Network operators are facing a critical issue on their optical transport networks to deploy 5G$+$+ and Internet of Things services. They need to address the capacity increase by a factor of 10, while keeping a similar cost per user. Over the past years, network operators have been working on the optical disaggregated approach with great interest for achieving the required efficiency and cost reduction. In particular, partially disaggregated optical networks make it possible to decouple the transponders from the transport system (known as an open line system) that are provided by different vendors. On the other hand, space division multiplexing (SDM) has been proposed as the key technology to overcome the capacity crunch that the optical standard single-mode fibers are facing to support the forecasted $10 \times$10× growth. Spatial core switching is gaining interest because it makes it possible to deploy SDM networks to bypass the overloaded wavelength division multiplexing (WDM) networks, by provisioning spatial media channels between WDM nodes. This paper presents, to the best of our knowledge, the first experimental demonstration of transport-application-programming-interface-enabled software defined networking control architecture for partially disaggregated multi-domain and multi-layer (WDM over SDM) optical networks.

中文翻译：

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支持TAPI的SDN控制，用于部分分解的多域（OLS）和多层（SDM上的WDM）光网络[已邀请]

网络运营商在其光传输网络上面临着部署5G $ + $ +和物联网服务的关键问题。他们需要解决容量增加10倍的问题，同时保持每位用户的成本不变。在过去的几年中，网络运营商一直对光分解方法进行研究，以实现所需的效率并降低成本。特别地，部分分解的光网络使得可以将应答器与由不同供应商提供的传输系统（称为开放系统）解耦。另一方面，已提出空分复用（SDM）作为克服光学标准单模光纤所面临的容量紧缩问题的关键技术，以支持预测的10美元乘10美元的增长。空间核心交换之所以引起人们的兴趣，是因为它可以通过在WDM节点之间提供空间媒体信道来部署SDM网络以绕过过载的波分复用（WDM）网络。据我们所知，本文首次演示了用于部分分解的多域和多层（SDM上的WDM）光网络的支持传输应用程序接口的软件定义的网络控制体系结构。