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One Unmanned Aerial Vehicle (UAV) is not efficient for carrying out search-and-rescue, reconnaissance, and surveillance because it has to make multiple back-and-forth trips across an area. The solution is to use a swarm of cooperating UAVs to form an Unmanned Aerial System (UAS). Using UASs poses the well-known problems exhibited by Mobile Ad Hoc Networks (MANETS) of frequent disconnections and high...
In times of natural or man-made disasters, missions such as safe evacuation of people from the disaster areas have critical importance. Considering large areas with limited vehicle use such as theme parks and state fairs, search and rescue of the pedestrians is a major challenge. Moreover, as an effect of disaster, damages to infrastructure may disrupt the use of Internet services. Therefore, alternative...
With the global trend towards urbanization, traffic control becomes an especially important problem. Existing ‘intelligent’ traffic control systems are usually of large scale, requiring high computation resources cost, especially equipped roads and traffic lights, and necessary legislations from governments. In this paper, we propose a framework resolves these issues by utilizing the processing power...
The development of a positioning algorithm on the board of a moving object using the information about the direction of signal reception from global system for mobile base stations. The developed system may be used as the effective and reliable method of positioning. Mobile module can help to solve all the types of positioning problems.
Motivated by studies of wireless ad hoc networks in obstructed environments, in this work we focus on the problem of establishing connectivity at an intersection of two roads, or streets, surrounded by obstacles. An instance of the problem is defined by four street segments meeting at an intersection point, a street width, a node density at each street segment and a transmission range of the communication...
In this paper, we investigate the performance of advertisement delivery scenarios of Vehicular DTN (VDTN) under highly stressed environment. The simulations for two scenarios are conducted considering obstacles (buildings), where Road Side Units (RSUs) are present or not present. We consider 802.11p standard and send bundle messages in a realistic scenario of east side of Tokyo station area in Japan...
One envisioned distinctive feature of smart cities is the interconnection among mobile users and vehicles, to support the fulfillment of location-based services. This can be obtained with centralized architectures, and with all the problems of scalability and robustness that such a solution involves. On the other hand, a more complex but more reliable, completely distributed approach can overcome...
Media streaming in automotive environments is becoming more important with the proliferation of 3G/4G technologies and the general demand for consuming Internet content in cars. Especially the rising popularity of Music on Demand and Media Cloud Storage services pushes automotive manufactures efforts to provide decent music streaming capabilities in vehicles. Two major issues have to be tackled to...
In this progressive world traffic congestion is a critical issue. It results in huge amount of time and resources loss. Vehicles in congestion is a valuable parameter for drivers to anticipate the state of congestion. The proposed approach is based on relating the relationship of different transmission ranges with vehicle density. This research work uses a GrooveNet simulator, which is based on real...
Network connectivity is a fundamental requirement for applying the vehicular ad hoc networks (VANETs) to real traffic systems. The high mobility of vehicles results in rapid changes in network topology generating dynamic variation in network connectivity. Therefore, a new approach of using Exponential Random Geometric Graphs (ERGGs) to analyze VANETs connectivity is presented considering the high...
Beacon messages are periodic 1-hop broadcast messages which are sent by each vehicle to let neighboring vehicles/infrastructures be aware of its position, speed, and change of direction. Beacon information plays a crucial role for many applications including active safety applications through which vehicles can predict the position of neighboring vehicles and be able to take instant decisions to avoid...
Vehicular Ad Hoc Network (VANET) plays a crucial role in enabling important safety applications such as emergency messages dissemination for alleviating traffic accidents and congestion in urban transportation system. Warning information dissemination is of increasing significance in urban highways due to their special topology structure. Hovering Information is a new paradigm for sharing location-aware...
In the realm of cooperative Intelligent Transportation Systems, vehicles are able to communicate with each other and with the available telecommunications infrastructure to support various safety-related services, traffic-efficiency solutions, and a wide variety of infotainment applications. As the number of mobile devices and information they need to exchange steadily increases, this will further...
The number of vehicles on roads keeps increasing continuously, making the management of traffic flow, especially in big cities more and more challenging. One of the key enablers for having smooth traffic flows and better mobility is to rely on real-time traffic monitoring systems. These systems allow road operators to implement intelligent traffic management strategies such as the dynamic adjustment...
Cars cruising for parking adds a non negligible amount to traffic congestion and CO2 pollution. Hence, good parking management policies are required to reduce such discomfort. In this paper, we address this problem from two sides. First, we consider how local parking authorities called parking coordinators (PC) can optimize the distribution of the slots they manage through a full cooperation between...
In this paper, we propose a data forwarding method for efficient data gathering in wireless sensor networks with multiple mobile sinks which freely move in the target region. In our proposed method, each sensor node forwards data packets based on information on connectivity (the status of connection with mobile sinks). As the way to share information on connectivity among neighboring nodes, we integrate...
Research works regarding vehicular communications usually obviate assessing the proposals in scenarios including adverse vehicle densities, despite such scenarios are quite common in real urban environments. In this paper, we study the effect of these hostile conditions on the performance of different schemes providing warning message dissemination. We then propose the Junction Store and Forward (JSF)...
Existing literatures [1] [2] [3] [4] show that deploying fixed relay infrastructure with stable interconnections can help to improve network connectivity. However, fixed relay infrastructure is inflexible and could be costly to deploy over large area. In this paper, we study the effectiveness of mobile relays in improving network connectivity in both Random Waypoint and Manhattan mobility models....
Targeting for providing communication services in the Intermittently Connected Vehicular Networks (ICVN) where there are no end-to-end communication and routing paths between vehicles, many relaying algorithms and routing protocol have been proposed under the assumption that vehicular nodes in the network are homogeneously distributed in the network with the same contact rate and delivery cost. However,...
Floating Car Data (FCD) consist of information generated by moving vehicles and uploaded to Internet-based control centers for processing and analysis. As upcoming mobile services based on or built for networked vehicles largely rely on uplink transfers of small-sized but high-frequency messages, FCD traffic is expected to become increasingly common in the next few years. Presently, FCD are managed...
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