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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：US09838217B2
公开(公告)日：2017-12-05
申请号：US14408794
申请日：2012-07-23
IPC分类号： H04L12/26 , 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.
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公开(公告)号：US09462358B2
公开(公告)日：2016-10-04
申请号：US14239308
申请日：2011-10-12
CPC分类号： H04Q11/0005 , H04J14/02 , H04J14/0212 , H04J14/0284 , H04J14/0294 , H04Q2011/0016 , H04Q2011/0037
摘要： An optical network is configured to provide an optical reroute over a backup path (2139) during a failure in a signal path (2133). The network comprises a first node (B). A second node (C) is coupled to receive a signal from the first node (B) via the signal path (2133), and a backup signal via the backup path (2139). The network is adapted to transmit a signal and a corresponding backup signal from the first node to the second node even when there is no failure in the signal path (2133), wherein the backup signal is blocked at the second node (C) when there is no failure in the signal path (2133). Embodiments of the invention utilize the broadcast and blocking functionalities of a wavelength selective switch (WSS) device. Such WSS devices enable, in the case of a failure of a link, the fast switchover of optical traffic onto local detours within a reduced time.
摘要翻译： 光网络被配置为在信号路径（2133）中的故障期间在备用路径（2139）上提供光学重新路由。 网络包括第一节点（B）。 第二节点（C）被耦合以经由信号路径（2133）从第一节点（B）接收信号，以及经由备用路径（2139）的备用信号。 即使在信号路径（2133）中没有故障的情况下，该网络适于将信号和对应的备份信号从第一节点发送到第二节点，其中当第二节点（C））在第二节点（C）处阻止备份信号 在信号路径中没有故障（2133）。 本发明的实施例利用波长选择开关（WSS）装置的广播和阻塞功能。 在链路故障的情况下，这样的WSS设备能够在减少的时间内快速地切换光流量到本地绕行。
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公开(公告)号：US20140294383A1
公开(公告)日：2014-10-02
申请号：US14239308
申请日：2011-10-12
CPC分类号： H04Q11/0005 , H04J14/02 , H04J14/0212 , H04J14/0284 , H04J14/0294 , H04Q2011/0016 , H04Q2011/0037
摘要： An optical network is configured to provide an optical reroute over a backup path (2139) during a failure in a signal path (2133). The network comprises a first node (B). A second node (C) is coupled to receive a signal from the first node (B) via the signal path (2133), and a backup signal via the backup path (2139). The network is adapted to transmit a signal and a corresponding backup signal from the first node to the second node even when there is no failure in the signal path (2133), wherein the backup signal is blocked at the second node (C) when there is no failure in the signal path (2133). Embodiments of the invention utilize the broadcast and blocking functionalities of a wavelength selective switch (WSS) device. Such WSS devices enable, in the case of a failure of a link, the fast switchover of optical traffic onto local detours within a reduced time.
摘要翻译： 光网络被配置为在信号路径（2133）中的故障期间在备用路径（2139）上提供光学重新路由。 网络包括第一节点（B）。 第二节点（C）被耦合以经由信号路径（2133）从第一节点（B）接收信号，以及经由备用路径（2139）的备用信号。 即使在信号路径（2133）中没有故障的情况下，该网络适于将信号和对应的备份信号从第一节点发送到第二节点，其中当第二节点（C））备份信号在第二节点 在信号路径中没有故障（2133）。 本发明的实施例利用波长选择开关（WSS）装置的广播和阻塞功能。 在链路故障的情况下，这样的WSS设备能够在减少的时间内快速地切换光流量到本地绕行。
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5.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：US08165012B2
公开(公告)日：2012-04-24
申请号：US12143160
申请日：2008-06-20
CPC分类号： H04L45/00
摘要： A method of path protection for a connection-oriented packet switched communications network is described using a protection hub in communication with a worker hub via a core protection path. Both the worker hub and the protection hub communicate with at least one provider edge device via a respective worker and protection paths. The method detects a failure in the communications network, indicates the failure to the at least one of the provider edge device, the worker hub, and the protection hub. The method then employs the core protection path if a failure occurs along a worker path is detected, or a worker path and a protection path in parallel if a failure occurs along the core protection path.
摘要翻译： 通过核心保护路径，使用与工作集线器通信的保护集线器描述面向连接的分组交换通信网络的路径保护方法。 工作人员中心和保护中心都通过相应的工作人员和保护路径与至少一个提供商边缘设备进行通信。 该方法检测通信网络中的故障，指示提供商边缘设备，工作者中心和保护集线器中的至少一个的故障。 如果沿着核心保护路径发生故障，则如果检测到沿着工作路径发生故障，则该方法采用核心保护路径，或者如果沿着核心保护路径发生故障，则工作者路径和保护路径并行。
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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：US20090003192A1
公开(公告)日：2009-01-01
申请号：US12143160
申请日：2008-06-20
IPC分类号： H04L12/24
CPC分类号： H04L45/00
摘要： A method of path protection for a connection-oriented packet switched communications network is described using a protection hub in communication with a worker hub via a core protection path. Both the worker hub and the protection hub communicate with at least one provider edge device via a respective worker and protection paths. The method detects a failure in the communications network, indicates the failure to the at least one of the provider edge device, the worker hub, and the protection hub. The method then employs the core protection path if a failure occurs along a worker path is detected, or a worker path and a protection path in parallel if a failure occurs along the core protection path.
摘要翻译： 使用保护集线器通过核心保护路径与工作集线器通信来描述面向连接的分组交换通信网络的路径保护方法。 工作人员中心和保护中心都通过相应的工作人员和保护路径与至少一个提供商边缘设备进行通信。 该方法检测通信网络中的故障，指示提供商边缘设备，工作者中心和保护集线器中的至少一个的故障。 如果沿着核心保护路径发生故障，则如果检测到沿着工作路径发生故障，则该方法采用核心保护路径，或者如果沿着核心保护路径发生故障，则工作者路径和保护路径并行。
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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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