Publications

You can download the following documents, made available from the iTETRIS project. Visit this section periodically to get new publications.

• Journal & Magazine Publications
• Conference Publications
• Contributions to Standars
• Project Dissemination Material

Journal & Magazine Publications

• Oscar Lázaro. “Roads to the Future”. ITS Traffic Technology International Magazine, October/November 2010. Download Article

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• M. Rondinone. “iTETRIS: The Integrated Wireless and Traffic Simulation Platform for Real-Time Road Traffic Management Solutions”. COMeSafety Newsletter, Issue 8, January 2010.
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• O. Lazaro, E. Robert. “iTETRIS: The Simulation Platform to Valorise Cooperative ITS in Effective Traffic Management”. ITS Traffic Technology International Magazine, August/September 2009.
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Conference Publications

• D. Borsetti, J. Gozalvez. “Infrastructure-Assisted Geo-Routing for Cooperative Vehicular Networks”. Proceedings of the 2nd IEEE (*) Vehicular Networking Conference (VNC 2010), 13-15 December 2010, New Jersey (USA). View Abstract and Download Paper

  Cooperative vehicular systems require the design of reliable and efficient multi-hop networking protocols to achieve their foreseen benefits. Although many geo-routing protocols have been proposed in the literature, few contributions have analysed the benefits that road side infrastructure units could provide to successfully route data from source to destination. In this context, this paper proposes a novel infrastructure-assisted routing approach designed to improve the end-to-end performance, range and operation of multi-hop vehicular communications by exploiting the reliable interconnection of infrastructure units. The conducted investigation shows that the proposed infrastructureassisted routing approach achieves its objectives, and reduces the routing overhead compared to other greedy position-based geo-routing protocols. Finally, the paper shows that to obtain the maximum benefits from the proposed infrastructure-assisted routing approach, optimal infrastructure deployment strategies must be further investigated.

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• M. Sepulcre, J. Gozalvez, J. Härri, H. Hartenstein. “Application-Based Congestion Control Policy for the Communication Channel in VANETs”. IEEE (*) Communications Letters, vol. 14, no. 10, pp. 951-953, October 2010. View Abstract and Download Paper

  This letter proposes a novel proactive congestion control policy for vehicular ad-hoc networks, in which each vehicle’s communication parameters are adapted based on their individual application requirements. Contrary to other approaches, where transmission resources tend to be assigned based on system-level performance metrics, the technique proposed in this paper aims to individually satisfy the target application performance of each vehicle, while globally minimising the channel load to prevent channel congestion.

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• D. Krajzewicz, R. Blokpoel, F. Cartolano, P. Cataldi, A. Gonzalez, O. Lazaro, J. Leguay, L. Lin, J. Maneros, M. Rondinone. “iTETRIS - A System for the Evaluation of Cooperative Traffic Management Solutions”. 14th International Forum on Advanced Microsystems for Automotive Applications (AMAA 2010), 10-11 May 2010, Berlin (Germany).



• Michelle Wetterwald, Fatma Hrizi, Pasquale Cataldi. “Cross-layer Identities Management in ITS Stations”. ITS-T 2010, 9-11 November 2010, Kyoto (Japan). View Abstract and Download Paper

  Our lives are going to evolve dramatically in the coming years due to the recent explosion of mobile communications. Intelligent Transport Systems and vehicular networks are one of the resulting vertical applications that are currently being designed and standardized. They are built on the concept of the ITS station, a common reference model inspired from the OSI standard. A first set of operational tests is currently being started or executed, leading to a near future deployment and the emergence of this new type of networks. The need for a comprehensive study of the cross-layer identity management, which constitutes a fundamental element of the ITS architecture, motivated the investigation presented here. In this paper, we analyze the major requirements and constraints that are weighing on the station identity, among which are the privacy considerations and the operational compatibility with the safety applications and communications. In a second step, we define a cross-layer framework that fulfils these requirements and analyze, layer by layer, how an ITS station can be uniquely and safely identified, whether it is a moving station such as a car or a bus, or a static station such as a roadside or central station. When needed, we propose our solutions to the issues that have not yet been completely covered. Some of these proposals have been transferred into ETSI standards and will be tested in the upcoming Field Operational Tests.

