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1. 发明申请

WO2012013251A1 METHOD AND APPARATUS FOR HANDLING NETWORK RESOURCE FAILURES IN A ROUTER 审中-公开
标题翻译：在路由器中处理网络资源故障的方法和装置
公开(公告)号：WO2012013251A1
公开(公告)日：2012-02-02
申请号：PCT/EP2010/065040
申请日：2010-10-07
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) , CSÁSZÁR, András , ENYEDI, Gábor Sandor , KINI, Sriganesh
发明人： CSÁSZÁR, András , ENYEDI, Gábor Sandor , KINI, Sriganesh
IPC分类号： H04L12/24 , H04L12/56
CPC分类号： H04L43/04 , H04L43/0817 , H04L45/025 , H04L45/028 , H04L45/22 , H04L45/28
摘要： There is provided a method for use by a router in a communications network. Forwarding information is maintained (S1) which specifies the next hop node for each of a plurality of possible destination nodes. Update information is maintained (S1) which specifies how, if at all, the next hop nodes specified in the forwarding information are to be updated for a plurality of possible network resource failures. Known failure information is maintained (S1) which relates to a known network resource failure or which specifies that there is no known network resource failure. A failure notification is received (S2) relating to a network resource failure. In response to receipt of the failure notification, it is determined (S3) from the failure notification how, if at all, the known failure information is to be updated, and the known failure information is updated, if required, based on the determination (S4). A communications packet is received (S5). Various steps (S6 to S10) are carried out in response to receipt of the communications packet. The destination node for the received packet is determined (S6). It is determined (S7) whether the next hop node specified by the forwarding information for the determined destination node is potentially invalid in view of the known failure information. If so, then the next hop node for the determined destination node is updated if necessary in the forwarding information using the update information and the known failure information (S8). The next hop node is determined for the received packet using the forwarding information and the determined destination node (S9). The received packet is forwarded towards the determined next hop node (S10).
摘要翻译：提供了一种在通信网络中由路由器使用的方法。保持转发信息（S1），其指定多个可能目的地节点中的每一个的下一跳节点。维护更新信息（S1），其指定如何在多个可能的网络资源故障中如何更新在转发信息中指定的下一跳节点。保持已知的故障信息（S1），其涉及已知的网络资源故障或指定没有已知的网络资源故障。接收到与网络资源故障有关的故障通知（S2）。响应于故障通知的接收，根据故障通知确定（S3）如果根本确定（如果有的话）知道的故障信息将被更新，并且如果需要，更新已知的故障信息， S4）。接收通信分组（S5）。响应于通信分组的接收，执行各种步骤（S6至S10）。确定接收到的分组的目的地节点（S6）。鉴于已知的故障信息，确定（S7）由所确定的目的地节点的转发信息指定的下一跳节点是否潜在地无效。如果是，则如果需要，则使用更新信息和已知故障信息，在转发信息中更新所确定的目的地节点的下一跳节点（S8）。使用转发信息和所确定的目的地节点为接收的分组确定下一跳节点（S9）。接收到的分组被转发到确定的下一跳节点（S10）。

2. 发明申请

WO2009010090A1 LINK FAILURE RECOVERY METHOD AND APPARATUS 审中-公开
标题翻译：链路故障恢复方法和设备
公开(公告)号：WO2009010090A1
公开(公告)日：2009-01-22
申请号：PCT/EP2007/057322
申请日：2007-07-16
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) , CSÁSZÁR, András , ENYEDI, Gábor
发明人： CSÁSZÁR, András , ENYEDI, Gábor
IPC分类号： H04L12/56
CPC分类号： H04L41/0654 , H04L41/0681 , H04L45/00 , H04L45/18 , H04L45/22 , H04L45/28 , H04L47/12 , H04L2012/5627
摘要： A method of routing packets across a packet switched network domain, the network domain comprising a multiplicity nodes each of which comprises at least one ingress interface and at least one egress interface. For each node as destination, a default branching and a detour branching are defined, each of which specifies a route from each other node to the destination node, where, for each node which is two-edge connected, the default and detour branchings do not share a common ingress interface. For a packet flow being sent from a source to a destination node, for each node operating as an intermediate node, the following steps are carried out: receiving a packet at an ingress interface, identifying an egress interface based upon the ingress interface upon which the packet is received and the packet destination, forwarding the packet via that egress interface if the connected link is available and, if the connected link is not available, forwarding the packet via an alternative egress interface associated with said detour branching if the packet was received at an ingress interface associated with said default branching or dropping the packet if the packet was received at an ingress interface associated with said detour branching.
摘要翻译：一种在分组交换网络域上路由分组的方法，所述网络域包括多个节点，每个节点包括至少一个入口接口和至少一个出口接口。对于作为目的地的每个节点，定义了默认分支和迂回分支，每个分支指定从每个其他节点到目的地节点的路由，其中对于两边连接的每个节点，默认和迂回分支不共享一个入口接口。对于从源向目的地节点发送的分组流，对于作为中间节点操作的每个节点，执行以下步骤：在入口接口处接收分组，基于入口接口识别出口接口，其中，接收到分组和分组目的地，如果连接的链路可用，则经由该出口接口转发分组，并且如果所连接的链路不可用，则如果分组被接收到，则通过与所述迂回分支相关联的替代出口接口转发分组如果在与所述绕行分支相关联的入口接口处接收到分组，则与所述默认分支相关联的入口接口或丢弃分组。

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