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This paper addresses the challenge of vehicle selection in a Vehicular Ad-hoc Network (VANET) used to assist vehicles with limited satellite visibility in urban environments. In [1], we proposed a Non-Range cooperative positioning system which uses pseudoranges from only one assisting vehicle at any given time. However, many vehicles are within the communication zone of the target vehicle especially...
We propose a novel unified radio frame structure and medium access control (MAC) protocol for low-latency and highly reliable vehicle-to-X (V2X) communications. The radio frame structure enables short latency transmission and the unified device-to- device (D2D) communication for V2X services. The unified MAC protocol simultaneously enables the cellular-assisted and ad-hoc D2D communications to enable...
Vehicular ad hoc networks have received considerable attention in recent years. Being a subclass of mobile ad hoc networks, VANETs have some different characteristics than MANETs such as, fast moving nodes and frequent disconnections in the network. Existing routing protocols of MANETs do not perform well under these dynamic conditions in VANETs. We present a two-level hierarchical routing protocol...
The automotive industry is under a major change and new vehicles are being enriched by the recent advances in communication. Not only business plans are changing due to connected and urbanized lifestyle, but also transportation is becoming more intelligent with smart roads that connect smart cars. Technology coined as the vehicular ad-hoc network (VANET) is harmonizing with Intelligent Transportation...
Named Data Networking replacing the TCP/IP architecture has emerged as a state-of-the-art tendency in VANETs because of its high efficiency in content distribution and Vehicle-to-Vehicle (V2V) communications. After this paradigm shift in VANETs, the traditional gateway selection algorithms and Peer-to-Peer content downloading protocols become inappropriate for vehicles to cooperatively acquire big-size...
In this work we investigate the benefits of an hybrid architecture integrating both mobile roadside units, and stationary roadside units supporting the operation of vehicular networks. Since traffic fluctuates, an architecture employing just stationary roadside units might not be able to properly support the network operation all the time. Similarly, an architecture composed just of mobile roadside...
For information dissemination in highly dynamic vehicular networks, two technological approaches can be considered: Cellular communication standards are continually evolving to incorporate the requirements of vehicular applications. An alternative is ad-hoc communication which is restricted to direct, short range communication between vehicles/road-side units. Currently, no single technology can fulfill...
Intelligent Transportation Systems (ITS), supporting the development of innovative vehicular applications, have benefited from major contributions in the field of wireless networking. Broadcasting is a crucial communication type for many domain-specific applications. In this work we focus on analytical modeling of multi-hop broadcast in vehicular networks and quantify its performance in terms of relevant...
Vehicular ad-hoc networks (VANETs), an important communicational infrastructure and essential component of Intelligent Transportation System (ITS) used for virtual warnings can be effectively used through connectivity-aware geocasting in intersection based urban traffic environment. Road safety and security can be enhanced remarkably by incorporating traffic signal values and predicting the probability...
In research community vehicular networks are very popular these days as in many countries vehicles are interested in downloading and updating data at Road Side Units (RSUs). As RSUs are used as router to forward data of vehicles to outside world and RSUs are also equally used as buffer points to forward data of one vehicle to other vehicles moving across the road. In the proposed work RSUs are used...
In this paper we propose a security system to protect external communications for self-driving and semi self-driving cars. The proposed system can detect malicious vehicles in an urban mobility scenario. The anomaly detection system is based on fuzzy petri nets (FPN) to detect packet dropping attacks in vehicular ad hoc networks. The experimental results show the proposed FPN-IDS can successfully...
This paper considers the task of deploying mobile wireless repeaters on aerial vehicles in the upper air of Earth to increase the Internet connectivity of users with little to no network infrastructure. By routing data between a user and a strong connection to the Internet through the vehicle network, this ad hoc infrastructure can provide Internet access to those currently without it. We consider...
Vehicular ad-hoc networks (VANETs) are an emerging type of networks which facilitates vehicles on roads to communicate for driving safety. The concern of security and privacy is raised in this scene. Messages should be signed and verified before they are trusted while the real identity of vehicles should be anonymous, and should be traceable by the authorized party when accident investigation. In...
The research of vehicular networks has been studied for many years. In actual life, there are a few implementations of V2X communication system, majority of them are extremely expensive. Most importantly, detailed insight implementation procedure hasn't been provided for researches. In this paper, an efficient V2X communication system based on the IEEE 802.11p/1609.X protocol stack, also known as...
Recently, there has been significant research focus on smart cities and how to use resources efficiently. Parking space, in particular, is scarce in most metropolitan areas and intelligent systems are required to coordinate parking. This paper presents a wireless system for locating parking spots remotely via a smartphone, and a wireless sensor node which determines if parking spots are vacant or...
The technology based ubiquitous patient monitoring is regarded as a viable solution for managing the chronic diseases and medical emergencies in order to economize the healthcare services. The reliability of end to end communication between patients and healthcare services in wireless patient monitoring is the critical requirement in such systems irrespective of time and location dependencies. In...
An ad hoc network is a suburbanized types of wireless network. The ad hoc which means “for this purpose” formed network instantly when nodes are connected in network for communication. Ad hoc network is a temporary network built for specific purpose. It does not require any pre-established infrastructure. The dynamic nature of ad hoc networks makes them more utilisable. On the other hand, selfish...
In a mobile IoT system, IoT devices are located in a moving vehicle such as in a car, in a mobile robot or in an Unmanned Aerial Vehicle (UAV). An IoT Gateway aggregates data from various IoT devices located in a moving vehicle and its surroundings. This GW could also be located in the vehicle itself. We consider infrastructure as well as ad-hoc mode scenarios here. In infrastructure mode, this mobile...
Various vehicular applications are available in VANETs either for safety-related or non-safety-related use. Collision warning and car crash alerts are those of the most important messages that own high priority to be rebroadcast than any non-safety messages. Meanwhile among non-safety messages that employs text, images and streaming packets containing voices and videos, the bandwidth must be distributed...
The effective placement of intelligence, surveillance and reconnaissance (ISR) assets in a sensor network for optimal situational awareness is an important area of military operations research. The sensor network placement optimization problem is a type of assignment problem where possible sensor locations can be assigned sensors of different types (or no sensor). We apply a genetic algorithm to the...
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