Adaptive protection level method under double faults of elastic optical network

Abstract

The invention relates to an adaptive protection level method under double faults of an elastic optical network, and belongs to the field of optical communications. The method comprises the following steps: S1, generating a service set, marking the service type, and initializing a network topological resource; S2, dynamically updating a Metrics value of each link in the network, and recording a proportion of spectrum resource usage on the link; S3, calculating K shortest paths for an incoming service, calculating fk(u) and loadk values of the path, and selecting a best transmission route; S4, calculating an available idle spectrum block of the transmission path, matching the available spectrum resources, and recording; S5, according to the current service type, calculating the available protection path and protection resource through an APLA algorithm, and recording the same; and S6, allocating the corresponding spectrum resource through the recorded transmission path and protection path, and returning the related path and resource information. The method in the invention avoids excessive use of resources on some links and can adaptively select protection levels according to different request types and spectrum resource usage states and ensure normal transmission of services under a condition of limited resources.

Description

technical field [0001] The invention relates to the field of optical communication, in particular to the problem of survivability protection under double failure of elastic optical network. Background technique [0002] In recent years, with the development of science and technology and the popularization of the Internet, people's lifestyles are constantly changing. The emergence of new applications such as interactive IP TV, video-on-demand, and cloud services has led to an increasing demand for high bandwidth. Therefore, the annual communication traffic has shown an exponential growth, and it has also promoted the development of optical networks. On the other hand, due to the complexity of the network caused by the scale of the network, the possibility of multiple faults in the optical network is greatly increased, and the research on optical networks with high reliability, high efficiency, and high survivability has received extensive attention. The traditional wavelengt...

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Problems solved by technology

In "Enhanced survivability oftranslucent elastic optical network employing shared protection with fallback[C]. 2017Optical Fiber Communications Conference and Exhibition(OFC), LosAngeles, CA, 2017, pp:1-3." The routing and spectrum sub-regenerator allocation protection algorithm uses the "Fallback" operation to enhance the survivability of dual-link failures, but does not consider the simultaneous failure of the working path and backup path of the service

"Hong Guo, Gangxiang Shen, Sanjay Kumar Bose. Routing and Spectrum Assignment for Dual Failure Path Protected Elastic Optical Networks[J]. IEEE Access, 2016, 4:5143-5160." For the dual failure problem in elastic optical networks, proposed Different hybrid sharing protection algorithms are adopted, without considering the situation of dynamic business

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