# Energy-Efficient Joint Offloading and Wireless Resource Allocation Strategy in Multi-MEC Server Systems

## TL;DR

This paper proposes a joint offloading and wireless resource allocation strategy for multi-MEC server systems to minimize energy consumption and improve offloading success, using a bi-level optimization approach.

## Contribution

It introduces a novel joint optimization framework for offloading and resource allocation in multi-MEC systems, addressing the NP-hard problem with a bi-level approach.

## Key findings

- Significant energy savings demonstrated in simulations.
- Improved successful offloading probability compared to conventional schemes.
- Effective handling of latency-critical applications.

## Abstract

Mobile edge computing (MEC) is an emerging paradigm that mobile devices can offload the computation-intensive or latency-critical tasks to the nearby MEC servers, so as to save energy and extend battery life. Unlike the cloud server, MEC server is a small-scale data center deployed at a wireless access point, thus it is highly sensitive to both radio and computing resource. In this paper, we consider an Orthogonal Frequency-Division Multiplexing Access (OFDMA) based multi-user and multi-MEC-server system, where the task offloading strategies and wireless resources allocation are jointly investigated. Aiming at minimizing the total energy consumption, we propose the joint offloading and resource allocation strategy for latency-critical applications. Through the bi-level optimization approach, the original NP-hard problem is decoupled into the lower-level problem seeking for the allocation of power and subcarrier and the upper-level task offloading problem. Simulation results show that the proposed algorithm achieves excellent performance in energy saving and successful offloading probability (SOP) in comparison with conventional schemes.