5G system is characterized by its capability to support a wide range of use cases and services. Supporting accessibility differentiation becomes therefore essential to preserve a stable network condition during high traffic load, while ensuring connection and service quality to prioritized devices and services. In this article, we describe some use cases and requirements that impact the 3GPP design of the 5G accessibility differentiation framework. We then provide an overview of the supported mechanisms for accessibility control in 5G Stand Alone (SA) system, including cell barring and reservation, unified access control, paging control, random access control and admission control. We discuss how these functionalities can be used to maintain the service quality and selectively limit the incoming traffic to the network at high load situations, leveraging different connection-type indicators and connection-priority identifiers.

翻译：5G系统具有支持广泛使用案例和服务的能力,因此,在交通量大的情况下,支持无障碍差异对于保持稳定的网络状况至关重要,同时确保优先设备和服务的连接和服务质量。在本条中,我们描述了影响5G无障碍框架3GP设计的一些使用案例和要求。然后我们概述了5G " 单独站 " (SA)系统支持的无障碍控制机制,包括牢房隔离和保留、统一出入控制、套件控制、随机出入控制和入口控制。我们讨论了如何利用这些功能来维持服务质量,有选择地限制高负荷情况下进入网络的交通,利用不同的连接类型指标和连接优先识别特征。