Vehicle-to-Vehicle Communications: Reception and Interference of Safety-Critical Messages (Fahrzeug-zu-Fahrzeug-Kommunikation: Empfang und Interferenz sicherheitskritischer Nachrichten)

2008 ◽  
Vol 50 (4) ◽  
Author(s):  
Felix Schmidt-Eisenlohr ◽  
Moritz Killat
Keyword(s):  
Traffic Safety ◽  
Ad Hoc Network ◽  
Large Scale ◽  
Ad Hoc ◽  
Computational Effort ◽  
Vehicular Communications ◽  
Radio Communication ◽  
Simulation Methodology ◽  
Vehicle To Vehicle ◽  
Simulation Results

SummaryA robust exchange of messages between vehicles via radio communication represents a key problem of vehicular ad hoc network (VANET) research. Environmental influences and the multitude of communicating nodes result in challenging communication conditions that have to be taken into account when assessing the potential benefit of VANETs for traffic safety and efficiency applications. In this paper we discuss an appropriate modeling of three influencing factors on the communication behavior to establish a basis for credible simulation results. In detail, we analyze the effects of fast-fading, capturing, and cumulative noise on vehicular communications and illustrate their considerable influence on a simulation's outcome. As a second contribution, we provide an empirical model for the probability of packet reception that is based on the proposed simulation methodology. The model thus allows to determine credible simulation results without being dependent on the complexity of detailed simulations. The saved computational effort facilitates the assessment of VANETs in large-scale scenarios and the consideration of communication specifics in the design process.

scholarly journals Cooperation as a Service in VANET: Implementation and Simulation Results

2012 ◽  
Vol 8 (2) ◽  
pp. 153-172 ◽  
Author(s):  
Hajar Mousannif ◽  
Ismail Khalil ◽  
Stephan Olariu
Keyword(s):  
Ad Hoc Networks ◽  
Traffic Safety ◽  
Vehicular Networks ◽  
Vehicular Ad Hoc Networks ◽  
Ad Hoc ◽  
Network Routing ◽  
The Road ◽  
Vehicle To Vehicle ◽  
Simulation Results ◽  
Hoc Networks

The past decade has witnessed the emergence of Vehicular Ad-hoc Networks (VANET), specializing from the well-known Mobile Ad Hoc Networks (MANET) to Vehicle-to-Vehicle (V2V) and Vehicle-to-Infrastructure (V2I) wireless communications. While the original motivation for Vehicular Networks was to promote traffic safety, recently it has become increasingly obvious that Vehicular Networks open new vistas for Internet access, providing weather or road condition, parking availability, distributed gaming, and advertisement. In previous papers [27,28], we introduced Cooperation as a Service (CaaS); a new service-oriented solution which enables improved and new services for the road users and an optimized use of the road network through vehicle's cooperation and vehicle-to-vehicle communications. The current paper is an extension of the first ones; it describes an improved version of CaaS and provides its full implementation details and simulation results. CaaS structures the network into clusters, and uses Content Based Routing (CBR) for intra-cluster communications and DTN (Delay–and disruption-Tolerant Network) routing for inter-cluster communications. To show the feasibility of our approach, we implemented and tested CaaS using Opnet modeler software package. Simulation results prove the correctness of our protocol and indicate that CaaS achieves higher performance as compared to an Epidemic approach.

scholarly journals To investigate the effect of Mobile IP on the performance of VANET through realistic channel conditions.

2015 ◽  
Vol 14 (7) ◽  
pp. 5911-5918
Author(s):  
Komal Sharma
Keyword(s):  
Traffic Safety ◽  
Ad Hoc Network ◽  
Large Scale ◽  
Network Performance ◽  
Ad Hoc ◽  
Mobile Ip ◽  
High Mobility ◽  
Comparative Performance ◽  
Urban Scenario

  Abstract Vehicular Ad hoc Network (VANET) is a specialized Ad hoc Network, which provides safety and comfort for passengers [1]. Due to the specific characteristic of VANET like high mobility and large scale node population [1], providing Quality of Service (QoS) in this type of wireless network is a challenging issue. As a result, we combine Mobile IP and VANET to improve QoS in terms of packet loss and throughput for traffic safety and entertainment applications. Comparative performance evaluation is done in terms of QOS parameters to show the network performance using different traffic types and by varying speed of the vehicles under urban scenario.

