An Enhanced Node Repeatable Virtual Network Embedding Algorithm Based PSO Solution

摘要

The major challenge in network virtualization is the efficient mapping of virtual nodes and links of virtual networks onto substrate network. In this paper we propose ENR-VNE, an algorithm which can achieves high VN request acceptance ratio in the same time. We modeled VNE problem as an optimal problem to minimize the substrate resource utilization degree. Leverage the advantage of ram data switch between virtual machines host on same physical machine instead of using physical link bandwidth, our algorithm allow repeatable node mapping for same VN. Because the initial value of PSO algorithm is crucial, we present an initial position assign method to accelerate convergence and achieve more repeatable features. Simulation results show that our algorithm achieve high acceptance ratio on same substrate network than unrepeatable approach and initial position assign method can further improve the algorithm performance.