基于网络资源相关性的虚拟网络映射算法

针对网络虚拟化环境中资源利用率较低的问题，通过建立资源相关性度量模型，刻画虚拟节点和物理顶点之间的匹配程度，根据虚拟节点和物理顶点之间的资源相关性，将虚拟节点映射到资源相关性较强的物理顶点上；为了降低虚拟链路的映射路径长度，通过建立节点间邻接关系模型，将相邻的虚拟节点映射到邻接的物理顶点上。实验结果表明，提出的虚拟网络映射算法均衡了物理网络资源的分布状态，降低了虚拟网络映射的资源代价，提高了虚拟网络请求接受率。

Network resource correlation-aware virtual network mapping algorithm

Aiming at the problem of low resource utilization in network virtualization environment, this paper proposed a resource correlation measurement model for measuring the fitness degree between virtual node and substrate vertex, then it mapped virtual node to substrate vertex having strong resource correlation value, which was the resource correlation between virtual node and substrate vertex. In order to reduce the mapping path length of virtual links, it mapped the adjacent virtual node to the adjacent substrate vertex by using the adjacency relationship model between nodes. Experimental results show that the distribution of substrate network resource is balanced, the resource cost of virtual network mapping is reduced, and the acceptance rate of virtual network requests is improved effectively by using the proposed virtual network mapping algorithm.