Wireless vehicular networks for car collision avoidance

Wireless Vehicular Networks for Car Collision Avoidance focuses on the development of the ITS (Intelligent Transportation Systems) in order to minimize vehicular accidents. The book presents and analyses a range of concrete accident scenarios while examining the causes of vehicular collision and proposing countermeasures based on wireless vehicular networks. The book also describes the vehicular network standards and quality of service mechanisms focusing on improving critical dissemination of safety information. With recommendations on techniques and protocols to consider when improving road safety policies in order to minimize crashes and collision risks

Gestion de la mobilité et allocation de ressources dans les réseaux multiservices sans fil

VILLEURBANNE-DOC'INSA LYON (692662301) / SudocPARIS-Télécom ParisTech (751132302) / SudocSudocFranceF

Quality of Service Provisioning in Wireless Vehicular Networks: Challenges and Mechanisms

International audienceThe provision of reliable data transmission and low-latency wireless communications is challenging for the network operator due to the characteristics (high mobility) of the vehicle and several factors like quality of service requirements of real-time traffic

Inter-slice handover management in a V2X slicing environment using bargaining games

International audienceThis paper provides a V2X slicing logical architecture based on Software Defined Networking. We devote a special concern to inter-slice mobility management. In this context, we propose a complete mobility solution that handles resources management through the use of bargaining games enhanced by a heuristic and particular swarm optimization algorithm.More specifically, this work proposes a resource borrowing scheme to readjust resources of an overloaded slice in case of a inter-slice handover. The borrowing procedure is modeled via two bargaining games. Performance analysis shows that our proposed solution guarantees fairness between V2X slices, reduces the probability of call dropping and blocking probabilities and enhances resource utilization. Moreover, a comparative study between the proposed games is provided and analyzed

WiMAX Double Movable Boundary Scheme in the vehicle to Infrastructure Communication Scenario

International audienceWiMAX is an interesting technology that will be applied in vehicular networks due to the provisioning of high mobility, wide coverage, and different classes of service. In this paper, we investigate the problem of vehicular applications mapping in the Vehicular to Infrastructure scenario and propose a resource allocation algorithm applied in WiMAX networks. The proposed algorithm is a double movable boundary scheme which is based on dynamic sharing of resources between different traffic categories provided by a common resource pool. We provide as well a mathematical model of the mechanism and investigate the impact of critical resource allocation parameters on the overall performance. Performance results show that the algorithm respects the priority of real-time connections and prevents least-priority classes starvation problem. In fact, we strive to achieve two major components: fairness to different classes of service and service differentiation

Vertical group handover congestion game for a vehicular platoon in VLC networks

International audienceVehicle platooning systems improve road active safety while reducing vehicular congestion. Visible light communications (VLC) is an efficient technology that enables safety messages exchange between platoon members, and thus improves road safety. Nevertheless, packet transmission could be perturbed by neighboring vehicles, impacting the quality of service and inducing packet loss. Therefore, it is of paramount importance to tackle the provisioning of a vertical handover, of a group of competing platoon vehicles, to a radio frequency (RF) technology. This paper models the network selection procedure by means of a congestion game with an unknown number of players. More precisely, the game considers players that aim at choosing resources among a certain number of resources. Moreover, the game considers the lack of information about the users’ preferences. The main objective is to distribute platoon vehicles among available RF technologies, while maximizing the throughput of each user and avoiding network congestion. The game is solved with the safety-level equilibrium. Performance analysis shows that our solution offers high throughput, low delay, and packet loss ratio for each platoon vehicle while achieving load balancing among available networks

Modeling and performance evaluation of V2I communications

International audienc

EDCA virtual collision performance evaluation and mobility modeling in V2I communications

International audienc

P3-DCF: Service Differentiation in IEEE 802.11 WLANs using Per-Packet Priorities

International audienceWe introduce P3-DCF, a new quality of service (QoS) mechanism, within the MAC protocol in IEEE 802.11. P3-DCF enhances the distributed coordination function (DCF) for prioritized service in IEEE 802.11. A novel function, the per-packet priority function, integrated to DCF establishes not only a per-flow differentiation but schedules the packets with an earliest deadline first discipline as well. The simulations carried out show that the enhanced MAC protocol satisfies the maximum tolerable latency of real-time traffics and performs efficient flow differentiation. Moreover, the performance improvement is achieved without affecting the useful throughput