Publications

Conferences

End-to-End Inter-domain Transport Network Slice Management Using DLT-enabled Cloud-based SDN Controllers (invited paper)

2023 Optical Fiber Communications Conference and Exhibition (OFC2023)
This paper discusses the advantages and challenges of multiple architectures that consider the negotiation of inter-domain transport network slices using blockchain technologies. To this end, we present results obtained using cloud-native ETSI TeraFlowSDN controller.
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

Demo Paper: "Slice Grouping for Transport Network Slices Using Hierarchical Multi-domain SDN Controllers"

2023 Optical Fiber Communications Conference and Exhibition (OFC2023)
This demonstration showcases how TeraFlowSDN provides support for hierarchical control of multiple heterogeneous SDN domains (through IP, microwave and optical technologies). Different transport slices are offered with multiple SLAs and grouped to optimize resources.
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

Architecture to Deploy and Operate a Digital Twin Optical Network

2022 Optical Fiber Communications Conference and Exhibition (OFC2022)
We propose an architecture to deploy Digital Twin Optical Networks (DTON), which provide a virtual representation of the physical optical network. DTON allow the assessment of specific behaviors before actual implementation in the physical 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.
Conferences

Experimental Demonstration of Transport Network Slicing with SLA Using the TeraFlowSDN Controller

2022 European Conference on Optical Communication (ECOC2022)
This demo presents the TeraFlowSDN controller as a solution to provide dedicated transport network slices with SLAs. To this end, the demo details how the interface between an NFV orchestrator and the SDN controller can provide transport network slices using protected disjoint paths.
Conferences

End-to-End Interdomain Transport Network Slice Management Using Cloud-based SDN Controllers

2022 27th OptoElectronics and Communications Conference (OECC) and 2022 International Conference on Photonics in Switching and Computing (PSC)
In spite of their popularity, developing secure smart contracts remains a challenging task. Existing solutions are either impractical as they do not support many complex real-world contracts or leave the burden to developers for fixing bugs.
Journals

Evaluation of the abstraction of optical topology models in blockchain-based data center interconnection

2022 - Journal of Optical Communications and Networking, Vol. 14, Issue 4, pp. 211 - 221
Data center (DC) interconnection allows us to have optical transmissions between DCs directly connected to optical networks, avoiding the use of a packet-based infrastructure.
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

End-to-End Network Slice Stitching using Blockchain-based Peer-to-Peer Network Slice Managers and Transport SDN Controllers

2021 Optical Fiber Communications Conference and Exhibition (OFC2021)
This paper presents and experimentally validates a Blockchain-based architecture to manage End-to-End Network Slice Deployment by stitching Network Slice Subnets in edge/cloud computing domains connected through packet/optical transport networks domains managed by different operators.
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.