FlexArch: Flexible Controller Placement Architecture for Hypervisor Assisted vSDN-enabled 5G Networks

The next-Generation wireless network revolution (e.g. 5G & Beyond) is primarily focusing on mitigating the end-user demands that possess random and uncertain characteristics. The TNOs (Telecommunication Network Operators) are looking to provide optimum QoNS (Quality of Network Services) in URLL (Ultra-Reliable Low Latency) environment. The Hypervisor assisted vSDN (virtualized Software Defined Network) is one of the key technology enablers that envisions a flexible and realistic network topology to fulfill the never-ending user demands. Identifying the potential positions of Controllers and Hypervisors inside such a dynamic networking environment is a challenging task. So, in this work, we have proposed a MILP based Joint HPP-CPP (Hypervisor Placement Problem & Controller Placement Problem) that considers different network latency matrices and gives the best geographical arrangements depending upon user load and latency thresholds for real network topology. Our dynamic network framework utilizes a Greedy algorithmic approach that quantifies the parametric values when they have been used as objectives. The simulation result validates our proposed approach, and this approach can be applied in other similar types of critical and dynamic localization problems.