scholarly journals Design of a Cooperative Lane Change Protocol for a Connected and Automated Vehicle Based on an Estimation of the Communication Delay

Sensors ◽  
2018 ◽  
Vol 18 (10) ◽  
pp. 3499 ◽  
Author(s):  
Hongil An ◽  
Jae-il Jung
Keyword(s):  
Traffic Safety ◽  
Communication Delay ◽  
Lane Change ◽  
Simulation Environment ◽  
Automated Vehicle ◽  
V2v Communication ◽  
Vehicle To Vehicle ◽  
Local Path ◽  
Set Up ◽  
The Impact

Connected and automated vehicles (CAVs) have recently attracted a great deal of attention. Various studies have been conducted to improve vehicle and traffic safety through vehicle to vehicle (V2V) communication. In the field of CAVs, lane change research is considered a very challenging subject. This paper presents a cooperative lane change protocol, considering the impact of V2V communication delay. When creating a path for a lane change in the local path planning module, V2V communication delay occurs. Each vehicle was represented, in our study, by an oriented bounding box (OBB) to determine the risk of collision. We set up a highway driving simulation environment and verified the improved protocol by implementing a longitudinal and lateral controller.

scholarly journals Using Vehicle-to-Vehicle Communication to Improve Traffic Safety in Sand-dust Environment

2020 ◽  
Vol 17 (4) ◽  
pp. 1165
Author(s):  
Jinhua Tan ◽  
Xuqian Qin ◽  
Li Gong
Keyword(s):  
Traffic Flow ◽  
Traffic Safety ◽  
Active Role ◽  
Vehicle Communication ◽  
V2v Communication ◽  
Vehicle To Vehicle ◽  
Car Following Model ◽  
Environment Control ◽  
Traffic Systems ◽  
Sand Dust

Sand-dust environment affects drivers’ perceptions of surrounding traffic conditions, resulting in unsafe operations. From an ergonomics perspective, such adverse effects could be alleviated by environment control as well as the assistance of machines. Vehicle-to-vehicle (V2V) communication appears to be an important component of machines in future traffic systems, which could support the driving task. In order to explore what influences V2V communication would generate on traffic systems, this paper proposes a car-following model accounting for V2V communication in a sand-dust environment. The results indicate that V2V communication helps to reduce the fluctuations of acceleration, headway, and velocity, when a small perturbation is added to the traffic flow in sand-dust environment. If a vehicle in the traffic flow stops suddenly, the number of crumped vehicles decreases with V2V communication taken into account. Furthermore, the residual velocities of the crumped vehicles decrease, which means the severity of collision is suppressed. It is concluded that V2V communication can play an active role in the improvement of traffic safety in a sand-dust environment.

scholarly journals Modeling and Analysis on Minimum Safe Distance for Platooning Vehicles Based on Field Test of Communication Delay

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Mengyan Hu ◽  
Xiangmo Zhao ◽  
Fei Hui ◽  
Bin Tian ◽  
Zhigang Xu ◽  
...  
Keyword(s):  
Traffic Safety ◽  
Field Tests ◽  
Transportation Systems ◽  
Communication Delay ◽  
Ieee 802.11P ◽  
Safe Distance ◽  
Automated Driving ◽  
Emergency Braking ◽  
The Impact ◽  
Minimum Safe Distance

Vehicle platooning is a perspective technique for intelligent transportation systems (ITS). Connected and automated vehicles (CAVs) use dedicated short-range communication (DSRC) to form a convoy, in which the following vehicles can receive the information from their preceding vehicles to achieve safe automated driving and maintain a short headway. Consequently, a vehicle platoon can improve traffic safety and efficiency, further reducing fuel consumption. However, emergency braking inevitably occurs when the platoon meets an accident or a sudden mechanical failure. It is more critical when the wireless communication got delays. Therefore, “how to predefine a minimum safe distance (MSD) considering communication delay” is a challenging issue. To this end, a series of field tests were carried out to measure the communication delay of IEEE 802.11p that is the underlying protocol of DSRC. Subsequently, MSD is modeled and analyzed when the platoon travels at accelerating, cruising, and decelerating states. More importantly, the results of field tests are applied in the models to investigate the impact of communication delay on MSD in practice. The simulation results verify that the proposed model can effectively maintain the platooning vehicles’ safety even if emergency braking happens with certain communication delays.

scholarly journals A review on vehicle to vehicle communication system applications

2020 ◽  
Vol 18 (1) ◽  
pp. 188
Author(s):  
Hussein Ali Ameen ◽  
Abd Kadir Mahamad ◽  
Sharifah Saon ◽  
Danial Md. Nor ◽  
Kareem Ghazi
Keyword(s):  
Information And Communication Technologies ◽  
Traffic Safety ◽  
Traffic Control ◽  
Data Exchange ◽  
Vehicular Ad Hoc Networks ◽  
Intelligent Transportation System ◽  
Time Data ◽  
Automated Vehicle ◽  
Vehicle To Vehicle ◽  
Wide Range

