Wavelength switched optical network routing method based on universal multi-protocol label switch

A general multi-protocol, label switching technology, applied in the field of wavelength switching optical network routing based on general multi-protocol label switching, to achieve the effect of reducing the average number of key links and reducing the number of key links

Inactive Publication Date: 2015-03-25
XIAN UNIV OF SCI & TECH
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  • Application Information

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Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a method for routing wavelength-switched optical networks

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  • Wavelength switched optical network routing method based on universal multi-protocol label switch
  • Wavelength switched optical network routing method based on universal multi-protocol label switch
  • Wavelength switched optical network routing method based on universal multi-protocol label switch

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[0023] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0024] The application principle of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] like figure 1 As shown, the method for wavelength-switched optical network routing based on general multi-protocol label switching according to the embodiment of the present invention includes the following steps:

[0026] S101: Local matrix A, each network node uses RSVP-TE protocol and Open Shortest Path First Protocol based on Traffic Engineering (OSPF-TE protocol) to store and update the matrix; matrix A includes power flattening of all existin...

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Abstract

The invention discloses a wavelength switched optical network routing method based on universal multi-protocol label switch. A local matrix is introduced to each network node position, comprises power flatness information of all existing optical paths in routing and is stored and dynamically updated through RSVP-TE and OSPF-TE protocols. The matrix is utilized to obtain a path with minimum power flatness, so that the influence on a whole network of the power flatness of a single wavelength division multiplexing link during sudden failure is minimized. The problem caused by the power flatness is reduced, the power flatness possibly influences a survival optical path when the wavelength division multiplexing link fails in a GMPLS based wavelength switched optical network, and the M*M storage matrix exists in each network node and is dynamically updated through the RSVP-TE and OSPF-TE protocols. A simulation result shows that by means of a POSR scheme, the average key link number in the network is effectively decreased, and especially key links are decreased while POSR-0 congestion rate is not improved.

Description

technical field [0001] The invention belongs to the technical field of wavelength-switched optical networks, and in particular relates to a method for wavelength-switched optical network routing based on general multi-protocol label switching. Background technique [0002] Wavelength Switched Optical Networks (WSONs) is proposed with the rapid development of optical devices and optical node technology. It is composed of WDM optical interconnect transparent nodes (such as optical cross-connect, OXCs; )composition. Since WSONs architecture can avoid the use of expensive optical transceivers as intermediate nodes, it is considered to be the most promising next-generation core and metro network technology. [0003] The distributed control WSONs based on General Multi-Protocol Label Switching (GMPLS) can recover the services affected by the fault as soon as possible after the optical network fails. The GMPLS protocol provides routing, signaling and link management functions, so...

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Application Information

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IPC IPC(8): H04Q11/00H04L12/733H04L12/751H04L45/02H04L45/122
Inventor 王斌
Owner XIAN UNIV OF SCI & TECH
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