Survivable Service Function Chain Mapping in NFV-Enabled 5G Networks

In this paper, we research the survivable service function chaining (SFC) mapping in network function virtualization (NFV)-enabled 5G networks. Previous SFC mapping studies were conducted on the basis of the assumption of no physical element failure. To tackle this issue, we propose one SFC mapping framework to deal with the single physical node failure. The proposed framework is labeled as Sur-SFC-E. When processing one virtual network service, usually modeled as a SFC, our Sur-SFC-E framework enables to map it successfully in the first place. When one single physical node comes into failure and certain virtual node is running on top of it, our Sur-SFC-E will do the recovery and make the executed service survivable. In order to highlight the Sur-SFC-E advantage, we do the simulation work. The counterpart without considering recovering from the single node failure is selected for performance comparison. We plot and discuss the success ratio and resource utilization results.