The Experts below are selected from a list of 3771 Experts worldwide ranked by ideXlab platform

Antonella Molinaro - One of the best experts on this subject based on the ideXlab platform.

  • d2d in lte Vehicular Networking system model and upper bound performance
    International Conference on Ultra Modern Telecommunications, 2015
    Co-Authors: Giuseppe Piro, Claudia Campolo, Giuseppe Araniti, Antonino Orsino, Gennaro Boggia, Antonella Molinaro
    Abstract:

    The Device-to-Device (D2D) communication over the Long Term Evolution (LTE) cellular system is emerging as a key technology to support safety and traffic efficiency applications in Vehicular Ad-hoc NETworks (VANETs). By offering a flexible usage of the radio interface, it allows vehicles to directly communicate each other, while experiencing low-latency and highly reliable data delivery. Anyway, the impact that application traffic patterns and transmission settings have on the overall performance is still unclear and in this context it is necessary a deep study for driving future research activities. To this end, the present contribution proposes a flexible methodology that characterizes, from a system level point of view, the upper bound performance of Vehicular D2D communications as a function of the application, the access layer settings, and the channel behavior. Model outcomes have been used to provide insights about the most suitable transmission parameters, the achievable transmission range, and the supported vehicles density in VANETs scenarios.

  • LTE for Vehicular Networking: a survey
    IEEE Communications Magazine, 2013
    Co-Authors: Giuseppe Araniti, Massimo Condoluci, Claudia Campolo, Antonio Iera, Antonella Molinaro
    Abstract:

    A wide variety of applications for road safety and traffic efficiency are intended to answer the urgent call for smarter, greener, and safer mobility. Although IEEE 802.11p is considered the de facto standard for on-the-road communications, stakeholders have recently started to investigate the usability of LTE to support Vehicular applications. In this article, related work and running standardization activities are scanned and critically discussed; strengths and weaknesses of LTE as an enabling technology for Vehicular communications are analyzed; and open issues and critical design choices are highlighted to serve as guidelines for future research in this hot topic.

  • content centric Vehicular Networking an evaluation study
    International Conference on Network of Future, 2012
    Co-Authors: Marica Amadeo, Claudia Campolo, Antonella Molinaro
    Abstract:

    Content-centric Networking (CCN) is a promising paradigm for the future Internet architecture. Data access and delivery in a content-centric network rely on content names instead of host addresses. Some preliminary results have shown that a CCN-like approach outperforms the legacy TCP/IP protocol suite and well copes with dynamic, short-lived and intermittent connectivity in Vehicular environments. To assess and extend our previous findings, in this paper we report the results of a broad simulation study aiming at evaluating the effectiveness and efficiency of the proposed content-centric Vehicular Networking architecture under a variety of different traffic loads, vehicle densities, and content popularity settings.

  • CRoWN: Content-Centric Networking in Vehicular Ad Hoc Networks
    IEEE Communications Letters, 2012
    Co-Authors: Marica Amadeo, Claudia Campolo, Antonella Molinaro
    Abstract:

    Content-centric Networking is a new paradigm conceived for future Internet architectures, where communications are driven by contents instead of host addresses. This paradigm has key potentialities to enable effective and efficient communications in the challenging Vehicular environment characterized by short-lived connectivity and highly dynamic network topologies. We design CRoWN, a content-centric framework for Vehicular ad-hoc networks, which is implemented on top of the IEEE 802.11p standard layers and is fully compliant with them. Performance comparison against the legacy IP-based approach demonstrates the superiority of CRoWN, thus paving the way for content-centric Vehicular Networking.

Xuemin Shen - One of the best experts on this subject based on the ideXlab platform.

  • Vehicular Networking techniques for road safety applications
    2020
    Co-Authors: Feng Lyu, Xuemin Shen
    Abstract:

    As the performance of road-safety applications depends on the communication quality in terms of delay and reliability, which can be affected at the MAC, link, and network layers, in this chapter, we provide a comprehensive survey of Vehicular Networking techniques for road-safety applications. Particularly, we review the state-of-the-art related researches in three sections: (1) MAC design; (2) Link quality characterization and enhancement; and (3) network congestion control.

