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  • 1.
    Chisalita, Ioan
    Linköping University, Department of Computer and Information Science, IISLAB. Linköping University, The Institute of Technology.
    Communication and Networking Techniques for Traffic Safety Systems2006Doctoral thesis, monograph (Other academic)
    Abstract [en]

    Accident statistics indicate that every year a significant number of casualties and extensive property losses occur due to traffic accidents. Consequently, efforts are directed towards developing passive and active safety systems that help reduce the severity of crashes, or prevent vehicles from colliding with one another. To develop these systems, technologies such as sensor systems, computer vision and vehicular communication have been proposed. Safety vehicular communication is defined as the exchange of data between vehicles with the goal of providing in-vehicle safety systems with enough information to permit detection of traffic dangers. Inter-vehicle communication is a key safety technology, especially as a complement to other technologies such as radar, as the information it provides cannot be gathered in any other way. However, due to the specifics of the traffic environment, the design of efficient safety communication systems poses a series of major technical challenges.

    In this thesis we focus on the design and development of a safety communication system that provides support for active safety systems such as collision warning and collision avoidance. We begin by providing a method for designing the support system for active safety systems. Within our study, we investigate different safety aspects of traffic situations. For performing traffic investigations, we have developed ECAM, a temporal reasoning system for modeling and analyzing accident scenarios.

    Next, we focus on the communication system design. We investigate approaches that can be applied to implement safety vehicular communication, as well as design aspects of such systems, including networking techniques and transmission procedures. We then propose a new solution for vehicular communication in the form of a distributed communication protocol that allows the vehicles to organize themselves in virtual clusters according to their common interest in traffic safety. To disseminate the information used for organizing the network and for assessing dangers in traffic, we develop an anonymous context-based broadcast protocol. This protocol requires the receivers to determine whether they are the intended destination for sent messages based on knowledge about their current situation in traffic. This communication system is then augmented with a reactive operation mode, where warnings can be issued and forwarded by vehicles. A vehicular communication platform that provides an implementation framework for the communication system, and integrates it within a vehicle, is also proposed. Experiments have been conducted, under various conditions, to test communication performance and the system’s ability to reduce accidents. The results indicate that that the proposed communication system can efficiently provide the exchange of safety information between vehicles.

  • 2.
    Chisalita, Ioan
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Safety-oriented communication in mobile networks for vehicles2004Licentiate thesis, monograph (Other academic)
    Abstract [en]

    Accident statistics indicate that every year a large number of casualties and extensive property losses are recorded due to traffic accidents. Consequently, efforts are directed towards developing passive and active safety systems that help reducing the severity of crashes or prevent vehicles to collide with each other. Within the development of these systems, technologies such as sensor systems, computer vision and vehicular communication are considered of importance. Vehicular communication is defined as the exchange of data between vehicles, and is considered a key technology for traffic safety due to its ability to provide the vehicles with information that cannot be acquired using other means (e.g. radar and video systems). However, due to the current early stage in the development of in-vehicle safety systems, the applicability of communication for improving traffic safety is still an open issue. Furthermore, due to the specificity of the environment in which vehicles travel, the design of communication systems that provide an efficient exchange of safety-related data between vehicles poses a series of major technical challenges.

    In this thesis we focus on the development of a communication system that provides support for in-vehicle active safety systems such as collision warning and collision avoidance.

    We begin by studying the applicability of communication for supporting the development of effective active safety systems. Within our study, we investigate different safety aspects of traffic situations. For performing such investigations we develop ECAM, a temporal reasoning system for modeling and analyzing accident scenarios. This system gives us the possibility of analyzing relations between events that occur in traffic and their possible consequences. We use ECAM for analyzing the degree of accident prevention that can be achieved by applying crash countermeasures based on communication in specific traffic scenarios.

    By acknowledging the potential of communication for traffic safety, we further focus in the thesis on the design of a safety-oriented vehicular communication system. We propose a new solution for vehicular communication in the form of a distributed communication protocol that allows the vehicles to organize the network in an ad-hoc decentralized manner. For disseminating information, we develop an anonymous context-based broadcast protocol that requires the receivers to determine whether they are the intended destination of sent messages based on knowledge about their momentary situation in traffic. We further design a vehicular communication platform that provides an implementation framework for the communication system, and integrates it within a vehicle. Investigations of the communication performances, which evaluate metrics such as transmission delay, send errors, packet collisions and information filtering, indicate that the proposed vehicular communication system is able to provide a reliable and timely exchange of data between vehicles.

  • 3.
    Chisalita, Ioan
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems.
    Shahmehri, Nahid
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems.
    A context-based vehicular communication protocol2004In: IEEE Personal, Indoor and Mobile Radio Communication Symposium,2004, Barcelona, Spain: IEEE PIMRC , 2004, p. 2820-Conference paper (Refereed)
  • 4.
    Chisalita, Ioan
    et al.
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Shahmehri, Nahid
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    A novel architecture for supporting vehicular communication2002In: IEEE 56th Vehicular Technology Conference, 2002, p. 1002-1006Conference paper (Refereed)
    Abstract [en]

    In today's world, traffic safety is a major problem. Traffic accidents result in more than half a million casualties each year and are associated with serious injuries and extensive material losses. Therefore, special attention is given to those technologies that can reduce the number and severity of road events. Inter-vehicle communication (IVC) and vehicle to road communication (VRC) are considered to have extensive potential for the development of efficient safety systems installed in vehicles. This paper proposes a novel, safety-oriented communication platform dedicated to supporting the exchange of safety-relevant information between traffic participants. The vehicular communication platform (VCP) aims to support a specific vehicular communication mechanism previously designed by the authors and briefly presented in the paper.

