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1.发明申请APPARATUS AND METHOD FOR COMPUTING END-TO-END PATHS THROUGH A NETWORK COMPRISING A PLURALITY OF NETWORK DOMAINS 审中-公开通过包含多个网络域的网络计算端到端的设备和方法公开(公告)号：US20150163125A1
公开(公告)日：2015-06-11
申请号：US14386151
申请日：2012-04-05
IPC分类号： H04L12/751 , H04L12/721 , H04L12/723
摘要： A network architecture is provided for enabling end-to-end paths to be computed across a plurality of network domains. The network architecture comprises a plurality of child path computation elements associated with a plurality of respective network domains, each child path computation element adapted to compute a path segment within its respective network domain. A parent path computation element adapted to compute an end-to-end path across a plurality of network domains in conjunction with the plurality of respective child path computation elements.
摘要翻译： 提供了一种网络架构，用于跨多个网络域计算端到端路径。 网络架构包括与多个相应网络域相关联的多个子路径计算元件，每个子路径计算元件适于计算其各自网络域内的路径段。 父路径计算元件，适于结合多个相应的子路径计算元件计算跨多个网络域的端到端路径。
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公开(公告)号：US20150244453A1
公开(公告)日：2015-08-27
申请号：US14344973
申请日：2011-10-12
IPC分类号： H04B10/032 , H04Q11/00 , H04J14/02 , H04B10/2575
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。
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公开(公告)号：US20110004455A1
公开(公告)日：2011-01-06
申请号：US12678278
申请日：2008-09-24
申请人： Diego Caviglia , Giulio Bottari
发明人： Diego Caviglia , Giulio Bottari
IPC分类号： G06F17/50
CPC分类号： H04L41/145 , H04L41/12
摘要： A method of designing a network given a set of network nodes, a set of adjacencies defining which nodes can be connected together directly and so are topologically adjacent and a traffic matrix comprising a plurality of entries each indicating a source node, a destination node and a number being the number of connections from the source node to the destination node that are to be present in the network; the method comprising the steps of: simulating the network nodes and the adjacencies thereof to generate a simulated network; simulating applying the traffic matrix entry by entry, each application of an entry causing a number of links consistent with the entry to be simulated between the source and destination nodes indicated in the entry, via a chain of topologically adjacent nodes; simulating the effect of at least one failure on the simulated network, including simulating the re-routing of the links onto a replacement chain where the chain is broken; determining the number of links between each pair of topologically adjacent nodes; repeating these steps for a plurality of iterations, the order in which the entries in the traffic matrix and the faults are applied being different in different iterations; for each iteration and for each topologically adjacent pair of nodes, determining an average number of links between the pair of nodes for all iterations so far; for each iteration and for each pair of topologically adjacent pair of nodes, determining a variance in the average number of links for all iterations so far; for each iteration, determining an average variance in the average number of links for all iterations so far, the average being taken across the entire network; for each iteration, determining a variance in the variances in the average number of links for all iterations so far, the variance being taken across the entire network; determining when to cease iterating based upon the variance in the variances in the average number of links.
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公开(公告)号：US20150249549A1
公开(公告)日：2015-09-03
申请号：US14408794
申请日：2012-07-23
IPC分类号： H04L12/46 , H04L12/939
CPC分类号： H04L12/4633 , H04L49/555
摘要： A Common Public Radio Interface (CPRI) link involves using a protocol stack having a CPRI layer and an emulation layer to emulate a point to point link, to enable the CPRI link to operate over a packet switched network. The emulation layer can be a pseudowire emulation which encapsulates multiple CPRI frames in a packet with overhead. A multiplexing layer such as Internet Protocol (IP) or Multiprotocol Label Switching (MPLS) can be used, for sending the packet over an Ethernet network. The usual need for a point to point infrastructure for the CPRI link can be avoided and the CPRI link can be implemented over more complex but usually cheaper packet networks, thus reducing costs or enabling more widespread application over existing packet networks. This applies whether the packet network is dedicated to the CPRI link, or shared with other packets. It can be useful for distributed radio base stations.
