The need of introducing interoperability in the transport network segment has motivated the emergence of several open initiatives and standardization efforts for the development of different interfaces to allow Software Defined Network (SDN) controllers manage and control the network devices. Optical disaggregation in particular aims the introduction of standard device-level interfaces in the optical terminals and line-systems to ‘open’ them from vendor lock-in situations, allowing an interoperable ecosystem in the optical network's transport segment. In this article, it is firstly presented the Software Defined Transport Network (SDTN) architecture, as the control and management framework to build a L0-L3 multi-layer, multi-technology transport network, enabling end-to-end network service delivery. Later, we introduce the partially disaggregated network architecture proposed, including the technical assessment of the topology discovery and resilience service provisioning use cases, by providing a low-level description of the information models employed and the translation between models. To conclude, a proof-of-concept of multi-layer service provisioning over resilient disaggregated multi-vendor testbed is presented, including the results obtained in the experimental demonstration presented in last 2019 Optical Fiber Conference (OFC).

中文翻译：

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在弹性软件定义的部分分解网络上提供多层服务

在传输网络部分引入互操作性的需求促使出现了一些开放计划和标准化工作，用于开发不同的接口，以允许软件定义网络 (SDN) 控制器管理和控制网络设备。光分解尤其旨在在光终端和线路系统中引入标准的设备级接口，以从供应商锁定的情况下“开放”它们，从而在光网络的传输段中实现可互操作的生态系统。在本文中，首先提出软件定义传输网络（SDTN）架构，作为控制和管理框架，构建L0-L3多层、多技术传输网络，实现端到端网络服务交付。之后，我们通过提供所采用信息模型的低级描述和模型之间的转换，介绍了所提出的部分分解的网络架构，包括拓扑发现和弹性服务供应用例的技术评估。总而言之，本文提出了在弹性分解多供应商测试平台上提供多层服务的概念验证，包括在 2019 年光纤会议 (OFC) 上展示的实验演示中获得的结果。