Towards Dynamic Bandwidth Management Optimization in VSDN Networks
Yaolin Chai, Guochu Shou, Yaqiong Liu, Yihong Hu, Zhigang Guo · 2017
Software Defined Network (SDN) mixed with Virtual Network (VN) is considered as a future network architecture-Virtual Software Defined Network (VSDN) for enhancing the network planning and the resource usage of networks. However, how to assign VSDN resources to virtual links and virtual network topologies efficiently and on- demand is one of the most challenging problems of any VSDN solution. This paper first proposes a dynamic bandwidth management architecture based on VSDN, and then presents an overall virtual network request scheduling model and finally proposes an optimization algorithm for dynamic bandwidth allocation, namely, K- Shortest Path based on Historical Path Data (HP-KSP). By taking advantage of historical path data and the real-time bandwidth of the physical network links, our HP-KSP algorithm adds a path allocation mechanism to the bandwidth management. Independent of the number of physical nodes, simulation results show that our proposed approach outperforms existing K-Shortest Path (KSP) and K-Shortest Path based on Disjoint Paths (DPKSP) algorithms since our HP-KSP satisfies more virtual requests which are mapped onto the same substrate and has higher QoA (Quality of Algorithms).