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Grading early warning protection method in frequency variable network

A protection algorithm and spectrum technology, applied in the network field, can solve problems such as wasting time and link resources, achieve good OSNR value fluctuations, increase resource utilization, and reduce protection switching actions

Active Publication Date: 2014-06-25
BEIJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
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Problems solved by technology

But the main defect of the former is that it wastes link resources, while the main defect of the latter is that it wastes a lot of time

Method used

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  • Grading early warning protection method in frequency variable network
  • Grading early warning protection method in frequency variable network
  • Grading early warning protection method in frequency variable network

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Embodiment Construction

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0032] see figure 1 , the embodiment of the present invention provides a hierarchical early warning and protection method in a spectrum variable network, the method is suitable for elastic optical networks with full spectrum conversion capability, and the steps of the method are as follows:

[0033] Step 101: When it is detected that the ONSR value of a link in the network has dropped to the set protection resource reservation threshold, add the ...

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Abstract

The invention provides a grading early warning protection method in a frequency spectrum variable network, comprising steps of selecting a previous hop node and a next-hop node of two terminal nodes of a damaged link in a route the business of which has a corresponding modulation format when an OSNR value in the link reaches a protection resource reserved threshold, and performing redistribution and calculation of the paths and frequency slots by utilizing an optimal frequency variable protection algorithm. When the OSNR value reaches a protection switching triggering threshold, the corresponding modulation format is adopted and the business which was successfully reserved is switched to the paths and the frequency slots which were computed. If the OSNR value rebounds to a level above the resource reservation triggering threshold, the protection resource reserved by the business adopting the modulation format is released. The invention can provide hierarchical rerouting and a recovery strategy for non-continuity frequency spectrum distribution to the link failure in a wavelength changeable elastic network.

Description

technical field [0001] The invention relates to the field of network technology, in particular to a hierarchical early warning and protection method in a frequency spectrum variable network. Background technique [0002] With the rapid growth of Internet traffic and the rapid rise of high-bandwidth services, people pay more and more attention to the quality of communication and network survivability. Since the transmission capacity carried by each wavelength is as high as several bits per second, network failures will lead to A large number of services are interrupted, which also makes the problem of network invulnerability more urgent and prominent. In recent years, the rise of gridless switching and elastic optical switching technologies has greatly improved spectrum transmission efficiency and network flexibility, providing a more efficient service transmission that supports various rates and modulation formats. Its flexible spectrum resource scheduling capability provid...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/703H04L45/28
Inventor 张民武佳慧王丹石黄善国
Owner BEIJING UNIV OF POSTS & TELECOMM
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