Fundacio I2CAT

Barcelona, Spain

Fundacio I2CAT

Barcelona, Spain
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Grasa E.,Fundacio i2CAT | Trouva E.,Fundacio i2CAT | Bunch S.,TRIA Network Systems LLC | Dewolf P.,TRIA Network Systems LLC | Day J.,Boston University
Proceedings of the 7th International Conference on Future Internet Technologies, CFI'12 | Year: 2012

RINA is a very promising internetwork architecture based on the fundamental patterns presented in the "Patterns in Network Architecture" book. This paper describes the rationale, major design choices and implementation of a RINA prototype over UDP/IP. The prototype is mainly a tool for research and experimentation, the outcome of this work is not meant to be the final solution, but a vehicle to think deeply and experiment around RINA open research areas. Copyright © 2012 by the Association for Computing Machinery, Inc.

Bock C.,Fundacio i2CAT | Figuerola S.,Fundacio i2CAT | Parker M.C.,University of Essex | Quinlan T.,University of Essex | Walker S.D.,University of Essex
International Conference on Transparent Optical Networks | Year: 2012

This paper presents an innovative high-bandwidth access network architecture that offers transparent transport services for fixed and mobile applications. Key to this is the development of a high-functionality, low-energy active remote node (ARN) offering high-speed switching and statistical- multiplexing features for maximal exploitation of available network resources, together with radio, wavelength conversion and legacy systems compatibility. The proposed architecture features an optimized and sophisticated management and control plane, allowing service providers to transparently monitor their connections, so simplifying network management and application interoperability with heterogeneous networks. Although inherently future-proofed, the proposed network platform is also intrinsically compatible with existing PON and wireless access solutions: fixed fibre and radio access, LTE and beyond, and legacy services (CATV and DSL technologies) can all be delivered and managed in an open access environment. In addition, its low-energy and low-cost design offers an environmentally sustainable technology solution, whilst acting as a critical enabler for new smart services, e-society initiatives, and intelligent lifestyle management. © 2012 IEEE.

German M.,Polytechnic University of Catalonia | Berdun J.,Fundacio I2CAT | Benseny J.,Fundacio I2CAT | Pieklik W.,Poznan Supercomputing and Networking Center | And 2 more authors.
2013 IST-Africa Conference and Exhibition, IST-Africa 2013 | Year: 2013

Availability of high performance telemedicine systems has been for a long time a goal for most Medical Universities and Centers of Excellence. This technological advancement is considered a fundamental asset for those institutions with interest in dissemination of their expertise but also as a way to continuously keep their professionals updated on the most novel techniques. Also, second opinion type of services as well as distantly located collaborative activities in between different medical disciplines may also benefit of this technological solutions, not only in industrialized countries, where network communications are almost guaranteed, but also in developing countries, where these solutions can help improve access to specialized healthcare services. Unfortunately, it has been the case up till now, that the costs of the existing technical solutions with a high level of quality were a barrier for a number of centers. In this paper we present a HIPERMED platform, this platform holds the promise to fundamentally reverse the current state-of-affairs by facilitating access to the high quality telemedicine facilities to networked centers. This can significantly transform both professional-to-professional and professional-to-patient practices, especially in places where the access to technology has a high cost and a high impact like in Africa. Finally, we present a preliminary result above our platform, these results including the performance of the core of the platform. © 2013 The Authors.

Tzanakaki A.,Athens Information Technology | Anastasopoulos M.,Athens Information Technology | Anastasopoulos M.,NDS Group | Georgakilas K.,Athens Information Technology | And 14 more authors.
IEEE Communications Magazine | Year: 2014

This article focuses on planning and replanning of virtual infrastructures over optical cloud infrastructures comprising integrated optical network and IT resources. This concept has been developed in the context of the European project GEYSERS. GEYSERS has proposed a novel multi-layer architecture, described in detail, that employs optical networking capable of provisioning optical network and IT resources for end-to-end cloud service delivery. The procedures required to perform virtual infrastructure planning and replanning at the different architecture layers are also detailed. An optimization scheme suitable to dynamically plan and replan virtual infrastructures is presented and compared to conventional approaches, and the benefits of dynamic replanning are discussed and quantified. The final project demonstration, focusing on planning, replanning, and dynamically establishing virtual infrastructures over the physical resources, is presented, while some emulation results are provided to further evaluate the performance of the GEYSERS solution. © 2014 IEEE.

Szegedi P.,Trans European Research and Education Networking Association | Riera J.F.,Fundacio i2CAT | Garcia-Espin J.A.,Fundacio i2CAT | Hidell M.,KTH Royal Institute of Technology | And 11 more authors.
IEEE Communications Magazine | Year: 2011

The Internet, undoubtedly, is the most influential technical invention of the 20th century that affects and constantly changes all aspects of our day-to-day lives nowadays. Although it is hard to predict its long-term consequences, the potential future of the Internet definitely relies on future Internet research. Prior to every development and deployment project, an extensive and comprehensive research study must be performed in order to design, model, analyze, and evaluate all impacts of the new initiative on the existing environment. Taking the ever-growing size of the Internet and the increasing complexity of novel Internet-based applications and services into account, the evaluation and validation of new ideas cannot be effectively carried out over local test beds and small experimental networks. The gap which exists between the small-scale pilots in academic and research test beds and the realsize validations and actual deployments in production networks can be bridged by using virtual infrastructures. FEDERICA is one of the facilities, based on virtualization capabilities in both network and computing resources, which creates custom-made virtual environments and makes them available for Future Internet Researchers. This article provides a comprehensive overview of the state-of-the-art research projects that have been using the virtual infrastructure slices of FEDERICA in order to validate their research concepts, even when they are disruptive to the test bed's infrastructure, to obtain results in realistic network environments. © 2010 IEEE.

