scholarly journals Improving VANETs Connectivity with a Totally Ad Hoc Living Mobile Backbone

2015 ◽  
Vol 2015 ◽  
pp. 1-14 ◽  
Author(s):  
Joilson Alves Junior ◽  
Emilio C. G. Wille
Keyword(s):  
Intelligent Transportation Systems ◽  
Ad Hoc Network ◽  
Ad Hoc ◽  
Network Connectivity ◽  
Real Data ◽  
Transportation Systems ◽  
Network Backbone ◽  
Set Up ◽  
Fully Connected ◽  
Analytic Models

The vehicular ad hoc network (VANET) for intelligent transportation systems is an emerging concept to improve transportation security, reliability, and management. The network behavior can be totally different in topological aspects because of the mobility of vehicular nodes. The topology can be fully connected when the flow of vehicles is high and may have low connectivity or be invalid when the flow of vehicles is low or unbalanced. In big cities, the metropolitan buses that travel on exclusive lanes may be used to set up a metropolitan vehicular data network (backbone), raising the connectivity among the vehicles. Therefore, this paper proposes the implementation of a living mobile backbone, totally ad hoc (MOB-NET), which will provide infrastructure and raise the network connectivity. In order to show the viability of MOB-NET, statistical analyses were made with real data of express buses that travel through exclusive lanes, besides evaluations through simulations and analytic models. The statistic, analytic, and simulation results prove that the buses that travel through exclusive lanes can be used to build a communication network totally ad hoc and provide connectivity in more than 99% of the time, besides raising the delivery rate up to 95%.

Importance of the Static Infrastructure for Dissemination of Information within Intelligent Transportation Systems

2022 ◽  
Vol 24 (2) ◽  
pp. E63-E73
Author(s):  
Jiří Jelínek ◽  
Jiří Čejka ◽  
Josef Šedivý
Keyword(s):  
Communication Network ◽  
Data Transmission ◽  
Intelligent Transportation Systems ◽  
Ad Hoc Network ◽  
Information Technologies ◽  
Ad Hoc ◽  
Intelligent Transportation ◽  
Transportation Systems ◽  
Technical Solution ◽  
The Impact

Intelligent transportation systems (ITS) are a today´s hot topic, especially in the context of the development of information technologies, which can be employed in transportation. Although the scope and the technical solution of these systems may vary, they are frequently based on VANET (Vehicular ad hoc network), i.e. a communication network, which is primarily generated among the moving subjects, which form ITS. Given the highly dynamic VANET, the questions are raised as to the data transmission. This paper is aimed to make a detail analysis of the communications within VANET using the simulation model, which includes the static infrastructure of ITS and to experimentally verify the impact of this infrastructure on the dynamics of information spreading in ITS. The authors present the results obtained from a few different scenarios, which have been tested.

scholarly journals Analisis Performansi Protokol Routing Proaktif pada Jaringan Mobile Adhoc

2018 ◽  
Vol 22 (2) ◽  
pp. 120-128
Author(s):  
Rohmah Nur Hidayah ◽  
Indrabayu Indrabayu ◽  
Intan Sari Areni
Keyword(s):  
Routing Protocol ◽  
Intelligent Transportation Systems ◽  
Ad Hoc Network ◽  
Ad Hoc ◽  
Intelligent Transportation ◽  
Transportation Systems ◽  
Delivery Ratio ◽  
Packet Delivery ◽  
End To End Delay ◽  
Overhead Ratio

