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.

A reliable and secure approach for efficient Car-to-Car communication in intelligent transportation systems

Abstract: Intelligent Transportation System (ITS) is considered to be an integral part of the Smart City concept. As per the idea of ITS, intelligence incorporated in existing vehicles, both private and public, is expected to make vehicle management inexpensive and less complex. Some of the barriers in successful deployment of ITS have been its reliability, scalability, interoperability and security. Communication plays a big role in ITS and Wi-Fi/ cellular technologies have been used to facilitate Car-to-Server (C2S) and Server-to-Server (S2S) type communication. Car-to-Car (C2C) communication emerges as a more resource constrained and challenging model. Due to strict real-time, low delay and high security requirements, C2C presents several avenues for research. In this work, we investigate the network and security concerns of C2C architecture of ITS. Based on our study, we propose an effective approach for C2C communication using event-triggered broadcast of information. We use Public Key Infrastructure (PKI) based sender authentication for information verification. Furthermore, we provide Machine Learning based solutions to some common problems encountered during C2C communication.

Simulation-Based Evaluation of ETSI ITS-G5 and Cellular-VCS in a Real-World Road Traffic Scenario

Abstract: In recent years, two candidates for vehicular communications have evolved for the support of road safety and traffic efficiency applications. On the one hand, ad-hoc networks exist based on the ITS-G5/802.11p protocol stack, and on the other hand, there are cellular network infrastructures based on an extended LTE stack, which we refer to as Cellular-based Vehicular Communication Systems (Cellular-VCS). The most important extension of the classical LTE stack is a direct link among vehicles which is also called Device-to-Device (D2D) communication. Both approaches meet the requirements on vehicular communications but show technology-inherent mechanisms that result in different performances. ITS-G5 features a small latency at a small network load whereas Cellular-VCS promises a highly reliable packet transmission. One of the main difference of both approaches lies in the channel access which is random-based for ITS-G5 and centrally scheduled for Cellular-VCS. This contribution studies the performance of the two named technologies in a real-world road traffic scenario through comprehensive simulations. The simulation scenario makes use of real road traffic density measurements for modeling the mobility of the vehicles. Mixed network data traffic of periodically and event-based messages is generated through particular generation rules. The results prove that both technologies work stable at moderate road traffic conditions but have significant differences in the quantified communication parameters.

Design and experimental evaluation of a vehicular network based on NEMO and MANET

Abstract: Mobile Ad hoc Network (MANET) routing protocols and Network Mobility (NEMO) Basic Support are considered key technologies for vehicular networks. MANEMO, that is, the combination of MANET (for infrastructureless communications) and NEMO (for infrastructure-based communications) offers a number of benefits, such as route optimization or multihoming. With the aim of assessing the benefits of this synergy, this paper presents a policy-based solution to distribute traffic among multiple paths to improve the overall performance of a vehicular network. An integral vehicular communication testbed has been developed to carry out field trials. First, the performance of the Optimized Link State Routing protocol (OLSR) is evaluated in a vehicular network with up to four vehicles. To analyze the impact of the vehicles' position and movement on network performances, an integrated evaluation environment called Ana VANET has been developed. Performance results have been geolocated using GPS information. Second, by switching from NEMO to MANET, routes between vehicles are optimized, and the final performance is improved in terms of latency and bandwidth. Our experimental results show that the network operation is further improved with simultaneous usage of NEMO and MANET.

Comparative Study of Simulators for Vehicular Ad-hoc Networks (VANETs)

Abstract: Vehicular Ad hoc Networks (VANETs) are classified as an application of Mobile Ad-hoc Networks (MANETs) that has the potential in improving road safety and providing Intelligent Transportation System (ITS). Vehicular communication system facilitates communication devices for exchange of information among vehicles and vehicles and Road Side Units (RSUs).The era of vehicular ad- hoc networks is now gaining attention and momentum. Researchers and developers have built VANET simulation tools to allow the study and evaluation of various routing protocols, various emergency warning protocols and others VANET applications. Simulation of VANET routing protocols and its applications is fundamentally different from MANETs simulation because in VANETs, vehicular environment impose new issues and requirements, such as multi-path fading, roadside obstacles, trip models, traffic flow models, traffic lights, traffic congestion, vehicular speed and mobility, drivers behaviour etc. This paper presents a comparative study of various publicly available VANET simulation tools. Currently, there are network simulators, VANET mobility generators and VANET simulators are publicly available. In particular, this paper contrast their software characteristics, graphical user interface, accuracy of simulation, ease of use, popularity, input requirements, output visualization capabilities etc.