Dual Load Balancing Strategy for Virtual Network Embedding in SDN-Enabled Distributed Cloud

Virtual Network Embedding (VNE) has been acknowledged as an essential task in a functional cloud environment. Derived from the Network Virtualization (NV) concept, the VNE process involves assigning virtual resources from a given Virtual Network (VN) into the fittest physical resources from a substrate network. The integration of software-defined networking (SDN) technologies in the cloud are becoming a driven practise due to its centralized design that allows advanced resource management via several cloud policies. In this paper, we propose a systematic VNE policy based on a two-staged Load Balancing (LB) plan. Our approach covers firstly the Virtual Network Requests (VNRs) assignment onto multiple Data Center Networks (DCNs). Then, the servers in each DCN are classified in which they host the most compatible virtual resources. The effectiveness of our approach is finally validated by a set of numerical experiments.