I. Introduction

II. Overview of MEC Researches

III. MEC with Non-Orthogonal Multiple Access

IV. MEC with Energy Harvesting and Wireless Power Transfer

V. MEC for UAV Communications

VI. MEC for Internet of Things

VII. MEC with Heterogeneous Cloud Radio Access Network

VIII. MEC and Machine Learning

IX. Miscellaneous Researches

X. Conclusion and Discussion