Method and device for recovering from inter-domain link failure

• US 20080031619A1
• Filed: 07/27/2007
• Published: 02/07/2008
• Est. Priority Date: 07/15/2005
• Status: Abandoned Application

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Xu, Yongliang, Xu, Huiying
• Application Number:
  US11/881,804
• Publication Number:
  US 20080031619A1
• Time in Patent Office: Days
• US Class Current: 398/2
• CPC Class Codes: H04L 45/00 Routing or path finding of packets in data switching networks routing or path finding in wireless networks H04W40/00
• CPC Class Codes: H04L 45/04 Interdomain routing, e.g. hierarchical routing
• CPC Class Codes: H04L 45/22 Alternate routing
• CPC Class Codes: H04L 45/28 using route fault recovery
• CPC Class Codes: H04Q 11/0062 Network aspects
• CPC Class Codes: H04Q 2011/0081 Fault tolerance; Redundancy; Recovery; Reconfigurability

Abstract

A method for recovering from an inter-domain link failure includes: initiating a local recovery, by an upstream node of a failed inter-domain link, a local recovery from the link failure; performing the local recovery from the link failure with the upstream node of the failed inter-domain link as a source node and a downstream node of the failed inter-domain link as a destination node. A device for recovering from an inter-domain link failure includes: a link resource manager, adapted to detect an inter-domain link failure; a connection controller, adapted to inquire for a recovery path to a downstream node, and notifies a protocol controller to establish the recovery path; the protocol controller, adapted to establish the recovery path.

Claims

1. A method for recovering from an inter-domain link failure, comprising:

initiating a local recovery by an upstream node of a failed inter-domain link;

performing the local recovery with the upstream node of the failed inter-domain link as a source node and a downstream node of the failed inter-domain link as a destination node.

2. The method according to claim 1, wherein the local recovery is performed if the upstream node detects the inter-domain link failure or if the downstream node detects and notifies the upstream node.

3. The method according to claim 2, wherein the local recovery is performed in unit of connection.

4. The method according to claim 2, wherein the local recovery is performed on all traffics routed through the failed inter-domain link in unit of link.

5. The method according to claim 1, wherein the performing the local recovery comprises:

inquiring to obtain a recovery path to the downstream node by a connection controller at the upstream node;

initiating establishment of the recovery path from the upstream node to the downstream node by a protocol controller;

upon the establishment of the recovery path, bridging traffic on the failed inter-domain link onto the recovery path.

6. The method according to claim 5, wherein the inquiring for a recovery path to the downstream node comprises:

inquiring a routing controller for the recovery path, with the upstream node of the failed inter-domain link as a source node and the downstream node of the failed inter-domain link as a destination node for connection recovery, and calculating and returning the recovery path to the connection controller by the routing controller.

7. The method according to claim 5, wherein the inquiring for a recovery path to the downstream node comprises:

inquiring, by the connection controller, to obtain the recovery path which configured in advance and is stored locally, and using spare resource at each node on the recovery path.

8. The method according to claim 5, wherein the inquiring for a recovery path to the downstream node comprises:

inquiring, by the connection controller, to obtain the recovery path which is configured in advance and stored locally, and using reserved resource at each node on the recovery path.

9. The method according to claim 5, wherein the obtaining of the recovery path by the connection controller comprises:

determining a switching through a preset cycle composed of inter-domain links and a node.

10. The method according to claim 5, wherein the recovery path is a path composed of failure-independent inter-domain links or a path composed of links passing through one or more other domains.

11. The method according to claim 1, further comprising:

in the case of a return-type recovery from a failure, returning to the original path upon elimination of the inter-domain link failure.

12. The method according to claim 1, further comprising:

initiating automatically an end-to-end recovery in the case that the local recovery from the inter-domain link failure fails.

13. A device for recovering from an inter-domain link failure, comprising:

a link resource manager, adapted to detect an inter-domain link failure;

a connection controller, adapted to inquire for a recovery path to a downstream node, and notify a protocol controller to establish the recovery path;

the protocol controller, adapted to establish the recovery path.

14. The device according to claim 13, further comprising a routing controller, for calculating the recovery path dynamically with an upstream node of the failed inter-domain link as a source node and a downstream node of the failed inter-domain link as a destination node in response to the inquiry from the connection controller.

15. The device according to claim 13, wherein the connection controller inquiries to obtain the recovery path which is configured in advance and stored locally with a spare or reserved resource.

16. The device according to claim 13, wherein the protocol controller is further adapted to bridge traffic on the failed inter-domain link to the recovery path.