A Reliability-Aware, Delay Guaranteed, and Resource Efficient Placement of Service Function Chains in Softwarized 5G Networks

Network Functions Virtualization (NFV) allows flexibility, scalability, agility, and easy manageability of networks by leveraging the features virtualization cloud computing technologies. However, softwarization network functions imposes many challenges. Reliability latency are major challenges in NFV-enabled 5G that can lead to customer dissatisfaction revenue loss. In general, redundancy is used improve reliability communication services. requires same amount additional resources thus increases cost. this work, we address reliability-aware, delay guaranteed, resource efficient Service Function Chain (SFC) placement problem softwarized networks. First, propose a novel SFC subchaining method enhance an without backups. If requirement not met after method, add backups VNFs meet requirement. Then, formulate reliable as Integer Linear Programming (ILP) order solve it optimally. Owing high computational complexity ILP for solving large input instances, modified stable matching algorithm provide near-optimal solution polynomial time. By extensive simulations show our proposed solutions consume lesser physical compared state-of-the-art provisioning