Virtualization Method Of WLAN Wireless Network Resource

Wireless network virtualization is an effective way to solve the rigid problem of wireless network architecture.Wireless network virtualization aims to build a fully virtualized wireless network environment,through the abstraction,distribution and other mechanisms in the public wireless network infrastructure to build a coexistence but isolated virtual network.Therefore,the research and implementation of network virtualization method has important practical significance.Firstly,based on the existing experimental platform of SDR,the paper studies the method of wireless access network virtualization method and designs a access network virtualization method method to deploy multiple virtual networks in a physical network.With this method,the paper deploy multiple virtual networks in a physical network.On the existing experimental platform,the feasibility of the method has been realised and verified.The experimental results show that wireless access network virtualization method enables to deploy multiple virtual networks in the physical network,and each virtual network can manage network and users in it independently.Secondly,in order to solve the problem of isolation of different virtual networks and better management of physical network resources,the paper has carried out the research on the method of network resource virtualization on the basis of deploying multiple virtual networks in the physical network.In order to realize the abstraction of the physical network resources,the concept of the network time slice were put forward,and the physical network resources are divided into multiple network time slices,which realize the abstraction of the physical network resources.According to the different requirements of users,the paper has designed two resource allocation algorithms and simulated the queuing delay of the virtual network service.When the physical resources is allocated by the two resource allocation algorithms,the simulation results show that the more uniform of the network time slices of the virtual network,the smaller the queuing time of the virtual network data service and the queuing delay of the virtual network data service increases with the increase of the number of virtual networks.With the existing experimental platform,the paper realizes the method of network resource virtualization.Experiments show that the method of the wireless network resource virtualization can effectively manage the physical network resources,achieving the goal of on-demand distribution of network resources.Finally,in the environment of wireless network virtualization,in order to improve the performance of data transmission between the users in the virtual network,the network throughput of the virtual network,this paper has proposed that the virtual network supports both the original AP relay transmission mode and the D2 D transmission mode.When users transmit data in the virtual network,AP will select one of the two transmission modes for users,which owns better transmission quality.The simulation results show that the method of virtual network D2 D transmission assistance can effectively improve the throughput of the whole of virtual network,reduce the load of the virtual AP and improve the performance of data transmission between users of the virtual network.