Ramon Casellas
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View article: Continuous variable QKD in flexible optical networks for future quantum secure connectivity
Continuous variable QKD in flexible optical networks for future quantum secure connectivity Open
Future optical networks, envisioning the support of 6G services and related demanding requirements, should provide ultra-high-capacity and reliable connectivity, ensuring sustainability and security. Quantum key distribution (QKD) is a tec…
View article: Self-configuring metro-access network with OpenXR Pluggables and filter-less OADMs
Self-configuring metro-access network with OpenXR Pluggables and filter-less OADMs Open
We present a proof-of-concept (PoC) of a metro-access optical network that uses automatically reconfigurable OpenXR Pluggables and filter-less optical add-drop multiplexers (OADMs) over a chain of access nodes connected to two metro nodes …
View article: End-to-end transport network digital twins with cloud-native SDN controllers and generative AI [Invited]
End-to-end transport network digital twins with cloud-native SDN controllers and generative AI [Invited] Open
This paper explores the potential of network digital twins (NDTs) in networking (both IP Ethernet networks and optical transport networks), highlighting their integration with cloud-native software-defined networking (SDN) controllers and …
View article: Quantum computing approach for multi-objective routing and spectrum assignment optimization
Quantum computing approach for multi-objective routing and spectrum assignment optimization Open
Optimization problems are fundamental in a wide range of fields, including telecommunications, where efficient resource allocation is critical to ensure good network performance and high scalability. In the context of elastic optical netwo…
View article: Autonomous SDN-Driven Operations in Disaggregated Open Optical Transport Network with Coherent Pluggable Transceivers: A Demonstration
Autonomous SDN-Driven Operations in Disaggregated Open Optical Transport Network with Coherent Pluggable Transceivers: A Demonstration Open
This demonstration validates autonomous operations of an optical SDN controller to deliver QoT-enabled optical connectivity services, leveraging open control interfaces, real-time telemetry, and effective recovery strategies in a disaggreg…
View article: Autonomous Closed-Loop Operations to Ensure QoT Connections in SDN-controlled Elastic Optical Networks
Autonomous Closed-Loop Operations to Ensure QoT Connections in SDN-controlled Elastic Optical Networks Open
This work presents an autonomous SDN controller for EONs, detailing closed-loop QoT management with telemetry, a QoT tool, and a Path Computation Server. Two recovery strategies for QoT-degraded services are proposed and numerically compar…
View article: Performance Analysis of Single Band and Multi-Band Transponders for CD-ROADM based S-, C-, L-band WDM networks
Performance Analysis of Single Band and Multi-Band Transponders for CD-ROADM based S-, C-, L-band WDM networks Open
This paper compares single-band and multi-band transponders for CD-ROADM nodes in UWB-WDM Networks, covering the S, C, and L bands. We also consider various add/drop configurations with WSS of different sizes.
View article: Autonomous Service Provisioning and Self-Healing in Multi-Band Multi-Domain IPoWDM Networks
Autonomous Service Provisioning and Self-Healing in Multi-Band Multi-Domain IPoWDM Networks Open
We report on a large-scale demonstration across access, metro, and core networks, using commercial and prototype of multi-band components, achieving significantly reduced provisioning time for live video traffic through seamless IP and opt…
View article: Dynamic Optimization in SDN-Enabled EONs with CV-QKD coexistence
Dynamic Optimization in SDN-Enabled EONs with CV-QKD coexistence Open
This paper presents dynamic spectrum allocation strategies to mitigate noise impact on quantum channels, reduce blocking probability for quantum and classical channels, and optimize spectrum utilization leveraging an SDN architecture for i…
View article: Novel Application of Quantum Computing for Routing and Spectrum Assignment in Flexi-Grid Optical Networks
Novel Application of Quantum Computing for Routing and Spectrum Assignment in Flexi-Grid Optical Networks Open
Flexi-grid technology has revolutionized optical networking by enabling Elastic Optical Networks (EONs) that offer greater flexibility and dynamism compared to traditional fixed-grid systems. As data traffic continues to grow exponentially…
View article: Node design in Self-Managed Sustainable High-Capacity Optical Networks (SEASON)
Node design in Self-Managed Sustainable High-Capacity Optical Networks (SEASON) Open
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View article: Dynamic control, routing, and resource assignment in multi-granular optical node topologies combining wavelength, waveband, and spatial switching for 6G transport networks [Invited]
Dynamic control, routing, and resource assignment in multi-granular optical node topologies combining wavelength, waveband, and spatial switching for 6G transport networks [Invited] Open
Effective management of end-to-end 6G network services is crucial, with peak capacity requirements for 6G transport connections expected to exceed 1 Tb/s. As demand for high bandwidth rises, there is a growing necessity for high-capacity o…
View article: Demonstration of Multi-Tenant Optical Transport Network Slicing with T-API
