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In recent years the number of automobiles have been increased on the roads. Due to high density of vehicles, the potential threats and road accidents are increasing. Alongside new application domains are evolving such as infotainment. VANETs is an emerging technology where the information is exchanged among the vehicles on the road to provide updates about different road situations and dangerous conditions,...
In recent works, a priority-aware deterministic access protocol that is based on 802.11p/DSRC was introduced to allow vehicles to access the shared medium in collision-free periods. The VANET Deterministic Access (VDA) protocol as introduced in [8] has no mechanism that prevents a non VDA-enabled vehicle from accessing the channel in a scheduled VDA opportunity (VDAOP). A non VDA-enabled vehicle,...
Vehicular Sensor Network (VSN) is being seriously considered as a key enabling technology as it allows vehicles to communicate with each other (v2v) and/or with roadside infrastructure (v2r). Effectively use of wireless communication can enhance various types of traffic applications. Dedicated Short-Range Communication (DSRC) standard is an ideal candidate for supporting wireless access in VSN environment...
The medium access control protocol of a future vehicular ad-hoc network is expected to cope with highly heterogeneous conditions. An essential parameter for protocols issued from the IEEE 802.11 family is the minimum contention window used by the backoff mechanism. While its impact has been thoroughly studied in the case of wireless local area networks, the importance of the contention window has...
Vehicular networking is nowadays very hot topic within the research field of telecommunications. Lot of different approaches exist, although the standard approach called IEEE 802.11p is gaining the majority of interest. Even if IEEE 802.11p seems to be the main approach, the operability in real conditions has not yet been under careful consideration. This paper presents the vehicular networking simulations,...
Ad-hoc multi-hop broadcast protocols are usually used in vehicular networks to provide safety services. However, these protocols face several issues, namely broadcast storms, hidden nodes, and message delivery failures, that prevent safety applications from guaranteeing their required high message delivery ratio and low delays. In this paper, we tackle these issues using a novel cluster-based contention-free...
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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