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    METHOD AND APPARATUS TO IMPROVE LDP CONVERGENCE USING HIERARCHICAL LABEL STACKING
    1.
    发明公开
    METHOD AND APPARATUS TO IMPROVE LDP CONVERGENCE USING HIERARCHICAL LABEL STACKING 审中-公开
    方法和设备对于分层标签带肺OPTMIERTE LDP收敛BASIS

    公开(公告)号：EP2619950A1

    公开(公告)日：2013-07-31

    申请号：EP11764618.2

    申请日：2011-09-16

    申请人： Telefonaktiebolaget L M Ericsson (publ)

    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.

    SIGNALING A LABEL SWITCHED PATH (LSP) TUNNELING MODEL
    2.
    发明公开
    SIGNALING A LABEL SWITCHED PATH (LSP) TUNNELING MODEL 有权
    标签的信令交换式TUNNELUNGSMODELLS

    公开(公告)号：EP2735126A1

    公开(公告)日：2014-05-28

    申请号：EP12751608.6

    申请日：2012-07-10

    申请人： Telefonaktiebolaget L M Ericsson (publ)

    发明人： KINI, Sriganesh ,  D'SOUZA, Pramodh

    IPC分类号： H04L12/70 ,  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).

    MULTIPATH TRANSMISSION CONTROL PROTOCOL PROXY
    3.
    发明公开
    MULTIPATH TRANSMISSION CONTROL PROTOCOL PROXY 有权
    多路径传输控制协议代理

    公开(公告)号：EP2628287A1

    公开(公告)日：2013-08-21

    申请号：EP11781631.4

    申请日：2011-10-12

    申请人： Telefonaktiebolaget L M Ericsson (publ)

    发明人： KINI, Sriganesh

    IPC分类号： H04L29/06 ,  H04L12/56

    CPC分类号： H04L45/24 ,  H04L69/14 ,  H04L69/165

    摘要： An edge router runs a Multipath Transmission Control Protocol (MPTCP) proxy to allow for a host that implements TCP (Transmission Control Protocol) to operate normally yet reap the benefits of an MPTCP connection. An upgrade of a TCPIP stack on the host is not necessary. The edge router demultiplexes packets received from the host over a TCP connection to an MPTCP connection and multiplexes packets sent to the host over an MPTCP connection to a TCP connection. As a result, higher throughput of packet communication can be realized, for example, for improved video support.

    摘要翻译： 边缘路由器运行多路径传输控制协议（MPTCP）代理，以允许实现TCP（传输控制协议）的主机正常运行，但获得MPTCP连接的好处。 主机上的TCPIP堆栈升级不是必需的。 边缘路由器将通过TCP连接从主机接收的数据包解复用到MPTCP连接，并将通过MPTCP连接发送到主机的数据包复用到TCP连接。 结果，例如，为了改善视频支持，可以实现更高的分组通信吞吐量。

    EFFICIENT ENCAPSULATION OF PACKETS TRANSMITTED ON A PACKET-PSEUDOWIRE OVER A PACKET SWITCHED NETWORK
    6.
    发明公开
    EFFICIENT ENCAPSULATION OF PACKETS TRANSMITTED ON A PACKET-PSEUDOWIRE OVER A PACKET SWITCHED NETWORK 审中-公开
    对分组伪线关于分组EFFICIENT ENCAPSULATION交换网络发送的数据包

    公开(公告)号：EP2561649A1

    公开(公告)日：2013-02-27

    申请号：EP11720585.6

    申请日：2011-04-08

    申请人： Telefonaktiebolaget L M Ericsson (PUBL)

    发明人： KINI, Sriganesh ,  SINICROPE, David

    IPC分类号： H04L12/46 ,  H04L29/06 ,  H04L12/56

    CPC分类号： H04L12/4633 ,  H04L45/50 ,  H04L45/68 ,  H04L69/16 ,  H04L69/22 ,  H04L2212/00

    摘要： Improving efficiency of encapsulation for packets of a first set of one or more protocols on a packet-pseudowire over a tunnel in a Packet Switched Network (PSN) is described. A first provider edge (PE) network element is coupled with a customer edge (CE) network element over an attachment circuit and is coupled with a second PE network element over the packet-pseudowire. The first provider edge network element receives a frame from the CE network element over the attachment circuit. Responsive to the first PE network element determining that the frame encapsulates a packet of the first set of protocols, the first PE network element encapsulates the packet into a protocol data unit for transmission over the packet-pseudowire without including substantially all of the plurality of fields of the data link layer header. The first PE network element transmits the protocol data unit over the packet-pseudowire over the PSN tunnel to the second PE network element. Efficiency is improved through a reduction of overhead on the packet-pseudowire by removing substantially all the fields of the data link layer header of the first frame.