scholarly journals Influence of VANET System on Movement of Traffic Flows in Emergency Situations

2015 ◽  
Vol 27 (3) ◽  
pp. 237-246 ◽  
Author(s):  
Algimantas Kajackas ◽  
Vidas Žuraulis ◽  
Edgar Sokolovskij
Keyword(s):  
Reaction Time ◽  
Ad Hoc Network ◽  
Ad Hoc ◽  
Emergency Situation ◽  
Traffic Flows ◽  
Residual Velocity ◽  
Vehicle Collisions ◽  
Emergency Braking ◽  
Emergency Situations ◽  
Vehicle To Vehicle

The paper presents Vehicular Ad Hoc Network (VANET) system based on an analysis of the movement of a motorcade in an emergency situation. This analysis seeks to answer the question: when and under what conditions Emergency Message (EM) sent by Vehicle-to-Vehicle (V2V) system reaches the final target to help in preventing of serious accidents, such as multi-vehicle collisions. The model of calculation based on the key principles of vehicle braking enables finding the time to possible collision and the residual velocity of the vehicle. In the calculations, the average values of the driver’s reaction time are accepted; in addition, a sent emergency message is considered to be free of interference. Upon choosing different road and driving conditions, it is found what vehicle of the motorcade stops before the possible obstacle on emergency braking. The performance of vehicles with and without VANET system is compared.

Application of Connected and Automated Vehicles in a Large-Scale Network by Considering Vehicle-to-Vehicle and Vehicle-to-Infrastructure Technology

2020 ◽  
pp. 036119812096310
Author(s):  
Md Hasibur Rahman ◽  
Mohamed Abdel-Aty
Keyword(s):  
Traffic Safety ◽  
Control Algorithm ◽  
Large Scale ◽  
Signal Control ◽  
Market Penetration ◽  
Automated Vehicles ◽  
Large Scale Network ◽  
Vehicle To Vehicle ◽  
Scale Network ◽  
Vehicle To Infrastructure

Application of connected and automated vehicles (CAVs) is expected to have a significant impact on traffic safety and mobility. Although several studies evaluated the effectiveness of CAVs in a small roadway segment, there is a lack of studies analyzing the impact of CAVs in a large-scale network by considering both freeways and arterials. Therefore, the objective of this study is to analyze the effectiveness of CAVs at the network level by utilizing both vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) communication technologies. Also, the study proposed a new signal control algorithm through V2I technology to elevate the performance of CAVs at intersections. A car-following model named cooperative adaptive cruise control was utilized to approximate the driving behavior of CAVs in the Aimsun Next microsimulation environment. For the testbed, the research team selected Orlando central business district area in Florida, U.S. To this end, the impacts of CAVs were evaluated based on traffic efficiency (e.g., travel time rate [TTR], speed, and average approach delay, etc.) and safety surrogates (e.g., standard deviation of speed, real-time crash-risk models for freeways and arterials, time exposed time-to-collision). The results showed that the application of CAVs reduced TTR significantly compared with the base condition even with the low market penetration level. Also, the proposed signal control algorithm reduced the approach delay for 94% of the total intersections present in the network. Moreover, safety evaluation results showed a significant improvement of traffic safety in the freeways and arterials under CAV conditions with different market penetration rates.

Heterogeneous Architecture for Ad Hoc Networks

2013 ◽  
Vol 756-759 ◽  
pp. 1059-1062 ◽  
Author(s):  
Xue Bing Wang
Keyword(s):  
Ad Hoc Networks ◽  
Ad Hoc Network ◽  
Network Architecture ◽  
Ad Hoc ◽  
Model Simulation ◽  
Routing Algorithm ◽  
Clustering Coefficient ◽  
Heterogeneous Architecture ◽  
Simulation Results ◽  
Hoc Networks

By making small adjustment to general ad hoc network architecture, we build a network topology with short average path length and high clustering coefficient, which are two important metrics of ad hoc networks. Furthermore, an efficient probabilistic flooding routing algorithm is proposed based on this network model. Simulation results show that this architecture behaves better performance than its ordinary counterpart.

