The current deployment of 5G networks in a way to support the highly demanding service types defined for 5G, has brought the need for using new techniques to accommodate legacy networks to such requirements. Network Slicing in turn, enables sharing the same underlying physical infrastructure among services with different requirements, thus providing a level of isolation between them to guarantee their proper functionality. In this work, we analyse from an architectural point of view, the required coordination for the provisioning of 5G services over multiple network segments/domains by means of network slicing, considering as well the use of sensors and actuators to maintain slices performance during its lifetime. We set up an experimental multi-segment testbed to demonstrate end-to-end service provisioning and its guarantee in terms of specific QoS parameters, such as latency, throughput and Virtual Network Function (VNF) CPU/RAM consumption. The results provided, demonstrate the workflow between different network components to coordinate the deployment of slices, besides providing a set of examples for slice maintenance through service monitoring and the use of policy-based actuations.

中文翻译：

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通过网络切片使能多段5G业务开通和维护

当前 5G 网络的部署以支持为 5G 定义的高要求服务类型，因此需要使用新技术来满足传统网络的需求。反过来，网络切片允许在具有不同要求的服务之间共享相同的底层物理基础设施，从而在它们之间提供一定程度的隔离以保证它们的正常功能。在这项工作中，我们从架构的角度分析了通过网络切片在多个网段/域上提供 5G 服务所需的协调，并考虑使用传感器和执行器在其生命周期内保持切片性能. 我们建立了一个实验性多段测试平台，以展示端到端服务供应及其在特定 QoS 参数方面的保证，例如延迟、吞吐量和虚拟网络功能 (VNF) CPU/RAM 消耗。所提供的结果展示了不同网络组件之间协调切片部署的工作流程，此外还提供了一组通过服务监控和使用基于策略的驱动进行切片维护的示例。