  • a survey on platoon based Vehicular cyber physical systems
    IEEE Communications Surveys and Tutorials, 2016
    Co-Authors: Dongyao Jia, Jianping Wang, Xiang Zhang, Xuemin Shen
    Abstract:

    Vehicles on the road with some common interests can cooperatively form a platoon-based driving pattern, in which a vehicle follows another vehicle and maintains a small and nearly constant distance to the preceding vehicle. It has been proved that, compared with driving individually, such a platoon-based driving pattern can significantly improve road capacity and energy efficiency. Moreover, with the emerging Vehicular ad hoc network (VANET), the performance of a platoon in terms of road capacity, safety, energy efficiency, etc., can be further improved. On the other hand, the physical dynamics of vehicles inside the platoon can also affect the performance of a VANET. Such a complex system can be considered a platoon-based Vehicular cyber-physical system (VCPS), which has attracted significant attention recently. In this paper, we present a comprehensive survey on a platoon-based VCPS. We first review the related work of a platoon-based VCPS. We then introduce two elementary techniques involved in a platoon-based VCPS, i.e., the Vehicular Networking architecture and standards, and traffic dynamics, respectively. We further discuss the fundamental issues in a platoon-based VCPS, including vehicle platooning/clustering, cooperative adaptive cruise control, platoon-based Vehicular communications, etc., all of which are characterized by the tightly coupled relationship between traffic dynamics and VANET behaviors. Since system verification is critical to VCPS development, we also give an overview of VCPS simulation tools. Finally, we share our view on some open issues that may lead to new research directions.

Marcos Katz - One of the best experts on this subject based on the ideXlab platform.

  • Vehicular Networking: ITS-G5 vs 5G Performance Evaluation using Road Weather Information
    2020 International Conference on Software Telecommunications and Computer Networks (SoftCOM), 2020
    Co-Authors: Muhammad Naeem Tahir, Timo Sukuvaara, Marcos Katz
    Abstract:

    Safety of transport systems on roads has become the crucial developmental concern within the road infrastructure. The prevailing climatic situation plays a crucial role on transport safety and it is a key cause behind weather hazards in traffic, leading to accidents in northern regions of Europe and America. In this article, we present the test results of pilot road weather related services on a set of Vehicle-to-Infrastructure (V2I) communication scenarios by using ITS-G5 (IEEE 802.11p) and 5G test network with TCP and UDP. TCP/UDP are the transport layer connection orientated (TCP) and connectionless (UDP) IP protocols that define how information on internet can be exchanged. The Finnish Meteorological Institute (FMI) has a test track equipped with both Road Weather Stations (RWS) and a 5G test network (5GTN). These networks have the capability of supporting ITS-enabled road weather services in very realistic situations. We evaluated the performance of ITS-G5 and 5GTN with transport layer TCP and UDP. The performance is investigated by considering average throughput and lost packets. The analysis of transport layer protocols provides us a deep insight of Vehicular Networking and performance degradation factors. Even though IEEE 802.11p is specifically designed for Vehicular communication, the soon-to-be deployed 5G technology would be able to offer the reliability to satisfy functional safety requirements with almost 80% of TCP data traffic. The evaluation indicated that the state-of-the-art 5G technology would be a better substitute to fulfill majority of the required features for Vehicular applications, including latency, throughput and others.

  • IEEE 802.11p based Vehicular Networking operational pilot field measurement
    IEEE Journal on Selected Areas in Communications, 2013
    Co-Authors: Timo Sukuvaara, Riika Ylitalo, Marcos Katz
    Abstract:

    For Vehicular Networking purposes the main communication standard\napproach on global scale is the IEEE 802.11p. This protocol-based\nsystem, together with the 3G cellular network, was the main elements of\nour car communications test-bed network. The developed test-bed\nimplements an intelligent heterogeneous traffic safety network between\ncars and infrastructure. It also offers the possibility to exploit\nvehicle based sensor and observation data in order to generate\nintelligent real-time services and a service platform for vehicles. The\nmain goal was to improve traffic safety with accident and weather\ncondition related accurate services, but also to offer a platform for\ntrue bi-directional Internet-like Networking experience tailored\ncost-effectively to Vehicular environments. This paper presents the\nfield test results of a new standard system for car communication, IEEE\n802.11p Vehicular Networking measurements in Northern Finland (with\nsupporting simulations). The results achieved in developed heterogeneous\nNetworking system (with special services) pilot testing are presented\nalso. Based on the experience gained from both field measurements and\npilot deployment, we propose a system deployment strategy for simple\nscenarios with general system efficiency estimation. It is shown that\nthe solution has clear potential for a comprehensive heterogeneous\nVehicular communication and safety network.

Dongyao Jia - One of the best experts on this subject based on the ideXlab platform.

  • platoon based cooperative driving model with consideration of realistic inter vehicle communication
    Transportation Research Part C-emerging Technologies, 2016
    Co-Authors: Dongyao Jia, Dong Ngoduy
    Abstract:

    Recent developments of information and communication technologies (ICT) have enabled vehicles to timely communicate with each other through wireless technologies, which will form future (intelligent) traffic systems (ITS) consisting of so-called connected vehicles. Cooperative driving with the connected vehicles is regarded as a promising driving pattern to significantly improve transportation efficiency and traffic safety. Nevertheless, unreliable Vehicular communications also introduce packet loss and transmission delay when Vehicular kinetic information or control commands are disseminated among vehicles, which brings more challenges in the system modeling and optimization. Currently, no data has been yet available for the calibration and validation of a model for ITS, and most research has been only conducted for a theoretical point of view. Along this line, this paper focuses on the (theoretical) development of a more general (microscopic) traffic model which enables the cooperative driving behavior via a so-called inter-vehicle communication (IVC). To this end, the authors design a consensus-based controller for the cooperative driving system (CDS) considering (intelligent) traffic flow that consists of many platoons moving together. More specifically, the IEEE 802.11p, the de facto Vehicular Networking standard required to support ITS applications, is selected as the IVC protocols of the CDS, in order to investigate how the Vehicular communications affect the features of intelligent traffic flow. This study essentially explores the relationship between IVC and cooperative driving, which can be exploited as the reference for the CDS optimization and design.

