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We propose D2-ITS, a flexible and extensible framework to dynamically distribute network control to enable message dissemination in Intelligent Transport Systems (ITS). By decoupling the control-from the data plane, D2-ITS leverages network programmability to address ITS scalability, delay intolerance and decentralization. It uses a distributed control plane based on a hierarchy of controllers that...
The continuous transfer of messages in vehicular ad hoc networks leads to a heavy network traffic load. This causes congestion in the wireless channel which degrades the reliability of the network and significantly affects the Quality of Service (QoS) parameters such as packet loss, throughput and average delay. Therefore, it is vital to adapt the transmitting data rates in a way that ensure that...
VANET and cognitive radio network (CRN) are both new emerging technologies in wireless networking. The application of CR concept in wireless communication systems for intelligent vehicles has been envisioned as a promising idea towards solving the problem of scarce spectrum. This paper discusses CR technologies for VANETs aimed at opportunistic spectrum access (OSA) for improved vehicular communication...
For disconnected Vehicular Ad hoc NETworks (VANETs), the carry-and-forward mechanism is promising to ensure the delivery success ratio at the cost of a longer delay, as the vehicle travel speed is much lower than the wireless signal propagation speed. Estimating delay is critical to select the paths with low delay, and is also challenging given the random topology and high mobility, and the difficulty...
In Vehicular Ad Hoc Networks (VANETs), a vehicle could be identified and tracked by eavesdropping its messages (e.g., beacons) by an adversary, since these messages contain personal information such as the location of the vehicle. This attack leads to threats on the user's location privacy. Frequent changing pseudonyms are accepted as a solution to protect the location privacy of users in VANETs....
The development of wireless Vehicular Ad-Hoc Network (VANET) aimed to enhance road's safety and provide comfortable driving environment by delivering early warning and infotainment messages. Intentional jamming attacks target at undermining such a goal by disrupting wireless communications. While detecting jamming attacks is important towards enhancing road safety, it is challenging because VANET...
To provide a more practical analysis for performance of the VANETs (vehicular ad hoc networks), we propose a novel analysis model based on clustering. Because of the low-density deployment of the vehicles which equipped with VANET, and the effect of vehicular mobility, in the real traffic scenario, moving vehicles are divided into clusters. The proposed analysis model takes full account of the vehicles...
Platooning is an important mechanism to increase the capacity of roads and the efficiency of driving. Vehicular ad hoc networks (VANETs) can enhance the performance of platoons. In this paper, a novel mechanism that selects a leader vehicle autonomously for a platoon based on relative mobility information of vehicles is proposed for overcoming the restriction on vehicles and for facilitating platoons...
Intelligent Transportation System (ITS), the safety-related message is propagated based on the wireless communications through vehicle to vehicle (V2V) and vehicle to infrastructures (V2I) in vehicular Ad hoc networks (VANETs) environments. Hence, the network connectivity is a key requirement for successfully safety-related message propagation. In this paper, we analyze the influence of vehicle density...
Vehicular ad hoc networks (VANETs) are relegated as an application of mobile ad-hoc network (MANET) which encourages vehicles on road to impart for driving wellbeing. VANETs have been developed to turn the consideration of specialists in the area of wireless and mobile communication. VANETs endures security dangers as different systems, it is unmanageable to keep information secure and personal. Preserervation...
Inter-vehicular communications is seen as a promising solution to a number of issues related with public road safety, road congestion management, and infotainment. However, Vehicular Ad-hoc NETworks (VANETs) characterized by high mobility of vehicles and facing a number of other issues related with high frequency wireless communications and network disconnections, encounter major challenges related...
Every year, the number of traffic accidents in the world may increase as the number of vehicles. These was caused by improper use of vehicles such as the location awareness of road users to obey traffic signs or a lack of tolerance or mutual respect fellow road users. Wireless communication between vehicles is expected to help reduce the number of accidents. In the near future the vehicle can be used...
VANET (Vehicular Ad hoc Network) is a special kind of ad hoc network in which each vehicle is regarded as a communication unit, which has attracted lots of attention in recent years. Vehicle's movement is restricted by road and environment in VANET, while traditional random mobility model and way-point mobility model can't reflect the realistic vehicle traces. How to evaluate wireless routing protocol...
In the future, VANET and IEEE 802.11p will play important role in ITS with many applications that improve the quality of traffic. Road environment is one of factors that influences the performance of the wireless communication. Especially for blind corner, the buildings which obstruct the signal may be a big challenge for the data transmission of safety applications. Thus, the performance analysis...
The need to improve road traffic management is evident worldwide. Growing congestions on the roads along with a gradual increase of pollution and concern for improving traffic safety have prompted to explore the potential of the Intelligent Transportation Systems through numerous research projects funded by public entities and/or the automotive industry. However, due to various reasons, including...
Nowadays, wireless communication technologies have high influence on our daily lives. The vehicular ad hoc networks (VANETs) is now evolving quickly and attract attention from road operators, car manufacturers and governments. We unveil a fine traffic flow optimization method with VANETs. On the macroscopic level, our model identifies road segment profiles. On the microscopic level, vehicles send...
This paper describes Cost-Awareness Multicast forwarding (CAM), focus on the transmission cost and the efficient multicast data forward in VANETs. Application of the navigation system, we assume only a central center has the planning path of each vehicle and the current location and speed of the vehicle supported by GPS. Once, the source vehicle need to send data to multicast group vehicles. The speed,...
In vehicular adhoc networks abbreviated as VANETS vehicles are furnished with radio devices which qualify them to interchange traffic information without the requirement of any kind of infrastructure [3-6]. However the understanding of vehicle headway distribution is crucial for evaluating the probable range of connectivity in these vehicle ad hoc networks. Several studies on dissemination of vehicles...
Clustering in vehicular ad hoc networks (VANETs) is a challenging issue due to the highly dynamic vehicle mobility and frequent communication disconnections problems. Recent years' research have proven that mobility-based clustering mechanisms considering speed, moving direction, position, destination and density, were more effective in improving cluster stability. In this paper, we propose a new...
Over the last two decades, traffic congestion has become a "worldwide" phenomenon as a result of increased motor vehicles and population growth. Emerging wireless technologies, such as Radio Frequency Identification (RFID) networks, have a significant impact on improving the efficiency of the road traffic management system in Alexandria. In this paper, we propose an intelligent road-traffic-management...
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