<span>The field of automated vehicle technology is developing rapidly developing. While it is likely to be many years before self-driving cars are commercially viable and used in a wide range of conditions by the general public, technological advances are speeding along the automated technology continuum towards this destination. Automated vehicle technologies troth with significant social benefits such as reduced injuries and deaths, increased road efficiency, mobility. Automated vehicles can improve traffic safety, balance traffic flows, maximize road usage by offering driver warnings and/or assuming vehicle control in dangerous situations, as well as provide motorists with the best end-to-end transportation experience and reduce emissions, which are the most important goals of modern smart traffic control infrastructures. Exchanging data and integration of such systems with Vehicle-to-Vehicle (V2V) may be a keystone to successful readying of vehicular ad-hoc networks (VANETs) and will simply be the following step of this evolution, with dynamic period of time data exchange between all the players of the traffic dominant system and fostering cooperative urban quality. One of the applications of this concept is to provide vehicles and roads with the ability to make road time more enjoyable and also to make roads safer. These applications are typical examples of what an Intelligent Transportation System (ITS) is called, whose objective is to improve security by using new information and communication technologies (NTIC). In this paper, we will focus on the study of the main component in ITS systems and present a review of the major V2V benefits related to driver safety by focusing primarily on the recent developments of these systems.</span>

scholarly journals Improved Selection of Separate V2v Communication Assets for Lte

2019 ◽  
Vol 8 (6) ◽  
pp. 842-844
Keyword(s):  
Quantitative Relation ◽  
Successful Transmission ◽  
Future Evolution ◽  
V2v Communication ◽  
Vehicle To Vehicle ◽  
Vehicle To Infrastructure ◽  
Area Unit ◽  
Set Up ◽  
State Of Affairs ◽  
Selection Of

The Vehicle-to-Everything (V2X) speech holds the promise for rising avenue protection and decreasing street accidents with the help of sanctioning dependable and low latency decisions for four wheelers notably Cars. Most of the motors area unit incorporated with the serious duty technology that positive factors excessive speeds, V2X speech turns into obligatory to create sure security. The inter- automobile contact involves passing of records from Vehicle-to-Vehicle (V2V) or Vehicle-to-Infrastructure (V2I) and the other way around. during this paper, a aware effort has been placed on each V2I 2 and V2V speech during a multi-lane superhighway state of affairs, within which insurance set up is volumed through approach of the future Evolution Advanced (LTE-A) road issue unit (RSU) 2 community. A mechanism to dump motors with low Signal-to-Interference-plus-Noise quantitative relation (SINR) is projected and such cars are going to be served with the helpful resource of different motors that have bigger link to the RSU. moreover, we have a tendency to inspect the reforms within the potentialities of achieving purpose outturn and therefore the performance is classified through Brobdingnagian system-degree simulations. Results exhibit that the projected answer offloads calibre V2I hyperlinks to stronger V2V links, and during a similar approach can improve successful transmission likelihood

scholarly journals Decentralized Platoon Join-in-Middle Protocol Considering Communication Delay for Connected and Automated Vehicle

Sensors ◽  
2021 ◽  
Vol 21 (21) ◽  
pp. 7126
Author(s):  
Geonil Lee ◽  
Jae-il Jung
Keyword(s):  
Communication Delay ◽  
Planning System ◽  
Transport Systems ◽  
Cruise Control ◽  
Automated Vehicle ◽  
V2v Communication ◽  
Cooperative Adaptive Cruise Control ◽  
Vehicle Platooning ◽  
Management Protocol ◽  
V2v Communications

Cooperative driving is an essential component of intelligent transport systems (ITSs). It promises greater safety, reduced accidents, efficient traffic flow, and fuel consumption reduction. Vehicle platooning is a representative service model for ITS. The principal sub-systems of platooning systems for connected and automated vehicles (CAVs) are cooperative adaptive cruise control (CACC) systems and platoon management systems. Based on vehicle state information received through vehicle-to-vehicle (V2V) communication, the CACC system allows platoon vehicles to maintain a narrower safety distance. In addition, the platoon management system using V2V communications allows vehicles to perform platoon maneuvers reliably and accurately. In this paper, we propose a CACC system with a variable time headway and a decentralized platoon join-in-middle maneuver protocol with a trajectory planning system considering the V2V communication delay for CAVs. The platoon join-in-middle maneuver is a challenging research subject as the research must consider the requirement of a more precise management protocol and lateral control for platoon safety and string stability. These CACC systems and protocols are implemented on a simulator for a connected and automated vehicle system, PreScan, and we validated our approach using a realistic control system and V2V communication system provided by PreScan.

scholarly journals Success Probability Analysis of C-V2X Communications on Irregular Manhattan Grids

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Bin Pan ◽  
Hao Wu
Keyword(s):  
Spectral Efficiency ◽  
Success Probability ◽  
Dedicated Short Range Communications ◽  
V2v Communication ◽  
Vehicle To Vehicle ◽  
Evolution Path ◽  
Line Process ◽  
Poisson Line Process ◽  
Downlink Channels ◽  
The Impact

