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Network path calculation method, device and system

A technology of network paths and calculation methods, applied in the network field, can solve the problems of unrecoverable services, failure of path calculation, and low resource utilization of rerouting methods.

Active Publication Date: 2019-08-02
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the resource utilization rate of the prior art rerouting method is low
In some extreme scenarios, for example, there are few available links in the network, and the available links other than the links of the original LSP cannot form the path between the first node and the last node, and the path calculation will fail. , causing the business to fail to recover

Method used

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  • Network path calculation method, device and system
  • Network path calculation method, device and system
  • Network path calculation method, device and system

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Embodiment Construction

[0091]In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0092] The present invention provides a path calculation method supporting sharing strategy, which allows existing links or LSPs to be shared during the path calculation process. The sharing strategy is a strategy for rerouting after a service failure. This strategy allows the reuse of some resources of the service currently affected by the failure...

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Abstract

The embodiment of the invention provides a network path calculation method, device and system, wherein the method comprises the steps that a first node sends a path calculation request to a first pathcalculation unit (PCE), and the path calculation request comprises a shared resource object and a head node and a tail node of a first label switched path (LSP); and the first node receives a path calculation result returned by the first PCE and calculated according to the shared resource object, and establishes a second path from the head node to the tail node according to the path calculation result. According to the network path calculation method, device and system provided by the embodiment of the invention, the utilization rate of the link resources can be improved.

Description

technical field [0001] The present invention relates to network technology, in particular to a network path calculation method, device and system. Background technique [0002] In network technologies, a path computation element (Path Computation Element, PCE for short) is a centralized path computation element, which is mainly used to implement complex path computation. PCE usually has network resource information, including topology, nodes, and current resource usage. The main process of path computation is to return path information to PCC through a routing algorithm and combined with current network available resources after receiving a request from a path computation client (Path Computation Client, PCC for short). In order to enrich the dynamic capabilities of PCE, the IETF standard organization has extended the PCE function to enable it to obtain Label Switched Path (LSP for short), this type of PCE is called stateful PCE (stateful PCE) . In addition, the LSP Deleg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/721H04L12/707H04L12/723H04L12/703H04L45/122H04L45/24H04L45/28H04L45/50
CPCH04L45/44H04L45/22H04L45/28H04L45/50H04L43/087H04L45/20H04L45/70
Inventor 郑好棉张弦林毅
Owner HUAWEI TECH CO LTD