Cross-Layer Resource Allocation in Wireless-Enabled NFV

In this letter, we propose a cross layer resource optimization model and solution to wireless enabled SFC network. Particularly, we aim to minimize end-to-end downlink latency including both wireless and wired delay by optimizing VNF placement, routing path and wireless resources in terms of resource block for each SFC. We formulate the problem into a non-linear non-convex integer optimization problem and propose a heuristic method HCLRA to solve the problem. The simulation results show that the latency performance of the proposed heuristic algorithm HCLRA is close to optimal and better than a suboptimal genetic algorithm.