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提出基于最小代价的虚拟网络重配置(VNR)方法.定义重配置改善度参数判断VNR机制的效果,以基于最小代价为约束条件选择目标物理节点,将虚拟节点迁移到目标物理节点上,再将虚拟链路映射到应用最短路径方法计算的物理路径,实现虚VNR机制.这种方法可以有效解决“跷跷板”现象(VNR将虚拟节点从物理资源瓶颈节点迁移到目标物理节点,造成目标物理节点成为新的瓶颈节点的现象)造成的VNR开销增大等问题.仿真结果证明了该方法的可行性.
The virtual network reconfiguration (VNR) method based on the minimum cost is proposed.Definition of reconfiguration improvement parameters to judge the effect of VNR mechanism to select the target physical node based on the minimum cost constraints, the virtual node migration to the target physical node, and then The virtual link is mapped to the physical path calculated by applying the shortest path method to implement the virtual VNR mechanism, which can effectively solve the “seesaw” phenomenon (VNR migrates the virtual node from the physical resource bottleneck node to the target physical node, causing the target physical Node becomes a new bottleneck node), the VNR overhead increases, etc. The simulation results prove the feasibility of this method.