摘要翻译： 通用公共无线电接口（CPRI）链路涉及使用具有CPRI层和仿真层的协议栈来模拟点对点链路，以使得CPRI链路能够通过分组交换网络进行操作。 仿真层可以是在具有开销的分组中封装多个CPRI帧的伪线仿真。 可以使用诸如因特网协议（IP）或多协议标签交换（MPLS）的复用层，用于通过以太网发送分组。 可以避免对CPRI链路的点对点基础设施的通常需要，并且可以通过更复杂但通常更便宜的分组网络来实现CPRI链路，从而降低成本或使现有分组网络上的应用更广泛。 这适用于分组网络是专用于CPRI链路还是与其他分组共享。 这对于分布式无线电基站是有用的。
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公开(公告)号：US09559947B2
公开(公告)日：2017-01-31
申请号：US14394140
申请日：2012-04-13
IPC分类号： H04L12/703 , H04Q3/00 , H04L12/717 , H04L12/24 , H04L12/723 , H04L12/707
CPC分类号： H04L45/28 , H04L41/0663 , H04L41/0681 , H04L45/22 , H04L45/42 , H04L45/50 , H04Q3/0079
摘要： Recovery from failure of a working path for communications traffic in a connection-oriented network, where the working path has a preplanned recovery path, involves initiating recovery by requesting computation of a new recovery path for the communications traffic to avoid the failure. If the recovery is not successful within a time limit, recovery is carried out using the preplanned recovery path. Determining if the recovery is not successful and initiating the recovery using the preplanned recovery path can be controlled by an ingress node of the working path. By trying to compute a new recovery path first, network resources can be used more efficiently, as the new recovery path is likely to reuse most of the working path, since it is computed knowing the location of the fault.
摘要翻译： 通过面向连接的网络（其中工作路径具有预先计划的恢复路径）的通信流量的工作路径的故障恢复涉及通过请求计算通信业务的新的恢复路径来避免故障来启动恢复。 如果在一段时间内恢复不成功，则使用预先计划的恢复路径进行恢复。 确定恢复是否成功，并使用预先计划的恢复路径启动恢复可以由工作路径的入口节点控制。 通过尝试首先计算新的恢复路径，可以更有效地使用网络资源，因为新的恢复路径很可能重用大部分工作路径，因为它是计算知道故障位置的。
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公开(公告)号：US09559770B2
公开(公告)日：2017-01-31
申请号：US14344973
申请日：2011-10-12
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。
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公开(公告)号：US09130668B2
公开(公告)日：2015-09-08
申请号：US12994366
申请日：2010-07-23
IPC分类号： H04B10/038 , H04B10/00 , H04J14/02
CPC分类号： H04B10/038 , H04J14/0212 , H04J14/0221 , H04J14/0258 , H04J14/0267 , H04J14/0268 , H04J14/0289 , H04J14/0293 , H04Q2213/1301
摘要： A connection-oriented optical network (2) comprises nodes (10) and optical links (5) between nodes. Each node (10) has a power control unit (60) for controlling an optical amplifier (43) at the node. A node, in response to a requirement to set up a new connection in the network, signals to a power control unit (60) at each of a plurality of downstream nodes along a path of the new connection to cause the power control unit at the node to adjust the optical amplifier at the node to support a new optical channel to carry the new connection. The node (10) can signal to tear down an existing connection in a similar way. A downstream node determines a number of optical channels for which the optical amplifier can be adjusted concurrently, based on an existing number of active optical channels.
摘要翻译： 面向连接的光网络（2）包括节点（10）和节点之间的光链路（5）。 每个节点（10）具有用于控制节点处的光放大器（43）的功率控制单元（60）。 响应于在网络中建立新连接的要求，节点向沿着新连接的路径的多个下游节点中的每一个处的功率控制单元（60）发信号，以使功率控制单元处于 节点调整节点处的光放大器，以支持新的光通道携带新连接。 节点（10）可以以类似的方式发信号通知现有的连接。 下游节点基于现有的有效光信道数，确定可以同时调整光放大器的光信道数。
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公开(公告)号：US08934768B2
公开(公告)日：2015-01-13
申请号：US13699799
申请日：2010-06-16
摘要： A method of configuring a path between an ingress node and an egress node in an optical communications network, the path comprising a first hop and a subsequent hop. The method includes: a) selecting a candidate hop for the first hop of the path; b) obtaining a value of a signal feasibility parameter for the candidate hop; c) determining whether said value lies within an acceptable value range and if one is, accepting said candidate hop for the first hop of the path, and if one is not, repeating steps a. to c.; d) selecting a candidate hop for the subsequent hop of path; e) obtaining a value of a signal feasibility parameter for a combined path comprising the first hop and the candidate hop for the subsequent hop of the path; f) determining whether said value lies within an acceptable value range, if one is, acceptable value range accepting said candidate hop for the subsequent hop of the path, and if one is not, repeating steps d. and e.; and g) generating and transmitting a control signal for configuring the path. Each step of obtaining a value of a signal feasibility parameter comprises checking whether a measured value of the signal feasibility parameter is available, and if one is, retrieving said measured value and if one is not, calculating an estimated value of the signal feasibility parameter.
