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The development and evaluation of Vehicle-to-X (V2X) applications using mobile cellular networks by means of field tests is time consuming and expensive. Simulations can speed up the development and largely reduce evaluation costs. However, due to the complex nature of the network involved, it is quite difficult to be certain that the results obtained using simulation will actually match the observable...
In this keynote, we look the fundamental limits of the information propagation speed in large scale mobile and intermittently connected networks, where end-to-end multihop paths may not exist and communication routes may only be available through time and mobility. We first introduce some analytical tools to derive generic theoretical bounds for the information propagation speed in this networks....
Vehicular Cloud Computing (VCC) denotes a shared pool of computing resources in a set of wirelessly connected vehicles, which are available for on- demand and rapid access based on the pay-as-you-go fashion. VCC consolidates the benefits of Mobile Cloud Computing (MCC) and vehicular communications. Prior to the VCC concept being widely adopted, several research issues and challenges need to be carefully...
Smart vehicles have been capturing increasing attention as major providers of ubiquitous information services. In this paper, we propose a solution to enable expedited and cost-effective access of road information for vehicles as information requesters. The proposed caching-assisted data delivery with mobile requesters (CADD-MR) scheme employs caching on the data delivery path for handling later interests...
Due to exponential requests of users for accessing Internet wireless services, longer delays can incur in full filling requests. So optimizations for delay is required. One such method is using cache and storing frequently accessed pages in local cache. Consistency in cache and server data becomes a major issue. As if cache is not valid then whole optimization will be lost. Many researches have strong...
The advanced on-board vehicles' resources have given birth to the Vehicular Cloud (VC) concept. The VC is an emerging paradigm where individual mobile vehicles can be both cloud users and service providers, it enables vehicles that have sufficient resources to act as mobile cloud servers and rent out them to other vehicles. However, and with the high mobility of vehicles, user vehicles need to discover...
With an increase in the number of mobile applications, the development of mobile crowdsensing systems has recently attracted a significant attention in both academic researchers and industries. In mobile crowdsensing system, the remote cloud (or back-end server) harvests all the crowdsensing data from the mobile devices, and the crowdsensing data can be uploaded immediately via 3G/4G. To reduce the...
Timeliness is one the most important factors in emergency management. Emergency notification mechanism has to be hassle free and quick, in order to have efficient response for any disaster, health-fix, act of terrorism, etc. In this paper, we present service architecture for emergency alert, using Fog computing. Fog computing brings cloud resources close to the underlying devices and IoTs, which makes...
In this paper, we investigate the impact of mobile and stationary scattering clusters on the Doppler spectrum in wideband Vehicle-to-Vehicle (V2V) communication channels. The channel in which we simulate our model is an urban canyon oncoming environment. In the context of geometry-based stochastic channel models (GSCMs), we develop equal-delay contours for realistic modeling of location of both moving...
Cooperative downloading is an important measure for increasing the amount of data downloaded to the users of Vehicular Networking (VANET). However, data exchange causes frequent collision among cooperative vehicles and the client. To solve the problem, in this paper, we propose a transmission scheduling method. Firstly, the method builds a k-constraint routing tree according to the amount of linked...
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...
Vehicular Ad hoc Network (VANET) has been gaining the attention from the academic and industry communities due to the promising applications in road safety, traffic management and passenger comfort. However, the short vehicle-to-vehicle (V2V) communication range and the nature of vehicle mobility impose many challenges in packet routing and, accordingly, infrastructure-based applications, e.g., Internet...
This paper looks into an Intermittently Connected Roadside Communication Network (ICRCN) scenario comprising two isolated source Stationary Roadside Units (SRUs) relying on mobile smart vehicles to relay data to a destination SRU. In this case, it was shown in [1] that the downstream source SRU may suffer from a significant starvation problem. As such, a Markov decision process framework was established...
Intelligent Transportation Systems have been instrumental in reshaping transportation towards safer roads, seamless logistics, and digital business-oriented services under the umbrella of smart city platforms. Broadcasting transmission is an essential operational technique that serves a broad range of applications which demand different restrictive QoS provisioning levels. Although broadcast communication...
Vehicular ad hoc network (VANET) is a type of promising application deployed along a road for communication, safety and emergency information delivery, data collection, and entertainment. The network efficiency and stability are of great concern. We devote to achieve the communication quality by appropriate gateways. The channel randomness is taken into account in the wireless network, because it...
Vehicular ad hoc network (VANET) is needful and promising to connect the 3G network. If all vehicles communicate with the 3G network directly, it will be overwhelmed. We devote to solve the problem by mobile gateways in this paper. The channel randomness can affect the stability of the communication link, which ensures reliable dissemination of information in wireless network. We analyze the communication...
The strong potentials that exist in Vehicular Ad hoc Networks (VANETs) has given birth to the concept of Vehicular Clouds, in which cloud computing services are hosted by vehicles that have sufficient resources to act as mobile cloud servers. In this paper, we design a system that enables vehicles in a VANET to search for mobile cloud servers and discover their services and resources. Roadside units...
The Mobile Wi-Fi system using Mobile Access Points (M-APs) is a new and effective method for vehicles to access the Internet service. This paper presents an analytic model to evaluate several handoff algorithms for using M-APs in vehicular networks. The analytic results show that the best handoff strategy depends on factors such as M-AP availability or connection duration.
Delay Tolerant Network (DTN) allows data communication in a challenged network situation. Originally DTN was developed to be used in inter planetary network. Later on researchers found it suitable for developing system to deliver public services to the people living in the remote part of the developing countries. In the DTN architecture designed by IRTF researchers considered the disruptions in the...
We consider a dynamic vehicle routing problem in wireless networks where messages arriving randomly in time and space are collected by a mobile receiver (vehicle or a collector). The collector is responsible for receiving these messages via wireless communication by dynamically adjusting its position in the network. Our goal is to utilize a combination of wireless transmission and controlled mobility...
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