Connectivity Analysis in Wireless Ad Hoc Network Based on Interference and Fading Channel

2013 ◽  
Vol 427-429 ◽  
pp. 2338-2343
Author(s):  
Qian Li ◽  
Qi Zhu
Keyword(s):  
Fading Channels ◽  
Ad Hoc Network ◽  
Rayleigh Fading ◽  
Ad Hoc ◽  
Sir Model ◽  
Wireless Ad Hoc Network ◽  
Connectivity Analysis ◽  
Connectivity Probability ◽  
Ad Hoc Wireless Network ◽  
Simulation Results

Connectivity is the fundamental of the Ad Hoc wireless network for end to end data transmissions. It becomes difficult to keep the connectivity when uncertain features increase, such as fading channels and interference in the network. Based on the theory of stochastic geometry, a SIR model is used to calculate the link probability between nodes. We derive a tight explicit expression for the connectivity probability in the present of Rayleigh fading and interference. According to this expression, we can optimize network topology efficiently. Simulation results validate the accuracy of our conclusion.

scholarly journals A new metric for routing in military wireless network

2014 ◽  
Vol 05 (02) ◽  
pp. 1450001
Author(s):  
Haibo Jiang ◽  
Yaofei Ma ◽  
Dongsheng Hong ◽  
Zhen Li
Keyword(s):  
Wireless Network ◽  
Routing Protocol ◽  
Ad Hoc Network ◽  
Ad Hoc ◽  
Transmission Delay ◽  
Wireless Ad Hoc Network ◽  
A Algorithm ◽  
Shortest Path Routing ◽  
Frequency Selection ◽  
Simulation Results

Wireless ad hoc network is generally employed in military and emergencies due to its flexibility and easy-to-use. It is suitable for military wireless network that has the characteristics of mobility and works effectively under severe environment and electromagnetic interfering conditions. However, military network cannot benefit from existing routing protocol directly; there exists quite many features which are only typical for military network. For example, there are several radios in the same vehicle. This paper presents a new metric for routing, which is employed in A* algorithm. The goal of the metric is to choose a route of less distance and less transmission delay between a source and a destination. Our metric is a function of the distance between the ends and the bandwidth over the link. Moreover, we take frequency selection into account since a node can work on multi-frequencies. This paper proposed the new metric, and experimented it based on A* algorithm. The simulation results show that this metric can find the optimal route which has less transmission delay compared to the shortest path routing.

scholarly journals Disaster Management Using VANET

Webology ◽  
2021 ◽  
Vol 18 (02) ◽  
pp. 418-440
Author(s):  
Cynthia J. ◽  
J. Clement Sudhahar ◽  
Suguna M ◽  
Baskaran K.R ◽  
Senthil J ◽  
...  
Keyword(s):  
Disaster Management ◽  
Ad Hoc Network ◽  
Ad Hoc ◽  
Data Dissemination ◽  
Location Data ◽  
Vehicle To Vehicle ◽  
Alert Message ◽  
Topology Changes ◽  
Recovery Strategies ◽  
Vehicle To Infrastructure

Disaster management is management of tasks involving responses to emergencies and methods of devising recovery strategies from havocs caused by nature. It assumes paramount importance now as the human surrounding has enormously become unpredictable owing to natural or man-made disasters. Consequence of disaster can be reduced by broadcasting of disaster alert to a defined radius that could be affected by the disaster. The objective of disaster management is to ensure energy economical and reliable communication that is resilient to network topology changes within the area. Vehicular ad hoc network (VANET) is efficiently utilized to transfer the disaster alert information. Vehicle-to-Vehicle (V2V) and Vehicle-to-Infrastructure (V2I) communication is used for disseminating the disaster alert message. This study proposes an effective data acquisition from the disaster location, data dissemination to the neighbouring zones and disaster management using VANET technology.

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