Inter Vehicle Communication At Intersections
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Inter Vehicle Communication At Intersections
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Author : Thomas Mangel
language : en
Publisher: KIT Scientific Publishing
Release Date : 2014-07-30
Inter Vehicle Communication At Intersections written by Thomas Mangel and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-07-30 with Computers categories.
This book evaluates the ability of ad-hoc and cellular communication to enable cross-traffic assistance at intersections. Potential issues like Non-Line-Of-Sight (NLOS) reception with ad-hoc and limited capacity, higher latency and costs with cellular technology are investigated in two individual evaluations. A method for efficient information delivery via cellular systems and an inter-vehicle NLOS radio propagation model are proposed. Finally, the suitability of both technologies is compared.
Inter Vehicle Communication At Intersections
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Author : Thomas Mangel
language : en
Publisher:
Release Date : 2012
Inter Vehicle Communication At Intersections written by Thomas Mangel and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Cams categories.
Adaptive Traffic Signal Control System Based On Inter Vehicular Communication
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Author : Nitin Maslekar
language : en
Publisher:
Release Date : 2011
Adaptive Traffic Signal Control System Based On Inter Vehicular Communication written by Nitin Maslekar and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
Traffic signal control, which is an integral part of Intelligent Transportation System (ITS), plays an important role in regulating vehicular flow at road intersections. With the increase of vehicular traffic, there has been a significant degradation in the functional efficiency of signal systems. Traditional systems are not capable of adjusting the timing pattern in accordance with vehicular demand. This results in excessive delays for road users. Hence it is necessary to develop dynamic systems that can adjust the timing patterns according to traffic demand. Of the various available techniques, Vehicular Adhoc Networks (VANETs) are attracting considerable attention from the research community and the automotive industry to implement dynamic systems. In this context, exchanging data among vehicles is one of the key technological enablers through which the density of vehicles approaching the intersection can be predicted. This requires extensive collaboration between vehicles. Inherent properties and limitations of VANETs, distributing information among the vehicles is a very challenging task. In this thesis, an adaptive traffic signal control system based on car-to-car communication (VANETs) is proposed. To achieve this, a data dissemination technique titled, Clustering in DiRectIon in Vehicular Environment (C-DRIVE) is implemented. In C-DRIVE, the formation of clusters is based on the direction metric. Precisely this metric defines the direction a vehicle will travel after crossing the intersection. To attain stability within the clusters and to have accurate estimation of the density of vehicles, two policies are adapted. In the first policy, a clusterhead switching mechanism is defined. In the second method, termed as Modified C-DRIVE (MC-DRIVE), the clusterhead election policy is modified. In this modification the election policy is based on the stable cluster length. Once the clusters are formed, the elected cluster head will compute the density in its clusters and transmits the information to the traffic signal controller (TSC). With the density information of different lanes approaching the intersection, at the TSC an optimal cycle length is computed using the modified Webster's model and based on the demand, required green splits are allotted to the various phase. The efficiency of this method is advocated through simulation results which show that the waiting time for vehicles and queue length at intersections are considerably reduced. It is also shown that the proposed solution is collision free at intersections. The proposed system is compared with a classic pre-timed system and an adaptive fuzzy logic system. The simulations also show that the data convergence time and the communication delay between vehicles and traffic signals do not compromise the efficiency of the system.
The Impact Of Inter Vehicle Communication On Vehicular Traffic
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Author : Moritz Killat
language : en
Publisher: KIT Scientific Publishing
Release Date : 2014-10-16
The Impact Of Inter Vehicle Communication On Vehicular Traffic written by Moritz Killat and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-10-16 with Communication and traffic categories.
The work addresses communication networks established over radio equipped vehicles in our everyday road traffic, so called Vehicular Ad Hoc Networks (VANETs), and discusses their impact on two major goals, namely traffic safety and traffic efficiency. For both objectives, the thesis proposes an appropriate modeling of the essential building blocks Traffic, Communication and Application and enables impact assessment studies by means of implemented simulation tools.
