DTN performance analysis of multi‐asset Mars‐Earth communications

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ANÁLISE DE SEGURANÇA A PROTOCOLOS DE COMUNICAÇÃO DE ELEVADA LATÊNCIA

As redes de comunicação interplanetárias enfrentam desafios que as redes de comunicação terrestre não enfrentam. Com o evoluir da tecnologia é importante analisar as soluções de segurança e verificar se as mesmas têm impacto na performance da rede. Com este trabalho o objectivo é verificar se a introdução de mecanismos de segurança nas comunicação interplanetárias tem impacto na performance da rede. Para isso foram implementados testes numa rede DTN utilizando a implementação ION com e sem segurança para se conhecer o seu impacto. Com base nos resultados conseguidos foi concluído que o impacto dos mecanismo de segurança na performance da rede se altera consoante o tamanho dos ficheiros transmitidos e sendo que o mecanismo que mais teve influência foi o de verificação de confidencialidade

Unmanned Aerial Vehicle (UAV)-Enabled Wireless Communications and Networking

The emerging massive density of human-held and machine-type nodes implies larger traffic deviatiolns in the future than we are facing today. In the future, the network will be characterized by a high degree of flexibility, allowing it to adapt smoothly, autonomously, and efficiently to the quickly changing traffic demands both in time and space. This flexibility cannot be achieved when the network’s infrastructure remains static. To this end, the topic of UAVs (unmanned aerial vehicles) have enabled wireless communications, and networking has received increased attention. As mentioned above, the network must serve a massive density of nodes that can be either human-held (user devices) or machine-type nodes (sensors). If we wish to properly serve these nodes and optimize their data, a proper wireless connection is fundamental. This can be achieved by using UAV-enabled communication and networks. This Special Issue addresses the many existing issues that still exist to allow UAV-enabled wireless communications and networking to be properly rolled out

DTN Performance in Complex Deep-Space Networks

The Delay-lDisruption Tolerant Networking (DTN) architecture has long been analyzed in terms of the Bundle Protocol (BP) and the Licklider Transmission Protocols (LTP) performance, when used in deep space environments. The research conducted so far focused mostly on the performance of specific protocols under simplified network conditions, thus missing some key aspects of real space communication operations. This paper tries to bridge this gap by providing a more exhaustive analysis of DTN performance in deep-space environments, and considers the interaction between routing and the overall data delivery delay achieved by thejoint use of the BP and LTP protocols. An extensive experiment campaign has been performed on a virtualized testbed based on ION software to collect results in complex scenarios and translate them into significant observations about space operations