Intelligent Transportation Systems (ITS) menawarkan paradigma pemodelan baru yang mendukung komunikasi antar kendaraan secara real time menggunakan routing protocol yang disebut Vehicular Ad Hoc Network (VANET). Pada dasarnya kinerja routing protocol dipengaruhi oleh arus dan aturan lalu lintas yang bersifat dinamis sehingga perubahan tersebut akan menyebabkan perubahan pada kinerja routing protocol juga. Untuk itu, penelitian ini mengusulkan rancangan mobilitas realistis berdasarkan data makroskopis dan mikroskopis jalan perkotaan. Rancangan mobilitas dibagi menjadi 2 skenario berdasarkan kepadatan kendaraan, yaitu 125 dan 200 node. Penelitian ini bersifat simulasi dan dibagi menjadi 2 tahap. Tahap pertama yaitu simulasi mobilitas yang menunjukkan pergerakan kendaraan serta aturan lalu lintas yang disesuaikan dengan kondisi realistis. Tahap kedua adalah simulasi jaringan yang bertujuan untuk mengevaluasi kinerja routing protocol DSDV dan OLSR terhadap rancangan model mobilitas. Untuk menguji kinerja kedua  routing protocol, maka digunakan 3 metrik pengujian yaitu Packet Delivery Ratio (PDR), Overhead Ratio (OR) dan End to End Delay (E2ED). Hasil simulasi menunjukkan OLSR unggul pada metrik PDR dan OR, yaitu masing-masing 88.62% dan 57.11%. Sedangkan E2ED terbaik ditunjukkan oleh DSDV dengan nilai 0.523 detik. Kinerja terbaik kedua routing protocol ditunjukkan pada skenario 125 node. Hal ini menunjukkan kedua routing protocol belum mampu mengatasi kondisi lalu lintas perkotaan yang sangat padat.

scholarly journals Context-Aware Naming and Forwarding in NDN-Based VANETs

Sensors ◽  
2021 ◽  
Vol 21 (14) ◽  
pp. 4629
Author(s):  
Waseeq Ul Islam Zafar ◽  
Muhammad Atif Ur Rehman ◽  
Farhana Jabeen ◽  
Byung-Seo Kim ◽  
Zobia Rehman
Keyword(s):  
Intelligent Transportation Systems ◽  
Ad Hoc Network ◽  
Ad Hoc ◽  
Geographical Area ◽  
Transportation Systems ◽  
Vital Role ◽  
Context Aware ◽  
Vehicle Communication ◽  
Event Notification ◽  
Safety Applications

Vehicular ad-hoc network (VANET) is a technology that allows ubiquitous mobility to mobile users. Inter-vehicle communication is an integral component of intelligent transportation systems that enables a wide variety of applications where vehicles interact and cooperate with each other, from safety applications to non-safety applications. VANETs applications have different needs (e.g., latency, reliability, delivery priorities, etc.) in terms of delivery effectiveness. In the last decade, named data networking (NDN) gained the attention of the research community for effective content retrieval and dissemination in mobile environments such as VANETs. In NDN, the content’s name has a vital role in storing and retrieving the content effectively and efficiently. In NDN-based VANETs, adaptive content dissemination solutions must be introduced that can make decisions related to forwarding, cache management, etc., based on context information represented by a content name. In this context, our main contributions are two-fold: (i) we present the hierarchical context-aware content-naming (CACN) scheme for NDN-based VANETs that enables naming the safety and non-safety applications, and (ii) we present a decentralized context-aware notification (DCN) protocol that broadcasts event notification information for awareness within the application-based geographical area. Simulation results show that the proposed DCN protocol succeeds in achieving reduced transmissions, bandwidth, and energy compared to existing critical contents dissemination protocols.

scholarly journals Impact of road architecture and design on performance of city-based VANETs

2021 ◽  
Vol 11 (1) ◽  
pp. 423-436
Author(s):  
Sourav Kumar Bhoi ◽  
Sanjaya Kumar Panda ◽  
Chittaranjan Mallick ◽  
Kalyan Kumar Jena
Keyword(s):  
Routing Protocols ◽  
Intelligent Transportation Systems ◽  
Ad Hoc Network ◽  
Ad Hoc ◽  
Transportation Systems ◽  
Network Simulator ◽  
Vehicular Communication ◽  
High Speeds ◽  
Architecture And Design ◽  
The Impact

Abstract Vehicular communication is the communication between the vehicles to provide intelligent transportation systems (ITSs) services to the end users. It is the most advance and emerging wireless technology in ad hoc network. On the other hand, construction of roads has a great impact in forwarding the data to the destination. As vehicles are moving with high speeds, the architecture of roads can change the performance of routing and data forwarding in the vehicular ad hoc network (VANET). If the construction of the roads in a city area is planned with intelligent junctions, flyovers, multilane, etc., then the performance of the system increases. In this paper, we have analyzed the impact of road elements like intersections, flyovers, multilane, buildings, hills, etc., on VANET routing and find solutions for the problems related to the performance of the system. We also simulate the impact of these elements in VANET routing and analyzed the performance using OMNeT++ network simulator and SUMO traffic simulator. The performance is studied by comparing standard GSR and GPSR position-based routing protocols.

