Method and device for path switchover

• US 8,416,747 B2
• Filed: 09/10/2010
• Issued: 04/09/2013
• Est. Priority Date: 05/09/2008
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Bai, Lianwei
• Primary Examiner(s): ROSE, KERRI M
• Application Number:
  US12/879,364
• Publication Number:
  US 20110007652A1
• Time in Patent Office: 942 Days
• Field of Search: 370/225, 370228-232, 370/252, 370/329, 370/331, 370/332, 455436-438, 455450-4522
• US Class Current: 370/332
• CPC Class Codes: H04L 45/02 Topology update or discovery
• CPC Class Codes: H04L 45/026 Details of "hello" or keep-alive messages
• CPC Class Codes: H04L 45/22 Alternate routing
• CPC Class Codes: H04L 45/308 Route determination based on user's profile, e.g. premium users
• CPC Class Codes: H04L 47/70 Admission control; Resource allocation
• CPC Class Codes: H04L 47/728 for backup paths
• CPC Class Codes: H04L 47/745 Reaction in network

Abstract

A method and device for path switchover in communications field are provided. The method includes: detecting communication quality of traffic transmitted on an active path and obtaining a detection value of the communication quality; determining whether the detection value meets a switching condition; if yes, switching the traffic transmitted on the active path to a standby path. The device includes a detecting module, an obtaining module, a determining module and a switching module. The embodiment of the present disclosure integrates the NQA technology for detecting the path communication quality and the TE FRR fast path switching technology, and the NQA detection result may trigger the TE FRR path to switch quickly. Therefore, when the signal quality of the path degrades, making the QoS requirement of the SLA hard to meet, the traffic may be switched to standby path to meet the requirement of the SLA agreed originally between the carrier and the user, so as to improve the user experience and the satisfactory degree on the service provided by the carriers.

Claims

1. A method for path switchover, comprising:

detecting communication quality of traffic transmitted on an active path and obtaining a detection value of the communication quality;

determining whether the detection value meets a switching condition;

switching the traffic transmitted on the active path to a standby path, if the switching condition is met;

determining whether a switchback condition is met after the traffic is switched from the active path to the standby path; and

switching the traffic transmitted on the standby path back to the active path if the switchback condition is met;

wherein the determining whether a switchback condition is met comprises;

obtaining a first detection value and a second detection value in turn; and

determining whether the first detection value reaches a first preset reference value and determining whether the second detection value reaches a second preset reference value;

wherein the switchback condition is met when the first detection value reaches a first preset reference value and the second detection value reaches a second preset reference value;

the switchback condition is not met when the first detection value does not reach a first preset reference value or the second detection value does not reach a second preset reference value.

2. The method of claim 1, wherein the detecting the communication quality of traffic transmitted on the active path comprises:

detecting the communication quality of traffic transmitted on the active path through Network Quality Analysis (NQA) technology.

3. The method of claim 1, wherein the determining whether the detection value meets a switching condition comprises:

determining whether the detection value is smaller than a preset reference value;

if the detection value is smaller, the switching condition is met;

if the detection value is not smaller, the switching condition is not met.

4. The method of claim 1, wherein

the active path is an IP forwarding path;

the active path is an Label Switch Path of the Label Distribution Protocol (LDP LSP);

or

the active path is an Label Switch Path of the Traffic Engineering (TE LSP).