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11.发明授权Optimization mechanism for use with an optical control plane in a DWDM network 有权用于DWDM网络中的光学控制平面的优化机制公开(公告)号：US08184971B2
公开(公告)日：2012-05-22
申请号：US11959630
申请日：2007-12-19
IPC分类号： H04J14/02
CPC分类号： H04J14/0227 , H04J14/0221 , H04J14/0241 , H04J14/028 , H04Q11/0062 , H04Q2011/0073 , H04Q2011/0077 , H04Q2011/0081
摘要： Methods and apparatus for efficiently utilizing an optical control plane distinct from an electronic control plane to facilitate the setup of paths in a dense wave division multiplexing network are disclosed. According to one aspect of the present invention, a method includes receiving a probe arranged determine the optical feasibility of a first path, and determining a probability of success associated with the probe. The probability of success indicates a likelihood that the probe will be successfully routed on the first path to the destination, and is associated with a particular wavelength. A second path on which to route the probe is dynamically identified if the probability indicates a low likelihood of successful routing on the first path. Finally, the method includes determining if a notification associated with the probe has been received, and altering the probability of success based on the notification if the notification has been received.
摘要翻译： 公开了用于有效利用与电子控制平面不同的光学控制平面以便于在密集波分复用网络中建立路径的方法和装置。 根据本发明的一个方面，一种方法包括接收布置的探针，确定第一路径的光学可行性，以及确定与探针相关联的成功概率。 成功的概率表示探针将成功路由到第一条路径到达目的地并与特定波长相关联的可能性。 如果概率表示在第一路径上成功路由的可能性低，则动态地识别用于路由探测的第二路径。 最后，该方法包括确定是否已经接收到与探测相关联的通知，并且如果已经接收到通知，则基于通知来改变成功的概率。
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公开(公告)号：US07801048B1
公开(公告)日：2010-09-21
申请号：US10874660
申请日：2004-06-23
摘要： Parallelism is exploited to accelerate the distributed computation of an MPLS Traffic Engineering LSP across multiple Autonomous Systems or areas using a virtual shortest path tree. After relaying a path computation request, a path computation element immediately begins local path segment computations even before a response to the request is received. When a response including virtual shortest path tree information is received, the tree is extended using the previously computed path segments. Also, a path computation element can verify the local feasibility of the requested path after receiving a request so that a requesting head-end or upstream path computation element can be quickly informed that a constraints-satisfying path is not available.
摘要翻译： 利用并行化来加速跨越多个自治系统或使用虚拟最短路径树的区域的MPLS流量工程LSP的分布式计算。 在中继路径计算请求之后，即使在接收到对请求的响应之前，路径计算元素也立即开始本地路径段计算。 当接收到包括虚拟最短路径树信息的响应时，使用先前计算的路径段来扩展树。 此外，路径计算元件可以在接收到请求之后验证所请求的路径的本地可行性，使得请求的头端或上游路径计算元件可以被快速通知约束满足路径不可用。
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公开(公告)号：US07746793B2
公开(公告)日：2010-06-29
申请号：US10871076
申请日：2004-06-18
摘要： Systems and methods for assuring consistency between MPLS forwarding and control planes. The control plane can be made aware of forwarding plane anomalies and can respond appropriately. One particular application is assuring consistency between forwarding and control planes of a Fast Reroute backup tunnels used to protect an MPLS Traffic Engineering LSP from a link and/or a node failure. When a backup tunnel forwarding failure is detected, the control plane can react by, for example, rerouting the backup tunnel and/or sending a notification to the operator or head-end of the protected Traffic Engineering LSP.
摘要翻译： 确保MPLS转发和控制平面之间一致性的系统和方法。 控制平面可以知道转发平面异常，并可以适当地做出响应。 一个特定的应用是确保用于保护MPLS流量工程LSP免受链路和/或节点故障的快速重路由备份隧道的转发和控制平面之间的一致性。 当检测到备份隧道转发失败时，控制平面可以通过例如重新路由备份隧道和/或向受保护的流量工程LSP的运营商或前端发送通知做出反应。
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14.发明申请Optimization mechanism for use with an optical control plane in a DWDM network 有权用于DWDM网络中的光学控制平面的优化机制公开(公告)号：US20090162060A1
公开(公告)日：2009-06-25
申请号：US11959630
申请日：2007-12-19
IPC分类号： H04J14/02
CPC分类号： H04J14/0227 , H04J14/0221 , H04J14/0241 , H04J14/028 , H04Q11/0062 , H04Q2011/0073 , H04Q2011/0077 , H04Q2011/0081
摘要： Methods and apparatus for efficiently utilizing an optical control plane distinct from an electronic control plane to facilitate the setup of paths in a dense wave division multiplexing network are disclosed. According to one aspect of the present invention, a method includes receiving a probe arranged determine the optical feasibility of a first path, and determining a probability of success associated with the probe. The probability of success indicates a likelihood that the probe will be successfully routed on the first path to the destination, and is associated with a particular wavelength. A second path on which to route the probe is dynamically identified if the probability indicates a low likelihood of successful routing on the first path. Finally, the method includes determining if a notification associated with the probe has been received, and altering the probability of success based on the notification if the notification has been received.
摘要翻译： 公开了用于有效利用与电子控制平面不同的光学控制平面以便于在密集波分复用网络中建立路径的方法和装置。 根据本发明的一个方面，一种方法包括接收布置的探针，确定第一路径的光学可行性，以及确定与探针相关联的成功概率。 成功的概率表示探针将成功路由到第一条路径到达目的地并与特定波长相关联的可能性。 如果概率表示在第一路径上成功路由的可能性低，则动态地识别用于路由探测的第二路径。 最后，该方法包括确定是否已经接收到与探测相关联的通知，并且如果已经接收到通知，则基于通知来改变成功的概率。
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15.发明授权Transparent re-routing of MPLS traffic engineering LSPs within a link bundle 有权链路束内MPLS流量工程LSP的透明重路由公开(公告)号：US07345994B2
公开(公告)日：2008-03-18
申请号：US10689385
申请日：2003-10-20
IPC分类号： H04L12/56
摘要： Local rerouting around a failed component link of a link bundle is provided by immediately substituting one or more other component links of the same link bundle. The substitution of component links is performed at the point of failure without signaling to other nodes. This minimizes signaling traffic particularly when large numbers of LSPs are impacted by a single component link failure. Also, since LSP repair can be accomplished very quickly, traffic disruption is minimized.
摘要翻译： 通过立即替换相同链路束的一个或多个其他组件链路来提供围绕链路束的故障组件链路的本地重新路由。 组件链路的替换在故障点执行，而不向其他节点发信号。 这特别是当大量的LSP受到单个组件链路故障的影响时，信令流量最小化。 此外，由于可以非常快速地完成LSP修复，所以流量中断被最小化。
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