QoS-aware Delivery of VoIP Service through Dynamic Service Function Chaining in 5G Networks

Service Function Chaining (SFC) processes the traffic of services through an ordered list of Service Functions (SFs). Current SFC model is based on two emerging technologies; Software Defined Networking (SDN) and Network Function Virtualisation (NFV) that provide fast and cost efficient deployment and removal of SFC in 5G Networks. The SFs may be overloaded during runtime, resulting in congestion or dropping of packets that consequently affects the QoS performance of real-time services such as Voice over IP (VoIP). This paper investigates the feasibility of our scalable SFC orchestration framework in meeting the QoS requirements of VoIP users in 5G mobile networks. The results show that our framework provides an enhancement in the overall network QoS performance without wasting the infrastructure resources.