Research On Virtual Network Mapping In Wireless Multi-hop Network

With the rapid development of mobile Internet,various new businesses also emerge in an endless stream,the next generation access network facing the main challenge is how to provide basic services to ensure the normal condition,the potential demand of deep mining users,so as to accelerate the development of the different needs of the customized network services.The multi hop relay cellular network improves the coverage of the base station,improves the quality of the channel,increases the capacity of the network,and improves the transmission rate of information in the network at a low cost.Network virtualization can build different virtual networks on the public physical network to provide services.Virtual network is the slice of physical network resources,and each virtual network can customize its own protocols,routing rules,services and control schemes.The fusion of network virtualization technology to the network of the next generation access network,access network can solve the facing cost rate is low,the poor quality of service,resource utilization,at the same time also can realize the next generation access network needs diversification,such as easy management,high performance,full service,and fusion can accelerate the completion of heterogeneous network.In this paper,the virtual network mapping model is analyzed,and then a virtual network mapping algorithm VNEA-EC algorithm,which considers the power and bandwidth resources,is designed.In the proposed algorithm we mainly focus on the link interference between adjacent link power resources,link node bandwidth,geographical restrictions and wireless network,and then based on the definition of residual physical resource resources per unit cost,to minimize the virtual network mapping cost as the objective function,and the application of link partitioning to achieve load equilibrium.This allows the acceptance rate of network requests and the utilization of physical resources,and has a lower mapping cost.In addition,this paper studies the scenarios of wireless multi hop cellular network.In order to solve the problem of quality assurance and heterogeneous network convergence,a virtual network mapping algorithm based on multi commodity flow is proposed,which is mapped according to the requests of nodes in the network.Considering the network nodes and links in the resources allocation of resources,the mapping process for the virtual network planning path can be more reasonable and more efficient resources,while retaining more physical resources in the key position of the network,to receive more requests for virtual network mapping.