Ricard Vilalta

Ricard Vilalta
CTTC Catalan Telecommunications Technology Centre | CTTC · Optical Networking

PhD

About

264
Publications
35,012
Reads
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2,657
Citations
Introduction
Ricard Vilalta currently works at the Optical Networking, CTTC Catalan Telecommunications Technology Centre. Ricard does research in Computer Communications (Networks), Information Science and Algorithms.
Additional affiliations
March 2010 - present
CTTC Catalan Telecommunications Technology Centre
Position
  • Researcher

Publications

Publications (264)
Conference Paper
Full-text available
We report the design of a TAPI SDN control plane for multi-band networks with externalized PLI-aware RMSA. We detail the architecture, data model extensions, algorithms and the implementation and validation in an emulated BT 22-ROADM network. © 2022 The Author(s) 1. Introduction Optical transmission exploiting multiple optical bands is the sole sol...
Conference Paper
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.
Article
Network operators cannot change their footprint to upgrade the entire network to support SDN from scratch. Hence, network operators adapted the original SDN concept into a hybrid SDN approach to have a pragmatic, evolutionary, and economically viable solution. This article tests an SDN architecture based on a hierarchical structure of a Software-De...
Article
Full-text available
Network operators have been dealing with the necessity of a dynamic network resources allocation to provide a new generation of customer-tailored applications. In that sense, Telecom providers have to migrate their BSS/OSS systems and network infrastructure to more modern solutions to introduce end-to-end automation and support the new use cases de...
Article
Communication systems are used not only by voice or file exchange applications, but also by other types of applications due to the coexistence of multiple and different verticals. Each vertical has its own requirements in terms of key performance indicators (KPIs) for their applications. Mapping the verticals KPIs into network quality of service (Q...
Article
This paper presents a beyond 5G fronthaul network with dynamic beamforming and -steering. The proposed fronthaul solution deploys optical beamforming (OBF) by combining space division multiplexing (SDM), analogue radio-over-fiber (ARoF), and the novel optical beam forming network (OBFN) technologies. From the service management and orchestration (M...
Article
Full-text available
Network slicing will permit offering to vertical customers tailored end-to-end logical networks in an on-demand fashion, on top of a common telecom infrastructure, achieving a Slices-as-a-Service (SlaaS) business model. This is possible due to the progressive introduction of network softwarization techniques, such as programmability and virtualizat...
Chapter
This chapter provides an overview of potential network enhancements that can facilitate or improve the delivery of connected automated driving and connected road user services. The solutions presented expanded on infrastructure solutions such as slicing, software‐defined network, network function virtualization, and cloud radio access network to br...
Article
Full-text available
Vehicle-to-everything (V2X) communications enable real-time information exchange between vehicles and infrastructure, which extends the perception range of vehicles beyond the limits of on-board sensors and, thus, facilitating the realisation of cooperative, connected, and automated mobility (CCAM) services that will improve road safety and traffic...
Article
We experimentally demonstrate a 5G digital fronthaul network that relies on multi-adaptive and an autonomic control system for partially-disaggregated /. Transmission of 256-QAM 760.32 MHz radio signal is performed, with a total radio transmission capacity of 5.667 Gb/s. Digitized signal samples are carried as a 22.25 Gb/s data stream and transmitt...
Article
Vehicles will be wirelessly connected in the future, and they will be able to exchange information with other vehicles and their surroundings for safer and more efficient driving. 5G communication systems have introduced advanced functionalities and radio solutions to support connected, cooperative, and automated mobility (CCAM) services with deman...
Chapter
Future metro networks need to increase the transport capacity and improve the cost- and power-efficiency. These challenges are tackled by the EU-H2020 PASSION project exploiting dense photonic integration and cost-efficient optical technologies. Specifically, PASSION investigates a) modular sliceable bandwidth variable transceivers (S-BVTs) built u...
Article
Network operators are facing a critical issue on their optical transport networks to deploy 5G+ and Internet of Things services. They need to address the capacity increase by a factor of 10, while keeping a similar cost per user. Over the past years, network operators have been working on the optical disaggregated approach with great interest for a...
Chapter
Internet service providers are shifting to an open, modern, software-based architecture that enables both new operating and business models. The target architecture is loosely coupled, cloud-native, data and artificial intelligence-driven, and relies on traffic engineering-related protocols to get the full potential of the network capabilities. The...
Conference Paper
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.
Article
Full-text available