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• R. Bauza, J. Gozalvez, J. Sanchez-Soriano. “Road Traffic Congestion Detection through Cooperative Vehicle-to-Vehicle Communications”. 4th IEEE (*) LCN Workshop On User MObility and VEhicular Networks (ON-MOVE), 11-14 October 2010, Denver, Colorado (USA). View Abstract and Download Paper

  Cooperative vehicular systems are being developed to improve traffic safety and management. Reducing road traffic congestion can be achieved through effective management strategies. In this sense, mechanisms for its rapid and accurate detection that allow evaluating the road network performance are crucial. Current Intelligent Transportation Systems (ITS) require the deployment of infrastructure sensors to monitor traffic conditions. Their installation is often expensive and their capability to provide accurate traffic information is limited. In this context, this paper proposes CoTEC (COperative Traffic congestion detECtion), a novel cooperative technique based on Vehicle-to-Vehicle (V2V) communications and fuzzy logic to detect road traffic congestion without the need to deploy infrastructure sensors. The proposed technique is also capable to accurately detect the traffic congestion intensity and length.

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• Michele Rondinone, Javier Gozálvez. “Detección Distribuida de la Conectividad en Redes Ad-hoc de Comunicaciones Vehiculares”. IX Jornadas de Ingeniería Telemática (JITEL), 29 September - 1 October 2010, Valladolid (Spain). View Abstract and Download Paper

  Estudios recientes han demostrado que las prestaciones de los protocolos de enrutamiento en redes vehiculares pueden mejorarse mediante la utilización de información dinámica sobre las condiciones de tráfico. Dicha información puede emplearse para seleccionar los caminos de enrutamiento o nodos retransmisores más apropiados. Sin embargo, la mayoría de las técnicas de estimación de las condiciones de tráfico causan una importante sobrecarga en el canal radio lo cual puede comprometer su futura viabilidad. En este contexto, este artículo introduce y evalúa DiRCoD, una novedosa técnica para estimar la conectividad multi-hop de segmentos de carretera que permite obtener la capacidad de estos segmentos para enrutar de manera fiable paquetes de datos. Como se demostrará en el artículo, esta técnica es capaz de proporcionar información de conectividad con gran periodicidad, sin incurrir en un elevado incremento de la sobrecarga de señalización y con un bajo coste de implementación.

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• Michele Rondinone, Javier Gozálvez. “Distributed and Real Time Communications Road Connectivity Discovery through Vehicular Ad-hoc Networks”. International IEEE (*) Conference on Intelligent Transportation Systems (ITSC), 19-22 September 2010, Madeira Island (Portugal). View Abstract and Download Paper

  Recent studies have demonstrated that the performance of routing protocols in vehicular networks can be improved by using dynamic road traffic information to select the most appropriate forwarding paths or nodes. However, most of the techniques to estimate such traffic conditions imply an important communications overhead that compromises their future viability. In this context, this paper introduces and evaluates DiRCoD, a novel technique to estimate the multi-hop connectivity of road segments, and hence their capability to reliably forward data packets through multi-hop communications. As the paper will demonstrate, this technique is capable to provide such connectivity information with a high periodicity, and low overhead and implementation cost.

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• Robbin J. Blokpoel, Daniel Krajzewicz and Ronald Nippold. “Unambiguous metrics for evaluation of traffic networks”. International IEEE (*) Conference on Intelligent Transportation Systems (ITSC), 19-22 September 2010, Madeira Island (Portugal). View Abstract and Download Paper

  This paper presents an extensive set of unambiguous metrics that can be used for evaluation of new ITS applications. Currently in the literature most authors define their own metrics and small differences in definitions can lead to confusion when comparing the results. To derive the set of metrics presented in this paper, several steps have been taken. First, a list has been made with all metrics known by the research partners. Afterwards, a set of base measures has been defined. Using that set, clear formulas for all metrics have been derived and are reported in this paper. Finally, an application example about a cooperative traffic light controller is given.