  • 5.
    Chisalita, Ioan
    et al.
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Shahmehri, Nahid
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    A peer-to-peer approach to vehicular communication for the support of traffic safety applications2002In: 5th IEEE Conference on Intelligent Transportation Systems, 2002, p. 336-341Conference paper (Refereed)
    Abstract [en]

    More than half a million casualties are due to traffic accidents each year. Therefore, there is a high demand for innovative technologies focused on collision warning and collision avoidance. Among such technologies, the inter-vehicle communication and the vehicle-to-road communication are considered to have extensive potential for supporting the safety systems located within a vehicle. In this paper we propose a new approach to vehicular communication. We designed a safety-oriented vehicular communication, built around the concept of mobile ad-hoc peer-to-peer (P2P) networking. The merging between ad-hoc connectivity and P2P paradigm facilitates the development of a vehicular network characterized by self-organization, fault-tolerance, scalability, shareable resources and services, cooperation, cases of interconnection and cost efficiency. These characteristics recommend the communication proposed here as an efficient method for providing safety-relevant data for safety systems installed in vehicles.

  • 6.
    Chisalita, Ioan
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, Database and information techniques.
    Shahmehri, Nahid
    Linköping University, Department of Computer and Information Science, Database and information techniques. Linköping University, The Institute of Technology.
    Adaptive dissemination of safety data among moving vehicles2006In: 17th IEEE Personal, Indoor and Mobile Radio Communication Symposium,2006, Helsinki, Finland: IEEE , 2006Conference paper (Refereed)
  • 7.
    Chisalita, Ioan
    et al.
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Shahmehri, Nahid
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    An In-Vehicle Approach for Improving Traffic Safety through GIS Utilization2002In: Proceedings of the IEEE International Conference on Systems, Man and Cybernetics. 2002, 2002Conference paper (Refereed)
    Abstract [en]

    This paper focuses on the utilization and integration of geographic information systems (GIS) oriented to tragic safety in vehicles. We have primarily analyzed the benefits of introducing GIS systems that support the driver and provide processed data to collision warning and collision avoidance systems located in vehicles. Further on, we have defined a set of information that is relevant for traffic safety and appropriate to be used within an in-vehicle GIS system. Based on these data, we propose in this paper a specific design for the GIS system. This system integrates the relevant data for traffic safety and takes into consideration the specific requirements of the vehicular domain. The integration of the GIS system within vehicles introduces a series of problems that are discussed in the paper.

  • 8.
    Chisalita, Ioan
    et al.
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Shahmehri, Nahid
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    An in-vehicle approach for improving traffic safety through GIS utolization2002In: IEEE International Conference on Systems, Man and Cybernetics, 2002, p. 9-11Conference paper (Refereed)
  • 9.
    Chisalita, Ioan
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, Database and information techniques.
    Shahmehri, Nahid
    Linköping University, Department of Computer and Information Science, Database and information techniques. Linköping University, The Institute of Technology.
    Emergency information dissemination in mobile networks for vehicles2006In: International Conference on Wireless Information Networks and Systems, part of the 3rd International Joint Conference on e-Business and Telecommunications,2006, Setubal, Portugal: WINSYS/ICETE , 2006Conference paper (Refereed)
  • 10.
    Chisalita, Ioan
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, Database and information techniques.
    Shahmehri, Nahid
    Linköping University, Department of Computer and Information Science, Database and information techniques. Linköping University, The Institute of Technology.
    On the design of safety communication systems for vehicles2007In: IEEE transactions on systems, man and cybernetics. Part A. Systems and humans, ISSN 1083-4427, E-ISSN 1558-2426, Vol. 37, no 6, p. 933-945Article in journal (Refereed)
    Abstract [en]

    Statistics show that the number of casualties due to traffic accidents exceeds one million each year. For the development of systems that prevent vehicle collisions, vehicular communication is considered a promising technology. This paper focuses on design aspects of communication systems that support the development of collaborative active safety systems such as collision warning and collision avoidance. We introduce a design method for safety communication systems that includes a set of analyses and a reasoning system for modeling and analyzing traffic scenarios. An overview of a specific solution for communication is presented in this paper. This solution proposes techniques for network organization and data dissemination that make use of contextual information. This allows the development of a communication system that is adaptable to the specifics of the traffic situation. © 2007 IEEE.

