Network slicing is considered to be one of the key enablers to Fifth Generation (5G) communication system. Legacy telecommunication networks have been providing various services to all kinds of customers through a single network infrastructure. In contrast, with the deployment of network slicing, operators are now able to partition entire network into different slices, each with its own configuration and Quality of Service (QoS) requirements. There are many applications across industry, each needs an independent slice with its own functions and features. All these applications open new business opportunities, which require new business models and therefore every single slice needs an individual Service Level Agreement (SLA). In this paper, we proposed a comprehensive end-to-end structure of SLA between tenant and service provider of slice-based 5G network, which balances the interests of both sides. The proposed SLA is expected to define reliability, availability, and performance of delivered telecommunication services in order to ensure that right information gets to the right destination at right time, safely and securely. We also discussed the metrics of slice-based network SLA such as throughput, penalty, cost, revenue, profit, and QoS related metrics, which we think are very critical to be considered during the agreement.

翻译：网络切片被视为第五代（5G）通信系统的关键使能技术之一。传统的电信网络一直通过单一网络基础设施为各类客户提供多样化服务。相比之下，随着网络切片的部署，运营商现在能够将整个网络划分为不同的切片，每个切片都有其独立的配置和服务质量（QoS）要求。各行业存在众多应用场景，每个场景都需要具备独立功能与特性的专属切片。这些应用开辟了新的商业机遇，要求建立新型商业模式，因此每个独立切片都需要专门的服务等级协议（SLA）。本文提出了一种基于切片的5G网络中租户与服务提供商之间兼顾双方利益的端到端SLA综合架构。该协议旨在明确所提供电信服务的可靠性、可用性与性能指标，确保信息能够安全可靠地在正确时间传递至正确目的地。我们还探讨了基于切片的网络SLA关键度量标准，包括吞吐量、违约条款、成本、收益、利润及QoS相关指标，这些要素在协议制定过程中至关重要。