Navegando por Assunto "Roteamento geográfico"

Agora exibindo 1 - 1 de 1

Acesso aberto (Open Access)
Um mecanismo para realçar a conectividade de roteamento geográfico na transmissão multimídia em VANTs
(Universidade Federal do Pará, 2014-06-16) COSTA, Rodrigo Medeiros; CERQUEIRA, Eduardo Coelho; http://lattes.cnpq.br/1028151705135221
Networks of Unmanned Aerial Vehicles (UAVs) have enhanced the use of multimedia applications due to their high degree of mobility and versatility. This increase occurs due the accessibility and use of UAVs quadricopters in several civilian applications. Civilian applications have as main characteristic the use of multimedia data such as videos, because they o er a more detailed visual perspective of the environment. The transmission of such data in UAV networks by geographic protocols improves the rate of data delivery. However, it is not su cient to provide quality of experience (QoE). This is because the high degree of mobility of the quadricopters, which leads to link breaks during multimedia transmission. Consequently, it impairs connectivity and induces high packet losses and delays. Therefore, this paper proposes a mechanism called RCRV, based on techniques for predicting mobility in terms of positioning and link estimation time to enhance the decision making process in geographic routing protocols. Furthermore, it employs criteria that consider the behavior of mobility of UAVs. Thus, RCRV enables the extension of connectivity in UAV networks. The RCRV is a mechanism that complements the strategies of geographic routing protocols. In this way, added the RCRV to the GPSR protocol to evaluate the gains and bene ts of him in a geographic routing protocol. Simulations were performed with di erent speeds and numbers of UAVs. The results showed that the RCRV increases the connectivity in the multimedia transmission, improving the delivery of multimedia content and video quality observed by the user.