Reserch And Performance Verification Of Multi-domain Optical Network Virtualization Algorithm

In recent years,the rapid development of the Internet leads the problem of how to effectively deal with the user's massive data become a huge challenge.Cloud computing and data-center have gradually become the main technical means for processing and storage of users' data,and the interconnection of data-center provides the provision of network for users and the related applications.With the widespread construction of the data center,optical interconnection becomes an inevitable trend,while flex-grid optical network has become an important means of optical interconnection due to its elastic spectrum resources.Optical network virtualization technology has been a powerful tool for optimization of resource allocation in optical network,and has become a hot topic of optical network.This paper focused on the network virtualization algorithm based on spectrum flexible optical network for data center optical interconnection.The development history of multi-domain optical networks and the key issues were fully studied in this paper.The main work and novelty are concluded in follows.First,this paper summarized the characteristics and key issues of multi-domain data center optical networks,including the strategies of node and link resource allocation with the integrated consideration of computation resource of the nodes and the optical-layer resource of the links.Second,three kinds of multi-domain optical network virtualization embedding algorithms are proposed,as random mapping algorithm,load-balancing algorithm and topology aggregation mapping algorithm.The performance of these algorithms are verified via simulations,which based on the successful mapping rate and resource utilization rate,and the topology aggregation mapping algorithm can improve the resource utilization rate by as high as 15.6%than random mapping algorithm.Thirdly,the software-defined optical network experimental platform in 863 project was built where the virtual optical network module was implemented,and the proposed algorithms deployed in this module,the results shown in this paper verified that the time complexity of topology aggregation algorithm is less than load-balancing algorithm.