QoE Aware Optimal Deployment of Virtual Network Functions in 5G Hybrid Cloud

Virtual Network Functions (VNFs) in the collaboration of edge and cloud servers, i.e., hybrid cloud infrastructure of the 5G Internet are accountable for running codes offloaded from mobile users. Due to the mobility of the users, optimal placement of VNFs in the hybrid cloud infrastructure is a critical issue for getting services in real-time. The two primary design objectives of VNF deployment in hybrid cloud architecture are to minimize service latency (i.e., maximize the quality of experience) and the deployment cost. In this paper, we have formulated the problem as a Multi-objective Integer Linear Programming (MILP) problem that brings a trade-off among these two parameters. The results of performance analysis demonstrate a notable improvement concerning deployment cost and users QoE compared to the state-of-the-art works.