关键词: 虚拟网络映射,双网搜索,资源分配

Abstract: Aiming at the resource allocation problem in virtual network mapping,a mapping model of searching virtual network and substrate network synchronously was proposed in this paper.By using the principle of the prim minimum spanning tree algorithm,the virtual node waiting for being mapped in the virtual network and the right substrate node satisfying the current virtual node in the substrate network are searched simultaneously,so that adjacent nodes in the virtual network are mapped into adjacent nodes in the substrate network in a proper order,at the same time the virtual nodes and their adjacent links are mapped in a harmony way,resulting in that topological property of the virtual network is also kept in the substrate network after being mapped.Simulation results show that the DS-VNM algorithm can reduce the mapping path length of virtual links effectively,and improve ratio of the network revenue and network cost and the acceptance ratio of the virtual network requests,and achieve good performance while allocating network resource.

Key words: Virtual network mapping,Double networks search,Resource allocation