scholarly journals Lightweight Cryptographic Techniques for Automotive Cybersecurity

2018 ◽  
Vol 2018 ◽  
pp. 1-15 ◽  
Author(s):  
Ahmer Khan Jadoon ◽  
Licheng Wang ◽  
Tong Li ◽  
Muhammad Azam Zia
Keyword(s):  
Mobile Networks ◽  
Automobile Industry ◽  
Intelligent Transportation Systems ◽  
Vehicular Networks ◽  
Ad Hoc ◽  
Transportation Systems ◽  
Security Requirements ◽  
Vehicular Communication ◽  
Vanet Security ◽  
Set Up

A new integration of wireless communication technologies into the automobile industry has instigated a momentous research interest in the field of Vehicular Ad Hoc Network (VANET) security. Intelligent Transportation Systems (ITS) are set up, aiming to offer promising applications for efficient and safe communication for future automotive technology. Vehicular networks are unique in terms of characteristics, challenges, architecture, and applications. Consequently, security requirements related to vehicular networks are more complex as compared to mobile networks and conventional wireless networks. This article presents a survey about developments in vehicular networks from the perspective of lightweight cryptographic protocols and privacy preserving algorithms. Unique characteristics of vehicular networks are presented which make the embedded security applications computationally hard as well as memory constrained. The current study also deals with the fundamental security requirements, essential for vehicular communication. Furthermore, awareness of security threats and their cryptographic solutions in terms of future automotive industry are discussed. In addition, asymmetric, symmetric, and lightweight cryptographic solutions are summarized. These strategies can be enhanced or incorporated all in all to meet the security perquisites of future cars security.

Modified fuzzy-based greedy routing protocol for VANETs

2020 ◽  
Vol 39 (6) ◽  
pp. 8357-8364
Author(s):  
Thompson Stephan ◽  
Ananthnarayan Rajappa ◽  
K.S. Sendhil Kumar ◽  
Shivang Gupta ◽  
Achyut Shankar ◽  
...  
Keyword(s):  
Fuzzy Logic ◽  
Routing Protocol ◽  
Intelligent Transportation Systems ◽  
Vehicular Ad Hoc Networks ◽  
Ad Hoc ◽  
Research Area ◽  
Transportation Systems ◽  
Delivery Ratio ◽  
Greedy Routing ◽  
Hoc Networks

Vehicular Ad Hoc Networks (VANETs) is the most growing research area in wireless communication and has been gaining significant attention over recent years due to its role in designing intelligent transportation systems. Wireless multi-hop forwarding in VANETs is challenging since the data has to be relayed as soon as possible through the intermediate vehicles from the source to destination. This paper proposes a modified fuzzy-based greedy routing protocol (MFGR) which is an enhanced version of fuzzy logic-based greedy routing protocol (FLGR). Our proposed protocol applies fuzzy logic for the selection of the next greedy forwarder to forward the data reliably towards the destination. Five parameters, namely distance, direction, speed, position, and trust have been used to evaluate the node’s stability using fuzzy logic. The simulation results demonstrate that the proposed MFGR scheme can achieve the best performance in terms of the highest packet delivery ratio (PDR) and minimizes the average number of hops among all protocols.

scholarly journals Robust Filtering Techniques for RTK Positioning in Harsh Propagation Environments

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1250
Author(s):  
Daniel Medina ◽  
Haoqing Li ◽  
Jordi Vilà-Valls ◽  
Pau Closas
Keyword(s):  
Intelligent Transportation Systems ◽  
Robust Statistics ◽  
Real Data ◽  
Transportation Systems ◽  
Global Navigation Satellite Systems ◽  
Mixed Integer ◽  
Robust Filtering ◽  
Precise Positioning ◽  
The Impact ◽  
Filtering Techniques

