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The number of connected cars and the massive consumption of digital content on the Internet have increased daily. However, the high mobility of the vehicles, coming from patterns’ variation over time, makes efficient large-scale content distribution quite challenging. In light of this, the emerging Vehicular Named Data Network (VNDN) architecture provides support for content-centric network communications and caching capabilities, which allows reliable and larger-scale content delivery over Vehicular Ad-Hoc Networks (VANETs). This notwithstanding, the high number of interest packets in VNDN tends to introduce broadcast storm occurrences during the cache discovery process. Thus, network performance degradation comes up for the influence of both increased packet loss rates and delays on content recovery during communication between vehicles. This work proposes a new cache discOVEry pRoTocol (OVERT VNDN), which combines the computational geometry and degree centrality concepts to tackle the VNDN performance degradation challenges and issues. The main idea behind OVERT VNDN is to choose the most appropriate relay vehicles to engage interest packets’ delivery within the VNDN, seeking to achieve higher network performance by optimizing broadcast storm incidence. The obtained results suggest that OVERT VNDN outperforms its competitor in the following key performance indicators: (i) improving the cache discovery process by 120.47%; (ii) enhancing the content delivery rate by 43%; and (iii) reducing the number of interest packets by 80.99%.

Este resumo estendido apresenta uma visão geral das principais contribuições da pesquisa de mestrado. O trabalho tem como objetivo desenvolver protocolos eficientes para comunicação V2V em VNDN, com o intuito de garantir alta taxa de entrega de conteúdo e reduzir o broadcast storm durante o processo de descoberta de cache. Os protocolos propostos foram avaliados e comparados com protocolos existentes na literatura por meio de simulações computacionais. Os resultados das simulações mostram que os protocolos propostos possuem um bom desempenho em três pontos chaves:(i) taxa de cache hit; (ii) taxa de entrega de conteúdo e (iii) transmissão de pacotes de interesse.