SDN framework based virtual optical network oriented mapping method

Abstract

The invention discloses an SDN framework based virtual optical network oriented mapping method. The method comprises: step 1: determining a virtual request and network parameters of a physical bottom layer as well as a topologic structure chart, creating a topologic auxiliary chart by taking VON-FP values as weight values of links, and determining an optimization target; step 2: arranging the links on the topologic auxiliary chart in an ascending order according to the VON-FP values, performing classification according to the virtual request, and determining a mapping mode according to a mapping rule; step 3: establishing a framework of a method for population based global search and individual based local heuristic search, and performing solution mapping on classified virtual optical network requests by using the search method; and step 4: repeatedly and iteratively searching for a mapping method to obtain an optimal mapping scheme when a fitness function is minimal, and distributing the scheme to an SDN based NOX framework to perform specific data calculation and traffic forwarding operation. According to the method, the efficiency of multi-domain virtual optical network mapping is improved and the failure rate of the whole network after mapping is reduced.

Description

technical field [0001] The invention belongs to the field of network technology, and in particular relates to a virtual optical network-oriented mapping method based on an SDN architecture. Background technique [0002] With the explosive growth of big data services and cloud-based data applications, network virtualization is increasingly being used to solve network congestion that cannot be solved by traditional network architectures. Among all virtualized network issues, the most concerned is virtual optical network embedding (virtual optical network embedding, VONE). The virtualization of optical network has the advantages of high speed, high bandwidth dynamics, super large capacity and abundant interfaces, while network mapping affects the working efficiency of the entire network. The key issues faced by virtual optical network mapping mainly include: the constraints of optical network transmission, the design and implementation of mapping methods, and the optimization ...

AI Technical Summary

Problems solved by technology

[0004] Since the upper-layer resources in a multi-domain network are allocated to different underlying networks, this will inevitably cause inter-domain opacity, and it is difficult for the controller to coordinate intra-domain and inter-domain transmission, and the existing mapping methods do not fully take into account optical Network constraints and survivability

For example, the consistency and continuity of frequency bands on optical network links must be observed during optical network transmission, and there is a certain failure rate when mapping links

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