# Fog-Assisted Operational Cost Reduction for Cloud Data Centers

## TL;DR

This paper proposes a fog-assisted load balancing algorithm to reduce operational costs in cloud data centers by leveraging fog devices, minimizing delays and bandwidth costs while considering economic compensation.

## Contribution

It introduces a novel cost-aware load balancing algorithm for fog-cloud systems using PJ-ADMM, addressing the limitations of existing cloud load balancing schemes.

## Key findings

- The proposed algorithm effectively reduces operational costs.
- Simulation results demonstrate improved load distribution.
- The method achieves low computational complexity.

## Abstract

In this paper, we intend to reduce the operational cost of cloud data centers with the help of fog devices, which can avoid the revenue loss due to wide-area network propagation delay and save network bandwidth cost by serving nearby cloud users. Since fog devices may not be owned by a cloud service provider, they should be compensated for serving the requests of cloud users. When taking economical compensation into consideration, the optimal number of requests processed locally by each fog device should be decided. As a result, existing load balancing schemes developed for cloud data centers can not be applied directly and it is very necessary to redesign a cost-ware load balancing algorithm for the fog-cloud system. To achieve the above aim, we first formulate a fog-assisted operational cost minimization problem for the cloud service provider. Then, we design a parallel and distributed load balancing algorithm with low computational complexity based on Proximal Jacobian Alternating Direction Method of Multipliers (PJ-ADMM). Finally, extensive simulation results show the effectiveness of the proposed algorithm.