Vehicular communication systems

About: Vehicular communication systems is a research topic. Over the lifetime, 2532 publications have been published within this topic receiving 64775 citations. The topic is also known as: V2V & vehicle-to-vehicle.

Cost minimization scheduling for deadline constrained applications on vehicular cloud infrastructure

Abstract: Two categories of reasons have led to the emergence of vehicular cloud computing; on one hand vehicular networks and the new generation of well-equipped smart cars and on another, the advent of cloud computing and its maturity over a short time-span. Owing to these two facts, the concept of vehicular cloud computing has been shaped up in the recent years in which cloud services are offered through underutilized resources of vehicles that construct a dynamic groups of autonomous vehicles and therefore create a cloud. The difference between this set-up and conventional structures of cloud computing lies in the mobility of nodes which leads to change in the dynamics of resource availability over time. The goal of this study is to offer an application scheduling model for determining the optimum response needed for management of dynamic vehicular cloud resources in a way that tasks are completed with minimum cost; before their deadlines and within the lifetime of the cloud. To solve the aforementioned problem, a binary integer program model is formulated here, and the impact of changes in various parameters such as different tasks costs, application deadlines, types and lifetime of created clouds are analyzed and evaluated. The presented results, specify and highlight the factors that should be taken into consideration in the process of application scheduling and demonstrate how our proposed optimization model could result in reliable solutions for the vehicular computing optimization problems.

Cooperative vehicular communication systems based on visible light communication

Abstract: The use of visible light communication (VLC) in vehicular communication systems for vehicle safety applications is proposed. The system aims to ensure the communication between a LED-based VLC emitter and an on-vehicle VLC receiver. A traffic scenario is established. Vehicle-to-vehicle (V2V) and infrastructure-to-vehicle (I2V) communications are analyzed. For the V2V communication study, the emitter was developed based on the vehicle headlights, whereas for the study of I2V communication system, the emitter was built based on streetlights. The VLC receiver is based on amorphous SiC technology and enhances the conditioning of the signal enabling to decode the transmitted information. Receivers are located at the rooftop of the vehicle, for I2V communications, and at the tails for V2V reception. Clusters of emitters, in a square topology, are used in the I2V transmission. The information and the ID code of each emitter in the network are sent simultaneously by modulating the individual chips of the trichromatic white LED. Free space is the transmission medium. An on–off code is used to transmit data. An algorithm to decode the information at the receivers is set. The proposed system was tested. The experimental results confirmed that the proposed cooperative VLC architecture is suitable for the intended applications.

Cognitive VANET with enhanced priority scheme

Abstract: Vehicular communications are important to ensure emergency messages are transmitted on time to prevent accidents. Therefore, in recent years, various standardization bodies and automobile companies have developed vehicular ad hoc network (VANET) to ensure public road safety. The current IEEE802.11p schemes utilize only traffic type to categorize priority levels. However, accidents are prone to occur when vehicles are in close distance. Therefore, based on the latest standard draft of IEEE1609.4 and IEEE802.11p, the proposed scheme, namely Enhanced Priority VANET Scheme (EPVS) is proposed where distance range between vehicles is derived and transmission priority level is categorized based on reliable distance range and data type. Performance of the proposed EPVS is evaluated in Vehicles in Network Simulation (Veins) with road traffic simulator, Simulation of Urban mobility (SUMO) using a realistic urban map. Simulations results show that the proposed EPVS results in lower average delay, in comparison with the default IEEE802.11p scheme.

Performance evaluation of a secure MAC protocol for vehicular networks

Abstract: The main benefit of vehicular communication is seen in active safety systems that increase passenger safety by exchanging warning messages between vehicles. Other applications and private services are also permitted in order to lower the cost and to encourage vehicular network deployment and adoption. The allocation of 75 MHz in the 5.9 GHz frequency band licensed for dedicated short range communications (DSRC), which supports seven separate channels, may also enable the future delivery of rich multimedia contents to vehicles at short- to medium-range via vehicular communications. There are many challenges that must be addressed before vehicular networks can be successfully deployed. Among these challenges is designing of security mechanisms to secure vehicular networks against abuse, and designing of efficient medium access control (MAC) protocols so that safety related and other application messages can be timely and reliably disseminated through vehicular networks. In this paper, we give an overview on a priority based secure MAC protocol for vehicular networks and present detailed security and performance analysis. We show that the MAC protocol can achieve both QoS and security requirements for vehicular network safety applications.