A method and device for establishing a cross-layer path

A method of establishing a path and a technology, which is applied in the field of communication, and can solve the problems that the path to be established cannot be successfully established, and the path to be established cannot meet the bandwidth requirements, etc.

Active Publication Date: 2018-11-30
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Embodiments of the present invention provide a method and device for establishing a cross-layer path to solve the problem in the prior art that the path to be established cannot be successfully established or the established path to be established cannot meet the bandwidth requirement

Method used

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  • A method and device for establishing a cross-layer path
  • A method and device for establishing a cross-layer path
  • A method and device for establishing a cross-layer path

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0115] An embodiment of the present invention provides a method for establishing a cross-layer path, such as figure 1 shown, including:

[0116] S101. The upper-layer PCE determines the upper-layer path information of the LSP to be established, the first node identifier of the lower-layer path, and the last-node identifier of the lower-layer path according to the identifier of the upper-layer head node, the identifier of the upper-layer end node, and the bandwidth requirement of the LSP to be established. .

[0117] Wherein, the upper-layer path information includes the identifier of the upper-layer node that the LSP to be established passes through. The lower-layer path serves as the bottom-layer path of the LSP to be established, and is used to carry upper-layer service data. Bandwidth requirements are used to characterize the bandwidth requirements of upper layer services.

[0118]It should be noted that the LSP to be established is an LSP that meets the above bandwidth ...

Embodiment 2

[0134] An embodiment of the present invention provides a method for establishing a cross-layer path, such as image 3 shown, including:

[0135] S201. The lower-layer PCE receives a path establishment message from the upper-layer PCE.

[0136] Wherein, the path establishment message is used to instruct the head node of the lower layer to establish the lower layer path as the bottom layer path of the LSP to be established, so as to carry the upper layer service data. The path establishment message may include: the identifier of the first node of the lower path, the identifier of the last node of the lower path, and bandwidth requirements.

[0137] Wherein, the first node of the lower layer path is the starting node of the lower layer path of the LSP to be established, and the last node of the lower layer path is the termination node of the lower layer path of the LSP to be established.

[0138] S202. The lower-layer PCE determines whether there is an established lower-layer p...

Embodiment 3

[0146] An embodiment of the present invention provides a method for establishing a cross-layer path, such as Figure 4 shown, including:

[0147] S301. The lower-layer PCE receives a path establishment message from the upper-layer PCE.

[0148] Wherein, the path establishment message is used to instruct the head node of the lower layer to establish the lower layer path as the bottom layer path of the LSP to be established, so as to carry the upper layer service data. The path establishment message may include: the identifier of the lower layer path.

[0149] S302. The lower-layer PCE determines whether there is an established lower-layer path in the lower layer that matches the identifier of the lower-layer path in the path establishment message.

[0150] If there is no established lower-layer path in the lower layer that matches the identifier of the lower-layer path in the above-mentioned path establishment message, execute S303 first, and then execute S304; if there is an...

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Abstract

Disclosed is a method and device for establishing a cross-layer path, which relates to the communication field, and solves the problem of unsuccessful path establishment or path establishment caused by time delay in the prior art from the calculation of the path by the lower layer PCE to the completion of the path establishment process across the upper layer and the lower layer. Unable to meet bandwidth requirements. The specific scheme is: the upper layer PCE determines the upper layer path information of the LSP to be established and the identification of the first and last nodes of the lower layer path according to the identification and bandwidth requirements of the upper layer first and last nodes of the label switched path LSP to be established (S101); acquisition and lower layer The identification of the first and last node of the path and the identification of the established lower layer path matching the bandwidth requirements (S102); sending a path establishment instruction containing the upper layer path information and the identification of the lower layer path to the upper layer head node, so that the upper layer head node according to the upper layer The path information and the identification of the lower layer path establish the LSP to be established (S103). Used in the process of establishing paths across upper and lower layers.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and device for establishing a cross-layer path. Background technique [0002] In order to solve the complex path computation problem in an Automatically Switched Optical Network (ASON), the Internet Engineering Task Force (IETF) proposes a Path Computation Element (PCE). The PCE is a new functional entity responsible for path calculation in the network. The PCE can be integrated inside the network element, or it can be an independent device. [0003] Usually, each network can be configured with a PCE, for example, an Internet Protocol (Internet Protocol, IP) network and an optical network (Optical Network) are respectively configured with a PCE. Wherein, the PCE in the IP network (abbreviated as IP layer PCE) is responsible for path calculation in the IP network, and the PCE in the optical network (abbreviated as optical layer PCE) is in charge of path calculation in t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/715H04L12/751H04L45/50H04L45/02
CPCH04L45/64H04L45/50
Inventor 张弦
Owner HUAWEI TECH CO LTD
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