，以经由先前保留的波长从保护容量携带重新路由的信号。 根据该系统的另一方面，提供了一种争用解决机制，以解决在针对不同的故障光路径的保护容量中要求保留相同波长的节点处接收到的竞争连接请求消息。 用于连接请求的消息格式，其允许连接请求消息包括与由故障光路和其他优先级数据经历的故障类型有关的信息。 这样的信息然后被节点用来确定两个竞争连接请求消息之间的优先级。
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公开(公告)号：US07079723B2
公开(公告)日：2006-07-18
申请号：US10093844
申请日：2002-03-08
IPC分类号： G02B6/26
CPC分类号： H04J14/0297 , H04J14/0204 , H04J14/0209 , H04J14/0212 , H04J14/0213 , H04J14/0217 , H04J14/0219 , H04J14/0282 , H04Q11/0005 , H04Q2011/0016 , H04Q2011/0024 , H04Q2011/0026 , H04Q2011/0032 , H04Q2011/0043 , H04Q2011/0052 , H04Q2011/0075
摘要： An optical wavelength cross connect is provided to receive multiple input optical signals that each have multiple spectral bands and to transmit multiple output optical signals that each have one or more of those spectral bands. The optical wavelength cross connect includes multiple wavelength routing elements, which are optical components that selectively route wavelength components between one optical signal and multiple optical signals in either direction according to a configurable state. As used within the optical wavelength cross connect, each of the wavelength routing elements receives at least one optical signal corresponding to one of the input optical signals. A mapping of the spectral bands to the output optical signals is determined by the states of the wavelength routing elements.
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3.发明授权Method, apparatus, and computer program product for optical network restoration 失效用于光网络恢复的方法，设备和计算机程序产品
公开(公告)号：US6111672A
公开(公告)日：2000-08-29
申请号：US26641
申请日：1998-02-20
CPC分类号： H04J14/0295 , H04J14/0227 , H04J14/0241 , H04J14/0284 , H04Q11/0062 , H04Q2011/0079 , H04Q2011/0081
摘要： An method, apparatus, and computer program product for restoring a failed system in an optical mesh network. A system includes a first light termination element (LTE) and a second LTE. A first node in the network includes an optical switching unit (OSU) coupled to the first (LTE) of the system. A second node in the network includes a second OSU coupled to the second (LTE) of the system. The first node is coupled to the second node by a path. Optical data traffic can be transmitted between the first node and the second node via the path. Upon detection of a failure of the system, the first OSU and second OSU are notified of the failure. A primary role is assigned to one of the first and second OSUs, and a secondary role is assigned to the other one of the first and second OSUs. A primary restoration plan is determined by the primary OSU. Information identifying the primary restoration plan is sent from the primary OSU for effecting the restoration path to restore the system.
摘要翻译： 一种用于恢复光网状网络中的故障系统的方法，装置和计算机程序产品。 一种系统包括第一光终端元件（LTE）和第二LTE。 网络中的第一节点包括耦合到系统的第一（LTE）的光交换单元（OSU）。 网络中的第二节点包括耦合到系统的第二（LTE）的第二OSU。 第一节点通过路径耦合到第二节点。 光数据业务可以经由路径在第一节点和第二节点之间传输。 在检测到系统故障时，第一OSU和第二OSU被通知该故障。 主要角色分配给第一和第二OSU中的一个，并且次要角色被分配给第一和第二OSU中的另一个。 主要的恢复计划由主要的OSU决定。 从主OSU发送标识主恢复计划的信息，以实现恢复路径以恢复系统。
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4.发明授权公开(公告)号：US06377374B1
公开(公告)日：2002-04-23
申请号：US09441527
申请日：1999-11-16
IPC分类号： H04J1402
CPC分类号： H04J14/0295 , H04J14/0227 , H04J14/0241 , H04J14/0284 , H04Q11/0062 , H04Q2011/0079 , H04Q2011/0081
摘要： An method, apparatus, and computer program product for restoring a failed system in an optical mesh network. A system includes a first light termination element (LTE) and a second LTE. A first node in the network includes an optical switching unit (OSU) coupled to the first (LTE) of the system. A second node in the network includes a second OSU coupled to the second (LTE) of the system. The first node is coupled to the second node by a path. Optical data traffic can be transmitted between the first node and the second node via the path. Upon detection of a failure of the system, the first OSU and second OSU are notified of the failure. A primary role is assigned to one of the first and second OSUs, and a secondary role is assigned to the other one of the first and second OSUs. A primary restoration plan is determined by the primary OSU. Information identifying the primary restoration plan is sent from the primary OSU for effecting the restoration path to restore the system.
摘要翻译： 一种用于恢复光网状网络中的故障系统的方法，装置和计算机程序产品。 一种系统包括第一光终端元件（LTE）和第二LTE。 网络中的第一节点包括耦合到系统的第一（LTE）的光交换单元（OSU）。 网络中的第二节点包括耦合到系统的第二（LTE）的第二OSU。 第一节点通过路径耦合到第二节点。 光数据业务可以经由路径在第一节点和第二节点之间传输。 在检测到系统故障时，第一OSU和第二OSU被通知该故障。 主要角色分配给第一和第二OSU中的一个，并且次要角色被分配给第一和第二OSU中的另一个。 主要的恢复计划由主要的OSU决定。 从主OSU发送标识主恢复计划的信息，以实现恢复路径以恢复系统。
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