摘要翻译： 一种在光通信网络中配置入口节点和出口节点之间的路径的方法，所述路径包括第一跳和后续跳。 该方法包括：a）选择路径第一跳的候选跳; b）获得候选跳的信号可行性参数的值; c）确定所述值是否在可接受的值范围内，如果是，则接受所述路径的第一跳的所述候选跳，如果不是，则重复步骤a。 到C. d）为随后的路径跳跃选择候选跳; e）获得用于组合路径的信号可行性参数的值，所述组合路径包括所述路径的后续跳跃的所述第一跳和候选跳; f）确定所述值是否在可接受的值范围内，如果是接受所述路径的后续跳跃的所述候选跳跃的可接受值范围，并且如果不是，则重复步骤d。 和e。 以及g）生成和发送用于配置路径的控制信号。 获取信号可行性参数的值的每个步骤包括检查信号可行性参数的测量值是否可用，并且如果是，检索所述测量值，如果不是，则计算信号可行性参数的估计值。
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公开(公告)号：US20130142508A1
公开(公告)日：2013-06-06
申请号：US13699799
申请日：2010-06-16
IPC分类号： H04B10/27
摘要： A method of configuring a path between an ingress node and an egress node in an optical communications network, the path comprising a first hop and a subsequent hop. The method includes: a) selecting a candidate hop for the first hop of the path; b) obtaining a value of a signal feasibility parameter for the candidate hop; c) determining whether said value lies within an acceptable value range and if one is, accepting said candidate hop for the first hop of the path, and if one is not, repeating steps a. to c.; d) selecting a candidate hop for the subsequent hop of path; e) obtaining a value of a signal feasibility parameter for a combined path comprising the first hop and the candidate hop for the subsequent hop of the path; f) determining whether said value lies within an acceptable value range, if one is, acceptable value range accepting said candidate hop for the subsequent hop of the path, and if one is not, repeating steps d. and e.; and g) generating and transmitting a control signal for configuring the path. Each step of obtaining a value of a signal feasibility parameter comprises checking whether a measured value of the signal feasibility parameter is available, and if one is, retrieving said measured value and if one is not, calculating an estimated value of the signal feasibility parameter.
摘要翻译： 一种在光通信网络中配置入口节点和出口节点之间的路径的方法，所述路径包括第一跳和后续跳。 该方法包括：a）选择路径第一跳的候选跳; b）获得候选跳的信号可行性参数的值; c）确定所述值是否在可接受的值范围内，如果是，则接受所述路径的第一跳的所述候选跳，如果不是，则重复步骤a。 到C. d）为随后的路径跳跃选择候选跳; e）获得用于组合路径的信号可行性参数的值，所述组合路径包括所述路径的后续跳跃的所述第一跳和候选跳; f）确定所述值是否在可接受的值范围内，如果是接受所述路径的后续跳跃的所述候选跳跃的可接受值范围，并且如果不是，则重复步骤d。 和e。 以及g）生成和发送用于配置路径的控制信号。 获取信号可行性参数的值的每个步骤包括检查信号可行性参数的测量值是否可用，并且如果是，检索所述测量值，如果不是，则计算信号可行性参数的估计值。
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公开(公告)号：US20120237207A1
公开(公告)日：2012-09-20
申请号：US13095053
申请日：2011-04-27
IPC分类号： H04B17/00
CPC分类号： H04J14/0227 , H04J14/0257 , H04J14/0267 , H04J14/0268 , H04J14/0269 , H04J14/0271
摘要： The invention relates to a method in a border node of an optical network and in an external optical channel originating apparatus and to a border node of an optical network and a router. The invention is particularly applicable to optical path validation in an optical network for an externally originating optical channel. The invention may be used during an optical path fault recovery operation.In the method in a border node of an optical network optical channel traffic parameter associated with an optical channel are received from an optical channel originator external to the optical network. The received optical channel traffic parameters are used to determine the suitability of at least one optical path within the optical network for an externally originating optical channel. If a suitable optical path is determined an optical channel availability message indicating the availability at the border node of an optical path within the optical network for the optical channel is sent to the optical channel originator.In the method in an optical channel originator external to an optical network the optical channel traffic parameters associated with an optical channel originating at the optical channel originator are sent to a border node of the optical network. An optical channel availability message indicating the availability at the optical network border node of an optical path within the optical network for the optical channel with which the optical channel traffic parameters are associated is received from the border node. An available optical channel status of the optical channel is determined from the received optical channel availability message for the optical channel.
摘要翻译： 本发明涉及光网络和外部光信道发起装置的边界节点和光网络和路由器的边界节点的方法。 本发明特别适用于用于外部发送光信道的光网络中的光路验证。 本发明可以在光路故障恢复操作期间使用。 在光网络的光信道发起方接收与光信道相关联的光网络光信道业务参数的边界节点中的方法。 所接收的光信道业务参数用于确定用于外部发起的光信道的光网络内的至少一个光路的适用性。 如果确定合适的光路，则向光信道发起者发送指示在光信道的光网络内的光路的边界节点处的可用性的光信道可用性消息。 在光网络外部的光信道发起方的方法中，将与在光信道发起方发起的光信道相关联的光信道业务参数发送到光网络的边界节点。 从边界节点接收光信道可用性消息，指示光网络边界节点对于光信道业务参数所关联的光信道的光网络内的光路的可用性。 从所接收的光信道的光信道可用性消息确定光信道的可用光信道状态。
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