A user priority-based virtual network embedding model and its implementation

Existing virtual network embedding models failed to fully consider the restrictions on physical network resources, the importance of virtual network (VN) requests and load balance. In this paper, a virtual network embedding model based on the user priority is proposed. Compared with the low priority users, the high priority users can get more extra resources. Besides, the model has the characteristic of load balance which can avoid the appearance of the bottleneck resources. What´s more, the ant colony algorithm is used to solve this new virtual network embedding model. Finally, the simulation results demonstrate the superiority of the proposed model from the aspects of the VN request acceptance ratio, and the physical resource utilization.