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Vehicular networks can generate a large amount of vehicular data which are useful to both car consumers and manufacturers. In this paper we propose to collect vehicular data and to mine vehicular data by using data mining models. The experiment results shows the proposed methods are effective.
Due to the rapidly changing topology of vehicular ad hoc network (VANET), it requires the routing protocol can be able to find out comparatively more stable routes. But the routing protocols in existence are not taking the distinguishing features of vehicles and roadway into consideration, and this brought about challenges to these routing protocols' applicability in VANET. In this paper, we take...
Roadside units (RSUs) aided certificate service is a promising approach for ensuring security and privacy preservation in vehicular ad hoc networks (VANETs). In existing approaches, a vehicle can update certificate only when it passes by RSUs, however, this is impractical in many scenarios. Consequently, if there are no RSUs on the original driving trip, drivers have to adjust routes which means wasting...
In this paper, we reveal several characteristics of a broadcast communication protocol called DSCF (Directional-Store-Carry-Forward). In recent years, realization of VANETs (Vehicular Ad-hoc Networks) has been demanded for delivering information to vehicles at a low cost. In VANETs, a vehicle may or may not find other vehicles within its radio communication range because of vehicles' mobility, which...
Network quality of VANET (Vehicular Ad-hoc Network) is usually bad due to speed variation, high mobility, driver behavior, traffic density, swarm effect, environment complexity, et al. Speed variation dynamically changes the car-to-car distances frequently and results in broken connections. Besides, VANET's network topology usually deployed along with the roadside, the nearby car is very probably...
As a technology to improve safety, efficiency and convenience in transportation, vehicular ad hoc networks(VANETs) attract more and more attentions of researchers. VANETs will achieve a series of applications by periodically broadcasting beacons containing vehicular status information such as position, velocity and direction. However, some attackers might also utilize the information to track users'...
Multi-hop broadcast is a key technique to disseminate important information such as time-sensitive safety warning messages (WMs) in Vehicular Ad hoc Networks (VANETs). Due to the fact that the implementation of broadcast at the link layer uses unreliable transmissions (i.e., lack of positive ACKs), highly reliable, scalable, and fast multi-hop broadcast protocol is particularly difficult to design...
Search indices for distributed information are an important building block for many mobile, decentralized applications. However, the network load caused by nodes registering their information in the index can become quite significant especially in mobile networks like vehicular ad-hoc networks (VANETs), where nodes need to register periodically due to their mobility. Our goal in this paper is to encode...
In vehicular ad-hoc networks, status update messages are used to disseminate vehicle state information so that each vehicle can track movements of its neighbors. In this paper, we focus on the aggregated power level from this kind of active safety messages and its impact on DSRC channel quality. With macroscopic model and LWR (Lighthill-Whitham-Richards) PDE, we show how the probability distribution...
Vehicular ad-hoc networks (VANETs) are promising for more and more intelligent transportation applications, where information is disseminated over a group of vehicles. VANETs are characterized for its unstable framework, in which the isolated vehicles communicate with others only when the unexpected meetings occur. As a result, some available data dissemination schemes do not work well in VANETs....
We present a distributed fast protocol for broadcast in ad hoc vehicular networks, and the results of a set of experiments that we carried to test it. Our proposal, called FROV, gains optimal performance in very reasonable real scenarios. These scenario are challenging and were not extensively studied in literature. In particular, we consider individual and variable transmission ranges of the vehicles...
The advances in research on ad hoc networks, the availability of cheap radio interfaces (e.g. WiFi) and the increasing amount of electronic devices installed in vehicles have set the path for vehicular ad hoc networks. In the past few years, vehicular ad hoc network (VANET) research has addressed all layers, trying to optimize from the physical layer to the application layer to support the design...
Epidemic or gossip-based algorithms have been proposed for data dissemination in vehicular networks. Due to the unfeasibility of deploying large size vehicular networks, the performance evaluation of these algorithms is usually based on simulations. However, most literature works present experimental results based on hyper-simplified and non-realistic mobility scenarios or do not adequately describe...
Obstructions between communicating pairs reduce the reliability of data transfer in high frequency wireless networks, for which vehicular ad hoc networks serve as an emerging example. In this paper we introduce a geometric framework which enables us to analyze the effect of obstacles on the capacity of such networks. Towards this goal, we introduce concepts from combinatorial geometry (such as hidden...
Privacy, authentication, confidentiality and non repudiation are the most desired security attributes for all vehicular ad hoc network (VANET) applications. A lot of solutions have been presented to address these issues. However, they are mostly dependent on centralized certificate architecture and some sort of hardware-based security. These solutions are expensive to carry out and lack the incentive...
The availability of efficient location system receivers, numerous calculation techniques of the relative coordinates and the need to design an efficient and a scalable network are the main reasons for geographical information usage in vehicular networks (VANET). IPv6 is considered as the most appropriate technologies to support communication in VANET thanks to its extended address space, enhanced...
In vehicular ad hoc networks (VANETs), the malicious messages and tampered messages threat other drivers' life or confuse the traffic order possibly. The anonymity has to be traceable when the law enforcement authority wants to figure out the accountabilities about the anonymity. We describe the problem that characterizes the privacy of VANETs and proposes a new anonymous key mechanism with a system...
Connectivity analysis of Vehicular Ad Hoc Networks (VANETs) involves the study of static and dynamic characteristics of the network. Realistic mobility models are essential for both aspects, in order to produce valid configurations of the position of vehicles in one static instant, and to dynamically move such vehicles in an interval of time. Focusing on static connectivity evaluation, we extend the...
With the rapid development and the extensive application of Vehicle Ad Hoc Networks (VANET), the problem of ensuring the credibility of accessing VANET has gained more and more attentions. In the view of the characteristics that the rough set theory is good at handling uncertainly information, we proposed a new approach to access VANET based on rough set theory. We introduced the Mobile Trusted Module...
This paper addresses the problem of sustaining the privacy of a vehicle in a vehicular ad hoc network (VANET). In a VANET, vehicles broadcast information as they move on the road. The location of a vehicle can estimated using localization techniques and its identity can be read from its messages. A link can be established between the physical vehicle through localization and its identity is a threat...
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