Joint Cooperative Computation and Interactive Communication for Relay-Assisted Mobile Edge Computing

TL;DR

This paper proposes a hybrid relay protocol for relay-assisted mobile edge computing that balances delay and energy consumption, using a lightweight algorithm for efficient optimization.

Contribution

It introduces a novel hybrid relay forward protocol and an inexact block coordinate descent algorithm for efficient joint computation and communication optimization.

Findings

Faster convergence than existing algorithms

Effective balance between delay and energy consumption

Good overall performance in simulations

Abstract

To realize cooperative computation and communication in a relay mobile edge computing system, we develop a hybrid relay forward protocol, where we seek to balance the execution delay and network energy consumption. The problem is formulated as a nondifferentible optimization problem which is nonconvex with highly coupled constraints. By exploiting the problem structure, we propose a lightweight algorithm based on inexact block coordinate descent method. Our results show that the proposed algorithm exhibits much faster convergence as compared with the popular concave-convex procedure based algorithm, while achieving good performance.