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• Marina Aguilera Leal, Matthias Röckl, Bernhard Kloiber, Fabian de Ponte Müller and Thomas Strang. “Information-Centric Opportunistic Data Dissemination in Vehicular Ad Hoc Networks”. International IEEE (*) Conference on Intelligent Transportation Systems (ITSC), 19-22 September 2010, Madeira Island (Portugal). View Abstract and Download Paper

  This paper addresses the problem of efficient data dissemination in Vehicular Ad Hoc Networks (VANETs), which particularly suffer from changing densities in the network topology due to congested and sparse traffic on the roads. We present a new network layer protocol in the family of geographic network protocols, which makes use of distance and time information following a dissemination strategy to efficiently distribute messages adapting to the varying densities in VANETs. We have evaluated the protocol in different road density scenarios and its performance has been proved in comparison to two other recent protocols of the art.

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• Michelle Wetterwald. “iTETRIS: The Integrated Wireless and Traffic Platform for Real-Time Road Traffic Management Solutions”. ETSI TC ITS WG3, 1st July 2010, Trondheim (Norway).
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• Thomas Strang, Matthias Röckl. “Context-Awareness in Car-to-Car Communications on the example of iTETRIS”. Workshop on Context-awareness in Smart Environments as part of the Future Network & Mobile Summit 2010, 15th June 2010, Florence (Italy).
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• Matthias Röckl, Patrick Robertson. “Data Dissemination in Cooperative ITS from an Information-centric Perspective”. IEEE (*) International Conference on Communications (ICC), 23-27 May 2010, Cape Town (South Africa).
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  The success of cooperative Intelligent Transportation Systems (ITS) applications such as collision avoidance or adaptive cruise control stands or falls with the exchange of information between distributed and usually moving nodes. The extensive transmission of information contrasts with a limited channel bandwidth which has to be shared between all nodes. Thus, a tradeoff is required which cooperatively selects pieces of information for dissemination according to their worth for the receivers under consideration of the communication channel conditions.

  The tradeoff is achieved by an entropy-based evaluation of evidence in a dynamic probabilistic filter system. With this approach the dissemination priority is based on the uncertainty reduction which can be achieved by the reception of a piece of evidence in contrast to a pure prediction. The novelty of the approach as presented in this paper is exceptional due to its information-centric evaluation of the worth of evidence which has not been performed so far for cooperative ITS applications. It outperforms current state of the art by its generic and theoretically grounded approach for diverse applications, its inclusion of measurement uncertainty, its context-adaptability and its optimized cooperative radio bandwidth utilization.

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• Vineet Kumar , Lan Lin , Daniel Krajzewicz, Fatma Hrizi, Oscar Martinez, Javier Gozalvez, Ramon Bauza. "iTETRIS: Adaptation of ITS Technologies for Large Scale Integrated Simulation". 3rd IEEE (*) International Symposium on Wireless Vehicular Communications: IEEE WiVEC 2010, 16–17 May 2010, Taipei, Taiwan.
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  The European Union (EU) Framework Program 7 (FP7) funded project, iTETRIS (An Integrated Wireless and Traffic Platform for Real-Time Road Traffic Management Solutions) targets to extend state of art in simulation of wireless vehicular cooperative systems for evaluation of road traffic management services and applications. In particular, iTETRIS addresses four important and distinct challenges: (a) road traffic and wireless integrated open-source simulation platform, (b) large scale trials, (c) realistic Vehicle to Vehicle (V2V) and Vehicle to Infrastructure (V2I) communication simulation and (d) dynamic, distributed and self-autonomous Intelligent Transport Systems (ITS) applications based on cooperative systems. iTETRIS will provide a standard compliant, open-source integrated communication and traffic platform suited for large scale scenario simulation.

  This Paper addresses extension of traffic simulator being used in iTETRIS, scalability studies of networking simulator, which have been achieved as project results. Further the paper presents the adaptation of the Intelligent Communications for Transport Systems (ICTS) reference architecture functionalities being developed by the European Telecommunication Standard Institute (ETSI) at its Technical Committee (TC) on ITS.

