Improving connectivity in vehicular ad hoc networks: An analytical study

Yousefi, Saleh; Altman, Eitan; El-Azouzi, Rachid; Fathy, Mahmood

doi:10.1016/j.comcom.2007.10.045

Cited by 68 publications

(50 citation statements)

References 8 publications

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“…The connectivity analysis of VANETs for both highway and simple road configurations presented in [13] proposed that a fixed transmission range does not adapt to the frequent topology changes in VANETs; but a dynamic transmission range is always required. In [14], authors presented a way to improve the connectivity in VANET by adding extra nodes known as mobile base stations. The connectivity properties of a mobile linear network with high-speed mobile nodes and strict delay constraints were investigated in [15].…”

Section: Related Workmentioning

confidence: 99%

“…Recently, there were many attempts by the research community to address the connectivity properties of VANETs as well [13][14][15][16][17][18][19][20][21][22][23]. The connectivity analysis of VANETs for both highway and simple road configurations presented in [13] proposed that a fixed transmission range does not adapt to the frequent topology changes in VANETs; but a dynamic transmission range is always required.…”

Section: Related Workmentioning

confidence: 99%

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Connectivity analysis of one-dimensional vehicular ad hoc networks in fading channels

Chandrasekharamenon

AnchareV

2012

J Wireless Com Network

118

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Vehicular ad hoc network (VANET) is a type of promising application-oriented network deployed along a highway for safety and emergency information delivery, entertainment, data collection, and communication. In this paper, we present an analytical model to investigate the connectivity properties of one-dimensional VANETs in the presence of channel randomness, from a queuing theoretic perspective. Connectivity is one of the most important issues in VANETs to ensure reliable dissemination of time-critical information. The effect of channel randomness caused by fading is incorporated into the analysis by modeling the transmission range of each vehicle as a random variable. With exponentially distributed inter-vehicle distances, we use an equivalent M/G/∞ queue for the connectivity analysis. Assuming that the network consists of a large number of finite clusters, we obtain analytical expressions for the average connectivity distance and the expected number of vehicles in a connected cluster, taking into account the underlying wireless channel. Three different fading models are considered for the analysis: Rayleigh, Rician and Weibull. The effect of log normal shadow fading is also analyzed. A distance-dependent power law model is used to represent the path loss in the channel. Further, the speed of each vehicle on the highway is assumed to be a Gaussian distributed random variable. The analytical model is useful to assess VANET connectivity properties in a fading channel.

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Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

Connectivity analysis of one-dimensional vehicular ad hoc networks in fading channels

Chandrasekharamenon

AnchareV

2012

J Wireless Com Network

118

View full text Add to dashboard Cite

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“…They focus mainly on information propagation speed for vehicle-to-vehicle communications. In [9], the authors analyze the probability of connectivity using RSUs. The average length of a connected path from any given vehicle to an RSU is also calculated.…”

Section: Related Workmentioning

confidence: 99%

Delay Analysis for a Reliable Message Delivery in Sparse Vehicular Ad Hoc Networks

Abdrabou

Liang

Zhuang

2010

2010 IEEE Global Telecommunications Conference GLOBECOM 2010

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Abstract-In this paper, we address the relation between message delivery delay and reliability for the communication between a vehicle and a road side unit (RSU). We focus on sparse or low density vehicular ad hoc networks (VANETs), where timely message delivery and reliable transmission are of significant importance. We present an exact message delivery delay distribution for a two-lane road, where vehicles in one direction act as message carriers for the ones in the other direction and have the freedom to leave the road from randomly distributed exits with a certain probability. Our analysis offers a tool for an intelligent transportation system (ITS) service provider to determine the minimal separation between two consecutive RSUs for meeting a probabilistic requirement of the message delay. Simulation results show the accuracy of our analysis.

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“…Therefore, it could be quite reasonable to consider single-hop dissemination as an important type of future inter-vehicle communications. However, in particular for alarm and comfort messages, multi-hop message propagation as well as multi-hop connectivity is challenging and has been studied in some recent works, for example, Yousefi et al 2008, Resta et al 2007. Note that, when we focus on 1-hop beacon dissemination, we get involved in the MAC layer broadcasting which is quite different from network layer broadcasting (beacon messages normally need single-hop broadcasting at MAC layer while alarm safety messages and comfort messages usually demand multi-hop roadcasting/unicasting in the network layer).…”

Section: Evaluation Metrics For Safety Scenariosmentioning

confidence: 99%

Metrics for Performance Evaluation of Safety Applications in Vehicular Ad Hoc Networks

Yousefi

2008

Transport

Self Cite

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In the recent years, direct message exchange between vehicles in order to improve the safety of road traffic has been attracting lots of interest in both networking and road safety communities. While travelling on a road, vehicles form an ad hoc network called Vehicular Ad hoc NETwork (VANET) and deploy life safety applications. Evaluating the performance of these applications is primordial for realizing VANETs in real life. Current literature lacks efficient ways to evaluate the performance of safety applications and mostly leverages on classical networking metrics like delay, delivery rate etc. In this paper, we consider both networking and safety concerns simultaneously to come up with more efficient methods. In particular, we first point out the significance of fairness and coverage from safety viewpoint. Then, we introduce two new metrics called beaconing rate and effective range aiming at providing more facilities for safety performance evaluation in VANET s research. Furthermore, realizing special characteristics of safety applications while disseminating beacon messages, we study the way that beacon dissemination protocols affect the performance of safety applications. We then conduct extensive simulation study to show the usefulness of the introduced metrics and derive some insights on the feasibility of driver‐assistant safety applications. Our evaluation also shows that sending the aggregated status of neighbouring vehicles in addition to vehicle's own status, and instead, increasing beacon transmission interval may be invoked in order to assist safety applications in providing satisfactory services to drivers.

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Improving connectivity in vehicular ad hoc networks: An analytical study

Cited by 68 publications

References 8 publications

Connectivity analysis of one-dimensional vehicular ad hoc networks in fading channels

Connectivity analysis of one-dimensional vehicular ad hoc networks in fading channels

Delay Analysis for a Reliable Message Delivery in Sparse Vehicular Ad Hoc Networks

Metrics for Performance Evaluation of Safety Applications in Vehicular Ad Hoc Networks

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