A sdn controller in optical network and rsa method for physical damage awareness

A physical layer damage and optical network technology, applied in the field of optical communication, can solve the problems of reduced resource utilization and occupied spectrum resources, so as to reduce the blocking rate and improve the quality of transmission signals

Active Publication Date: 2018-05-08
HEBEI UNIV OF ENG
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  • Application Information

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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

Method used

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  • A sdn controller in optical network and rsa method for physical damage awareness
  • A sdn controller in optical network and rsa method for physical damage awareness
  • A sdn controller in optical network and rsa method for physical damage awareness

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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 an SDN controller in an optical network and an RSA method for sensing physical damage, and relates to the technical field of optical communication. The SDN controller of the present invention introduces the damage assessment module into the SDN controller, and extends the Match Fields rule of the flow entry of the OpenFlow protocol of the southbound interface of the SDN controller; the RSA method of physical damage perception of the present invention includes the following steps : Send the service request reaching the optical network to the stream analyzer, and the stream analyzer obtains the current network status information; the path calculation module calculates K optical paths for the request according to the current network status; sends the K optical paths to the damage assessment module for physical layer processing Damage assessment, select optical path resources that meet QoT requirements, and establish connections. The present invention comprehensively considers the damage of the physical layer, and after the routing and spectrum allocation process is performed for the service, the quality judgment of the transmission signal is performed, and the 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 Patents(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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