Research On Virtualization Mapping Technology In Elastic Optical Networks

With the development of the industry and information technology,network virtualization technology is considered to be one of the key technologies in the future network.Its high resource utilization and characteristic of supporting network heterogeneity bring highly efficient and reliable services to customers.And elastic optical network not only has the huge bandwidth in traditional optical network,but also has the characteristic of flexible spectrum.These all make the elastic optical network virtualization technology have very important and practical significance.Because in the process of elastic optical network virtualization,we need to provide the required network resources for upper users'service requests,the virtualization mapping technology in elastic optical network becomes the key technology in the whole process.In this situation,how to research an effective virtualization mapping technology in elastic optical network is particularly important.This paper has investigated the existing virtualization mapping algorithms in elastic optical network.After analyzing the defects and problems of the existing mapping algorithms,two more efficient mapping algorithms are proposed.First,this paper proposes a virtualization mapping algorithm based on optical node optimization in elastic optical network.In the node mapping stage,the existing mapping algorithms consider either the constraints of node location or the constraints of node computing resource.These algorithms all avoid the constraints of peculiar attribute of the optical node in elastic optical network.Therefore,this algorithm takes the switching capacity of optical node into consideration,and provides good constraints for the effective switching of information.This algorithm truly realizes virtualization mapping technology in elastic optical network.Second,this paper proposes a virtualization mapping algorithm based on the minimum loss of fragmentation degree in elastic optical network.This algorithm proposes the concept of "fragmentation degree",which is based on the unique characteristic of frequency slot in elastic optical network.Besides,this algorithm focuses on the resource utilization in the underlying elastic optical network in order to avoid fragmentation of the underlying link resource.So the success rate of mapping can increase greatly.Finally,this paper uses VS2010 simulation software to set the simulation environment and write the simulation modules.Comparing with the performance of basic mapping algorithm,this paper confirms the superiority and efficiency of this mapping algorithm.