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In this paper, a new wireless network simulator is proposed. The purpose of the proposed simulation model is to easily analyze the performance of WAVE protocol under various vehicular communication scenarios. The framework of the proposed simulator is designed based on the Event Driven Scheduling (EDS) approach. The proposed simulator is designed to support characteristics of WAVE protocol. Enhanced...
The aim of this paper is to analyze efficient message relay methods in vehicular ad hoc networks (VANETs). Safety applications installed in vehicles aim to send a warning message to all reachable network vehicles as soon as possible. There are several broadcast methods for disseminating messages. We implement each broadcast method and compare methods. We evaluate the reliability and performance of...
Vehicle to Vehicle(V2V) is an important communication medium for safety and comport of drivers. Accordingly, V2V researches based on IEEE 802.11p standard is being actively investigated in many countries. V2V researches which is fors and againsts per each study from many simulation as well as the vehicle test is being conducted. Among them, we especially need to use NS2 which is simulator similar...
Vehicular ad-hoc network (VANET) is the one of core technologies that provides various services in intelligent transportation systems (ITS). Major services provided with multi-hop broadcasting communication are emergency warning service, forward collision warning service, and traffic information service. Frequent disconnections and low throughput due to high mobility of vehicles, fluctuant density...
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...
The IEEE 802.11p wireless access in vehicular environments (WAVE) is defined to provide a networked environment supporting very high speed transactions to enable safety and mobility applications. Adaptive Enhanced Distributed Channel Access (EDCA) mechanism based on IEEE 802.11p WAVE for vehicular ad-hoc network (VANET) to improve medium access ratio is proposed in this paper. The priority categories...
In this thesis, a Dedicated Short Range Communication(DSRC) Mobile Medium Access Control(MAC) algorithm to provide Vehicle-to-Vehicle(V2V) communication is implemented. Since the DSRC is a master-slave communication system, an On-board Equipment(OBE) does not have a function to transmit the Frame Control Message Channel(FCMC). To provide V2V communications, this thesis suggests an additional function...
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