Management of infrastructure and traffic volume versus road traffic safety

PURPOSE: The objective of the article is to present the impact of the environment and the use of telematics on the safety of road users, paying particular attention to changes in the death rate in road accidents, comparing Poland and other European countries.DESIGN/METHODOLOGY/APPROACH: The author has applied the Delphi method, which uses the knowledge, experience and opinions of experts in a given field. In addition, the focus was on the use of IT systems, e.g., by using them to monitor intersections, creating a system of informing drivers about the existing hazards, weather conditions, possible bypasses in order to more effectively manage transport and ensure a better flow of information, which leads to the improvement of road safety, increasing the driver's comfort and significantly shortening the driving time. The dynamic development of road traffic is associated with the emergence of risks for road users. In the first part of the research method, variables were characterized by frequency (N), standard deviation (SD), minimum value, lower quartile value (Q1), below (or equal to) 25.0% of observations, median - average value, below (or equal to) 50.0% of the observations, the value of the upper quartile, below (or equal to) 75.0% of the observations, and the maximum value. The percentage of people choosing a particular assessment of a given answer variant is also presented. The Mann-Whitney U test was also used in the second research part for comparison of the number of fatalities in accidents in Poland and other European countries.FINDINGS: The results of the analyses made it possible to answer the question whether the use of modern telematics solutions can significantly affect road safety. In addition, subsequent analyses allowed to find an answer to the question of whether there were any changes in the accident fatality rate in Europe from 2009 to 2018. The research indicates an important role in the issues of road safety and hazards.PRACTICAL IMPLICATIONS: The research provides pragmatic tips for practical road safety solutions. In addition, this research significantly expands the literature on the impact of modern telematics solutions on road safety.ORIGINALITY/VALUE: It is an original research that can be used to solve specific problems on its own or also simultaneously with other research methods.peer-reviewe

Design and analysis of multi-element antenna systems and agile radiofrequency frontends for automotive applications

Vehicular connectivity serves as one of the major enabling technologies for current applications like driver assistance, safety and infotainment as well as upcoming features like highly automated vehicles - all of which having certain quality of service requirements, e. g. datarate or reliability. This work focuses on vehicular integration of multiple-input-multiple-output (MIMO) capable multielement antenna systems and frequency-agile radio frequency (RF) front ends to cover current and upcoming connectivity needs. It is divided in four major parts. For each part, mostly physical layer effects are analyzed (any performance lost on physical layer, cannot be compensated in higher layers), sensitivities are identified and novel concepts are introduced based on the status-quo findings.Fahrzeugvernetzung dient als eine der wesentlichsten Befähigungstechnologien für moderne Fahrerassistenzsysteme und zukünftig auch hochautomatisiertes Fahren. Sowohl die heutigen als auch zukünftige Anwendungen haben besondere Dienstgüteanforderungen, z.B. in Bezug auf die Datenrate oder Verlässlichkeit. Im Rahmen dieser Arbeit wird die Integration von Mehrantennensystemen für MIMO-Funkanwendungen (MIMO: engl. Multiple Input Multiple Output) sowie von frequenzagilen Hochfrequenzfrontends im Fahrzeugumfeld untersucht, um so eine technische Grundlage für zukünftige Anforderungen an die automobile Vernetzung anbieten zu können. Die dabei gewonnenen Erkenntnisse lassen sich in vier Teile gliedern. Grundsätzlich konzentrieren sich die Untersuchungen vorrangig auf die physikalische Ebene. Auf Basis des aktuellen Status Quo werden Sensitivitäten herausgearbeitet, neue Konzepte hergeleitet und entwickelt

The Role of communication and network technologies in vehicular applications

International audienceVehicular networks attract a lot of attention in the research world. Novel vehicular applications need a suitable communication channel in order to extend in-vehicle capabilities and, be aware about surrounding events. However, these networks present some proprieties, such as high mobility or specific topologies. These properties affect the performances of applications and more effort should be directed to identify the final necessities of the network. Few works deal with application requirements which should be considered when vehicular services are designed. In this chapter this gap is filled, proposing an analysis of application requirements which considers available technologies for physical/MAC and network layers. This study contains key factors which must be taken into account not only at the designing stage of the vehicular network, but also when applications are evaluated

Distributed Ledger Technologies for Network Slicing: A Survey

Network slicing is one of the fundamental tenets of Fifth Generation (5G)/Sixth Generation (6G) networks. Deploying slices requires end-to-end (E2E) control of services and the underlying resources in a network substrate featuring an increasing number of stakeholders. Beyond the technical difficulties this entails, there is a long list of administrative negotiations among parties that do not necessarily trust each other, which often requires costly manual processes, including the legal construction of neutral entities. In this context, Blockchain comes to the rescue by bringing its decentralized yet immutable and auditable lemdger, which has a high potential in the telco arena. In this sense, it may help to automate some of the above costly processes. There have been some proposals in this direction that are applied to various problems among different stakeholders. This paper aims at structuring this field of knowledge by, first, providing introductions to network slicing and blockchain technologies. Then, state-of-the-art is presented through a global architecture that aggregates the various proposals into a coherent whole while showing the motivation behind applying Blockchain and smart contracts to network slicing. And finally, some limitations of current work, future challenges and research directions are also presented.This work was supported in part by the Spanish Formación Personal Investigador (FPI) under Grant PRE2018-086061, in part by the TRUE5G under Grant PID2019-108713RB-C52/AEI/10.13039/501100011033, and in part by the European Union (EU) H2020 The 5G Infrastructure Public Private Partnership (5GPPP) 5Growth Project 856709.Publicad