Global navigation satellite systems (GNSSs) play a key role in intelligent transportation systems such as autonomous driving or unmanned systems navigation. In such applications, it is fundamental to ensure a reliable precise positioning solution able to operate in harsh propagation conditions such as urban environments and under multipath and other disturbances. Exploiting carrier phase observations allows for precise positioning solutions at the complexity cost of resolving integer phase ambiguities, a procedure that is particularly affected by non-nominal conditions. This limits the applicability of conventional filtering techniques in challenging scenarios, and new robust solutions must be accounted for. This contribution deals with real-time kinematic (RTK) positioning and the design of robust filtering solutions for the associated mixed integer- and real-valued estimation problem. Families of Kalman filter (KF) approaches based on robust statistics and variational inference are explored, such as the generalized M-based KF or the variational-based KF, aiming to mitigate the impact of outliers or non-nominal measurement behaviors. The performance assessment under harsh propagation conditions is realized using a simulated scenario and real data from a measurement campaign. The proposed robust filtering solutions are shown to offer excellent resilience against outlying observations, with the variational-based KF showcasing the overall best performance in terms of Gaussian efficiency and robustness.

A Comprehensive Survey of the Key Technologies and Challenges Surrounding Vehicular Ad Hoc Networks

2021 ◽  
Vol 12 (4) ◽  
pp. 1-30
Author(s):  
Zhenchang Xia ◽  
Jia Wu ◽  
Libing Wu ◽  
Yanjiao Chen ◽  
Jian Yang ◽  
...  
Keyword(s):  
Ad Hoc Networks ◽  
Intelligent Transportation Systems ◽  
Vehicular Ad Hoc Networks ◽  
Ad Hoc ◽  
Intelligent Transportation ◽  
Transportation Systems ◽  
Key Technologies ◽  
Comprehensive Survey ◽  
Hoc Networks ◽  
Graph Neural Networks

Vehicular ad hoc networks ( VANETs ) and the services they support are an essential part of intelligent transportation. Through physical technologies, applications, protocols, and standards, they help to ensure traffic moves efficiently and vehicles operate safely. This article surveys the current state of play in VANETs development. The summarized and classified include the key technologies critical to the field, the resource-management and safety applications needed for smooth operations, the communications and data transmission protocols that support networking, and the theoretical and environmental constructs underpinning research and development, such as graph neural networks and the Internet of Things. Additionally, we identify and discuss several challenges facing VANETs, including poor safety, poor reliability, non-uniform standards, and low intelligence levels. Finally, we touch on hot technologies and techniques, such as reinforcement learning and 5G communications, to provide an outlook for the future of intelligent transportation systems.

Potential Using Vehicle to Vehicle Communication Based on Wireless Fidelity (Wi-Fi) for Supporting Intelligent Transportation Systems (ITS)

2021 ◽  
pp. 61-76
Author(s):  
إسراء عصام بن موسى ◽  
عبدالسلام صالح الراشدي
Keyword(s):  
Intelligent Transportation Systems ◽  
Ad Hoc ◽  
Real Life ◽  
Intelligent Transportation ◽  
Transportation Systems ◽  
The Road ◽  
Vehicle Communication ◽  
Vehicle To Vehicle ◽  
Vehicle To Vehicle Communication ◽  
Wireless Fidelity

Vehicular Ad-hoc Network (VANET) becomes one of the most popular modern technologies these days, due to its contribution to the development and modernization of Intelligent Transportation Systems (ITS). The primary goal of these networks is to provide safety and comfort for drivers and passengers in roads. There are many types of VANET that are used in ITS, in this paper, we particularly focus on the Vehicle to Vehicle communication (V2V), which each vehicle can exchange information to inform drivers of other vehicles about the current state of the road flow, in the event of any emergency to avoid accidents, and reduce congestion on roads. We proposed V2V using Wi-Fi (wireless fidelity); the reason of its unique characteristics that distinguish it from other types. There are many difficulties and the challenges in implementing most types of V2V, and the reason is due to the lack of devices and equipment needed for real implementation. To prove the possibility of applying this type in real life, we made a prototype contains a modified toy car, a 12-volt power supply, sensors, visual, audible alarm, a visual “LED” devices, and finally a 12-volt DC relay unit. As a conclusion, the proposed implementation in spite of minimal requirements and use simple equipment, we have achieved the most important main objectives of the paper: preventing vehicles from collision, early warning, and avoiding congestion on the roads.

Sign in / Sign up

Export Citation Format

Share Document