The Impact Of Inter Vehicle Communication On Vehicular Traffic
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Author : Moritz Killat
language : en
Publisher:
Release Date : 2009
The Impact Of Inter Vehicle Communication On Vehicular Traffic written by Moritz Killat and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Communication categories.
Applications Of Wireless Communication In Traffic Networks Using A Hierarchical Hybrid System Model
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Author : Yiting Liu
language : en
Publisher:
Release Date : 2007
Applications Of Wireless Communication In Traffic Networks Using A Hierarchical Hybrid System Model written by Yiting Liu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.
By employing the hierarchical hybrid system model, we develop microscopic traffic simulators that make it possible to analyze, test and evaluate different vehicle operation control policies and traffic management strategies.
Inter Vehicle Communication Systems Improvement
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Author : Najmeh Khosroshahi
language : en
Publisher: LAP Lambert Academic Publishing
Release Date : 2014-03
Inter Vehicle Communication Systems Improvement written by Najmeh Khosroshahi and has been published by LAP Lambert Academic Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-03 with categories.
The main goal of intelligent transportation systems (ITS) is to improve traffic efficiency and mobile safety. The Dedicated Short Range Communication system (DSRC) standard based inter-vehicle communications system plays a key role in ITS [1]. In October 1999, the Federal Communications Commission (FCC) allocated the frequency spectrum between 5.850 and 5.925 GHz for DSRC, which will enable vehicles to communicate with the road infrastructure, and allows for a large number of ITS applications. This provides an opportunity for automakers, government agencies, and related commercial entities to improve highway safety. However, inter-vehicle communications must operate effectively within transmit power limits and under received signal strength uctuations and Doppler spread. Conventionally, Convolutional coding was employed for forward error correction (FEC);however, in this book, we consider DSRC performance using Low Density Parity Check (LDPC) codes and Quasi-Cyclic (QC)-LDPC codes under different channel conditions. Results show that a QC-LDPC code provide an attractive trade off between performance and complexity, and should be considered as an alternative for DSRC systems.
Simulating A Universal Geocast Scheme For Vehicular Ad Hoc Networks
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Author : Benjamin L. Bovee
language : en
Publisher:
Release Date : 2011
Simulating A Universal Geocast Scheme For Vehicular Ad Hoc Networks written by Benjamin L. Bovee and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Radio categories.
Recently a number of communications schemes have been proposed for Vehicular Ad hoc Networks (VANETs). One of these, the Universal Geocast Scheme (UGS) proposed by Hossein Pishro-Nik and Mohammad Nekoui, provides for a diverse variety of VANET-specific characteristics such as time-varying topology, protocol variation based on road congestion, and support for non line-of-sight communication. In this research, the UGS protocol is extended to consider inter-vehicle multi-hop connections in intersections with surrounding obstructions along with single-hop communications in an open road scenario. Since UGS is a probabilistic, repetition-based scheme, it supports the capacity-delay tradeoffs crucial for periodic safety message exchange. The approach is shown to support both vehicle-to-vehicle and vehicle-to-infrastructure communication. This research accurately evaluates this scheme using network (NS-2) and mobility (SUMO) simulators, verifying two crucial elements of successful VANETs, received packet ratio and message delay. A contemporary wireless radio propagation model is used to augment accuracy. Results show a 6% improvement in received packet ratio in intersection simulations combined with a decrease in average packet delay versus a previous, well-known inter-vehicle communication protocol.
Evaluation Of Inter Vehicle Communication In Traffic Networks
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Author : Yiting Liu
language : en
Publisher:
Release Date : 2003
Evaluation Of Inter Vehicle Communication In Traffic Networks written by Yiting Liu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
Vehicle To Vehicle Communications For Safer Intersections
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Author : Ozan K. Tonguz
language : en
Publisher:
Release Date : 2013
Vehicle To Vehicle Communications For Safer Intersections written by Ozan K. Tonguz and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with Electronic traffic controls categories.