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• Julen Maneros, Ramón Bauzá, Michele Rondinone, Javier Gozálvez, Oscar Lázaro, Ainara González. "Plataforma Modular para la Integración de Herramientas de Simulación de Comunicaciones Inalámbricas y Movilidad Urbana en la Evaluación de Sistemas Cooperativos ITS a Gran Escala". X Congreso ITS España, 11-13 May 2010, Madrid, Spain.
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  La plataforma iTETRIS combina e integra dos herramientas, una dedicada a la simulación de tráfico y otra destinada a la simulación de redes inalámbricas, lo cual permite analizar de forma realista y escalable el impacto de la utilización de tecnologías cooperativas de comunicaciones V2V y V2I en la gestión del tráfico. El presente artículo presenta la plataforma iTETRIS, y el proceso que ha llevado a su arquitectura final. Seguidamente discute cómo se realiza la conexión entre los componentes que permiten una simulación eficiente y precisa de las soluciones ITS cooperativas a gran escala. Finalmente, muestra el proceso de simulación que integra los beneficios de ambos simuladores con un alto grado de rendimiento. El diseño de iTETRIS habilita la evaluación de sistemas cooperativos ITS basando su implementación en la arquitectura europea de comunicaciones definida por ETSI.

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• Michelle Wetterwald, Jérémie Leguay. "iTETRIS: The Integrated Wireless and Traffic Platform for Real-Time Road Traffic Management Solutions". 2nd ETSI TC ITS Workshop, 10-12 February 2010, Sophia-Antipolis (France).
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• M. Rondinone, O. Lazaro, C. Michelacci, D. Krajzewicz, R. Blokpoel, J. Maneros, L. Lin, F. Hrizi, J. Leguay. "Investigating the Efficiency of ITS Cooperative Systems for a Better Use of Urban Transport Infrastructures: The iTETRIS Simulation Platform". 2009 Annual POLIS Conference, 10th to 11th December 2009, Brussels (Belgium). View Abstract and Download Paper

  Innovative cooperative ITS solutions adopting wireless communication between vehicles (V2V) and between vehicles and infrastructure (V2I) are considered by many experts a way to satisfy the increasing demand for urban road mobility by exploiting the exceeding dormant capacity residing in existing infrastructures. Although strongly promoted by industry and standardization bodies, traffic strategies employing V2X systems are asked by road traffic authorities to demonstrate solid evidence of their effectiveness and clear justification of their implementation costs. The EC FP7 iTETRIS consortium is aimed at developing a combined radio and traffic simulation platform to analyze applications of such strategies in very realistic scenarios and provide an answer to the aforementioned issues. As a reliable simulation tool, iTETRIS may be used in a near future by road traffic authorities to test cooperative ITS traffic management policies before investing money for their implementation or to simulate optimization strategies through different exploitations of pre-existing ITS systems. As a result of this, traffic authorities will be able to generate the most suitable and convenient solutions for a cleaner, faster, safer, and in general more efficient urban mobility of people and goods. In this paper, besides describing how iTETRIS can achieve its objectives, considerations on the real world use cases and scenarios considered in the project are illustrated.

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• Ronald Nippold, Daniel Krajzewicz. "iTETRIS: The Integrated Wireless and Traffic Platform for Real-Time Road Traffic Management Solutions".NEARTICS Workshop, 13th November 2009, London (UK).
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• M. Röckl, O. Lazaro. "iTETRIS: Large Scale Simulation Platform for Cooperative ITS. Scenarios, Architecture and First Performances". Car2Car Forum 2009, 3rd to 4th November 2009. Wolfsburg (Germany).
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• R. Bauza, J. Hernandez, J. Gozalvez, S. Vaz, D. Valiente, I. Aguado and A. Gonzalez. "iTETRIS Heterogeneous Wireless Communication Platform for the Large-Scale Evaluation of Cooperative Road Traffic Management Policies". ITS-T 2009, 20th to 22nd October 2009, Lille (France).
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  Cooperative vehicular communications are being developed to improve road safety and traffic management by assisting drivers and road authorities with real-time and comprehensive traffic information. In the study of such systems, large-scale simulation research has been identified as a necessary resource to realistically evaluate cooperative vehicular systems and traffic management policies in city-sized scenarios. In this context, this paper presents the iTETRIS multi-technology wireless simulation platform aimed at providing an optimally, efficiently and well-designed framework for the evaluation of vehicular communications and its potential impact on traffic efficiency. Given the importance of accurately modeling the wireless communication link in simulation researches, this paper also focuses on the modeling and characterization of the 802.11p physical layer by means of link-level simulations.

