Availability and Cost aware Multi-'omain Service Deployment Optimization

Network Function Virtualization (NFV) achieves flexible provisioning of network services by using Service Function Chain (SFC) composed of a set of Virtual Network Functions (VNFs). However, complex multi-domain networks pose serious challenges to multi-domain service deployment with availability guarantee. In this paper, we study the availability and cost aware multi-domain service deployment optimization problem. We formulate a multi-objective optimization model with the aim to minimize resource consumption cost and operating cost, while guaranteeing availability by jointly considering VNF failures and server failures, as well as cross-domain deployment operating cost. Then, we design a VNF backup based multi-domain SFC deployment algorithm to reduce resource consumption cost and operating cost. The evaluation results demonstrate that our proposed algorithm can achieve lower resource consumption cost and operating cost than comparison algorithms.