Riera J.F.,Fundacio i2CAT | Hesselbach X.,Polytechnic University of Catalonia | Zotkiewicz M.,Warsaw University of Technology | Szostak M.,Warsaw University of Technology | Botero J.-F.,University of Antioquia
International Conference on Transparent Optical Networks | Year: 2015

The NFV is focused at virtualizing network functions such as gateways, path computing devices, resource allocation mechanisms, proxies, firewalls and transcoders, traditionally carried out by specialized hardware devices, and migrating these functions to software-based appliances. In this paper, an analytic model for the NFV forwarding graph is proposed with the aim to optimize the execution time of the network services deployed. © 2015 IEEE.

Betzler A.,Polytechnic University of Catalonia | Gomez C.,Polytechnic University of Catalonia | Demirkol I.,Fundacio i2CAT | Paradells J.,Fundacio i2CAT
Ad Hoc Networks | Year: 2015

The Constrained Application Protocol (CoAP) has been designed by the Internet Engineering Task Force (IETF) for Internet of Things (IoT) devices. Due to the limited radio channel capacities and hardware resources of such devices, congestion can be a serious problem. CoAP addresses this important issue with a basic congestion control mechanism. CoCoA, an Internet-Draft proposal, introduced alternative congestion control mechanisms for CoAP. Yet, there has been limited evaluation of these congestion control mechanisms in the literature. In this paper, we assess the methods applied in CoCoA in detail and propose improvements to address the shortcomings observed in the congestion control mechanisms. We carry out simulations to compare the congestion control performance for default CoAP, CoCoA, and our new proposal, CoCoA+, in a variety of network topologies and use cases. The results show that CoCoA+ outperforms default CoAP and achieves better results than CoCoA in the majority of considered cases. © 2015 Elsevier B.V.

Aznar J.,Fundacio I2CAT | Escalona E.,Fundacio I2CAT | Canyameres I.,Fundacio I2CAT | Moya O.,Fundacio I2CAT | Vines A.,Fundacio I2CAT
2016 Mediterranean Ad Hoc Networking Workshop, Med-Hoc-Net 2016 - 15th IFIP MEDHOCNET 2016 | Year: 2016

Application service providers (ASPs) now develop, deploy, and maintain complex computing platforms within multiple cloud infrastructures to improve resilience, responsiveness and elasticity of their applications. On the other hand, complex applications have little control and visibility over network resources, and need to use low-level hacks to extract network properties and prioritize traffic. This biased view, limits tenants' flexibility while deploying their applications and prevents them from implementing part of the application logic in the network. In this paper, we propose the CNSMO (CYCLONE Network Services Manager/Orchestrator) tool to bring the innovation at federated cloud environments by bridging these network service capabilities to cloud based services as part of the overall CYCLONE solution. The integration of networking aspects with purely federated clouds, will allow users to request specific infrastructures and manage their dedicated set of coordinated network and IT resources in an easy and transparent way while operating dynamic deployments of distributed applications. © 2016 IEEE.

Batalle J.,Fundacio i2CAT | Riera J.F.,Fundacio i2CAT | Escalona E.,Fundacio i2CAT | Garcia-Espin J.A.,Fundacio i2CAT
SDN4FNS 2013 - 2013 Workshop on Software Defined Networks for Future Networks and Services | Year: 2013

Network Function Virtualization (NFV) has emerged as an operator proposal for offering network services with network functions implemented in software, which may be located in Data Centers, network nodes or even in a virtual machine. NFV is theoretically applicable to any network function and aims at simplifying the management of heterogeneous hardware platforms. Using as a basis one of the network functions offered by network routers, this article presents the analysis, design, and the first implementation, in a virtualized manner, of the routing function. Considering the current co-existence of IPv4 and IPv6 and the possibilities brought into the arena by OpenFlow-enabled infrastructures, the article describes the design of the virtualized routing protocol, enabling a simple management and avoiding signaling messages overhead in the control plane level, and the different scenarios considered to validate the virtualized function. In essence, the manuscript describes one of the first implementations of the functional NFV concept, through the virtualization of the routing function over an OpenFlow network. The different scenarios validated in the article are used to demonstrate the applicability of the NFV-powered implementation proposed into actual production environments.

Riera J.F.,Fundacio i2CAT | Escalona E.,Fundacio i2CAT | Batalle J.,Fundacio i2CAT | Garcia-Espin J.A.,Fundacio i2CAT | Figuerola S.,Fundacio i2CAT
2013 International Conference on Smart Communications in Network Technologies, SaCoNeT 2013 | Year: 2013

Virtualisation of both IT and network resources is a well-known research topic in the Future Internet environment. Most of the work performed on virtualisation has been focused on virtual infrastructure planning or embedding, or on the realisation of the virtualisation itself. However, management of virtualised network environments has not been deeply included into the research studies. We present an example of management platform of virtual infrastructures built over the open-source framework OpenNaaS. In detail, our use case presents a management platform for the Logical Infrastructure Composition Layer software built within the EC GEYSERS project. This software is responsible for virtual infrastructure provisioning composing resources from different infrastructure providers. © 2013 IEEE.

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