Resilient and Robust QoS-Preserving Post-Fault VNF Placement

In the realm of network management and orchestration, such as Virtual Network Function (VNF) lifecycle management, the dynamicity of 5G networks raises the importance of reliability and robustness when determining optimal VNF placement. Specifically, after a fault has occurred, the set of services that must maintain a certain level of performance and quality depends on the interaction between VNFs. This letter proposes a novel robust optimization model for VNF placement during post-fault status, while addressing the resilience and reliability of the 5G network in testing. The model results are compared with a deterministic placement solution with varying demand uncertainties.