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Path computation method and device, PCC, PCE and path computation system

A path calculation technology, applied in the path calculation method, PCC, PCE and path calculation system, device field, can solve the problem that the LSP path calculation problem cannot be solved, and achieve the effect of improving the efficiency of path calculation

Active Publication Date: 2018-07-03
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In RFC5440, when the PCC initiates a path calculation request to the PCE, it only defines the path option carrying one path restriction, which cannot solve the problem of LSP path calculation with multiple path options

Method used

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  • Path computation method and device, PCC, PCE and path computation system
  • Path computation method and device, PCC, PCE and path computation system
  • Path computation method and device, PCC, PCE and path computation system

Examples

Experimental program
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no. 1 example

[0036] like figure 1 As shown, the path calculation method in this embodiment includes the path calculation methods performed on the PCC side and the PCE side respectively.

[0037] Firstly, on the PCC side, the execution process includes: Step S10: Create multiple route calculation requests, and the route calculation requests include corresponding route options. When establishing an MPLS-TE tunnel on the PCC side, multiple path options are provided, and each path option has its own path restrictions, such as nodes that must pass through, nodes that need to be excluded, and so on. Each path calculation request includes a path option, so when creating the path calculation request in this step, it is necessary to create a path calculation request for each path option, therefore, multiple path calculation requests are created.

[0038] Then, step S20 is performed: associating multiple route calculation requests into a group of synchronous route calculation requests, so that the ...

no. 2 example

[0042] like figure 2 As shown, on the basis of the first embodiment, step S30: after sending multiple path calculation requests to the PCE, the path calculation method of this embodiment further includes: Step S40: receiving a group of synchronous path calculation requests corresponding to the PCE The response message includes the route calculation result obtained from the route calculation. The PCE sends back a response message to the PCC for a group of synchronous path calculation requests, where the response message includes the path calculation request for obtaining the path calculation result. Then execute step S50: determine the final route option based on the route calculation result.

[0043] The route calculation result may include a successful route calculation request. Preferably, step S50: determine the final route option based on the route calculation result, which specifically includes: determining a successful route calculation request according to the route c...

no. 3 example

[0045] like image 3 As shown, this embodiment provides a path calculation method. On the PCE side, the execution process includes: Step S60: Receive multiple path calculation requests from the PCC, and the multiple path calculation requests are associated into a group of synchronous path calculation requests ; And, step S70: calculate the route for the route options in the multiple route calculation requests according to the principle of uniqueness of the route calculation result, and obtain the route calculation result.

[0046] Preferably, step S70: calculate the route for the route options in the multiple route calculation requests according to the unique principle of the route calculation result, and obtain the route calculation result, which specifically includes: sequentially calculate the route for the route options in the multiple route calculation requests; If the route calculation is successful for the route option in the current route calculation request, the route...

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Abstract

The invention provides a path computation method, a path computation device, a PCC, a PCE and a path computation system. The path computation method comprises the steps, executed at a PCC side, of: establishing a plurality of path computation requests, wherein the plurality of path computation requests respectively comprises a corresponding path option; associating the plurality of path computation requests to be a group of synchronous path computation requests, so that the PCE can perform path computation on the path options in the plurality of path computation requests according to a path computation result unique principle; and sending the plurality of path computation requests to the PCE. Therefore, the path computation efficiency of the PCE for the plurality of path options is improved.

Description

technical field [0001] The present invention relates to the technical field of communications, in particular to a path calculation method, device, PCC, PCE and a path calculation system. Background technique [0002] In an Internet Protocol (Internet Protocol, abbreviation: IP) / multi-protocol label switching (Multi-Protocol Label Switching, abbreviation: MPLS) network for data communication, two label switching routers (LabelSwitching Router, abbreviation: LSR) can be based on The display path or dynamic path specified by the user generates a transmission path that meets the requirements of bandwidth and other restrictions, and reserves bandwidth resources and assigns labels through the Resource Reservation Protocol (ResourceReservation Protocol, abbreviation: RSVP) on the transmission path, thereby establishing an end-to-end A traffic engineering (Traffic Engineering, abbreviation: TE) tunnel at the end. [0003] A Path Computation Element (PCE for short) refers to an enti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/723H04L12/721H04L45/50
CPCH04L45/12H04L45/50H04L45/42
Inventor 杨美琴
Owner ZTE CORP
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