Navegando por Assunto "Redes ad hoc veiculares"

Agora exibindo 1 - 2 de 2

Acesso aberto (Open Access)
Platoon-based driving protocol for multimedia transmission over vanet
(Universidade Federal do Pará, 2019-02-22) LOBATO JÚNIOR, Wellington Viana; VILLAS, Leandro Aparecido; http://lattes.cnpq.br/9830590737740134; ROSÁRIO, Dênis Lima do; http://lattes.cnpq.br/8273198217435163
Vehicular Ad-hoc NETworks (VANETs) allow users, services, and vehicles to share information, and will change our life experience with new autonomous driving applications. Multimedia will be one of the core services in VANETs, and are becoming a reality in smart environments, ranging from safety and security trafic warnings to live entertainment and advertisement videos. However, VANETs have a dynamic network topology with short contact time, which leads to communication aws and delays, increasing packet loss and decreasing the Quality of Experience (QoE) of transmitted videos. To cope with this, neighbor vehicles moving on the same direction and wishing to cooperate should form a platoon, where platoon members act as a relay node to forward video packets in autonomous VANETs. This master's dissertation introduces a Game Theory approach for Platoon-based driving (GT4P) for video dissemination services in urban and highway VANET scenarios. GT4P encourages the cooperation between neighbor vehicles by offering reward (money or coupon) for vehicles participating in the platoon. In this sense, GT4P establishes a platoon by taking into account vehicle direction, speed, distance, link quality, and travel path, which reduces the impact of vehicle mobility on the video transmission. Simulation results confirm the eficiency of GT4P for ensuring video transmissions with high QoE support compared to existing platoon-based driving protocols.
Acesso aberto (Open Access)
Um Protocolo de roteamento colaborativo para transmissão de vídeo com computação em névoa em redes ad hoc veiculares
(Universidade Federal do Pará, 2019-03-22) BEZERRA, Paulo Henrique Gonçalves; CERQUEIRA, Eduardo Coelho; ROSÁRIO, Denis Lima do; http://lattes.cnpq.br/8273198217435163
Vehicular Ad hoc Networks (VANETs) play an important role in the efficiency of road traffic by improving safety and acting as a facilitator of services for passengers, drivers and public safety officers. Recent improvements in the routing protocols and topologies used in vehicular networks have contributed to improvements in scalability, reliability and the quality of the information-sharing experience. Vehicles can cooperate with each other to stream videos of accidents or disasters and provide visual information of the monitored area with great precision. This Ph.D thesis proposes a Collaborative Routing Protocol for Video streaming VANETs (CRPV) using the service of fog storage to minimize the sharing of content. The routing table is based on an indicator that is generated by combining the speed, location and recording angle parameters of each vehicle involved in vehicular collaboration to reduce the unnecessary exchange of video data in vehicle-to-vehicle communications. The results of the simulations show that the proposed model performs favorably when compared to other routing protocols with respect to the availability of end-to-end communication and Quality of Experience.