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Supporting QoS for safety-critical applications for intelligent transportation systems accentuates the analytical modeling of delays in vehicular networks. Such analysis is, however, challenging due to the dynamics of such a network. We make progress by deriving lower- and upper-bounds for information dissemination delays in multi-hop vehicular networks using two different routing schemes. In particular,...
Recently, there have been large numbers of research related to ITS (Intelligent Transport System). The major specification to realize ITS network is RC-005 using band frequency 5.8GHz. However it is difficult to connect if something disturbs Line-of-Sight (LOS) between communication devices due to characteristic of radio. In this paper, we propose a communication system based on approaches of temporal...
In vehicle-to-vehicle environment, vehicles interchange traffic data with each other. In this paper, three sampling methods in data stream theory are exploited in order to construct summarizations for these original data, since the original data are potentially unbounded in size and are impossible and unfeasible to be stored directly on the disk. Then traffic states, such as speed on any road, can...
This paper presents a video demonstration of a platform for data dissemination for vehicular Networks developed by France Telecom R&D. The aim of this platform is to disseminate infotainment information (e.g. advertisement applications, etc.) in a predefined zone. This platform is based on an optimized dissemination protocol called ROD (Road Oriented Dissemination).
The innovation in wireless technology is to support in the areas of Intelligent Transport System (ITS). Wireless technology can be used in Vehicle-to-Vehicle and vehicle-to-infrastructure in transport applications. ZigBee is the key protocol for sensor network applications because of the long battery life, low-cost for installation, eases maintenance and small footprint. ZigBee enables mesh networking...
The vehicular mobility models will seriously affect the simulation results of the key technologies for Vehicular Delay Tolerant Networks. Most of the existing vehicular mobility models are synthetic mobility models which cannot properly reflect the real environment. This paper proposed vehicular mobility model based on real traces, which has considered the road topology, the vehicle speed control...
Non-recurring roadway traffic incidents are a part of everyday life that impedes normal traffic flow. One of the major challenges is to reroute traffic around incidents in order to maximize throughput. This often comes up when an incident occurs on a freeway and alternate routes need to be utilized on city and residential streets. Today's navigational devices can be used to find alternate routes based...
Study of high speed radio wave characteristics is significant for development of High-speed mobile communication technology. According to the mobile radio propagation characteristics, a method of measurement of these characteristics is proposed in this paper. Based on the sophisticated measurement instruments and the virtual instrument technology, the high speed measurement system is established and...
The Intelligent Transportation Systems (ITS) currently attract a lot of attention. Many simulators and some testbeds have been proposed to validate new ideas and to guide new theoretical developments. Yet, to this date, simulator tools and testbeds evolve in disjoint research work. We developed Airplug-ns, an open source simulation environment, as a step towards bridging this gap. This environment...
Many applications and protocols are planned for the so-called Intelligent Transportation Systems (ITS). Most of them are supposed to work in dynamic networks, such as the vehicular ad hoc networks (VANET). However, designing and studying distributed applications and protocols in such networks is not easy. Analytical studies suffer from the lack of pertinent models. Simulations are often far from reality...
The complexity and connectivity of modern vehicles has constantly increased over the past years. Within the scope of this development the security risk for the in-vehicle network and its components has risen massively. Apart from threats for comfort and confidentiality, these attacks can also affect safety critical systems of the vehicle and therefore endanger the driver and other road users. In this...
We define an ad hoc transportation system as one that has no infrastructure such as roads (and lanes), traffic lights etc. We assume that in such a system the vehicle are autonomic and can guide and direct themselves without a human driver. In this paper we investigate how a safe distance can be maintained between vehicles. A vehicle which has been compromised by an adversary can cause serious chaos...
The simulation of intervehicle communication (IVC) in a Vehicular Ad-Hoc Network (VANET) requires the modeling of traffic movement patterns and the simulation of wireless communication between the vehicles which act as mobile nodes within the wireless network. This paper discusses the calibration and fitness of the JIST/SWANS network simulator for use in hybrid VANET simulation using readily available...
Vehicular wireless networks have emerged as a promising wireless communication technology in recent years. Vehicular wireless networks collect information on real-time traffic, such as the road situation, the location of a car accident, etc., which must be delivered to its destination before a set deadline in order to be useful for an Intelligent Transportation System (ITS). Target applications are...
Bus lane enforcement system aims to monitor illegal utilization of bus lane by non-permitted vehicles (violator). However, Road-side system leads to considerable infrastructure cost while bus mounted system has limited surveillance coverage. In this paper, we consider an interesting problem in bus mounted system: how to improve the surveillance coverage of bus mounted system without additional infrastructure...
Vehicular Ad Hoc Network (VANET) is an emerging new technology and a promising platform for the Intelligent Transportation System (ITS). The most important application of VANET is disseminating emergency messages to warn drivers in case of dangerous events. The core technique relies on the design of a broadcast scheme. In this paper, we propose a street-based broadcast scheme that is suitable for...
Geographic group communication is a promising technique for collaborative driving applications. While one-way, geographic broadcast (geocast) is well-studied in vehicular networks, there has been little work to address the challenging reliability problems that arise. Not only do vehicular networks experience highly variable packet loss, but communication failures are difficult to detect. The presence...
Vehicular ad hoc networks (VANETs), similar to other distributed systems, often require a scalable time synchronization service enabling data consistency and coordination. In this paper, we propose a new time synchronization protocol for VANETs, which provides excellent scalability, accuracy and robustness for high mobility traffic scenarios. The new protocol, Converging Time Synchronization (CTS),...
The concept of Intelligent Transportation Systems (ITS) presents new research and development challenges in the transportation and ICT (Information and communication technologies) sectors and is currently receiving considerable interest from the research community. Accurate simulation of wireless vehicular communications for large-scale system testing is heavily reliant on the precision of the underlying...
The ability to realize an Intelligent Transportation System (ITS) to improve driver safety has attracted huge interests from researchers this decade. Vehicular Communication covering vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I) communication supported by ITS provide ubiquitous internet connectivity among the vehicles to improve safety for drivers. In addition to carrying driver safety...
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