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• J. Maneros, M. Rondinone, A. Gonzalez, R. Bauza, D. Krajzewicz. "iTETRIS Platform Architecture for the Integration of Cooperative Traffic and Wireless Simulations". ITS-T 2009, 20th to 22nd October 2009, Lille (France).
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  The use of cooperative wireless communications can support driving through dynamic exchange of Vehicle-to-Vehicle (V2V) and Vehicle-to-Infrastructure (V2I) messages. Traffic applications based on such systems will be able to generate a safer, faster, cheaper and cleaner way for people and goods to move. In this context, the iTERIS project aims at providing the framework to combine traffic mobility and wireless communication simulations for large scale testing of traffic management solutions based on cooperative systems. This paper addresses the description and explanation of the implementation choices taken to build a modular and interoperable architecture integrating heterogeneous traffic and wireless simulators, and application algorithms supporting traffic management strategies. The functions of an “in-between” control system for managing correct simulation executions over the platform are presented. The inter-block interaction procedures identified to ensure optimum data transfer for simulation efficiency are also introduced.

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• V. Kumar, R. Bauza, F. Filali, J. Gozalvez, L. Lin, M. Rondinone. "iTETRIS - A Large Scale Integrated Simulation Platform for V2X Communications: Application to Real-Time Traffic Management". ITS-T 2009, 20th to 22nd October 2009, Lille (France).
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  With the identification of cooperative vehicular communication as an encouraging solution to real time traffic management problems, there has been efforts in evaluating more efficient communication technologies and applications. Field operational tests (FOTs) exist and provide precise evaluation tools but they have limitations. It is impractical to imagine evaluation of large scale city like scenarios with thousands of vehicles by conducting FOTs. This converges to the need of large scale advanced simulation platforms. This paper in context of the ongoing EU project iTETRIS, addresses issues concerning realization of a large scale integrated traffic and communication simulation platform within realistic traffic scenarios with objectives of evaluating different management strategies. Further, the paper aims to demonstrate the design methodology of iTETRIS integrated vehicular traffic management simulation platform with regards to achieving its goals in terms of its scalability requirements and targeted capabilities.

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• Fatma Hrizi, Fethi Filali. "On Congestion-Aware Broadcasting in V2X Networks". International Workshop on Communication Technologies for Vehicles, 13th to 14th October 2009, Saint-Petersburg (Russia).
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  Due to the dramatic increase in the number of accidents all over the world, a rapid emergence of wireless vehicular networks has been perceived in the last few years, particularly, aiming at improving safety and efficiency in the road. Such applications require broadcast communications to disseminate emergency information in brief delay for all the vehicles in the area of danger. Designing an efficient broadcast scheme is crucial. For this reason, a large variety of approaches have been proposed.

  In this paper, we present a survey on various efforts for designing suitable multi-hop message dissemination schemes for vehicular systems especially which have been focused on reducing channel congestion. Furthermore, we propose a comparison of message dissemination proposals. Their performance evaluation and their advantages and limitations are also highlighted.

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• O. Lazaro, E. Robert, J. Gozalvez, F. Cartolano, L. Lan, S. Turksma, F. Filali, M. A. Urrutia, M. Röckl. "iTETRIS: Scenarios for Simulation of Real-Time Road Traffic Management Solutions over Integrated Wireless Communication and Traffic Platforms". ITS World Congress 2009, 22nd to 25th September 2009. Stockholm (Sweden). View Abstract and Download Paper

  Wireless vehicular cooperative systems are an attractive solution to improve road traffic management. V2V-V2I communication technologies can improve traffic management through real-time exchange of data among vehicles and with road infrastructure. Field Operational Tests will get first insights into the benefits and problems faced by such cooperative traffic management strategies; there is yet the need to evaluate in long term and large dimension the traffic efficiency improvements. iTETRIS will be the first tool capable of addressing such dimensions. The aim of this paper is to present in detail the traffic management scenarios and strategies that will be supported by iTETRIS

