Impact of relative speed on node vicinity dynamics in VANETs

Medeiros, Dianne S. V.; Hernandez, Dayro A. B.; Campista, Miguel Elias M.; Pedroza, A.C.P.

doi:10.1007/s11276-017-1654-3

Cited by 7 publications

(6 citation statements)

References 26 publications

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“…In general, after receiving a package via IEEE 802.11p, the OBU can transfer it through Wi-Fi to the tablets and smartphones. With all this information obtained via Wi-Fi, thanks to the vehicular ad-hoc network (VANET) [39][40][41][42][43][44] application, it is possible to help the driver in monitoring vehicle status and threats from surrounding vehicles [45]. When the tablet estimates an incoming collision, it will inform the driver with a warning on the screen and a voice alert.…”

Section: Vehicle Safety Applicationmentioning

confidence: 99%

V2X Communications Applied to Safety of Pedestrians and Vehicles

Arena

Pau

Severino

2019

JSAN

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Connected cars and vehicle-to-everything (V2X) communication scenarios are attracting more researchers. There will be numerous possibilities offered by V2X in the future. For instance, in the case of vehicles that move in a column, they could react to the braking of those in front of it through the rapid information exchanges, and most chain collisions could be avoided. V2X will be desiderated for routes optimizations, travel time reductions, and accident rate decrease in cases such as communication with infrastructures, traffic information exchanges, functioning of traffic lights, possible situations of danger, and the presence of construction sites or traffic jams. Furthermore, there could be massive conversations between smartphones and vehicles performing real-time dialogues. It is relatively reasonable to expect a connection system in which a pedestrian can report its position to all surrounding vehicles. Regarding this, it is compelling to perceive the positive effects of the driver being aware of the presence of pedestrians when vehicles are moving on the roads. This paper introduces the concepts for the development of a solution based on V2X communications aimed at vehicle and pedestrian safety. A potential system architecture for the development of a real system, concerning the safety of vehicles and pedestrians, is suggested to draft some guidelines that could be followed in new applications.

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Section: Vehicle Safety Applicationmentioning

confidence: 99%

V2X Communications Applied to Safety of Pedestrians and Vehicles

Arena

Pau

Severino

2019

JSAN

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“…As contribuições principais deste trabalho trazem inovações que foram reconhecidas pela comunidade científica, resultando em publicações em revistas internacionais [Medeiros et al 2018, Medeiros et al 2017b], e congressos nacionais [Hernandez et al 2015, Medeiros et al 2016a, Medeiros et al 2017a] e internacionais [Medeiros et al 2016b].…”

Section: Contribuições Da Teseunclassified

O Poder dos Caminhos Quase Mais Curtos e o Impacto da Mobilidade dos Nós em Redes Dinâmicas

Medeiros¹,

Campista²

2018

Anais Estendidos Do XXXVI Simpósio Brasileiro De Redes De Computadores E Sistemas Distribuídos (SBRC Estendido 2018)

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Este trabalho investiga o impacto da mobilidade dos nós na transferência de dados em múltiplos saltos, o efeito do uso de caminhos um pouco maiores do que os mais curtos na importância relativa dos nós e o desempenho da rede na presença de falha em nós centrais. Para analisar o primeiro aspecto, propõe-se a (κ, λ)-vizinhança, que estende o conceito de vizinhança para incluir nós a múltiplos saltos, restringindo o estabelecimento de enlaces de acordo com a velocidade relativa entre os nós. Os resultados obtidos são usados no desenvolvimento de três estratégias de encaminhamento, que resultam em uma redução signiﬁcativa do consumo de recursos, sem provocar grande impacto na taxa média de entrega de pacotes. O segundo aspecto é analisado através da intermediação ρ-geodésica, uma métrica de centralidade proposta neste trabalho, que usa outros caminhos além dos mais curtos para quantiﬁcar a importância relativa dos nós. O custo desses caminhos é limitado por um fator de espalhamento ρ. O terceiro aspecto é analisado através de simulações nas quais são provocadas falhas em nós centrais. Esses nós, quando classiﬁcados segundo a métrica proposta, estão em posições menos críticas em relação à conectividade da rede. Logo, os nós mais centrais de acordo com a intermediação ρ-geodésica são mais resilientes a falhas de outros nós. Isso é essencial para determinar o papel que cada nó deve exercer para a rede.

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“…As for the urban event, solutions must deal with: a) Mobility [18] -the event can vary its position over time; and b) Simultaneity [19] -events occur simultaneously at different locations in the environment. In addition, the vehicular environment also imposes its own challenges: i) Traffic model [20] [21] -the environment may hold different traffic patterns depending on the time and the traffic regulations; ii) Node speed [22] -high variability in vehicle speed directly affects the communication; and iii) Density [23] -traffic density varies over time and space due to the highly dynamic nature of VANETs.…”

Section: Introductionmentioning

confidence: 99%

Analyzing Cooperative Monitoring and Dissemination of Critical Mobile Events by VANETs

Andrade,

Santos,

Maciel

et al. 2020

Preprint

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The treatment of mobile and simultaneous critical urban events requires effective actions by the appropriate authorities. Additionally it implies communication challenges in the speed and accuracy of their occurrence by the entities, as well as dealing with the dynamics and speed in these environments. Cooperative solutions with shared resources that address these challenges become a real option in helping to handle these events. This paper presents an evaluation of dynamic monitoring and collaborative dissemination supported by vehicular groups. It aims to analyze the impact of multiple mobile and fixed events in an urban environment on information propagation, considering barriers imposed by the events and the environment. Differently from other studies in the literature, this work takes into account both fixed and mobile events, as well as simultaneous events. NS3 results show that the evaluated system monitored at least 87% and 51.5% of the time for mobile and fixed events respectively, and delivered information over 77% and 50% of the time for those events, with average delay remains close to 0.3s in most scenarios. The results also reveal that a more continuous monitoring of the mobile events is highly dependent on the orientation of the vehicles. The main contribution of this work consists of the performance analysis of both fixed and mobile simultaneous events to support studies on how moving events impact on the dissemination and delivery of real-time data, and thus encouraging the development of new data dissemination protocols for VANETs.

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Impact of relative speed on node vicinity dynamics in VANETs

Cited by 7 publications

References 26 publications

V2X Communications Applied to Safety of Pedestrians and Vehicles

V2X Communications Applied to Safety of Pedestrians and Vehicles

O Poder dos Caminhos Quase Mais Curtos e o Impacto da Mobilidade dos Nós em Redes Dinâmicas

Analyzing Cooperative Monitoring and Dissemination of Critical Mobile Events by VANETs

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