scholarly journals Disseminating a Large Amount of Data to Vehicular Network in an Urban Area

2011 ◽  
Vol 2011 ◽  
pp. 1-8
Author(s):  
Mina Taheri ◽  
Faramarz Hendesi
Keyword(s):  
Urban Area ◽  
Vehicular Networks ◽  
Vehicular Network ◽  
Global Network ◽  
Multiple Sources ◽  
Dynamic Nature ◽  
Rateless Coding ◽  
The Road ◽  
Road Side Unit ◽  
Centralized Coordination

The problem of distributing a large amount of data from multiple sources in an urban area is investigated. We explore an opportunistic approach for information collection, in which a vehicle obtains information about resources from encountered vehicles. This protocol could be applied in both dense and sparse vehicular networks. Due to the highly dynamic nature of the underlying vehicular network topology, we depart from architectures requiring centralized coordination, reliable MAC scheduling, or global network state knowledge, and instead adopt a distributed paradigm with simple protocols. In other words, a reliable dissemination is introduced from multiple sources when each node in the network shares a limited amount of its resources for cooperating with others. By using rateless coding at the Road Side Unit (RSU) and using vehicles as data carriers, an efficient way to achieve reliable dissemination to all nodes (even disconnected clusters in the network) is described.

Application of Cognitive Radio in VANET

2013 ◽  
pp. 289-314
Author(s):  
Komathy K.
Keyword(s):  
Cognitive Radio ◽  
Vehicular Networks ◽  
Vehicular Ad Hoc Networks ◽  
Data Communication ◽  
High Mobility ◽  
Vehicular Network ◽  
Vehicular Communication ◽  
The Road ◽  
And Performance ◽  
Hoc Networks

Vehicular Ad Hoc Networks (VANET) is an emerging application of Intelligent Transport System, which is mainly to assist public safety applications such as collision avoidance between the vehicles or between vehicles and other obstacles such as pedestrians. At the same time, it challenges the data communication because of its high mobility, short link lifetime, and frequent network fragmentations. Existing spectrum standard for vehicular communication underutilizes the frequency bands in the sparsely used regions when the licensed users are not deploying them even at the peak hours of the road. Congestion or route stalling is unavoidable in vehicular networking and this builds an impression that there is always a shortage of spectrum. A solution would be to have a cognitive radio that can utilize the spectrum that is not heavily used so as to ease congestion in other areas. This chapter brings out the application of cognitive radios in vehicular environments, a new and relatively less explored area of research. This chapter looks into a few existing studies in the literature which have focused on spectrum sensing techniques, routing methodology, and security for cognitive radio vehicular networks. In addition, this chapter also discusses the impact of changes in the vehicular network on the radio propagation channel and in turn on the operation and performance of the cognitive radio vehicular network. Finally, future directions in research have highlighted the existing challenges in specific areas.

scholarly journals Gerenciamento da Infraestrutura de Comunicação baseado na Distribuição Gaussiana do Tempo de Contato entre Veículos e a Infraestrutura

2019 ◽  
Author(s):  
Lucas Silva ◽  
Fernanda Sumika H. Souza ◽  
Daniel Ludovico Guidoni ◽  
João F. M. Sarubbi ◽  
Cristiano Pitangui ◽  
...  
Keyword(s):  
Urban Area ◽  
21St Century ◽  
Gaussian Distribution ◽  
Vehicular Networks ◽  
Vehicular Network ◽  
Urban Mobility ◽  
Deployment Strategy ◽  
Roadside Unit ◽  
High Connectivity ◽  
Very High

Seeking novel solutions for urban mobility seems paramount for 21st century society. This work discusses the performance of vehicular networks relying on the Delta Network. Delta characterizes the connectivity of the vehicular network by the percentage of travel time in which the vehicles are connected to the infrastructure. This work presents a novel deployment strategy based on the Gaussian distribution of the percentage of the trip duration in which vehicles are covered by the infrastructure. Roadside units are distributed throughout the urban area through a heuristic based on weights assigned according to the trips that are covered by the new roadside unit. The most important gain of this approach is that the resulting coverage pattern favors most of the fleet experiencing similar connectivity, while vehicles with very low or very high connectivity become the exception. The results demonstrate that the heuristic reaches its goal, promoting the distribution of percentage times of contact of vehicles with the infrastructure according to the Gaussian distribution.

