SDN controller in optical network and physical damage perception RSA method

A physical layer damage, optical network technology, applied in the field of optical communication, can solve the problems of reduced resource utilization, occupation of spectrum resources, etc., to achieve the effect of reducing the blocking rate and improving the quality of transmission signals

Active Publication Date: 2016-04-06
HEBEI UNIV OF ENG
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Problems solved by technology

However, this method of avoiding physical layer damage will occupy additional spectrum resources, resulting in reduced resource utilization

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  • SDN controller in optical network and physical damage perception RSA method
  • SDN controller in optical network and physical damage perception RSA method
  • SDN controller in optical network and physical damage perception RSA method

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Embodiment Construction

[0037] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0038] Such as figure 1 As shown, an SDN controller in an optical network of the present invention includes a flow parser, a path calculation module, an impairment assessment module and a traffic engineering database. figure 1 In the shown SDN controller, only the modules related to path calculation and damage assessment are marked, and other basic function modules that are not called are not specifically pointed out. The invention converts various physical layer damages, such as amplified spontaneous emission, crosstalk, polarization mode dispersion, cross-phase modulation, four-wave mixing, etc., into damage models, and constructs a damage evaluation module. And the damage assessment module is introduced into the SDN c...

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Abstract

The invention provides a SDN controller in an optical network and a physical damage perception RSA method and relates to the optical communication technology field. A damage assessment module is introduced into the SDN controller and a Match Fields rule of a flow entry of a SDN controller south bound interface OpenFlow protocol is expanded. The physical damage perception RSA method comprises the following steps that a service request arriving at the optical network is sent to a flow analyzer; the flow analyzer acquires current network state information; a path calculating module calculates K optical paths for the request according to a current network state; the K optical paths are sent to the damage assessment module to carry out physical layer damage assessment, an optical path resource satisfying a QoT requirement is selected and connection is established. In the invention, physical layer damages are comprehensively considered; after routing and a frequency spectrum distribution process are performed for the service, quality determination of signal transmission is performed so that QoT is guaranteed.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to an SDN controller in a software-defined optical network and a physical damage-aware routing and spectrum allocation (RSA) method. Background technique [0002] With the transparent transmission of optical signals in all-optical networks, optical-electrical-optical (OEO) converters gradually withdraw from the core nodes of optical networks. Due to the absence of regenerative devices, irrational devices and equipment in the optical domain, such as optical cross-connectors (OXC), erbium-doped fiber amplifiers (EDFA), etc., produce linear physical damage such as dispersion, noise and power loss, and nonlinear physical damage between signals. The degradation of the optical signal quality by damage will reduce the quality of transmission (QoT) of the optical signal; and this degradation will continue to accumulate along the optical path, eventually leading to an increase ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/721H04L12/733H04Q11/00H04L45/122
CPCH04L45/122H04L45/123H04L45/124H04L45/38H04Q11/0005
Inventor 赵继军王文彦任丹萍胡劲华
Owner HEBEI UNIV OF ENG
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