Publications

Conferences

Dynamic bypass of wavelength switching in SDN-enabled WDM VNTs over SDM Networks with high bit-rate optical channels

2023 Optical Fiber Communications Conference and Exhibition (OFC2023)
We experimentally demonstrate an SDN architecture for WDM VNTs to offload pass-through high bit-rate optical channels from overloaded ROADMs by provisioning spatial channels between the source and destination ROADM’s add-drop stages, and rerouting the optical channels.
Conferences

Dynamic Reconfiguration of WDM Virtual Network Topology over SDM Networks for Spatial Channel Failure Recovery with gRPC Telemetry

2022 Optical Fiber Communications Conference and Exhibition (OFC2022)
We experimentally demonstrate the dynamic reconfiguration of WDM VNTs in response to SDM spatial channel failures. We present an SDN control architecture with gRPC-telemetry and analytics to detect failures and restore failed virtual WDM links.
Conferences

Microservice-Based Unsupervised Anomaly Detection Loop for Optical Networks

2022 Optical Fiber Communications Conference and Exhibition (OFC2022)
Unsupervised learning (UL) is a technique to detect previously unseen anomalies without needing labeled datasets. We propose the integration of a scalable UL-based inference component in the monitoring loop of an SDN-controlled optical network.
Conferences

Demonstration of Zero-touch Device and L3-VPN Service Management using the TeraFlow Cloud-native SDN Controller

2022 Optical Fiber Communications Conference and Exhibition (OFC2022)
We demonstrate zero-touch device bootstrapping, monitoring, and L3-VPN service management using the novel TeraFlow OS SDN controller prototype.
Conferences

Experimental Demonstration of End-to-end NFV Orchestration on Top of the ADRENALINE Testbed

2022 IEEE International Conference on Network Softwarization (NetSoft2022)
This demonstration will showcase the end-to-end orchestration of virtual network functions in the full-fledged ADRENALINE Testbed Cloud Platform expanding from the edge to the cloud.
Conferences

Dynamic Upgrade/Downgrade of WDM Link Capacity in SDN-enabled WDM VNTs over SDM Networks

2022 European Conference on Optical Communication (ECOC2022)
We present a WDM over SDM control system that detects overloaded/underloaded WDM links between ROADMs and provisions/removes virtual WDM links in response to dynamic traffic changes in SDN-enabled WDM VNTs over SDM Networks.
Journals

Scalability analysis of machine learning QoT estimators for a cloud-native SDN controller on a WDM over SDM network

2022 - Journal of Optical Communications and Network, Vol. 14, Issue 4, pp. 257-266
Maintaining a good quality of transmission (QoT) in optical transport networks is key to maintaining the service level agreement between the user and the service provider.
Conferences

SDN Control Architectures for WDM over SDM (WDMoSDM) Networks

2021 Photonics in Switching and Computing Conference
We provide an overview of SDN control architectures for WDM over SDM (WDMoSDM) optical networks. We address dynamic management of end-to-end connec- tivity services and WDM virtual network topologies (VNTs) for partially disaggregated multi-domain WDMoSDM networks.
Conferences

First Scalable Machine Learning Based Architecture for Cloud-native Transport SDN Controller

2021 Optical Fiber Communications Conference and Exhibition (OFC2021)
We present a cloud-native architecture with a machine learning QoT predictor that enables cognitive functions in transport SDN controllers. We evaluate the QoT predictor training and auto-scaling capabilities in a real WDM/SDM testbed.
Conferences

Multi-layer Transport Network Slicing with Hard and Soft Isolation

2021 Optical Fiber Communications Conference and Exhibition (OFC2021)
We validate the deployment of isolated transport network slices in IP over DWDM network. To this end, an isolated transport network slice is deployed using multi-layer isolation mechanisms based on OpenConfig and ONF Transport API.
Conferences

Demo paper: Scalable Architecture for Cloud-native Transport SDN Controller Using GNPy and Machine Learning techniques for QoT estimation

2021 Optical Fiber Communications Conference and Exhibition (OFC2021)
This demo shows a cloud-native SDN controller that can estimate end-to-end QoT using both analytical (GNPy) and machine learning algorithms on WDM systems. This transport SDN controller is able to scale horizontally using custom metrics.
Conferences

Scalable Physical Layer Security Components for Microservice-Based Optical SDN Controllers

2021 European Conference on Optical Communication (ECOC2021)
We propose and demonstrate a set of microservice-based security components able to perform physical layer security assessment and mitigation in optical networks. Results illustrate the scalability of the attack detection mechanism and the agility in mitigating attacks.
Conferences

First Demonstration of Dynamic Deployment of SDN-enabled WDM Virtual Network Topologies (VNTs) over SDM networks

  • Filippos Balasis
  • Ramon Casellas
  • Ricardo Martínez
  • Cen Wang
  • Noboru Yoshikane
  • Itsuro Morita
  • Takehiro Tsuritani
2021 European Conference on Optical Communication (ECOC2021)
We present the dynamic deployment of logical WDM VNTs by deploying virtual links between ROADM/OXC nodes using spatial channels provided by SDM networks.
Journals

Packet Optical Transport Network Slicing with Hard and Soft Isolation

2021 - Applied Sciences, 11(13), 6219
Network operators have been dealing with the necessity of a dynamic network resources allocation to provide a new generation of customer-tailored applications.