scholarly journals Broadening Understanding on Managing the Communication Infrastructure in Vehicular Networks: Customizing the Coverage Using the Delta Network

2018 ◽  
Author(s):  
Cristiano M. Silva ◽  
Lucas D. Silva ◽  
Leonardo A. L. Santos ◽  
João F. M. Sarubbi ◽  
Andreas Pitsillides
Keyword(s):  
Urban Areas ◽  
Road Network ◽  
Vehicular Networks ◽  
Vehicular Network ◽  
Urban Environments ◽  
Urban Mobility ◽  
Circle Pattern ◽  
The Road ◽  
The Past ◽  
Definition Of

Over the past few decades, the growth of the urban population has been remarkable. Nowadays, 50% of the population lives in urban areas, and forecasts point that by 2050 this number will reach 70%. Today, 64% of all travel made is within urban environments and the total amount of urban kilometers traveled is expected to triple by 2050. Thus, seeking novel solutions for urban mobility becomes paramount for 21st century society. In this work, we discuss the performance of vehicular networks. We consider the metric Delta Network. The Delta Network characterizes the connectivity of the vehicular network through the percentage of travel time in which vehicles are connected to roadside units. This article reviews the concept of Delta Network and extends its study through the presentation of a general heuristic based on the definition of scores to identify the areas of the road network that should receive coverage. After defining the general heuristic, we show how small changes in the score computation can generate very distinct (and interesting) patterns of coverage, each one suited to a given scenario. In order to exemplify such behavior, we propose three deployment strategies based on simply changing the computation of scores. The results show that the strategies derived from the general heuristic are very interesting, all of them deploying roadside units in a circle pattern around the traffic epicenter.

scholarly journals RCVC: RSU-Aided Cluster-Based Vehicular Clouds Architecture for Urban Areas

Electronics ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 193
Author(s):  
Mohamed Ben bezziane ◽  
Ahmed Korichi ◽  
Chaker Abdelaziz Kerrache ◽  
Mohamed el Amine Fekair
Keyword(s):  
Urban Areas ◽  
High Speed ◽  
Service Discovery ◽  
Cluster Head ◽  
Experimental Comparison ◽  
The Road ◽  
Road Side Unit ◽  
End To End Delay ◽  
End To End ◽  
On The Road

As a promising topic of research, Vehicular Cloud (VC) incorporates cloud computing and ad-hoc vehicular network (VANET). In VC, supplier vehicles provide their services to consumer vehicles in real-time. These services have a significant impact on the applications of internet access, storage and data. Due to the high-speed mobility of vehicles, users in consumer vehicles need a mechanism to discover services in their vicinity. Besides this, quality of service varies from one supplier vehicle to another; thus, consumer vehicles attempt to pick out the most appropriate services. In this paper, we propose a novel protocol named RSU-aided Cluster-based Vehicular Clouds protocol (RCVC), which constructs the VC using the Road Side Unit (RSU) directory and Cluster Head (CH) directory to make the resources of supplier vehicles more visible. While clusters of vehicles that move on the same road form a mobile cloud, the remaining vehicles form a different cloud on the road side unit. Furthermore, the consumption operation is achieved via the service selection method, which is managed by the CHs and RSUs based on a mathematical model to select the best services. Simulation results prove the effectiveness of our protocol in terms of service discovery and end-to-end delay, where we achieved service discovery and end-to-end delay of 3 × 10−3 s and 13 × 10−2 s, respectively. Moreover, we carried out an experimental comparison, revealing that the proposed method outperformed several states of the art protocols.

scholarly journals A Cooperative Communication Protocol for QoS Provisioning in IEEE 802.11p/Wave Vehicular Networks

Sensors ◽  
2018 ◽  
Vol 18 (11) ◽  
pp. 3622 ◽  
Author(s):  
Jin-Woo Kim ◽  
Jae-Wan Kim ◽  
Dong-Keun Jeon
Keyword(s):  
Cooperative Communication ◽  
Vehicular Networks ◽  
Vehicular Ad Hoc Networks ◽  
Ad Hoc ◽  
Communication Protocol ◽  
Ieee 802.11P ◽  
The Road ◽  
Free Data ◽  
On The Road ◽  
Hoc Networks

