Versatile Optical Path Calculation and Monitoring Using Common YANG Model

The recent evolution in technologies such as software-defined networking (SDN) and network function virtualization (NFV) allows telecom operators to transform network management and operation driving the automation of each management process such as configuration and monitoring. In the 5th generation (5G) era, end-to-end (E2E) life cycle automation is expected to enhance flexibility, robustness and optimization of networks and services. E2E automation involves the management of multiple networking domains including optical networks where disaggregation is in progress. In this paper, we describe how we designed and implemented a novel optical path calculation and monitoring system for the management of optical networks toward E2E automation. Our proposed system consists of an SDN controller to calculate and provision optical paths and a telemetry analysis framework to monitor and analyze the paths, both of which are able to manage multi-vendor equipment using the common Yet Another Next Generation (YANG) data model. Furthermore, the common model enables setting up monitoring parameters automatically in deploying the paths. We demonstrated the provisioning and monitoring of the new wavelength path set in a heterogeneous environment including auto-configuration of monitoring, which showed that the proposed architecture provides the assurance functionality that predicts and monitors the optical transmission quality to guarantee the interoperability of the disaggregated elements.