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1. 发明申请

WO2013011420A1 SIGNALING A LABEL SWITCHED PATH (LSP) TUNNELING MODEL 审中-公开
标题翻译：信号交换路径（LSP）隧道模型
公开(公告)号：WO2013011420A1
公开(公告)日：2013-01-24
申请号：PCT/IB2012/053532
申请日：2012-07-10
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , KINI, Sriganesh , D'SOUZA, Pramodh
发明人： KINI, Sriganesh , D'SOUZA, Pramodh
IPC分类号： H04L12/56 , G01V1/40
CPC分类号： H04L12/66 , H04L45/50
摘要： Signaling a Label Switched Path (LSP) tunneling model is described. In one embodiment, a network element that is acting as an egress network element in a Multiprotocol Label Switching (MPLS) network signals multiple LSPs for multiple disparate applications provided in the MPLS network that each require a different type of tunneling model. The network element transmits a first label mapping message for one of the LSPs that includes an indication of a first tunneling model type applicable for that LSP. That LSP is to be used to transport traffic in the MPLS network for a first one of the disparate applications that requires the indicated first tunneling model type. The network element further transits a second label mapping message for a second one of the LSPs that includes an indication of a second tunneling model type applicable for that LSP. That LSP is to be used to transport traffic in the MPLS network for a second one of the disparate applications that requires the indicated second tunneling model type. The first tunneling model type and the second tunneling model type are different. In one embodiment, the first tunneling model type is a uniform tunneling model and the second tunneling model type is a pipe tunneling model (regular pipe or short-pipe).
摘要翻译：描述了标签交换路径（LSP）隧道模型的信令。在一个实施例中，作为多协议标签交换（MPLS）网络中的出口网络元件的网络元件向MPLS网络中提供的多个不同应用的多个LSP发送信号，每个LSP需要不同类型的隧道模型。网元发送包含可应用于该LSP的第一隧道模型类型的指示的LSP之一的第一标签映射消息。该LSP将用于在需要所指示的第一隧道模型类型的不同应用程序中的第一个应用中传输MPLS网络中的流量。所述网元进一步转换所述LSP中的第二标签映射消息，所述第二标签映射消息包括可应用于所述LSP的第二隧道模型类型的指示。该LSP将用于在需要所指示的第二隧道模型类型的不同应用程序中的第二个应用中传输MPLS网络中的流量。第一种隧道模型类型和第二种隧道模型类型不同。在一个实施例中，第一隧道模型类型是均匀隧道模型，第二隧道模型类型是管道隧道模型（普通管道或短管道）。

2. 发明申请

WO2012038870A1 METHOD AND APPARATUS TO IMPROVE LDP CONVERGENCE USING HIERARCHICAL LABEL STACKING 审中-公开
标题翻译：使用分层标签堆栈来提高LDP合并的方法和装置
公开(公告)号：WO2012038870A1
公开(公告)日：2012-03-29
申请号：PCT/IB2011/054070
申请日：2011-09-16
申请人： TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) , KINI, Sriganesh , D'SOUZA, Pramodh
发明人： KINI, Sriganesh , D'SOUZA, Pramodh
IPC分类号： H04L12/56
CPC分类号： H04L45/28 , H04L45/22 , H04L45/50
摘要： A method for improving LDP (Label Distribution Protocol) convergence time in an MPLS (Multi-Protocol Label Switching) network is described. An hierarchical LSP is established to transport packets belonging to a FEC attached to an egress LSR. The hierarchical LSP includes an egress LSR LSP that is common for each of the FECs attached to the egress LSR and forms a path from the ingress LSR through one or more intermediate LSRs to the egress LSR. The egress LSR LSP is used when label switching packets destined for the FECs attached to the egress LSR. The hierarchical LSP also includes a unique FEC LSP for each FEC that is used by the egress LSR to identify and forward packets to that FEC. Responsive to a topology change that changes a next-hop of the ingress LSR to reach the egress LSR, the ingress LSR modifies an entry in a forwarding structure to change the next-hop for the egress LSR LSP and does not modify substantially any forwarding structure entities for the FEC LSPs. LDP convergence time is reduced through a reduction of forwarding structure modifications after the topology change.
摘要翻译：描述了一种在MPLS（多协议标签交换）网络中改善LDP（标签分发协议）收敛时间的方法。建立分层LSP来传送属于附着到出口LSR的FEC的分组。分层LSP包括对于出口LSR附接的每个FEC共同的出口LSR LSP，并且通过一个或多个中间LSR形成从入口LSR到出口LSR的路径。当出口到出口LSR的FEC的标签交换分组时，使用出口LSR LSP。分层LSP还包括用于每个FEC的唯一FEC LSP，其由出口LSR用于识别和转发该FEC的分组。响应于改变入口LSR的下一跳到达出口LSR的拓扑变化，入口LSR修改转发结构中的条目以改变出口LSR LSP的下一跳，并且基本上不修改任何转发结构 FEC LSP的实体。在拓扑变化后，通过减少转发结构修改来减少LDP收敛时间。

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