The Fifth Generation (5G) of mobile networks offers new and advanced services with stricter requirements. Multi-access Edge Computing (MEC) is a key technology that enables these new services by deploying multiple devices with computing and storage capabilities at the edge of the network, close to end-users. MEC enhances network efficiency by reducing latency, enabling real-time awareness of the local environment, allowing cloud offloading, and reducing traffic congestion. New mission-critical applications require high security and dependability, which are rarely addressed alongside performance. This survey paper fills this gap by presenting 5G MEC's three aspects: security, dependability, and performance. The paper provides an overview of MEC, introduces taxonomy, state-of-the-art, and challenges related to each aspect. Finally, the paper presents the challenges of jointly addressing these three aspects.

翻译：第五代（5G）移动网络提供了具有更严格要求的全新高级服务。多接入边缘计算（MEC）作为关键使能技术，通过在网络边缘（即靠近最终用户处）部署具备计算与存储能力的多种设备，实现了这些新型服务。MEC通过降低延迟、实现本地环境实时感知、支持云端卸载以及缓解流量拥塞，从而提升网络效率。新兴关键任务型应用对高安全性与高可靠性提出了需求，但这两者通常难以与性能同步考量。本综述论文旨在填补这一空白，从安全性、可靠性与性能三个维度对5G MEC进行系统阐述。文章概述了MEC技术，分别介绍了每个维度相关的分类体系、最新研究进展及挑战，最后阐述了协同处理这三个维度所面临的挑战。