Routing method and apparatus thereof
A routing and link technology, applied in the field of communication, can solve the problems of poor simulation accuracy and normal reception of services, and achieve the effect of improving accuracy and low cost
Active Publication Date: 2014-03-05
HUAWEI TECH CO LTD
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Problems solved by technology
[0004] In the course of realizing the present invention, the inventor finds that there are at least the following problems in the prior art: the prior art WDM ASON fault simulation method can perform approximate simulation on a network with short transmission distance, small capacity, and service signal quality, but The mainstream application scenarios of WDM networks are long-line large-capacity transmission. The signal degradation introduced by long-line transmission and optical amplifiers often leads to services that cannot be received normally on reachable optical channels. If this method is still used for simulation in this scenario, the simulation The accuracy is relatively poor
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[0017] 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, not all, embodiments of the present invention. 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.
[0018] In the embodiments of the present invention, the impact of link attribute parameters on service reception is considered in WDM optical layer simulation, so as to improve the accuracy of WDM ASON fault simulation. Firstly, the resource carrying the wavelength service in the network is abstracted as a link, so as to collect statistics on the attribute parameters of the link. The wavelength division optical path is divided into two types: main optical path...
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Embodiments of the invention provide a routing method and an apparatus thereof. The method comprises the following steps: calculating a first reachable route of a wavelength service; acquiring a link attribute parameter in the first reachable route, wherein the link attribute parameter comprises a light amplifier parameter list and a OSNR threshold; calculating a first loss OSNR value of the first reachable route by using the light amplifier parameter list and calculating an end-to-end first OSNR value of the wavelength service; comparing the end-to-end first OSNR value of the wavelength service with the OSNR threshold, simulating and opening the wavelength service on the calculated first reachable route if the end-to-end first OSNR value of the wavelength service is greater than or equals to the OSNR threshold. The embodiments of the invention are mainly used for raising accuracy of wavelength division multiplexing (WDM) automatically switched optical network (ASON) fault simulation during wavelength-division-network long-line high-capacity transmission.
Description
technical field [0001] The present invention relates to the technical field of communication, in particular to a routing selection method and device. Background technique [0002] In the WDM (Wavelength Division Multiplexing, wavelength division multiplexing) optical layer ASON (Automatically Switched Optical Network, automatic switching optical network) equipment network, whether the WDM optical layer intelligent service can be transmitted on other lines through the intelligent protocol when a line failure occurs. Resumption of transmission is affected by the following technical factors: a. Wavelength scheduling capability of optical layer WDM ASON equipment and optical line resources: This factor determines whether there is still an optical channel that can make the service optical signal reachable between the source and sink after a line failure occurs in the intelligent service ; b. Optical parameters: The optical signal will be damaged through multiplexing / demultiplexin...
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IPC IPC(8): H04L12/70H04B10/07H04B10/25H04Q11/00
Inventor 王枫邹戬许建新
Owner HUAWEI TECH CO LTD