To overcome the shortcomings of Dedicated Short Range Communications (DSRC), cellular vehicle-to-everything (C-V2X) communications have been proposed recently, which has a variety of advantages over traditional DSRC, including longer communication range, broader coverage, greater reliability, and smooth evolution path towards 5G. In this paper, we consider an LTE-based C-V2X communications network in irregular Manhattan grids. We model the macrobase stations (MBSs) as a 2D Poisson point process (PPP) and model the roads as a Manhattan Poisson line process (MPLP), with the roadside units (RSUs) modeled as a 1D PPP on each road. As an enhancement architecture to DSRC, C-V2X communications include vehicle-to-vehicle (V2V) communication, vehicle-to-infrastructure (V2I) communication, vehicle-to-pedestrian (V2P) communication, and vehicle-to-network (V2N) communication. Since the spectrum for PC5 interface in 5.9 GHz is quite limited, cellular networks could share some channels to V2I links to improve spectral efficiency. Thus, according to Maximum Power-based Scheme, we adopt the stochastic geometry approach to compute the signal-to-interference ratio- (SIR-) based success probability of a typical vehicle that connects to an RSU or an MBS and the area spectral efficiency of the whole network over shared V2I and V2N downlink channels. In addition, we study the asymptotic characteristics of success probability and provide some design insights according to the impact of several key parameters on success probability.

scholarly journals Simulation Based Performance of Mumbai-Pune Expressway Scenario for Vehicle-to-Vehicle Communication Using IEEE 802.11P

2013 ◽  
Vol 14 (4) ◽  
pp. 300-315 ◽  
Author(s):  
Vaishali D. Khairnar ◽  
Ketan Kotecha
Keyword(s):  
Real Time ◽  
Traffic Safety ◽  
High Reliability ◽  
Ieee 802.11P ◽  
Channel Access ◽  
Data Traffic ◽  
Medium Access ◽  
V2v Communication ◽  
Vehicle To Vehicle ◽  
Simulation Scenario

Abstract Traffic safety applications using vehicle-to-vehicle (V2V) communication is an emerging technology and promising area within the ITS environment. Many of these applications require real-time communication with high reliability; to meet a real-time deadline, timely and predictable access to the channel. The medium access method used in 802.11p, CSMA with collision avoidance, does not guarantee channel access before a finite deadline. The well-known property of CSMA is undesirable for critical communications scenarios. The simulation results reveal that a specific vehicle is forced to drop over 80% of its packets because no channel access was possible before the next message was generated. To overcome this problem, we propose to use STDMA for realtime data traffic between vehicles. The real-time properties of STDMA are investigated by means of the highway road simulation scenario, with promising results.

A Simulation Environment for Analyzing the Impact of Volcanic Ash on Trajectory-Based Air Traffic Management

2013 ◽  
Author(s):  
Angela Schmitt ◽  
Ruzica Vujasinovic ◽  
Christiane Edinger ◽  
Julia Zillies ◽  
Vilmar Mollwitz
Keyword(s):  
Traffic Management ◽  
Volcanic Ash ◽  
Air Traffic Management ◽  
Air Traffic ◽  
Simulation Environment ◽  
The Impact

MOTIF DAN DAMPAK PERNIKAHAN DINI DI INDARUNG NGALAU BATU GADANG

2018 ◽  
Vol 1 (1) ◽  
pp. 1
Author(s):  
Murisal Murisal
Keyword(s):  
Young Men ◽  
Early Marriage ◽  
Marriage Law ◽  
Men And Women ◽  
Home Life ◽  
Family Household ◽  
Set Up ◽  
The Impact ◽  
Husband And Wife

Motif and Impact of Early Marriage in Indarung Ngalau Batu Gadang.Penelitian is motivated by teenagers who married early on. Today, young men and women have a tendency to be less prepared to enter the home life, they are only ready to marry (ready here can be interpreted, maturity in terms of financial, understand what the meaning of marriage according to marriage law) is the bond of inner birth between a man and a woman as husband and wife for the purpose of forming a happy and eternal family (household) based on the Supreme Godhead while they are not ready to set up a home, whereas to build a household requires preparation both physically and spiritually . The purpose of this study to determine the motives underlying adolescents to make early marriage and the impact caused in the household as a result of the marriage.

Dissent and Education

2018 ◽  
Author(s):  
Mark Burden
Keyword(s):  
Eighteenth Century ◽  
Seventeenth Century ◽  
Educational Activity ◽  
Educational Institutions ◽  
Higher Educational Institutions ◽  
Legal Restrictions ◽  
Higher Educational ◽  
Set Up ◽  
The Impact ◽  
Dissenting Academies

Much eighteenth-century Dissenting educational activity was built on an older tradition of Puritan endeavour. In the middle of the seventeenth century, the godly had seen education as an important tool in spreading their ideas but, in the aftermath of the Restoration, had found themselves increasingly excluded from universities and schools. Consequently, Dissenters began to develop their own higher educational institutions (in the shape of Dissenting academies) and also began to set up their own schools. While the enforcement of some of the legal restrictions that made it difficult for Dissenting institutions diminished across the eighteenth century, the restrictions did not disappear entirely. While there has been considerable focus on Dissenting academies and their contribution to debates about doctrinal orthodoxy, the impact of Dissenting schools was also considerable.

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