Research On Multi-scale Network Emulation Technology And Its Application

As is known to all,the network emulation and effect evaluation platform is a strong support for the verification of new network technology and the evaluation of network security technology.Network replication is an important part of network emulation and effect evaluation platform,whose main objective is to construct the required emulation network.The key problem of constructing emulation network is how to ensure the fidelity and scalability of emulation.In recent years,there are mainly two ways to solve that problem with the network emulation technology: one is to use a single network emulation technique,such as virtualization technology or digital emulation technology,and then focus on how to improve the performance of the technology used;The other one is to combine virtualization technology with digital simulation technology considering their respective advantages.For example,virtualization technology has advantages in terms of fidelity,while digital simulation technology has advantages in scale.This paper is adopted in the second way,mainly from the aspects of the seamless fusion of the virtualization technology and the digital emulation technology and performance improvement of the technology used.The main research contents are as follows:1)This paper presents a multi-scale network replication technology for the fusion of virtualization and digital simulation.Based on the fidelity and scalability requirements of the network replication,a multi-scale network replication technology for the fusion of virtualization and digital simulation based on cloud platform is proposed.Firstly,the architecture of this technology is described,and then the concrete process of constructing multi-scale fusion emulation system is introduced in detail,and the interactive communication of the system for the fusion of full virtualization,lightweight virtualization and digital simulation as well as the flexible access and scale expansion of the emulation network are realized.Extensive experiments showed that emulation network which was built with the network construction technology for the fusion of full virtualization,lightweight virtualization and digital simulation had the characteristics of flexibility,transparency,concurrency,scalability.The technology can support the creation of large-scale and realistic emulation networks.2)Based on the research content in 1),the paper further proposes a multi-scale network task dividing method for the fusion of virtualization and digital simulation to improve the performance of fusional network replication technology.Main idea of this method is that based on the architecture of the network emulation for the fusion of virtualization and digital simulation,taking into account advantages of virtualization and digital simulation,divide the emulation network topology into virtualization topology area and digital simulation topology area,and then aiming at load balancing and remote traffic Minimizing,divide these two topology areas with the considering of given physical resources.Extensive experiments show that the dividing method can effectively divide the network emulation task for the fusion of virtualization and digital simulation.Compared with the random algorithm and the uniform load balancing algorithm,the remote traffic is reduced by 33.7% and 25.1% averagely,and the degree of load balancing is improved by 56.7%,34.5% averagely.Therefore,this method can effectively improve the performance of network emulation.3)Based on the research contents in 1)and 2),this chapter focuses on the application of network emulation technology in network security testing verification and computer network teaching experiment.The experiments show that multi-scale network replication technology can effectively construct network protocol analysis experiment,network attack experiment and computer network emulation teaching experiment scene.