Demonstration of Multi-Tenant Optical Transport Network Slicing with T-API Open
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View article: Network Resource Allocation for Gaming Using MEC API and TeraFlowSDN
Network Resource Allocation for Gaming Using MEC API and TeraFlowSDN Open
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View article: Roadmap on optical communications
Roadmap on optical communications Open
The Covid-19 pandemic showed forcefully the fundamental importance broadband data communication and the internet has in our society. Optical communications forms the undisputable backbone of this critical infrastructure, and it is supporte…
View article: Security and Trust in Open and Disaggregated 6G networks
Security and Trust in Open and Disaggregated 6G networks Open
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View article: Multi-Domain Transparent Service Provisioning in Multi-Band Optical Networks
Multi-Domain Transparent Service Provisioning in Multi-Band Optical Networks Open
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View article: Node Architectures for High-Capacity Multi-band Over Space Division Multiplexed (MBoSDM) Optical Networks
Node Architectures for High-Capacity Multi-band Over Space Division Multiplexed (MBoSDM) Optical Networks Open
This research considers the evolution of optical networks and the rising difficulties linked to managing optical signal switching within the network, especially when dealing with multi-band over spatial division multiplexing (MBoSDM) syst…
View article: On the Control of Multi-Function Reprogrammable Silicon Chip for ROADMs and Sliceable Transceivers
On the Control of Multi-Function Reprogrammable Silicon Chip for ROADMs and Sliceable Transceivers Open
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View article: Autonomous Control Operations for Energy-Efficient Packet Optical Networks
Autonomous Control Operations for Energy-Efficient Packet Optical Networks Open
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View article: Experimental Validation of an Efficient DRL-based Routing and Spectrum Assignment for Optical Network Automation
Experimental Validation of an Efficient DRL-based Routing and Spectrum Assignment for Optical Network Automation Open
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View article: Advanced optical transceiver and switching solutions for next-generation optical networks
Advanced optical transceiver and switching solutions for next-generation optical networks Open
Innovative transceiver and switching approaches should be explored with special focus on flexibility, energy efficiency, sustainability, and interoperability to be adopted on next-generation 6G optical networks driven by the diverse landsc…
View article: Photonic device programmability in support of autonomous optical networks
Photonic device programmability in support of autonomous optical networks Open
The emergence and consolidation of increasingly programmable optical devices such as transceivers, amplifiers, multiplexers, or ROADMs—which allow their remote configuration and control by adopting software-defined networking principles su…
View article: Continuous-Variable Quantum Key Distribution for Enabling Sustainable Secure 6G Networks
Continuous-Variable Quantum Key Distribution for Enabling Sustainable Secure 6G Networks Open
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View article: Exploiting GNN and DRL for Online Service Provisioning Over Elastic Optical Networks
Exploiting GNN and DRL for Online Service Provisioning Over Elastic Optical Networks Open
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View article: Guest Editorial Introduction to the OFC 2023 Special Issue
Guest Editorial Introduction to the OFC 2023 Special Issue Open
[No abstract available]
View article: Introducing end-to-end location awareness in packet-optical networks
Introducing end-to-end location awareness in packet-optical networks Open
This paper discusses the deployment of End-to-End packet-optical connectivity services over an edge-cloud continuum, considering the importance of location awareness. It proposes architecture, data models, and placement algorithms for prov…
View article: Demonstration of intent-based networking for end-to-end packet optical cloud-native SDN orchestration
Demonstration of intent-based networking for end-to-end packet optical cloud-native SDN orchestration Open
This demonstration presents a novel Intent Based Networking engine to interact with a Packet Optical SDN controller including Natural Language Processing to translate user commands to control and manage network operations. An interactive U…
View article: Modular control plane implementation for disaggregated optical transport networks with multi-band support
Modular control plane implementation for disaggregated optical transport networks with multi-band support Open
This demo paper presents the B5G-OPEN control plane modular architecture designed to enable dynamic control of multi-band disaggregated optical networks through open-source software and standard interfaces. Such control plane will be demon…
View article: Leveraging Programmability of Photonic Devices Towards Agile and Autonomous Optical Networks
Leveraging Programmability of Photonic Devices Towards Agile and Autonomous Optical Networks Open
The emergence and consolidation of increasingly programmable optical devices (transceivers, amplifiers, multiplexers), which allow their remote configuration and control into multiple modes of operation, is enabling the evolution towards m…