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• Javier Gozalvez, Siebe Turksma, Lin Lan, Oscar Lazaro, Fabio Cartolano, Eric Robert, Daniel Krajzewicz, Ramon Bauza, Fethi Filali, et. al. "iTETRIS: The Framework for Large-Scale Research on the Impact of Cooperative Wireless Vehicular Communications Systems in Traffic Efficiency". ICT-MobileSummit , 10-12 June 2009, Santander, Spain.
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  Cooperative vehicular ICT systems have been identified as an attractive technology to improve traffic management and safety, while providing Internet on the move. To achieve these objectives, cooperative vehicular communication systems allow the dynamic exchange of messages between vehicles, and between vehicles and infrastructure. To ensure the efficiency of cooperative vehicular ICT systems, it is crucial that the communication protocols are adequately designed and optimised, and that the applications using such communication capabilities are tested under realistic conditions. In this context, this paper presents the EU-funded iTETRIS platform that is being created to allow for a realistic and accurate evaluation of the design and impact of cooperative vehicular communication systems and traffic management policies under realistic large-scale scenarios.

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• Ramón Bauzá, Julen Maneros, Miguel Sepulcre, Javier Gozálvez, Oscar Lázaro, Ainara González. "iTETRIS: Plataforma Europea para el Análisis del Impacto de Sistemas ITS Cooperativos en la Gestión De Tráfico (Spanish only)" . IX Congreso ITS España, 02-04 June 2009, Andorra La Vella, Spain.
  
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  Los sistemas cooperativos ITS vehiculares han sido identificados como una atractiva tecnología para mejorar la gestión del tráfico y la seguridad vial, además de proporcionar acceso a Internet en movimiento. Para conseguir estos objetivos, los sistemas de comunicaciones vehiculares permiten el intercambio dinámico de mensajes entre vehículos, y entre vehículos e infraestructura. Para garantizar la eficiencia de los sistemas cooperativos ITS vehiculares, es crucial que los protocolos de comunicación sean adecuadamente diseñados y optimizados, y que las aplicaciones que emplean dichos sistemas sean evaluadas en condiciones realistas. En este contexto, este trabajo presenta la plataforma iTETRIS financiada por el 7º Programa Marco y que está siendo desarrollada para permitir la evaluación realista y precisa del diseño e impacto de los sistemas cooperativos de comunicaciones vehiculares y de las políticas de gestión de tráfico en escenarios realistas a gran escala.

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• R. Bauza, J. Gozalvez, M. Sepulcre. "ns-3 Scalability Constraints In Heterogeneous Wireless Simulations: iTETRIS A Case Study". Workshop on ns-3, 2nd March 2009, Rome, Italy.
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• O. Lazaro, E. Robert, L. Lan, J. Gozalvez, S. Turksma, F. Filali, F. Cartolano, M. A. Urrutia, D. Krajzewicz. "iTETRIS: An Integrated Wireless and Traffic Platform for Real-Time Road Traffic Management Solutions". 21st WWRF 2008, 13-15 October, Stockholm, Sweden.
  
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  Wireless vehicular cooperative systems have been identified as an attractive solution to improve road traffic management, thereby contributing to the European goal of safer, cleaner, and more efficient and sustainable traffic solutions. V2V-V2I communication technologies can improve traffic management through real-time exchange of data among vehicles and with road infrastructure. It is also of great importance to investigate the adequate combination of V2V and V2I technologies to ensure the continuous and cost-efficient operation of traffic management solutions based on wireless vehicular cooperative solutions. However, to adequately design and optimize these communication protocols and analyze the potential of wireless vehicular cooperative systems to improve road traffic management, adequate testbeds and Field Operational Tests (FOTs) need to be conducted.

  Despite the potential of Field Operational Tests to get the first insights into the benefits and problems faced in the development of wireless vehicular cooperative systems, there is yet the need to evaluate in the long term and large dimension the true potential benefits of wireless vehicular cooperative systems to improve traffic efficiency. To this aim, iTETRIS is devoted to the development of advanced tools coupling traffic and wireless communication simulators.

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Contributions to Standards

• Michelle Wetterwald. “Contribution to Facilities Communication Management”. ETSI TC ITS WG1.

Project Dissemination Material

• Project FactsheetDownload Leaflet

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• Commercial LeafletDownload Leaflet

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• Final LeafletDownload Leaflet

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• iTETRIS is a project funded by the European Commision (7th Framework Programme)

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