Vehicular ad hoc networks (VANETs) provide information and entertainment to drivers for safe and enjoyable driving. Wireless Access in Vehicular Environments (WAVE) is designed for VANETs to provide services efficiently. In particular, infotainment services are crucial to leverage market penetration and deployment costs of the WAVE standard. However, a low presence of infrastructure results in a shadow zone on the road and a link disconnection. The link disconnection is an obstacle to providing safety and infotainment services and becomes an obstacle to the deployment of the WAVE standard. In this paper, we propose a cooperative communication protocol to reduce performance degradation due to frequent link disconnection in the road environment. The proposed protocol provides contention-free data delivery by the coordination of roadside units (RSUs) and can provide the network QoS. The proposed protocol is shown to enhance throughput and delay through the simulation.

scholarly journals Distributed Data Processing in Vehicular Networks using Mobile Agents

1970 ◽  
Vol 2 ◽  
pp. 61-62
Author(s):  
Óscar Urra ◽  
Sergio Ilarri
Keyword(s):  
Wireless Communications ◽  
Mobile Agent ◽  
Open Problem ◽  
Mobile Agents ◽  
Short Range ◽  
Vehicular Networks ◽  
Vehicular Network ◽  
Agent Technology ◽  
Distributed Data ◽  
Distributed Data Processing

In a vehicular network, vehicles can exchange interesting information (e.g., about accidents, traffic status, etc.) using short-range wireless communications. Besides, the vehicles can be equipped with additional sensors that can directly obtain data from the environment. How to efficiently process and collect these data is an open problem. We argue that mobile agent technology could be helpful.

scholarly journals DDGS: A Network Coding Scheme for Dynamic Adaptation to Heterogeneous Vehicular Networks

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Zongzheng Wang ◽  
Ping Dong ◽  
Tao Zheng ◽  
Hongke Zhang
Keyword(s):  
Network Coding ◽  
Vehicular Networks ◽  
Rapid Development ◽  
Heterogeneous Wireless Networks ◽  
Vehicular Network ◽  
Time Cost ◽  
Transportation Industry ◽  
Network Resources ◽  
Bandwidth Aggregation ◽  
Coding Scheme

The rapid development of the transportation industry has brought about the demand for massive data transmission. In order to make use of a large number of heterogeneous network resources in vehicular network, the research of applying network coding to multipath transmission has become a hot topic. Network coding can better solve the problems of packet reordering and low aggregation efficiency. The determination of coding scale is the key to network coding scheme. However, the existing research cannot adapt to the different characteristics of network resources in vehicular network, leading to larger decoding time cost and lower bandwidth aggregation efficiency. In this paper, we propose a network coding scheme called Delay Determined Group Size (DDGS), which could adaptively adjust the coding group according to the heterogeneous wireless networks state. The mathematical analysis and process design of the DDGS scheme are discussed in detail. Through a large number of simulations, we proved that the DDGS scheme is significantly superior to other coding group determination schemes in terms of decoding time cost and bandwidth aggregation efficiency.

scholarly journals Malicious node identification routing and protection mechanism for VANET against various attack

2020 ◽  
Vol 20 ◽  
pp. 110-122
Author(s):  
Er. Ritika Saini ◽  
Harish Kundra
Keyword(s):  
Key Management ◽  
Traffic Information ◽  
Delivery Ratio ◽  
Malicious Node ◽  
Protection Mechanism ◽  
The Road ◽  
Emergency Situations ◽  
Road Side Unit ◽  
Private Data ◽  
Identification Mechanism

With the help of road side unit vehicles communicate among themselves. This technique termed as VANET. This network helps us to improve the safety and efficiency of the occupants during travelling in vehicles. The basic idea of this technique is to send information about the traffic information to the road side unit or other vehicles. These vehicles get safe from attacks and misuse of their private data. The objective of this paper to secure the communication among the vehicles and the road side unit. In this technique the communication mainly dependant on the safety of the road such as vehicles tracking, emergency situations and message monitoring. There are various attacks like Sybil and Gray hole attack are vulnerable to VANET. To protect from these attacks our technique provide malicious node identification mechanism that help us to provide better facility to send data to vehicles safely. To avoid these types of attacks, our propose technique include feature like key management system to prevent the communication among the vehicles. Our proposed system mostly focus on Bandwidth, packet loss and packet delivery ratio [12].

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