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Vehicular Ad-hoc Networks (VANET) is mainly discussed todeploy of ITS (Intelligent Transportation Systems) analysis and design solutions for safety, security and road traffic monitoring with better management. Through the vehicle information exchange to vehicles, road side units (RSU) and infrastructure nodes, Traffic Monitoring Center (TMC) can support incident detection monitoring and management...
In this paper, we analyze the combination of Vehicular Ad-hoc NETworks (VANETs) with the Social Internet of Things (SIoT), i.e., the Social Internet of Vehicles (SIoV). In the SIoV every vehicle is capable of establishing social relationships with other vehicles in an autonomous way with the intent of creating an overlay social network that can be exploited for information search and dissemination...
Autonomous vehicles are important to execute missions without the need to put at risk people's life. To achieve this goal, it is essential that these vehicles are endowed of a collision avoidance system. In this study we discuss the use of received signal strength (RSS) of beacons from a vehicular ad hoc network (VANET) as a way to detect dangerous approaches among autonomous vehicles. We extend this...
Vehicular ad-hoc networks (VANETs) are composed of mobile wireless communication devices on board of automobiles to help drivers in the urban traffic and on highways. In the Amazon, the waterways are the roads and the boats are the vehicles. In this paper, we investigate, through real experiments, the characteristics of links formed by boats running wireless technologies IEEE 802.11b/g in ad hoc mode...
A vehicular backbone network (VBN) has the potential to augment the Internet with high-throughput data flows for delay-tolerant traffic. High-throughput flows require a joint utilization of transportation capacity for carrying data packets through physical mobility and wireless capacity for switching data packets from one route to another. This paper establishes a model that incorporates both transportation...
Reducing the information transmission delay in the Vehicular Ad Hoc Networks(VANETs) can improve the timeliness of receiving information and avoid the happening of the accident. As a potential solution, cooperative transmission, which may effectively reduce the transmission delay by exploiting spatial diversity, has attracted lots of attentions recently. In this paper, we modeled the information transmission...
There has been a growing need to integrate communication technologies with transport infrastructure and vehicles. The proposed approach would spur an array of vehicular safety, traffic efficiency and infotainment applications. To address this, majority of the research has been focusing on IEEE 802.11p based vehicular communication. However, despite the efforts from standardization bodies and research...
Generally a Vehicular Ad-hoc Network (VANET) is considered with vehicles being the resource consumers. The other way of looking at it is arguably the vehicles as resource providers. From this we put forward the concept of vehicular network managed cloud or simply a Vehicular Cloud where the on-road safety services and the like can be assisted using In-Vehicle resources. Because of the distinct features...
Recently, geocast routing (GR) has been extensively investigated for reliable and efficient dissemination of information due to increasing number of intelligent transport system (ITS) applications favoring geocasting. In this paper, a qualitative survey of recent protocols of GR and some precise future research issues have been provided. A functional and qualitative description of each considered...
Vehicular ad hoc networks (VANETs) allow vehicles to form a self-organized network without the need for permanent infrastructure. As a prerequisite to communication, an efficient route between network nodes must be established, and it must adapt to the rapidly changing topology of vehicles in motion. Improving efficiency and fairness for City Environment becomes a hot topic own to its increasing challenge...
Data delivery in Vehicular Ad Hoc Networks (VANETs) is based on the vehicles on the roads. However, the distribution of vehicles could be affected by some external means. For example, the traffic light or pedestrian signal could block the traffic flow moving onto a road. Thus, a gap between vehicles will appear at the entrance of the road, where the distance is larger than the communication range...
The recent advances in wireless communication techniques have made possible for vehicles to download from the roadside communications infrastructure, namely drive-thru Internet. However, due to the fast-motions, harsh and intermittent wireless channels, the download volume of individual vehicles per drive-thru is quite limited as observed in real-world tests. This severely restricts the service quality...
Many protocols and mechanisms have been proposed aiming to find an alternative path towards each targeted destination in downtown and urban areas. These protocols recommend the fastest path (i.e., least congested path) without considering the services or conditions of the recommended road segments. In this work, we propose a real-time, distributed, and context-aware path recommendation protocol. The...
Road safety can be improved a lot with the help of Cooperative Collision Warning System, in which vehicles cooperate with each other for relaying safety messages to avoid accidents. Once a vehicle is in an abnormal status, which may lead to potential accidents, an emergency safety message will be generated and sent out to warn surrounding vehicles. In this paper, we address the routing problem of...
Vehicular networks have become a promising platform for large-scale urban sensing. On-demand data retrieval is a crucial operation for many applications of vehicular networks. It is particularly challenging, however, to achieve high performance of on-demand data retrieval in sparse vehicular networks. Data replication based on random linear network coding can solve the coupon collection problem but...
In this paper, we propose an efficient forwarding node selection and density estimation mechanisms for vehicular networks (VANETs). Density estimation is performed without using beacons. Basically, the transmission range is divided into segments. Then, we apply a superposition based analog signal transmission and exploit multi-user capability of OFDM to collect density in each lane and in each segment...
One of the most interesting challenges for Intelligent Transportation System (ITS) consists of the traffic congestion problem. Congestion is a big obstacle for transportation since it reduces efficiency of the infrastructure and increases travel time, air pollution and fuel consumption. Nowadays, the most promising technology in support of ITS are Vehicular Ad Hoc Networks (VANETs). In this paper,...
Data delivery in Vehicular Ad Hoc Networks (VANETs) is based on the vehicles on the roads. However, the distribution of vehicles could be affected by some external means. For example, the traffic light or pedestrian signal could block the traffic flow moving onto a road. Thus, a gap between vehicles will appear at the entrance of the road, where the distance is larger than the communication range...
As more roadside and in-vehicle sensors are deployed, variety of traffic data are becoming available in real time. These real time traffic data are shared among vehicles and between vehicles and traffic management centers through wireless communication. This course of events creates an opportunity for mobile computing and online traffic simulations. This paper presents the fundamental analytical background...
Recent advancements in sensor, mobile computing, and wireless communication technologies have created an opportunity for mobile computing and online traffic simulations. This paper presents a distributed traffic simulation framework where traffic simulation and data processing are performed in a distributed fashion by mobile computing. In this framework, communication middleware and traffic simulation...
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