Research On Virtualized Resource Management Technology Of Space-Ground Integrated Network

With the continuous advancement of technology and the rapid development of the Internet,human’s demand for information transmission has increased dramatically,which has greatly promoted the progress of information technology.As the basic platform for information transmission,the network is an important part.In recent years,while many new concepts and technologies have emerged,the network has shown a development trend towards integrated interconnection.One of the important future network forms is called the SpaceGround Integrated Network,which is a comprehensive information network covering different natural spaces of sea,land and air.It aims to effectively combine the resources in different network systems to make a better use of network capabilities and better meet the needs of complex and varied tasks in the future.In such a large and complex network,there exists many problems like diverse resource types,numerous physical devices,and heterogeneous network systems,which will pose a great challenge to accomplish efficient and flexible resources management,but the virtualization technology can be an effective solution due to its extremely strong resource integration capabilities.This paper studies the virtualized resource management technology of the Space-Ground Integrated Network,and mainly carries out the following work:(1)Analyze the development process of the Space-Ground Integrated Network,the virtualization technology and the current network development trends of the world,then clarify the specific research ideas of this thesis: Analyze the specificity of the Space-Ground Integrated Network;Consider how to reasonably use the design ideas and resource management related content of the NFV technology based on virtualization;Consider how to take the advantages of SDN’s centralized and flexible network control ability;Try to find a suitable resource management architecture and an effective resource allocation method that can be applied.Based on these ideas,this thesis first introduces the resource objects in the network from the perspective of management,then divides the virtual resource into 5 types and further explains the virtual resource management process.These contents provide the basis for the resource management framework and method proposed later.(2)For the heterogeneous networks in the Space-Ground Integrated Network,to realize the sharing of network resources and form an organically unified integrated network,the logical architecture must be redesigned.In order to support this design,the key function is network reconfiguration.From the perspective of resource sharing,this thesis introduces the concept of virtualization,programmability and reconfiguration into the design.This thesis proposes a Space-Ground Integrated Network resource sharing architecture based on SDN/NFV,and design a corresponding resource management logical architecture.Finally,two possible physical scenarios are given for supplementary explanation.(3)The architecture provides basic support for resource management,but in the face of the diversity and heterogeneity of resources in the Space-Ground Integrated Network,it is also very necessary to find a suitable model to describe resources,tasks,and resource allocation processes to support research on finding resource allocation solution.This thesis designs a task service-oriented resource management model for the proposed architecture.The model includes three parts: TRS model,layered graph model and end-to-end cross-domain collaborative resource management model.By using this model,the resource topology of different heterogeneous networks can be described as a unified form,and the complex resource allocation solution problem can be converted into a more intuitive and simpler graph theory-based path search problem,and it can make better use of the interconnected resource and centralized coordination ability of the proposed architecture.(4)Based on the proposed resource management architecture and model,at the end of this thesis,a cooperative resource allocation method across multi-domains based on TRS layered graph model called CRAM-AMD is proposed.The thesis models the process of solving the task resource mapping scheme,gives the mathematical representation of the problem and explain the specific steps of the method.Finally,the effectiveness of the proposed algorithm CRAM-AMD is verified by comparing the operation of algorithms under different network scales,different task scales and different network load conditions.