Virtual Network Embedding in SDN/NFV based Fiber-Wireless Access Network
Pengchao Han, Lei Guo, Yejun Liu · 2016
Network Virtualization, which allows multiple Virtual Networks (VN) coexisting on a common Substrate Network (SN) with the guarantee of logical independence and security, provides a new solution for the global resource optimization of Fiber-Wireless (FiWi) access network. However, little attention has been paid to the implementation of the customized functions and protocols of VNs. Software-Defined Network (SDN), which changes how networks are managed by providing a logically centralized controller, is a revolution of network and becomes a promising way for the control and management of virtualized FiWi access network. Furthermore, Network Function Virtualization (NFV) has come into view for its ability of providing multiple network functions with low cost. Particularly, Virtual Network Embedding (VNE) is one of the most import issues in network virtualization. Prior works ignore the flexibility of resource reconfiguration of SN. In this paper, the architecture of SDN/NFV based FiWi access network virtualization is proposed. Under the proposed architecture, we further propose a VNE algorithm based on network reconfiguration. Two network reconfiguration operations are exploited and a channel reallocation scheme is proposed to restrict the channel reallocation cost of wireless radio interface. Simulation is implemented to demonstrate the effectiveness of proposed algorithm in increasing the VN acceptance ratio and the revenue of infrastructure provider.