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中文摘要：
在两阶段虚拟网络映射算法的基础上，针对现有的贪婪策略对节点映射存在盲目性的缺点．提出了一种基于临近原则的虚拟网络映射算法。该算法对节点映射阶段做了优化和改进，在节点映射阶段充分考虑其对链路映射带来的影响，使节点映射到相对集中的区域，降低链路映射阶段的求解难度。仿真结果表明，所提出的算法与已有的算法相比，在虚拟网络请求接受率、平均时间收益和收益开销比等方面均有明显提高。
英文摘要：
On the basis of two stages virtual network mapping algorithm, pointing at the defects of the blind node mapping of existing greedy strategy, a virtual network mapping algorithm based on approaching principle was proposed. The algorithm optimized and improved the node mapping stage, and it took a full consideration of the impact on link mapping in the node mapping stage, which made the nodes map to the area of relatively concentrated and reduced the difficulty of solving the link mapping stage. Simulation results show that compared with the existing algorithms, the proposed algorithm improves the virtual network request acceptance ratio, average time revenue and revenue/cost （r/c） ratio.
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