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Method, apparatus for path recovery and path computing unit

A path calculation unit and path recovery technology, applied in the field of communications, can solve problems such as failure to establish successfully, reduce network reliability, and affect normal business operation, and achieve the effect of improving reliability and ensuring normal operation.

Inactive Publication Date: 2009-06-17
HUAWEI TECH CO LTD
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since the evolution of the network is a gradual process, not every node in the network supports the section recovery function during the evolution process. In the above-mentioned communication network, if the second node 102 and the fifth node 105 do not support the section recovery function, and the calculated recovery path is second node 102-ninth node 109-tenth node 110-fifth node 105 or third node 103-ninth node 109-tenth node 110-fifth node 105 , when establishing the restoration section through signaling the second node 102-ninth node 109-tenth node 110-fifth node 105 or the third node 103-ninth node 109-tenth node 110-fifth node 105 will If it cannot be successfully established, it may affect the normal operation of the business and reduce the reliability of the network

Method used

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  • Method, apparatus for path recovery and path computing unit
  • Method, apparatus for path recovery and path computing unit
  • Method, apparatus for path recovery and path computing unit

Examples

Experimental program
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Embodiment 1

[0024] Embodiment 1, a method for path recovery, see figure 2 , the method includes:

[0025] Step 201: Receive section restoration capability information of a network element on a control plane and a data plane.

[0026] Network elements in the network diffuse information about their recovery capabilities in the control plane and data plane sections to other network elements in the network in real time. Routing protocols such as OpenShortest-Path First (OSPF) can be used to diffuse network elements. For the section recovery capability information, in the existing network element capability field, bits are used to indicate whether the network element supports the section recovery capability.

[0027] Step 202: When a section recovery request is received, a recovery path is calculated according to the section recovery capability information of the network element in the control plane and the data plane.

[0028] When a segment in the network fails, a network element that is ...

Embodiment 2

[0039] Embodiment 2, a method for path recovery, after the network initialization is completed, the information of the recovery capability of each network element section in the network is diffused through the routing protocol, and can be diffused to other network elements or PCEs in the network; During the process, the operator may upgrade the network elements, so that the network elements that do not originally support the section recovery capability can support the section recovery capability. When the section restoration capability information of the network element changes, the updated section restoration capability information is diffused through the routing protocol, and may be diffused to other network elements or PCEs in the network. After the recovery capability information of the network element section changes, the recovery path that has been established may no longer be the optimal recovery path. This embodiment adds a step of updating the recovery path on the basi...

Embodiment 3

[0050] Embodiment 3, a method for path restoration. The methods in Embodiments 1 and 2 can be applied to various communication networks, including optical networks. In this embodiment, the restoration method in Embodiment 1 is applied to general In the generalized multi-protocol label switching protocol (Generalized Multi-protocol Label Switching, GMPLS), in this embodiment, the control device for path recovery is a node in the network, that is, the calculation method for restoring the path in this embodiment is distributed computing, using SERO means recovery path. The recovery request node is the head node of the path where the faulty segment is located. In this embodiment, the segment recovery capability information of each network element is the information of whether each network element has the Segment Recovery capability, that is, whether it supports the calculation of the distributed recovery path .

[0051] see image 3 , the recovery method of this embodiment inclu...

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Abstract

The embodiment of the invention discloses a path restoration method, which comprises receiving sectional recovery ability information of network elements in a control plane and a data plane, calculating a recovery path according to the sectional recovery ability information of the network elements in the control plane and the data plane when sectional recovery request is received, and distributing information of the recovery path to the network elements used as recovery path head nodes. The embodiment of the invention further discloses a path restoration device and a path calculation unit. The recovery path is calculated according to the information of network element sectional recovery ability through adopting the technical proposal provided by the invention, a network element which does not support sectional recovery ability is removed out of the recovery path during network evolution, thereby removing paths which can not be used, calculating usable recovery paths, guaranteeing the normal operation of businesses when the recovery path is successfully established through signaling, and improving the reliability of network.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method, device and path calculation unit for path recovery. Background technique [0002] With the rapid development of the communication network, the reliability of the communication network is becoming more and more important. Path restoration is the key technology to improve the reliability of the communication network. The link is restored to ensure normal operation of services. [0003] see figure 1 , the communication network includes a first node 101, a second node 102, a third node 103, a fourth node 104, a fifth node 105, a sixth node 106, a seventh node 107, an eighth node 108, a ninth node 109 and The tenth node 110, when the third node 103-the fourth node 104-the fifth node 105 section fails, it is necessary to restore the section of the path. The optional recovery path is: the third node 103-the fifth node 105 Eight nodes 108-sixth nodes 106 or second nodes 102...

Claims

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Application Information

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IPC IPC(8): H04L12/26H04L12/56H04L12/721
Inventor 高建华易其亮
Owner HUAWEI TECH CO LTD
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