    MPLS FAST RE-ROUTE USING LDP (LDP-FRR)
    8.
    发明公开
    MPLS FAST RE-ROUTE USING LDP (LDP-FRR) 有权
    使用LDP（LDP-FRR）的MPLS快速重路由

    公开(公告)号：EP2681882A1

    公开(公告)日：2014-01-08

    申请号：EP12708402.8

    申请日：2012-02-22

    申请人： Telefonaktiebolaget L M Ericsson (PUBL)

    发明人： KINI, Sriganesh ,  NARAYANAN, Srikanth

    IPC分类号： H04L12/56

    CPC分类号： H04L45/507 ,  H04L45/22 ,  H04L45/28

    摘要： MPLS (Multiprotocol Label Switching) fast re-routing using LDP (Label Distribution Protocol) is described. A first network element in a MPLS network receives a first label advertised from a second network element in the MPLS network. The first network element computes a shortest path tree (SPT) to reach a destination network element under a potential failure condition. The second network element is a nexthop of the first network element in the computed SPT and is not upstream from the potential failure condition. The first network element advertises a second label to one or more third network elements for a backup LDP LSP (Label Switched Path) that will serve as a backup when the potential failure condition is realized. The third network element(s) are upstream neighbors on the computed SPT with respect to the first network element. The first network element installs a swap action from the second label to the first label.

    摘要翻译： 描述了使用LDP（标签分发协议）的MPLS（多协议标签交换）快速重路由。 MPLS网络中的第一网络元件接收从MPLS网络中的第二网络元件通告的第一标签。 第一网元计算最短路径树（SPT）以在潜在故障情况下到达目的网元。 第二网络元素是计算的SPT中第一网络元素的下一跳，并且不在潜在故障条件的上游。 第一网络元件向用于备用LDP LSP（标签交换路径）的一个或多个第三网络元件通告第二标签，该备用LDP LSP（标签交换路径）将在潜在故障条件被实现时用作备份。 第三网络元素是关于第一网络元素在所计算的SPT上的上游邻居。 第一个网络元素从第二个标签到第一个标签安装交换操作。

    RELAYED CSPF COMPUTATION FOR MULTIPLE AREAS AND MULTIPLE AUTONOMOUS SYSTEMS
    9.
    发明公开
    RELAYED CSPF COMPUTATION FOR MULTIPLE AREAS AND MULTIPLE AUTONOMOUS SYSTEMS 有权
    自动化系统CSPF-BERECHNUNGFÜRMEHRERE BEREICH UND MEHRERE AUTONOME SYSTEME

    公开(公告)号：EP2619951A1

    公开(公告)日：2013-07-31

    申请号：EP11769935.5

    申请日：2011-09-16

    申请人： Telefonaktiebolaget L M Ericsson (publ)

    发明人： LU, Wenhu ,  KINI, Sriganesh ,  NARAYANAN, Srikanth

    IPC分类号： H04L12/56

    CPC分类号： H04L45/50 ,  H01L45/04 ,  H04L45/04 ,  H04L45/20 ,  H04L45/42

    摘要： Computing a constraint-based label switched path (LSP) that spans multiple areas is described. In one embodiment, a router in a first one of the multiple areas computes a path segment that meets a set of one or more constraints to at least one border router of the first area that lies in a path necessary to reach the destination. The router transmits a path computation request message to a path computation element (PCE) in a second one of the areas, which includes a set of one or more attributes for each computed path segment that are used by the PCE to compute one or more path segments towards the destination of the constraint-based LSP. The router receives a path computation reply message from the PCE that specifies a set of one or more computed path segments that meet the set of constraints and that were computed by one or more PCEs downstream from the router. The router stitches at least one of the set of computed path segments that are specified in the path computation reply message with the path segment computed by the router to form at least part of the constraint-based LSP.

    摘要翻译： 描述跨越多个区域的基于约束的标签交换路径（LSP）的计算。 在一个实施例中，多个区域中的第一个中的路由器计算满足一组一个或多个约束的路径段，该路径段位于位于到达目的地所必需的路径中的第一区域的至少一个边界路由器。 路由器将路径计算请求消息发送到第二区域中的路径计算元件（PCE），该第二区域包括由PCE用于计算一个或多个路径的每个计算路径段的一个或多个属性的集合 分段到基于约束的LSP的目的地。 路由器从PCE接收路径计算应答消息，该消息指定满足该组约束并由路由器下游的一个或多个PCE计算的一组或多个计算的路径段的集合。 路由器将路径计算应答消息中指定的一组计算路径段中的至少一个与路由器计算的路径段进行拼接，以形成至少部分基于约束的LSP。