Construction Of Science And Technology Virtual Domain Based On SDN And Controller Deployment Research

With growing demand of science and technology business,in the face of diverse and heterogeneous multi-source data of mass science and technology,under the framework of Software Defined Network(SDN),it is a research hotspot to provide users with the business oriented data virtual domain quickly for the limited underlying physical resources.In order to solve the problem of how SDN can construct virtual set in the underlying network resources,this research is based on HeBei province science and technology big data standardization processing and application system(172110113D)and HeBei province science and technology innovation big data public platform project.The main work of this paper describes as follows:(1)Multi-attribute controller deployment node analysis and selectionThis paper analyzed the external and in-band network mode of SDN,and pointed out the influence of SDN's controller deployment node on network performance.A multi-attribute decision model was constructed based on the reliability of the nodes and the reliability of the nodes,and the optimal controller deployment node was obtained.Compared with method based on network topology centricity,the simulation experimental results showed that multiple attribute choice deployment node effectively reduced the control path transmission delay and the control message routing hop,improved the network performance of SDN.(2)Research on network resource cost-allocation ratio algorithmIn view of the underlying physical resources to take on more virtual domain set up problems,this paper analyzed cost and allocation of the underlying physical resources,as was presented in this virtual network resource mapping data domain cost-allocation algorithm.It is compared with greedy resource algorithm and shortest path algorithm to analyze the application establishment process of virtual domain.The results showed that the network resource cost-allocation ratio algorithm can accept more virtual domain requests,reasonable use of the underlying physical network resources.(3)The construction of science and technology data virtual domainBased on SDN network architecture,the framework of data virtual domain and the establishment process of virtual domain application were proposed.The physical resources at the bottom of SDN were virtualized.The virtual domain slice was constructed,and the virtual network mapping flow space was established to realize the mapping of underlying information and virtual domain information.Finally,the communication of information in virtual domain was realized through simulation platform experiment.At the same time,in order to guarantee the information security in the virtual domain,the information between the virtual domain was isolated.This paper summarizes the work of the whole thesis and further makes clear the future research direction.