Aiming at load imbalance problem in the substrate network,the substrate nodes and links with resource utilization exceed the predefined threshold value were selected for reconfiguration based on the load state of the substrate nodes and links.By using topology awareness reconfiguration model,the virtual node to be migrated was then mapped onto the nearest mapped substrate node,which is the neighbor mapping node of the migration virtual node,mapping location of these reconfiguration virtual nodes in the substrate network was optimized,therefore resource consumption of virtual network reconfiguration was reduced efficiently.Simulation results showed that the load level in the substrate is balanced efficiently,the reconfiguration path distance of virtual links are reduced greatly,and the accept ratio of virtual networks is improved by using the proposed TA-VNR algorithm.
