Envisioned 5G applications and services, such as Tactile Internet, Industry 4.0 use-cases, remote control of drone swarms, pose serious challenges to the underlying networks and cloud platforms. On the one hand, evolved cloud infrastructures provide the IT basis for future applications. On the other hand, networking is in the middle of a momentous revolution and important changes are mainly driven by Network Function Virtualization (NFV) and Software Defined Networking (SDN). A diverse set of cloud and network resources, controlled by different technologies and owned by cooperating or competing providers, should be coordinated and orchestrated in a novel way in order to enable future applications and fulfill application level requirements. In this paper, we propose a novel cross domain orchestration system which provides wholesale XaaS (Anything as a Service) services over multiple administrative and technology domains. Our goal is threefold. First, we design a novel orchestration system exploiting a powerful information model and propose a versatile embedding algorithm with advanced capabilities as a key enabler. The main features of the architecture include $i$ ) efficient and multi-purpose service embedding algorithms which can be implemented based on graph models, $ii$ ) inherent multi-domain support, $iii$ ) programmable aggregation of different resources, $iv$ ) information hiding together with flexible delegation of certain requirements enabling multi-operator use-cases, and $v$ ) support for legacy technologies. Second, we present our proof-of-concept prototype implementing the proposed system. Third, we establish a dedicated test environment spanning across multiple European sites encompassing sandbox environments from both operators and the academia in order to evaluate the operation of the system. Dedicated experiments confirm the feasibility and good scalability of the whole framework.

中文翻译：

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从愿景到现实的 5G 应用：多运营商编排

设想中的 5G 应用和服务，例如触觉互联网、工业 4.0 用例、无人机群的远程控制，对底层网络和云平台构成了严峻挑战。一方面，演进的云基础设施为未来的应用程序提供了 IT 基础。另一方面，网络正处于一场重大革命之中，重要的变化主要是由网络功能虚拟化（NFV）和软件定义网络（SDN）驱动的。由不同技术控制并由合作或竞争提供商拥有的一组多样化的云和网络资源应以新颖的方式进行协调和编排，以支持未来的应用程序并满足应用程序级别的要求。在本文中，我们提出了一种新颖的跨域编排系统，该系统可在多个管理和技术域上提供批发 XaaS（任何事物即服务）服务。我们的目标是三重的。首先，我们利用强大的信息模型设计了一个新颖的编排系统，并提出了一种具有高级功能的通用嵌入算法作为关键推动因素。该架构的主要特点包括 $i$ ) 可以基于图模型实现的高效和多用途的服务嵌入算法， $ii$ ) 固有的多域支持， $iii$ ) 不同资源的可编程聚合， $iv$ ) 信息隐藏与某些要求的灵活委派一起​​实现多运营商用例，和 $v$ ) 支持遗留技术。其次，我们展示了实现所提议系统的概念验证原型。第三，我们建立了一个跨越多个欧洲站点的专用测试环境，包括来自运营商和学术界的沙箱环境，以评估系统的运行情况。专门的实验证实了整个框架的可行性和良好的可扩展性。