  • 11.
    Chisalita, Ioan
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, Database and information techniques.
    Shahmehri, Nahid
    Linköping University, Department of Computer and Information Science, Database and information techniques. Linköping University, The Institute of Technology.
    Performance evaluation of safety communication for vehicles2006In: 3rd International Symposium on Wireless Information Systems,2006, Valencia, Spain: ISWCS/ IEEE , 2006Conference paper (Refereed)
  • 12.
    Chisalita, Ioan
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems.
    Shahmehri, Nahid
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems.
    Vehicular communication - A candidate technology for traffic safety2004In: 2004 IEEE International Conference on Systems, Man and Cybernetics,2004, IEEE SMC , 2004, p. 3903-Conference paper (Refereed)
  • 13.
    Chisalita, Ioan
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems.
    Shahmehri, Nahid
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems.
    Lambrix, Patrick
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems.
    Traffic accidents modeling and analysis using temporal reasonin2004In: ITSC 2004: 7TH INTERNATIONAL IEEE CONFERENCE ON INTELLIGENT TRANSPORTATION SYSTEMS, PROCEEDINGS, Institute of Electrical and Electronics Engineers (IEEE), 2004, p. 378-383Conference paper (Refereed)
    Abstract [en]

    Traffic accidents account for more than half a million casualties every year. The analysis of accidents helps identifying the elements that affect traffic conditions, the relationships between them, and how they may contribute to the occurrence of dangerous situations. In this paper we present a temporal reasoning system for modeling and analyzing various types of accident scenarios. The system is based on Event Calculus and was implemented using Prolog. We exemplify the use of the system by applying it for modeling and analyzing a rear-end accident scenario.

  • 14.
    Shahmehri, Nahid
    et al.
    Linköping University, Department of Computer and Information Science, Database and information techniques. Linköping University, The Institute of Technology.
    Chisalita, Ioan
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, Database and information techniques.
    Åberg, Johan
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, Database and information techniques.
    People with Special Needs and Traffic Safety2008In: The Engineering Handbook of Smart Technology for Aging, Disability and Independence / [ed] Abdelsalam (Sumi) Helal, Mounir Mokhtari, Bessam Abdulrazak, USA: Wiley , 2008, 1, p. -944Chapter in book (Other academic)
    Abstract [en]

    An advanced look at smart technology to promote the independence of the elderly and disabled

    Ongoing research and advancements in technology are essential for the continuing independence of elderly and disabled persons. The Engineering Handbook of Smart Technology for Aging, Disability, and Independenceprovides a thorough analysis of these technologies and the needs of the elderly and disabled, including a breakdown of demographics, government spending, growth rate, and much more.

    Each chapter is written by an expert in his or her respective field, and gives readers unparalleled insight into the research and developments in a multitude of important areas, including:

    • User-need analyses, classifications, and policies
    • Assistive devices and systems for people with motor disabilities
    • Assistive devices and systems for people with visual and hearing impairments
    • Human-machine interaction and virtual reality
    • Assistive robotics
    • Technology for user mobility and object manipulation
    • Smart homes as assistant environments
    • A discussion of emerging standards and guidelines to build accessible devices, tools, and environments

    This book is an indispensable resource for researchers and professionals in computer science, rehabilitation science, and clinical engineering. It also serves as a valuable textbook for graduate students in the aforementioned fields.

  • 15.
    Shahmehri, Nahid
    et al.
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Chisalita, Ioan
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Åberg, Johan
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Maciuszek, Dennis
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Hellqvist, Marie
    Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems. Linköping University, The Institute of Technology.
    Using Vehicular Communication to Support Older Drivers at Road Intersections: A Feasibility Study2004In: Proceedings of the 2nd International Conference on Smart homes and health Telematics, Amsterdam, The Netherlands: IOS Press , 2004, p. 33-40Conference paper (Refereed)
    Abstract [en]

    More and more people are living to old age, and it is usually a desire among elderly people to sustain mobility. Unfortunately, the crash rate of older adults is much higher than for other drivers. Older drivers are also more likely to sustain serious injuries that lead to disability or death. Therefore, technological contributions for improving traffic safetyand preserving mobility of older people are important. One promising new approach is to use traffic safety systems based on vehicular communication, where vehicles exchange warning messages. This paper evaluates the feasibility of using such vehicular communication for supporting older drivers in road intersections, which is the most common accident setting for older drivers. Using a temporal reasoning system (ECAM) this accident setting is analysed in depth, and the potential foraccident avoidance is quantified, while taking into account several relevant factors such as speed, driver reaction time, and transmission delay for warning messages. The results indicate the high potential of vehicular communication, and highlight requirements on transmission delay.

  • 16.
    Shahmehri, Nahid
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems.
    Åberg, Johan
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems.
    Maciuszek, Dennis
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems.
    Chisalita, Ioan
    Linköping University, The Institute of Technology. Linköping University, Department of Computer and Information Science, IISLAB - Laboratory for Intelligent Information Systems.
    Linköping University's Virtual Companion project2004In: IEEE pervasive computing, ISSN 1536-1268, E-ISSN 1558-2590, Vol. 3, no 2, p. 50-50Article in journal (Other academic)
1 - 16 of 16
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  • apa
  • harvard1
  • ieee
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  • oxford
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  • en-US
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  • asciidoc
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