  • a survey on platoon based Vehicular cyber physical systems
    IEEE Communications Surveys and Tutorials, 2016
    Co-Authors: Dongyao Jia, Jianping Wang, Xiang Zhang, Xuemin Shen
    Abstract:

    Vehicles on the road with some common interests can cooperatively form a platoon-based driving pattern, in which a vehicle follows another vehicle and maintains a small and nearly constant distance to the preceding vehicle. It has been proved that, compared with driving individually, such a platoon-based driving pattern can significantly improve road capacity and energy efficiency. Moreover, with the emerging Vehicular ad hoc network (VANET), the performance of a platoon in terms of road capacity, safety, energy efficiency, etc., can be further improved. On the other hand, the physical dynamics of vehicles inside the platoon can also affect the performance of a VANET. Such a complex system can be considered a platoon-based Vehicular cyber-physical system (VCPS), which has attracted significant attention recently. In this paper, we present a comprehensive survey on a platoon-based VCPS. We first review the related work of a platoon-based VCPS. We then introduce two elementary techniques involved in a platoon-based VCPS, i.e., the Vehicular Networking architecture and standards, and traffic dynamics, respectively. We further discuss the fundamental issues in a platoon-based VCPS, including vehicle platooning/clustering, cooperative adaptive cruise control, platoon-based Vehicular communications, etc., all of which are characterized by the tightly coupled relationship between traffic dynamics and VANET behaviors. Since system verification is critical to VCPS development, we also give an overview of VCPS simulation tools. Finally, we share our view on some open issues that may lead to new research directions.

Yongtae Park - One of the best experts on this subject based on the ideXlab platform.

  • a feasibility study and development framework design for realizing smartphone based Vehicular Networking systems
    IEEE Transactions on Mobile Computing, 2014
    Co-Authors: Yongtae Park, Seungho Kuk, Hyogon Kim, Chiehjan Mike Liang
    Abstract:

    Designing and distributing effective Vehicular safety applications can help significantly reduce the number of car accidents and assure the safety of many precious lives. However, despite the efforts from standardization bodies and industrial manufacturers, many studies suggest that it will take more than a decade for full deployment. We start this work with the hypothesis that smartphones may be suitable platforms for catalyzing the distribution of Vehicular safety systems. Specifically, smartphones connected to their respective cellular networks can report sensing data to back-end application servers and exchange safety-related messages. This paper first evaluates the performance of the Vehicular ad-hoc Networking standards and the hardware platforms that implement them. Next, we perform empirical evaluations on the performance of cellular networks to confirm their applicability in Vehicular Networking. Based on our observations, we present the VoCell application development framework. VoCell, comprehends a set of components that eases the development of smartphone applications for Vehicular Networking applications. Using VoCell, developers can easily access internal and external sensing components and share this data to servers. We present a number of example applications developed using VoCell and evaluate their effectiveness in local and highway environments using a pilot deployment. We envision that VoCell can act as a building block for enabling new smartphone-based systems for Vehicular Networking applications.

  • collision control of periodic safety messages with strict messaging frequency requirements
    IEEE Transactions on Vehicular Technology, 2013
    Co-Authors: Yongtae Park
    Abstract:

    For safety messages in a Vehicular Networking environment, strict messaging frequency requirements exist. For instance, six out of eight cooperative Vehicular safety applications, as chosen by the National Highway Traffic Safety Administration and the Crash Avoidance Metrics Partnership, require a minimum of 10 Hz, whereas the precrash sensing application requires an even higher frequency of 50 Hz, for messages that convey the positions of vehicles. Currently, the collisions of periodic safety message broadcasts for the IEEE Wireless Access in Vehicular Environment (WAVE) system are left to the IEEE 802.11p medium access control (MAC) to resolve. With small contention window sizes stipulated in the 802.11p amendment, however, the MAC offers only limited relief to the collision problem, particularly toward the beginning of the control channel (CCH) interval. In this paper, we show that application-level control of the message transmission phase is desirable, when the frequency adaptation is not allowed due to the application requirement. We demonstrate through simulation and analysis that the proposed technique achieves up to 50% higher message reception probability compared with that relying only on the 802.11p MAC. The proposed method works in the safety applications themselves; therefore, the existing standards need not be modified.