Practical Mitigation of Smart Contract Bugs

  • Jens-Rene Giesen
  • Sebastien Andreina
  • Michael Rodler
  • Ghassan Karame
  • Lucas Davi
Under review (preprint)
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.

On the Storage Overhead of Proof-of-Work Blockchains

  • Alessandro Sforzin
  • Matteo Maso
  • Claudio Soriente
  • Ghassan Karame
Proceedings of the IEEE Blockchain Conference (IEEE Blockchain), 2022 (to appear) Abstract: Permissionless blockchains such as Bitcoin have long been criticized for their high computational and storage overhead.

MITOSIS: Practically Scaling Permissioned Blockchains

  • Giorgia Azzura Marson
  • Sebastien Andreina
  • Konstantin Munichev
  • Ghassan Karame
In this work, we address this problem and present MITOSIS, a novel approach to practically improve scalability of permissioned blockchains

Improving the quality of generative models through Smirnov transformation

  • Ángel González-Prieto
  • Alberto Mozo (UPM)
  • Sandra Gómez-Canaval (UPM)
  • Edgar Talavera
Solving the convergence issues of Generative Adversarial Networks (GANs) is one of the most outstanding problems in generative models. In this work, we propose a novel activation function to be used as output of the generator agent.

B5GEMINI: AI-driven Network Digital Twin

  • Alberto Mozo
  • Amit Karamchandani
  • Sandra Gómez-Canaval
  • Mario Sanz
  • José Ignacio Moreno
  • Antonio Pastor
Sensors 2022, 22, 4106

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

  • Pol Alemany
  • Ricard Vilalta
  • Raul Muñoz
  • Ramon Casellas and
  • Ricardo Martínez
2021 Optical Fiber Communications Conference and Exhibition (OFC)
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.

Synthetic flow-based cryptomining attack generation through Generative Adversarial Networks

  • Alberto Mozo
  • Ángel González-Prieto
  • Antonio Pastor
  • Sandra Gómez-Canaval
  • Edgar Talavera
Scientific Reports volume 12, Article number: 2091 (2022)

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

  • Lluis Gifre
  • Carlos Manso
  • Ramon Casellas
  • Ricardo Martine
  • Ricard Vilalta
  • Raul Muñoz
IEEE International Conference on Network Softwarization (NetSoft2022)

QoS-Aware Inter-Domain Connectivity: Control Plane Design and Operational Considerations

  • Stanislav Lange
  • Jane Frances Pajo
  • Thomas Zinner
  • Håkon Lønsethagen
  • Min Xie
IFIP/IEEE FlexNGIA Workshop 2022
Abstract: Scenarios related to 5G and beyond give rise to a high degree of heterogeneity in terms of applications, services, and user expectations as well as more demanding QoS requirements with an end-to-end scope that can cover multiple operator domains.

Demo Track Paper: Demonstrating QoE-aware 5G Network Slicing Emulated with HTB in OMNeT++

  • Marija Gajic
  • Marcin Bosk
  • Susanna Schwarzmann
  • Stanislav Lange
  • Thomas Zinner
IEEE International Conference on Computer Communications 2022
Today's networks support a great variety of services with different bandwidth and latency requirements. To maintain high user satisfaction and efficient resource utilization, providers employ traffic shaping.

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

  • Pol Alemany
  • Ricard Vilalta
  • Raul Munoz
  • Ramon Casellas
  • Ricardo Martinez
Journal of Optical Communications and Networking (Volume: 14, Issue: 4, April 2022)
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.

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

  • Ll. Gifre
  • C. Natalino
  • S. Gonzalez-Diaz
  • F. Soldatos
  • S. Barguil
  • C. Aslanoglou
  • F. J. Moreno-Muro
  • A. N. Quispe Cornelio
  • L. Cepeda, R. Martinez
  • C. Manso
  • V. Apostolopoulos
  • S. Petteri Valiviita
  • O. Gonzalez de Dios
  • J. Rodriguez
  • R. Casellas
  • P. Monti
  • G. P. Katsikas
  • R. Munoz
  • R. Vilalta
The Optical Networking and Communication Conference & Exhibition - OFC2022

Architecture to Deploy and Operate a Digital Twin Optical Network

  • R. Vilalta
  • R. Casellas
  • Ll. Gifre
  • R. Muñoz
  • R. Martínez
  • A. Pastor
  • D. Lopez
  • J.P. Fernandez-Palacios
The Optical Networking and Communication Conference & Exhibition - OFC2022

Microservice-Based Unsupervised Anomaly Detection Loop for Optical Networks

  • Carlos Natalino
  • Carlos Manso
  • Lluis Gifre
  • Raul Muñoz
  • Ricard Vilalta
  • Marija Furdek
  • Paolo Monti
The Optical Networking and Communication Conference & Exhibition - OFC2022

