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Method and device for determining preset routing

A technology for determining methods and routes, applied in digital transmission systems, electrical components, transmission systems, etc., can solve the problems of poor availability of preset routes and affect service recovery time, etc., so as to avoid unavailability and facilitate network planning and management Effect

Inactive Publication Date: 2011-05-11
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Since the preset routes are configured by the management plane in advance and will not be updated due to network changes, the availability of preset routes is relatively poor
In addition, when using preset routes, a selection and verification process is required, which will greatly affect the recovery time of services

Method used

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  • Method and device for determining preset routing
  • Method and device for determining preset routing

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Embodiment Construction

[0049] The basic idea of ​​the present invention is: when the network state changes, the PCE will update the saved PCC preset route according to the corresponding strategy, and compare the updated preset route with the previously saved preset route When changing, the updated preset route is notified to the PCC in time, which avoids the unavailability of the preset route. The present invention can also realize dynamic updating of routes, thereby making network planning and management more convenient.

[0050] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail by citing the following embodiments and referring to the accompanying drawings.

[0051] figure 1 It is a schematic diagram of PCE and PCC network connection, such as figure 1 shown, assuming that the figure 1 There is a service between node A and node G in , and the service route is A-B-C-G. The first service node A...

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Abstract

The invention discloses a method for determining a preset routing, which comprises the following steps that: after a preset routing service request of a PCC (path calculation client) is received, a PCE (path calculation element) carries out routing calculation and stores a calculated preset routing and the PPC is informed of the preset routing; and when a network state is changed or a configured preset routing calculative strategy is triggered, the PCE carries out routing calculation again according to the constraint conditions of a PCC request and replaces the stored preset routing with a novelly calculated preset routing and the PPC is informed of the novelly calculated preset routing. The invention also discloses a device for implementing the method. In the invention, the PCE can inform the PPC of the updated preset routing, so that unavailability of the preset routing is avoided. In the invention, dynamic updating of the routing can also be realized, so that network planing and management are more convenient.

Description

technical field [0001] The present invention relates to a determination technology of a preset route, in particular to a method and device for determining a preset route by using a Path Computation Element (PCE, Path Computation Element). Background technique [0002] Internet Task Force (IETF, Internet Engineering Task Force) in order to solve multi-protocol label switching (MPLS, Multi-Protocol Label Switching) / general multi-protocol label switching (GMPLS, Generalized Multi-Protocol Label Switching) network, based on the constraint path In order to solve the problem of special resources required for calculation, the PCE working group was established to study the related issues of path calculation. [0003] In the MPLS / GMPLS network structure based on Path Computation Unit, PCE is a functional entity in the network that is responsible for path computation. Compute an optimal path that satisfies the constraints. The PCE can be located anywhere in the network, and can be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L45/02H04L45/28
Inventor 鲍远林
Owner ZTE CORP
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