Network services in 5G will be rolled out as pools of virtual network functions (VNFs) exploiting the advantages of both software-defined networking and network function virtualization. In this context, 5G network services are envisaged as ordered sequences of VNFs resulting in the so-called VNF Forwarding Graphs (VNFFGs). Such VNFs can be allocate...
Technical Report
Full-text available
This deliverable presents the set of test cases selected for validation on the INSPIRE-5Gplus project. This set of test cases were selected by performing an exhaustive requirements elicitation of 5G security use cases defined in WP2, stemming from the new and enhanced 5G security and trust/liability assets developed in WP3 and WP4. Herein, we perfo...
Article
Full-text available
Transport network virtualization provides the necessary data and control plane technologies as key enablers of future networks. The interaction between network slicing and optical transport network virtualization architectures is under study to automate effective network resource orchestration. In this paper, we present an harmonized network slicin...
Article
The need of telecommunications operators to reduce Capital and Operational Expenditures in networks which traffic is continuously growing has made them search for new alternatives to simplify and automate their procedures. Because of the different transport network segments and multiple layers, the deployment of end-to-end services is a complex tas...
Conference Paper
Full-text available
The promise of disparate features envisioned by the 3GPP for 5G, such as offering enhanced Mobile Broadband connectivity while providing massive Machine Type Communications likely with very low data rates and maintaining Ultra Reliable Low Latency Communications requirements, create a very challenging environment for protecting the 5G networks them...
Conference Paper
Full-text available
5G will not simply be an evolution of mobile broadband networks as its predecessors, but will open the door to unique service capabilities, calling for new business models. In this context, Software Defined Networks (SDN) and Network Function Virtualization (NFV) are technologies that will shape the evolution of the telecom sector with new network...
Article
Full-text available
The blueSPACE project focuses on the study of innovative technologies to overcome the limitations of current fronthaul networks. The key technology proposed is space-division multiplexing, which makes it possible to increase the capacity available in conventional single-mode fibers, effectively encompassing this capacity to the forecasted bandwidth...
Chapter
In future 5G infrastructures, network services will be deployed through sets of Virtual Network Functions (VNFs) leveraging the advantages of both Software Defined Networking (SDN) and Network Function Virtualization (NFV). A network service is composed of an ordered sequence of VNFs, i.e., VNF Forwarding Graph (VNFFG), deployed across distributed...
Chapter
Most deployed optical transport networks are proprietary, behaving as a closed, highly coupled, single-vendor managed domain. Although their control planes and management systems may export high-level and open northbound interfaces (NBI), the internal details and interfaces are not disclosed to the network operator. However, driven by the requireme...
Chapter
During last years, novel protocols and data models are arising to control and monitor optical network equipment. These protocols enable network programmability and automation by fulfilling the vision introduced by Software Defined Networking (SDN).
Article
Network slicing has been a major selling point of 5G networks, where a slice is roughly defined as a self-contained logical network on top of a shared infrastructure tailored for a specific service or vertical industry, composed of heterogeneous resources (computing, storage, bandwidths) and typically involving specific application and/or networkin...
Article
Software-defined networking (SDN) and disaggregation are key technologies to fulfill the requirements of 5G and beyond optical metro networks. Indeed, open networking solutions will reduce vendor lock-in, achieving increased flexibility and programmability of the network. SDN-enabled sliceable bandwidth/bitrate variable transceivers (S-BVTs) are pr...
Article
Network operators are evolving their Optical Transport Networks in order to make them cost effective. In some scenarios, this means considering adopting Software Defined Networking principles along with open and standard interfaces, leveraging the underlying hardware programmability while, at the same time, considering the benefits of (partial) dis...
Article
Space division multiplexing (SDM) super-channels are the only way to guarantee a sustainable scaling of the optical line interface rate. High-capacity terabit interfaces can be deployed by logically associating several optical sub-channels transmitted in parallel in different spatial cores or modes in order to create an (logical) optical channel wi...
Conference Paper
We present the first SDN-enabled multi-domain multi-layer (WDM/SDM) control architecture for partially disaggregated optical networks with multiple WDM and SDM OLS domains and transponders to provision end-to-end TAPI connectivity services involving spatial and optical channels.
Conference Paper
We present a cloud-native architecture for Optical SDN Controllers based on ABNO architecture and gRPC interfaces, which is demonstrated and evaluated. Autoscaling mechanisms for high request loads and auto-healing support are evaluated.
Conference Paper
We report the design and implementation of an OLS controller in a hierarchical (partial & full) disaggregation, using open standard data models. We detail the constrained path computation in hybrid fixed/flexi networks and its testbed validation.