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

  • Raul Munoz
  • Carlos Manso
  • Filippos Balasis
  • Ramon Casellas
  • Ricard Vilalta
  • Cen Wang
  • Noboru Yoshikane
  • Takehiro Tsuritani
  • Itsuro Morita
The Optical Networking and Communication Conference & Exhibition - OFC22

SDN Control Architectures for WDM over SDM (WDMoSDM) Networks

  • R. Muñoz
  • N. Yoshikane
  • C. Manso
  • R. Casellas
  • R. Vilalta
  • R. Martínez
  • F. Balasis
  • C. Wang
  • T. Tsuritani
  • I. Morita
Proceedings of Photonics in Switching and Computing Conference, 27 - 29 September 2021, virtual event.
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.

HTBQueue: A Hierarchical Token Bucket Implementation for the OMNeT++/INET Framework

  • Marcin Bosk
  • Marija Gajic
  • Susanna Schwarzmann
  • Stanislav Lange
  • Thomas Zinner
8th OMNET++ community summit, 2021
The hierarchical token bucket (HTB) algorithm allows to specify per-flow bitrate guarantees and enables excess bandwidth sharing between flows of the same class. Additionally, it provides capabilities to prioritize the traffic of specific flows, potentially considering their delay demands.

Role of monitoring and analytics in next-generation optical networks

  • Lluis Gifre Renom
  • Fabien Boitier
2021 European Conference on Optical Communication (ECOC)
We study the requirements that Control, Orchestration, and Management (COM) systems for optical networks should fulfil, present a minimal set of components they should implement, and propose our research point of view regarding the future needs for COM systems for optical networks.

Advances in SDN control for Beyond 100G disaggregated optical networks

  • Ramon Casellas
  • Ricardo Martínez
  • Ricard Vilalta
  • Raúl Muñoz
  • Alfredo González-Muñiz
  • Oscar González de Dios
  • Juan Pedro Fernández-Palacios
2021 European Conference on Optical Communication (ECOC)
This tutorial considers the evolution of SDN control for optical transport networks in disaggregated scenarios, focusing on its requirements and challenges when applied to "beyond 100G" networks - term that jointly refers to the use of coherent technology, data rates beyond 100G and the evolution

Demo paper: Scalable and Resilient Network Traffic Engineering Using Erlang-based Path Computation Element

  • Sebastien Merle
  • Juan Pedro Fernández-Palacios
  • Oscar González de Dios
  • Lluís Gifre
  • Ricard Vilalta
  • Peer Stritzinger
VII IEEE Conference on Network Function Virtualization and Software Defined Networks (IEEE NFV-SDN 2021)

Using 5G QoS Mechanisms to Achieve QoE-Aware Resource Allocation

  • Marcin Bosk
  • Marija Gajić
  • Susanna Schwarzmann
  • Stanislav Lange
  • Riccardo Trivisonno
  • Clarissa Cassales Marquezan
  • Thomas Zinner
17th International Conference on Network and Service Management
Abstract: Network operators generally aim at providing a good level of satisfaction to their customers. Diverse application demands require the usage of beyond best-effort resource allocation mechanisms, particularly in resource-constrained environments.

Packet Optical Transport Network Slicing with Hard and Soft Isolation

  • Samier Barguil
  • Victor Lopez Alvarez
  • Luis Miguel Contreras Murillo
  • Oscar Gonzalez de Dios
  • Alejandro Alcala Alvarez
  • Carlos Manso
  • Pol Alemany
  • Ramon Casellas
  • Ricardo Martinez
  • David Gonzalez-Perez
  • Xufeng Liu
  • Jose-Miguel Pulido
  • Juan Pedro Fernandez-Palacios
  • Raul Muñoz
  • Ricard Vilalta
Applied Sciences 2021, 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.

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

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

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

  • Natalino, Carlos
  • Manso, Carlos
  • Vilalta, Ricard
  • Monti, Paolo
  • Munoz, Raul
  • Furdek, Marija
2021 European Conference on Optical Communication (ECOC)
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.

Optical Network Telemetry with Streaming Mechanisms using Transport API and Kafka

  • Ricard Vilalta
  • Ramon Casellas
  • Ricardo Martinez
  • Raul Muñoz
  • Alfredo González-Muñiz
  • Juan Pedro Fernández-Palacios
2021 European Conference on Optical Communication (ECOC)
We present a streaming mechanism for optical networks based on the Kafka architecture and protocols, to efficiently distribute state and network updates following the upcoming ONF Transport API streaming implementation agreement.