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）是第五代移动网络（5G）的一个支持技术。MEC通过将计算能力靠近用户，可以实现具有严格延迟要求的服务。与任何新技术一样，MEC的可靠性是需要认真研究的方面之一。本文提出了一个双层模型来计算5G-MEC系统的可用性。之后，我们使用模型来评估不同配置下5G-MEC系统的可用性。结果表明，一个单一的5G-MEC元素冗余可以达到可接受的可用性。要达到高可用性，则需要减少5G和MEC管理元素的软件故障强度。
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