Multi-access Edge Computing (MEC) is one of the enabling technologies of the fifth generation (5G) of mobile networks. MEC enables services with strict latency requirements by bringing computing capabilities close to the users. As with any new technology, the dependability of MEC is one of the aspects that need to be carefully studied. In this paper, we propose a two-level model to compute the availability of a 5G-MEC system. We then use the model to evaluate the availability of a 5G-MEC system under various configurations. The results show that having a single redundancy of the 5G-MEC elements leads an acceptable availability. To reach a high availability, the software failure intensity of the management elements of 5G and MEC should be reduced.

翻译：多接入边缘计算（MEC）是第五代（5G）移动网络的使能技术之一。MEC通过将计算能力靠近用户部署，能够支持具有严格时延要求的服务。与任何新技术一样，MEC的可靠性是需要深入研究的重要方面之一。本文提出了一种用于计算5G-MEC系统可用性的两层模型，并利用该模型评估了不同配置下5G-MEC系统的可用性。结果表明，5G-MEC元素单重冗余即可实现可接受的可用性。为达到高可用性，需降低5G与MEC管理元素的软件故障强度。