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
CN105763348BInactive Publication Date: 2020-02-14ZTE CORP
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
ZTE CORP
Publication Date
2020-02-14
Estimated Expiration
Not applicable ยท inactive patent

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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.
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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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