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A method and system for restoring optical layer services

A business and strip light technology, applied in the field of optical communication, can solve problems such as no solution

Inactive Publication Date: 2020-02-14
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there is no way to solve the priority preemption of LSP restoration at the optical layer

Method used

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  • A method and system for restoring optical layer services
  • A method and system for restoring optical layer services
  • A method and system for restoring optical layer services

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Embodiment Construction

[0075] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0076] The calculation of the optical layer path can be divided into path calculation and wavelength allocation. The intra-node link can be abstracted for specific devices, and the connectivity relationship between the optical data unit (Optical Data Unit k, ODUk) layer and the optical channel (Optical Channel, OCh) layer is abstracted as an intra-node link. Based on this idea, the wavelength occupancy information of optical layer links can be flooded according to 0-7 priorities, and at the same time, the occupancy status information of the wavelengths of the abstract interna...

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Abstract

The invention discloses a method for restoring optical layer services, which is applied to a node and includes: determining the wavelength resource occupancy information of the internal link of the node and the optical layer link where the node is located; the wavelength resource occupancy information includes: the wavelength resource corresponds to the maintenance Priority resource occupation status information; flood the wavelength resource occupation information in the network where the node is located. The invention also discloses a method for restoring optical layer services, which is applied to the routing calculation unit, including: when the service needs to be restored, determine the restoration LSP for restoring the business; obtain the internal link and the optical layer link of each node on the restoration LSP wavelength resource occupancy information; according to the wavelength resource occupancy information, preempt the wavelength resources on the recovery LSP; after preempting the wavelength resources that meet the path connectivity requirements, notify each node on the recovery path LSP to be the Allocate resources for the recovery business described above. The invention can realize the recovery priority preemption of the optical layer service.

Description

technical field [0001] The present invention relates to the technical field of optical communication, in particular to a method and system for restoring optical layer services. Background technique [0002] In ASON (Automatically Switched Optical Network, automatic optical network), for the establishment of transmission service LSP (Label Switched Path, Label Switching Path), it is necessary to use the path calculation algorithm CSPF (Constrained Shortest Path First, constraint-based shortest path first) based on the existing The network topology resource to calculate. During path calculation, the routing calculation unit is the routing calculation unit RC (Routing Controller) built in the node or the routing calculation unit PCE (Path Computation Element, path calculation unit) outside the node. The routing calculation unit is generally based on the first The principle of come first count, that is, the LSP service initiated and established first needs to occupy the optimal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/24H04L45/28H04L45/50H04L47/724
CPCH04L45/28H04L45/62H04L45/50H04L47/724H04B10/27H04J14/0227
Inventor 卢刚
Owner ZTE CORP
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