QoS-aware Controller and Hypervisor Placement in vSDN-enabled 5G Networks for Time-critical Applications

摘要

The massive growth of IoT devices and the need for digitization drive future wireless communication technologies intensively. The end-users are always demanding all kinds of network services including the time-critical and mission-critical ones. The Quality of Network Services (QoNS) of the future 5G and 6G networks are aiming to address all possible types of flexible user demands optimally. Telecom. Service Providers (TSPs) are rigorously looking for suitable network architectures that can assist them to realize such user-friendly systems. vSDN or virtualized Software Defined Network Architecture is the key technology enabler that makes such functionalities possible. In the recent paradigm shift where everything is being based on IoT, service availability and system stability are two major concerns. For keeping the quality index of the network services high, it is essential to orchestrate and deploy the network infrastructures that will provide additional and upgraded network services. Keeping these fundamental issues in mind, in this work, we have proposed a novel multi-instance deployment strategy for Controllers and Hypervisors over an actual network topology. While defining the work, our prime concern targets improving service availability within the ULL (Ultra-Low Latency) environment. Thus, we have developed a Multi-Objective Mixed Integer Linear Programming (MILP) problem for optimally placing the hypervisors and controllers over the network topology to minimize the H-plane service agreements along with propagation latency of network function demands. After analyzing the results, it can be claimed that our approach has a significant impact in improving the QoS of network parameters. The proposed model can be applied in similar time-critical relocation problems associated with UAV-assisted networks depending upon various application domains.