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Multi-hop broadcast communication is one of the main communication mechanisms to propagate safety and non-safety messages through vehicles in Vehicular Ad hoc Networks (VANETs). In our previous work, we proposed two broadcast schemes, fuzzy logic-based broadcast (FLB) and bandwidth-efficient fuzzy logic-assisted broadcast (BEFLAB). FLB offers high level of reachability where BEFLAB is more bandwidth...
We propose a multi-hop reliable broadcasting (M-HRB) scheme suitable for a wide range of vehicular ad-hoc network (VANET) applications in urban setting. Multi-hop reliability is performed using local state information. Basically, a street is divided into multiple cells to form grid-like zones. We apply a proactive local state processing scheme exploiting features of periodic beacons to estimate wireless...
In multi-hop dissemination, timer-based and probabilistic methods are high performing methods in Vehicular Ad-hoc Networks (VANETs), owing to their simplicity, low overhead and high efficiency. However, such approaches neglect the fact that vehicle transmission ranges are typically heterogeneous, which could be due to dynamic adjustment of the transmission power value. In our previous work, we introduced...
Ten years after tragically tsunami attack in Indian Ocean the situation in early warnings of stakeholder of natural disasters is dramatically improved, but still is not ideal. Following paper brings several critical views on current situation in a special aspect of Early Warning Systems — namely “last-mile” of communication channels in emergencies and special situation. It introduces possibilities...
Broadcasting is a common operation for disseminating traffic-related information in vehicular ad hoc networks. However, broadcasting in wireless networks can easily cause the broadcast storm problem especially when the vehicular density is high in the specific area. Therefore, most of the broadcast storm suppression schemes aim to decrease the number of forwarders so as to reduce the redundant packet...
Vehicular ad-hoc network (VANET) is constructed of networks using direct radio communication among moving vehicles without fixed infrastructure. Network topologies change frequently due to high mobility and communication disconnections particularly occur due to interruptions of message propagation caused by obstacles such as buildings in urban traffic environment. Therefore, a VANET routing protocol...
A large set of potential applications being designed for intelligent transportation systems (ITSs) depends on the broadcasting of information and control packets by roadside infrastructure points to vehicles in their vicinity. This paper considers the broadcast capacity of broadcast schemes and evaluates and compares the broadcast capacity of strategies based on time splitting, frequency splitting,...
In Vehicular Ad Hoc Networks (VANET) broadcasting is the key means for dissemination of safety messages. Existing broadcasting schemes, however, result in broadcast storm problem. On the other hand, setting up maximum broadcast range is another critical issue for successful communication. Based on the neighbor vehicle density, we intend to mitigate the broadcast storm problem. We also try to reduce...
Data services for in-vehicle consumption are expected to become a primary driver in the development of future vehicular networks. Due to download rate limitations of present wide-area cellular connectivity such as 3G (the likely 'pipe' to/from vehicles), direct peer-to-peer data sharing among vehicles can supplement vertical downloading. This paper studies the inter-vehicle data dissemination problem...
With the extension of wireless technology, vehicular ad hoc networks (VANETs) provide general data transmission services and emergency warning services. To rescue more drivers from being involved in an emergency event on the road, fast emergency message propagation is an important issue in VANET studies. There are two types of multi-hop broadcasting forwarder selection schemes for emergency broadcasting,...
Safety is the only way home. Broadcasting techniques have been applied widely to improve the traffic safety, especially pileup crash avoidance by sending the emergency messages to alert drivers; however, such application often suffers from the broadcast storm, hidden node, interference, and contention problem. In the paper a novel area-based broadcast protocol was proposed. Its relaying model running...
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...
To manage numerous field test data of digital broadcasting systems efficiently, field measurement systems have been integrated and become more intelligent. In this paper, we present the Integrated Measurement and Analysis System (IMAS) which manages DTV and T-DMB (Terrestrial Digital Multimedia Broadcasting) test data very efficiently. This system can measure various parameters of DTV, T-DMB as well...
A large set of potential applications being designed for intelligent transportation systems (ITS) depend on the broadcasting of information and control packets by roadside infrastructure points to vehicles in their vicinity. This paper considers the transport capacity of broadcast schemes and evaluates and compares the transport capacity of strategies based on time-splitting, frequency-splitting and...
Many of applications in vehicular ad hoc networks (VANET) are based on dissemination of information, so broadcasting is one of the fundamental services in these networks. Most of applications in VANET, especially safety applications, require broadcasting of messages with high reliability in different node densities. In this paper we propose a new broadcast method, which assures broadcasting of message...
Vehicular Ad hoc Networks (VANETs) are new network environment for intelligent transportation systems. Many of applications in VANETs are based on dissemination of information, so broadcasting is one of the fundamental services in these networks. Broadcasting in VANET is a challenging task since these networks often lack continuous end-to-end connectivity and also have different road topologies. In...
Many of applications in vehicular ad hoc networks (VANET) are based on dissemination of information, so broadcasting is a fundamental service in these networks. Broadcasting is a difficult task since vehicular networks often lack continuous end-to-end connectivity and have large variations in node densities. In this paper we present a method that improves the reception rates of broadcast messages...
Traffic congestion on major roadways costs our nation billions of dollars in lost earnings, wasted fuel consumption, injury and loss of human life. Providing motorists with real time roadway conditions is essential to mitigating traffic congestion. We propose a novel real-time messaging system that can be used to communicate imminent traffic conditions to motorists. Having such information can allow...
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