The Application And Improvement Of Virtual Network Embedding Algorithm In Network Virtualization Under SDN Environment

Virtual Network Embedding shorted as VNE which means mapping virtual networks meeting several node and link constraints to physical network is the key part of network virtualization.By now,there have been many research results about VNE algorithm.But most of them stay at the theoretical level,i.e.allocation of network resources,and are far from engineering practice.Combined with practice,we improve in two ways,virtual network ID and the algorithm itself.On the one hand,virtual network ID is taken into account while conducting VNE,which means allocating it to each link as a unit.On the other hand,virtual network evaluation model is enhanced to promise long-term performance on the basis of feasibility.Through these two ways,we present a new VNE scheme close to the practice and convenient to deploy.In the article,network virtualization slice and VNE algorithms are briefly discussed at first.Next,the improvement of VNE algorithm and optimization of long-term performance form the whole improvement scheme.Then,the design and realization of simulation platform will be introduced.At end,simulation results are analyzed.Both theoretical and test results display the superiority of this new VNE Algorithm.