Local 5G networks are emerging as a new form for 5G deployment, targeting service delivery for vertical-specific purposes and other local users. These networks are also known as micro-operator networks for which prior work has established different deployment scenarios, namely Closed, Open and Mixed Networks. To achieve network flexibility, customization and privacy required by various vertical sectors, such as industry, health and energy, it is essential to have a well-defined network slicing architecture and adequate implementation procedure. In this paper, a sophisticated end-to-end network slicing architecture is proposed for different deployment scenarios of the local 5G micro-operator concept. The proposed architecture incorporates a broad four-layer concept, leveraging a multi-tenancy layer for different tenants and their end users, a descriptive service layer, a multi-domain slicing management and orchestration layer, and a resource layer. We further propose a network slice instance (NSI) communication service distribution technique for local 5G micro-operators. This is achieved by expanding/leveraging the communication service management function in the multi-tenant layer into a multi-tenant manager and an orchestrator of communication services. In addition, we describe how the communication service orchestrator will address all the possible multitenant-slice situations during the distribution of a network slice instance to multiple tenants. The novel methods described in the paper present a solution for not only network slice communication service distribution across different micro-operator’s tenants but also for future use cases, especially, when the allocated slice is responsible for multiple tenants or when a tenant requests multiple NSIs.

本地5G网络正在成为5G部署的新形式，其目标是针对垂直特定目的和其他本地用户的服务交付。这些网络也称为微操作员网络，其先前的工作已经建立了不同的部署方案，即封闭，开放和混合网络。为了实现各个垂直领域（例如工业，健康和能源）所需的网络灵活性，自定义和隐私，拥有一个定义明确的网络切片体系结构和适当的实现过程至关重要。在本文中，针对本地5G微运营商概念的不同部署场景，提出了一种复杂的端到端网络切片架构。拟议的架构结合了广泛的四层概念，为不同的租户及其最终用户利用了多租户层，描述性服务层，多域切片管理和协调层以及资源层。我们还为本地5G微型运营商提出了一种网络切片实例（NSI）通信服务分发技术。这是通过将多租户层中的通信服务管理功能扩展/利用为多租户管理器和通信服务协调器来实现的。此外，我们描述了在将网络切片实例分发给多个租户的过程中，通信服务协调器将如何解决所有可能的多租户切片情况。本文描述的新颖方法不仅为跨不同微运营商的租户之间的网络切片通信服务分配提供了一种解决方案，而且还为将来的使用案例提供了解决方案，特别是，