Efficient virtual optical network survivability mapping method for service reliability

Abstract

The invention relates to an efficient virtual optical network survivability mapping method for service reliability, and belongs to the technical field of optical communication. According to the method, during virtual node mapping, a physical node weight evaluation criterion comprehensively considering physical node attributes is designed, and virtual nodes with large weight values are sequentiallymapped to physical nodes with large weight values; during virtual link mapping, a working optical path selection strategy considering idle spectrum resources and optical path reliability is designed,and a protection optical path selection strategy for improving protection optical path reliability and protection bandwidth sharing degree is designed; and meanwhile, a frequency spectrum partitioning method is introduced, a working light path frequency spectrum allocation method based on frequency spectrum integration factor perception is designed, and when frequency spectrum blocks are allocated to the working light path, the frequency spectrum blocks enabling frequency spectrum resources of a physical light path and adjacent links to be more integrated are selected. The method provided bythe invention can effectively improve the request acceptance rate of the virtual optical network and reduce the bandwidth blocking rate.

Description

technical field [0001] The invention belongs to the technical field of optical communication, and relates to a service reliability-oriented high-efficiency virtual optical network survivability mapping method. Background technique [0002] With the continuous emergence of various high-bandwidth and low-latency emerging services such as live video, telemedicine, and smart cities, the network business volume has increased rapidly, and people's demands for network services have become more diversified. Due to the limitation of physical factors, it is difficult to meet the development requirements of future transmission network. Compared with WDM networks, Elastic Optical Networks (EONs) can divide the optical spectrum into finer-grained frequency slots, and can flexibly allocate spectrum resources according to the needs of differentiated services. Intelligent optical network with development potential. [0003] However, the achievable capacity of EONs based on single-mode sin...

AI Technical Summary

Problems solved by technology

Therefore, introducing network virtualization technology into SDM-EONs can further improve network transmission capacity and spectrum utilization, but the combination of SDM-EONs and this technology will also cause some problems, the most prominent problem is virtual optical network mapping

In addition, the probability of multi-link failures in optical fiber links is increasing year by year, which brings huge economic losses to operators and users

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